Many gold deposits have been found in the western section of East Kunlun Mountains in Qinghai Province.This area is characterized by complex geological structure，frequent magmatic activity and excellent metallogenic conditions.The geology and prospecting potential of gold deposit were carried out and the metallogenic regularity of gold deposits was preliminarily summarized in this area.However，the late discovery of the deposit and inconvenient natural conditions restrict the systematic study of the genetic types of gold deposits and the establishment of the metallogenic model of the main types of gold deposits in the area，which seriously restricts the breakthrough of gold exploration.Based on the classification of gold deposits at home and abroad and the 27 gold deposits（points） discovered in the study area，this paper determines that the genetic types of gold deposits in the study area are orogenic type，contact metasomatic type，post magmatic medium and low temperature hydrothermal type and mechanical sedimentary type.Among the 27 deposits，there are 18 orogenic gold deposits，accounting for two-thirds.The estimated resource of orogenic gold deposits accounts for 51%.Therefore，orogenic gold deposits are the most important type in the western section of East Kunlun.Through the analysis of metallogenic environment，it is considered that orogenic gold deposits in the area mainly formed in the Late Triassic.Deep fault is the main ore controlling structure，while ductile shear zone，secondary brittle fault，structural fracture and interlayer fracture zone are good ore storage structures.The ore-forming materials come from the background of post collision compression strike slip，and tectonism provides the basis for the accumulation and precipitation of ore-forming materials.Through the study，the metallogenic model of gold deposit in the study area is preliminarily established.Regional metallogenic model of gold deposit manifested as：In the Triassic collision-post collision stage，the regional crust mantle interaction strongly formed the mantle crust derived granite and its related gold mineralization system.The main types of gold deposits are contact metasomatic type and post magmatic medium and low temperature hydrothermal type，which occur in the outer contact zone of the rock mass and the top of the rock mass respectively.The former is such as Haxiyatu deposit and Tawenchahanxi deposit，and the latter is such as Kude’erte deposit.At the same time，the whole region is under the condition of compressive strike slip deformation tectonic stress，and the deep and large fault activity is strong，which leads to the deep metamorphic hydrothermal solution and controls the development of ductile shear zone.The deep metamorphic hydrothermal fluid moves upward under the control of the ductile shear zone. In the process of metamorphism，the ore-forming materials dispersed in the formation rocks are activated into the metamorphic fluid and become the gold initially enriched in the ore bearing hydrothermal medium basic volcanic rocks and other rocks，forming the gold bearing metamorphic hydrothermal fluid.In the ductile brittle deformation transition zone of ductile shear zone，or its side brittle fracture，structural fracture and interlayer structural zone，due to the reduction of pressure and the temperature of gold bearing metamorphic hydrothermal solution，gold and other metallogenic elements precipitated and formed orogenic gold deposits.After the Late Paleozoic-Early Mesozoic orogeny，the region continued to develop intracontinentally （basin mountain transformation），the mountains rose strongly，and placer gold deposits were formed in Cenozoic.
In order to solve the problem that restrict the breakthrough of prospecting（such as ore controlling factors and deposit genesis） in Duoguma antimony gold mining area， the 1∶200 000 As乙41Sb （Au） stream sediment anomaly and 1∶50 000 Au、As、Sb stream sediment anomaly in Duoguma area of Maduo County were examined by high-density electrical method， and the North Duoguma antimony gold mining point and its periphery were mainly detected.The plane resistivity anomaly shows that the regional NW trending Kunlun Mountain pass Maduo-Gande-Jiuzhi fault is transformed by the later NE trending fault dislocation in this area.High value charge rate （polarizability） anomalies are superimposed at the intersection of the two groups of fault structures. The long axis direction of these anomalies is consistent with the trend of regional structure， and the location is mainly distributed on the side of structural tendency.Combined with the analysis of resistivity section anomalies， these widely distributed and strong anomalies are mainly distributed in the contact zone between regional structure and surrounding rock. The charging rate （polarizability） anomaly combined with the anomaly of polymetallic elements such as antimony and gold in geochemical exploration is selected as the prospecting target for engineering verification.The antimony gold orebody is revealed through trenching engineering， realizing the prospecting breakthrough of the polymetallic prospecting target.
