Kangma area is located in the eastern part of the Tethys Himalayan tectonic domain，and it is a characteristic and important gold（antimony） metallogenic belt in the Qinghai-Tibet Plateau.Buzhu gold（antimony） deposit is located in the Kangma area where the EW trending fault and SN trending fault intersect，and the metallogenic geological conditions are good.In this paper，1∶10 000 soil geochemical survey of Buzhu gold（antimony） deposit in Kangma County，southern Tibet was studied.Eight trace elements from soil geochemical survey in the study area were analyzed statistically by using the coefficient of change of elements and the discrete characteristics of element enrichment.By discussing the metallogenic potential of eight trace elements and combining with the characteristics of Au，Ag，As，Sb and Pb with high coefficient of variation，large degree of dispersion and many mineralization in the study area，it is considered that Au is the main metallogenic element in the study area，and Ag，As，Sb and Pb can be used as important indicator elements to search for gold deposits in this area.Cluster analysis，correlation analysis and factor analysis were used to study the rule of element association.Three groups of element association were divided.The first group was the element association of Au，Ag，As and Sb，the second was the element association of Pb and Zn，and the third was the element association of Hg and Cu.Among them，the first group of Au，Ag，As，Sb element assemblage is the main ore-forming element assemblage in the study area，Au is the most important ore-forming element in the study area，Ag，As，Sb element is an important indicator element to search for gold deposits in the area，which has a good ore-prospecting prospect.The method of mean ±3 times standard deviation was used to study the geochemical anomalies and determine the lower limit of the anomalies.Combined with the contrast anomaly delineation method，seven major element comprehensive anomalies （HS-1~HS-7） with good correlation with gold elements were delineated.Combined with the regional metallogenic geological background and the geological-geochemical characteristics of the study area，two favorable prospecting target areas are delineated.The geochemical anomalies in the two target areas are significant，with prominent concentration centers and good combination of anomalies，which have great prospecting potential.Through the field geological survey，it was found that limonite fossil quartz vein was found in target area 1，and local intense limonitization occurred，which is a key ore prospecting area for the next step.
The Asiha vein-type gold deposit，located in the Eastern Kunlun orogenic belt，provides an excellent opportunity for deciphering precipitations of metals and origins of orogenic intrusion-related gold systems.Predecessors have proposed that Asiha gold deposit is an orogenic gold deposit or magmatic hydrothermal gold deposit related to intrusion body，and the genesis of the deposit is controversial.Gold precipitation is closely related to arsenic content and vulcanization，and the main precipitation mechanism is not clear.However，pyrite often occurs in many types of gold deposits，which can provide detailed mineralization information in explaining the source of ore-forming materials，the composition of ore-forming fluids and metallogenic physicochemical conditions，while colloidal pyrite with special structure can provide more important mineralization information.Pyrite is an excellent research object for constraining the genesis of ore deposits.There are two types of pyrite in Asiha gold deposit，namely，early euhedral crystalline pyrite and late colloidal pyrite.Through the study of the chemical composition and microstructure of colloidal pyrite，it is found that gold arsenic decoupling occurs in Asha gold deposit，and the gold precipitation is closely related to the particle size of pyrite.In order to clarify the genesis and gold precipitations of Asiha gold deposit，backscatter electron scanning microscope analysis，in-situ trace element analysis，area scan analysis and in-situ sulfur isotope analysis are carried out for colloidal pyrite.Colloidal pyrite is a parallel or irregular concentric ring belt with irregular complex surfaces.The transition between ribbons is a gradual transition.The bands on the strip often have the contraction pattern of the gel，and the width of the strip is 3~200 μm.Under high-power scanning electron microscope （SEM），it shows the aggregation of micron fine particles and dark gray substrate.Colloidal pyrite is rich in As （median of 3 164×10-6），Au （median of 4.15×10-6），Cu （median of 13 070×10-6），Pb （median of 1 157×10-6），Ag （median of 781.2×10-6），Sb （median of 1 668×10-6），but poor