Sanhetun gold deposit is a newly discovered small-sized deposit in Nenjiang City，Heilongjiang Province，which is located in the eastern part of Xing-Meng orogenic belt，at the intersections of Xing’an and Songnen blocks，and the convergence sites of Duobaoshan island arc belt，Nenjiang-Heihe tectonic mélange belt，Xinkailing micro-block and Taxi volcanic arc.In recent years，a lot of gold orebodies have been delineated in the mining area through the large-scale investigation of land and resources and mineral exploration，however，the genesis of ore deposits and ore types are lack of systematic research.Therefore，the comprehensive analysis are focused on the characteristics of orebodies and ores in the mining area，the ore-controlling characteristics of regional structures and the metallogenic characteristics of typical gold deposit.The results show that Sanhetun gold deposit occurs in the overlapping area between Cretaceous volcanic rocks，clastic sedimentary rocks and Early Carboniferous mylonitic granites，and the ore type is tectonic altered rock.The orebody overall strikes NE，inclines NW with slow dip angle.The wall rock alteration is mainly silicification and sericitization.The ore minerals are composed of pyrite，sphalerite，chalcopyrite with minor native gold and telluride.At present，the gold deposit are not completely controlled in the extension and depth direction，and there is still great metallogenic potential.The Nenjiang-Heihe tectonic melange belt is an important part of the next breakthrough of gold prospecting in Heilongjiang Province.
The mineralization of Linglong gold ore-field is controlled by faults.In the process of gold mineralization，the fault is not only the channel of mineralization fluid，but also the surrounding rocks in direct contact with mineralization fluid.The fluid and wall rocks on both sides of the fault must have metasomatic reactions.Therefore，it is of great significance to study the geochemical characteristics of bedrock in fault profile for metallogenic research and prospecting prediction.Based on the study of geochemical characteristics of bedrock profiles of ore-bearing faults and Zhaoping fault in Linglong gold field，taking ascertain orebody as research template，a comprehensive study of the correlation between Au and other trace elements in orebody-wall rock，lean-rich ore，local-whole was conducted.Combined with mineralogical characteristics and geo-chemical characteristics of element halo of gold deposit，application research on metallogenic prediction of unknown orebodies was performed.Regarding 7 orebodies profile as the research object，by comparing the correlation between Au and trace elements in orebody and surrounding rock，the variation characteristics and correlation of trace elements in orebody profile in local range were analyzed，and the best indicator elements of Au in typical orebodies in the ore field were summarized.According to the gold grade，352 orebodies can be divided into five types （super rich ore，rich ore，lean ore，super lean ore，surrounding rock）.The average content of trace elements in various orebodies was counted， and the difference in the indication meaning of trace elements in rich and poor ores was compared.On the premise of a large number of sample data statistics， the correlation between Au and other trace elements in the Linglong ore field was summarized through scatter plots. Combined with the occurrence form of gold and various trace elements， the geological significance of Au and various trace elements， and the diagenesis and mineralization mechanism of Linglong gold ore field were discussed.The above research results were applied to other faults in Linglong gold field，and the primary halo geochemical halo method was used to predict fault mineralization.The following understandings are obtained：The best indicator element combination of primary halo in Linglong gold field is Au，Ag，Bi，As and Co，and the positive correlation of power exponent among Au with Ag，Bi，As and Co elements is good.Gold exists in the form of silver gold ore，mainly in the form of fine grains or veins in the fissures and crystal gaps of pyrite.The geochemical survey of bedrock profile of Zhaoping fault shows two gold mineralization anomalies，which are supposed to be ore-induced anomalies and have good prospecting potential，especially in the 1021 profile of east Qianhuayuancun.Based on the geochemical survey method of bedrock in fault profile，the prospecting object is expanded by changing prospecting into halo，and the deep metallogenic prospect can be predicted according to the difference of halo forming element distribution.
The Yunnan-Guizhou-Guangxi area and its surrounding area in China are the carlin-type gold deposit producing areas，which is one of the most important gold resources producing areas in China.Based on the study and prospecting practice of gold deposits in southwest Guizhou，the structural body alteration （SBT） is expanded，its discriminant index was established，and the relationship between regional mineralization and prospecting space was briefly described.The results show that structural body alteration is the product of mineralization and occurs between the unconformity surface and lithologic layer interface where the rock capacity varies greatly.Based on the structural body alteration of regional multi-level output，the multi-level structural detachment metallogenic system of carlin-type gold deposits in Yunnan-Guizhou-Guangxi area is constructed，which lays the foundation for the systematic study of regional carlin-type gold deposits.It is of great significance to establish the discriminant index and identify the structural body alteration accurately for the metallogenic prediction and prospecting of carlin-type gold deposits in Yunnan-Guizhou-Guangxi and its surrounding areas.
The indoor uniaxial compression tests were carried out on four filling specimens with different sizes of 40 mm，70.7 mm，100 mm and 150 mm.The effects of size changes on the energy evolution law and damage mechanism of filling were studied，and the precursory criterion of filling body failure based on elastic energy consumption ratio was obtained.The results show that the energy evolution laws of different sizes of fillings under uniaxial compression are similar，which are reflected in that the elastic strain energy is mainly accumulated before the peak stress，the energy is released and dissipated during the failure process of the specimen，the curve of dissipated energy and elastic energy shows an alternating growth trend，and the proportion of dissipated energy increases continuously and exceeds the elastic strain energy rapidly after the peak stress.With the increase of specimen size，the total input strain energy，elastic strain energy and dissipation energy of the filling body at the peak stress show a nonlinear downward trend，indicating that the energy storage limit and bearing capacity of the filling body are decreasing with the increase of specimen size.The dissipative energy characteristics of the filling body can better reflect the four stages of damage evolution in the filling body.In the initial damage stage and the stable development stage of damage，the variation range of the dissipation energy curves of the sample with the size of 40 mm is slightly larger than that of the sample with other sizes.In the stage of damage acceleration and damage failure，the corresponding curves of 40 mm and 70.7 mm samples and 100 mm and 150 mm samples show two different growth trends.The smaller the size is，the more severe the damage is.The larger the size of the filling specimen is，the greater the change range of the elastic energy consumption ratio K value of the specimen is.The elastic energy consumption ratio K value curve increases first and then decreases，continues to a low value，and then increases near the peak stress.This variation law of K value curve of elastic energy consumption ratio can be used as the precursory characteristic of critical failure of filling body.
Determining the rock mechanical parameters by static experiments is of great significance for optimizing the open-pit bench blasting scheme and improving the blasting effect.Therefore，the rock mass in an open-pit copper mine in China was taken as the research object，by applying the HM-82L rebound hammer whose impact kinetic energy is 0.735 Nm，a large number of in-situ measurements of rock mass mechanical properties were conducted.Meanwhile，dozens of standard samples were prepared from the on-site rock core.On the one hand，the test of rock longitudinal wave velocity was carried out by using SET-PLT-02 ultrasonic testing instrument，and the uniaxial compression experiment was performed as well based on the MTS-322 hydraulic-servo mechanical testing machine.The result of field rebound measurement indicates that the rebound value of the porphyry at the southern end of the mining area is greater than that of the skarn at the northern end，and the rebound value gradually decreases with the increase of the weathering degree of the rock mass.In addition，the results of indoor physical and mechanical test show that the variation laws of rock wave velocity，uniaxial compressive strength and elastic modulus are generally consistent with the rebound value，it is shown from the fitting curves that there are linear positive correlations between P-wave velocity，uniaxial compressive strength and rebound value，whereas an exponential correlation is generated between elastic modulus and rebound value.All the fitting correlation coefficient indicate that it is reliable to estimate the rock wave velocity and basic mechanical parameters by using the rebound value.The achievements of this study provide a reliable methodology to quickly and reliably obtain the basic physical and mechanical indicators of the rock mass in the open-pit copper mine.
Under a certain stress state，the thermal induced stress field and the initial stress field are superimposed，resulting in the initiation of new thermal cracks on the basis of the original cracks，which affects the mechanical properties of the rock.However，the effect of thermal stress field can also be applied to rock crushing.It is necessary to study the fracture caused by thermal and mechanical action of rock.Due to the limited monitoring technology of the experiment under high temperature，the relevant research is difficult to carry out.Using the method of combining experiment and simulation，based on the experiment and the discrete element method，the cracking process caused by heat and force of prefabricated crack model with different inclination angles was studied under different initial stress states. The relevant thermal eigenvalues were analyzed，and the propagation path of thermal crack was theoretically analyzed according to the
In order to study the influence of rock drilling and blasting on the stability of phosphogypsum cemented filling body with different phosphogypsum-to-the new mortar ratios and different curing times，the dynamic mechanical properties of the phosphogypsum cemented filling body were studied.By using the Hopkinson pressure bar（SHPB） experimental device to axially impact filling body at different loading speeds，the waveform curves，stress-strain curves，dynamic compressive strength，dynamic increase factor（DIF），the failure modes，and the relationship between the average strain rate of the filling body and the ratio of the filling materials were analyzed.The results show that the wave impedance of the phosphogypsum cemented filling body is small and can dampen the stress wave.Under the conditions of the same ratio，same curing and different strain rates，the descending section of the stress-strain curve of the filling body is basically the same，while the difference in the ascending section is more obvious.For the group with the highest static compressive strength，the growth rate of stress increases rapidly with the increase of strain，while the dynamic compressive strength and DIF both increase with the increase of the average strain rate，and the relationship between the dynamic compressive strength，DIF and average strain rates can be described by polynomial functions.When the curing time is the same，with the increase of the new phosphogypsum mortar ratio，the dynamic compressive strength and DIF of the filling body decrease，and relationship between the dynamic compressive strength of the filling body，DIF and the new phosphogypsum mortar ratio presents a polynomial function.When the proportion of new phosphogypsum mortar is the same，with the increase of curing time，the dynamic compressive strength and DIF of the filling body increase，and the dynamic compressive strength and DIF of the filling body have a polynomial function relationship with the curing time.When the average strain rate is less than 100 s-1，the fractured shape of the fillings is blocky，and when the average strain rate reaches 300 s-1，the fractured shape of the filling body is already powdery，indicating that the critical value of the average strain of the phosphogypsum cemented filling body is between 100 s-1 and 300 s-1.When the proportion of new phosphogypsum mortar is the same，the longer the curing time is，the lower the pulverization degree of the filling body is.When the curing time is the same，the larger the proportion of new phosphogypsum mortar，the higher the pulverization degree of the filling body.
The sublevel open stoping with delayed filling mining method has the advantages of large production capacity，high efficiency and low cost，and it is widely used in underground metal mines.However，at the same time，this method has a large amount of blasting charge and poor flexibility in application of the method，which puts forward higher requirements for blasting control.In particular，the cutoff slot blasting to provide the initial free surface and the blasting compensation space for the mining blasting is more important for the successful application of this method.When this type of mining method is used for cutoff slot blasting，it is easily confinement by surrounding rock，which can easily lead to over blasting and under blasting of cutoff slot，or even failure of cutoff slot blasting.The traditional long hole VCR method for cutoff slot blasting is limited by the blasting free surface，and the blasting effect is difficult to guarantee.In view of this problem，this paper taked Xincheng gold mine as the engineering background，analyzed the existing problems of traditional long hole VCR method for cutoff slot blasting，and proposed a new method for large-diameter long hole cutoff slot blasting method without cutting wells.Based on Livingston’s blasting filler theory，combined with the current production experience，the blast hole diameter，hole arrangement parameters，explosive unit consumption，primary blasting height，charge and packing parameters for large-diameter deep hole cutoff slot blasting were calculated.The traditional vertical deep hole retreat blasting method and the“Pin”-shaped retreat blasting method were compared and analyzed. The results show that when the “Pin”-shaped retreat blasting method is adopted，not only the free space in the lower part of the stope is used，but also the advanced free surface and compensation space created in the center due to the “Pin”-shaped layout，which can significantly improve the effect of deep hole blasting without cutoff well.At the same time，in order to improve the blasting effect of the central cut blasting hole，four blasting space compensation blasting holes are set between the blasting holes.Based on the above analysis results，a field industrial test was carried out in the -380 m sublevel of Xincheng gold mine.The blasting height is 3~6 m，the blast hole diameter is 100 mm，the row spacing and hole spacing of the blasting holes are 1.5 m respectively，the distance between the blasting side holes and the blasting boundary is 0.5 m，and the distance of space compensation hole and the blasting hole is 1.0 m，and the thickness of the blasting top is 6.75~12.75 m in the large-diameter deep hole cutoff slot blasting of Xincheng gold mine.The field industrial test results show that the designed caving amount of cutting slot is 4 105 t，the actual ore caving amount is 4 300 t，and the unit explosive consumption is 0.85 kg/t.The shape and size of the open stoping after blasting meet the blasting design requirements.
In order to accurately predict the displacement of waste dump slope with small samples and nonlinear characteristics，an EEMD-HW-PSO-ELM slope displacement combined prediction model based on empirical mode decomposition method，cubic exponential smoothing method and particle swarm optimization limit learning machine was proposed.Taking the GPS displacement monitoring data of Yiminhe open pit waste dump as an example to verify the effectiveness of the model，the research results show that the time series of slope displacement decomposed by EEMD model includes four IMF components and one margin.The decomposed data is reconstructed into trend term and fluctuation term with clear physical meaning.The cubic exponential smoothing method and particle swarm optimization limit learning machine were selected to predict the displacement of trend term and fluctuation term respectively.The equal weight superposition value is the final prediction result.The average relative error of the prediction value is 0.38% and the root mean square error is 1.15.BP model and Elman model were selected for comparative prediction.The results show that the com-bined prediction model has good prediction effect and can provide a theoretical basis for safety management.
Aiming at the problem that driving obstacles such as falling rocks or pedestrians may appear on the dim road of underground mine roadway，which seriously affects the safe driving of unmanned mine card，a fast detection optimization model RCR_YOLOv4 of roadway obstacles based on infrared vision recognition was proposed.Firstly，the infrared camera was used for data acquisition，random cutting，random flipping，mirror flipping and other methods were used to expand the experimental data set.Labeling software was used for data Labeling，and the infrared obstacle data set of mine roadway was built and loaded into the obstacle detection model.Secondly，K-Means ++ optimization algorithm was used to screen the prior frame size of obstacles in the roadway，and depth separable convolution was introduced to reduce the number of network parameters and computation，so as to improve the positioning accuracy and detection efficiency of obstacle targets.The dual-channel attention mechanism is designed to optimize the network feature fusion module to realize the high-precision detection of the obstacle of unmanned mine jamming.The results show that the detection accuracy of the model can reach 93.52% and the detection speed can reach 60.6 FPS.Compared with the current popular target detection networks such as Faster_RCNN，SSD and YOLOv4，RCR_YOLOv4 also shows better comprehensive performance and can provide guarantee for the safe driving of unmanned mine cards in the complex environment of mine roadway.
The dynamic response of underground engineering such as tunnel and mining roadway under the action of the explosion load of oil and gas is an important basis for engineering protection design and safety evaluation.The development of dynamic numerical simulation method in line with the characteristics of oil and gas explosion is of great significance for accurately analyzing the stability of underground engineering structures such as tunnel and mining roadway under liquefied petroleum gas （LPG） explosion. In this paper，fluid computational mechanics software FLACS was used to calculate the LPG explosion load in the tunnel. Based on transient dynamic analysis software LS-DYNA，the blast impact load was applied to the tunnel lining surface，and then the dynamic response of lining structure at different distances from the explosion center was calculated.By comparing the peak value of overpressure obtained by simulation with the calculation results of the empirical formula，the coincidence between the peak value of overpressure obtained by simulation and the calculation results of the empirical formula is high，which shows that the simulation method used in this paper has good applicability for analyzing the structural response of tunnel under LPG explosion in tunnel.Based on the numerical simulation results，the variation laws of stress，displacement and velocity of lining structure under LPG explosion load were studied.The results show that the “angular structure” of the tunnel has a strengthening effect on the reflection of shock wave，resulting in the formation of stress concentration at the corresponding position and the slow attenuation of the stress wave intensity.With the increase of the propagation distance，the stress on the lining decreases gradually and the stress value of the same section tends to be consistent.In addition，the velocity and displacement values at different measuring points on the same section are affected by the distance between measuring point and explosion center and the geometric structure of the tunnel.When the distance between measuring point and explosion center is larger than 12 m，the velocity and displacement values tend to be stable.The damage of top lining and bottom structure is more likely to occur under the action of blast load，and the damage degree of sidewall position is less.The research results provide a method basis for the safety and stability analysis of underground structures，and also have a certain reference value for the anti-explosion design of mining roadway structure and the corresponding support optimization in mining.
Flotation time is one of the important parameters in the design of concentrator.The length of flotation time has great influence on the recovery and utilization of mineral resources and the operation effect of the concentrator.The determination of flotation time is related to the flotation time and magnification factor of small laboratory tests.In view of the selection of flotation time for refractory gold ores and the verification of the amplification factor of the flotation time of the concentrator，the concentrator was designed on the basis of the design of a 1 500 t/d concentrator，and the actual flotation time and amplification factor were calculated.The flotation time of the pilot scale test was 31 min.The designed flotation time is 54 min，and the average amplification coefficient is 1.74（roughing K value is 1.5，cleaning K value is 2.50 to 2.67）.The actual flotation time of the concentrator is 68.99 min，and the actual amplification coefficient is 2.23（the actual rough scavenging K value is 1.86 to 2.41，and the actual cleaning K value is 1.88 to 3.45）.With the change of ore properties，the pilot scale test of flotation process optimization was carried out for the gold mine according to the change of ore properties.Compared with the flotation test in the design，the flotation concentration is increased from 25% to 28%，the -74 μm content of grinding classification product is reduced from 75% to 71%，and the collector butyl xanthate was replaced with iso-amyl xanthate.The amount of sodium carbonate in rough scavenging process increases by 500 g/t，the amount of copper sulfate decreases by 200 g/t，no more copper sulfate and sodium carbonate was added in scavenging，and the flotation time is reduced from 31 min to 21 min.On this basis，the mineral processing tests with the same grinding fineness，flotation concentration and system conditions were conducted in the mill.The best ore dressing plant capacity of 1 704 t/d was determined.Combined with the survey of flotation process，according to the laboratory flotation test，the time of flotation，the flotation machine volume of each activity and the concentration of flotation were determined.The flotation time and K value of each flotation operation in the concentrator were calculated.The total flotation time of the concentrator reaches 84.08 min，and the K value of the flotation time is 4.00.The K value of rough sweep selection is 3.96 to 4.21 with an average of 4.10，and the K value of clean selection is 3.66 to 4.00 with an average of 3.81.After optimization，ore processing capacity increase by 204 t/d，gold concentrate concentration ratio decrease by 0.11 and gold recovery rate increase by 3.22% when the gold grade of raw ore decrease by 0.47 g/t.The research provides reference for the design of concentrator of the same type ore.
The non-ferrous metal industry as a strategic and basic raw material has made great progress in the past 30 years for deepening reform and opening-up in China，but it is worth paying attention to the effect of industrial structure upgrading，especially before and after the supply-side reform.To better understand the process and effect of the upgrading of China’s non-ferrous metal industrial structure since the Seventh Five-Year Plan in 1986，based on the data from 1986 to 2019 of non-ferrous metal，this paper used the advanced coefficient，Moore structure change value，annual average change value and upgrade height value of industrial structure to construct a calculation model which reflects the direction，rate and degree of industrial structure upgrading.The industrial structure upgrading evolution of non-ferrous metal were calculated in four stages of output catch-up（1986—2001），rapid scale expansion（2002—2011），transformation and development （2012—2015） and high quality development（2016—2019）.The results show that the leading coefficient of mining and processing industry is decreasing in every stage，and the leading coefficient of smelting and pressing industry is increasing.The Moore value of the non-ferrous metal industry is close to 1 in all stages，the vector angle value shows a downward trend in the first three stages，the speed of upgrading slows down，then in the fourth stage increases obviously.The annual variation value of the vector angle is relatively stable in the first three stages，in the fourth stage the growth rate is faster than that in the first three stages.The average annual change value of industrial structure is relatively stable in the first two stages，the transformation and development in the third stage are slow，and after the supply-side reform，the average annual change value in the fourth stage has a new upgrade and remains at a certain level.The elevation value of the mining and processing industry has increased and decreased in various stages，and has been dynamically adjusted.The elevation value of the smelting and pressing industry has maintained a growing trend，and the non-ferrous metal industry has been upgraded more effectively.The conclusions of this paper are as follows：（1）After the supply-side reform，the over development of the non-ferrous metal industry has been effectively restrained，and the non-ferrous metal industry has been upgraded from low value-added to high value-added.（2）Over the past 30 years，the upgrading of the industrial structure of the non-ferrous metal industry has generally been in the process of optimization and upgrading，and the effect of supply-side reform has been remarkable.（3）The front end of the mining and selection industry is undergoing reform and adjustment，and the upgrading degree of the back end of the smelting and processing industry is rising rapidly，and take it to the next level.Research enlightenment：（1）From the direction of industrial upgrading，it is necessary to strengthen the mechanism of market capacity reduction and take effective measures to speed up the transformation and upgrading of smelting and calendering industries，this is significant for backend applications.（2）From the rate of industrial upgrading，adhering to the demand-oriented principle，we should accelerate the replacement of production capacity and the elimination of backward production capacity，raise labor productivity，and enhance the ability of processing enterprises to meet user needs quickly at low cost.We should intensify efforts to develop overseas resources for urgently needed mineral resources，provide more time for domestic supply-side reform.（3）From the perspective of industrial upgrading，we should strengthen scientific and technological innovation，improve the level of intensive processing，improve product quality，scientific and technological content，focus on the process to intelligent，flexible，refined and green.
The development of resource-based industry provides an important guarantee for promoting the national economic growth and industrialization process.A comprehensive and in-depth understanding of the research situation of Chinese scholars in the field of resource-based industry is conducive to grasp the overall research situation，promote the expansion and deepening of resource-based industry research，and promote the development of resource-based industry.In this paper，CNKI database was used as the data source to collect the core and above journal papers on resource-based industry from 2000 to 2020.CiteSpace was used to draw knowledge map from the distribution of authors and research institutions，key words co-occurrence network and time zone map.Based on objective data and knowledge map，this paper analyzes and summarizes the research status，research hotspots and knowledge evolution process of resource-based industry in recent 20 years.The research shows that the number of papers published and the fund support rate show an overall upward trend.Only a few academic teams have been formed among the authors，and the cooperative relationship between most authors is not obvious，showing a scattered and free state.Research institutions carry out research based on regional characteristics and disciplinary advantages，but do not form a close cooperation network，and some of the cooperation is only internal cooperation.The research focuses on the development of resource-based industries，resource-based cities，resource-based industrial clusters，industrial structure，resource-based industrial chain and resource-based industrial agglomeration.The process of knowledge evolution can be attributed to the gradual extension，refinement and in-depth research of the concept，theoretical basis and development countermeasures of resource-based industries，as well as the cross discussion and coordination of different research fields.The application of research methods has gradually diversified from scratch，and has changed from qualitative analysis to quantitative analysis.In the research area，scholars focus on the central and western regions.The future research direction can be explored from the aspects of relevant theoretical research of resource-based industry，innovative development model and sustainable development research.
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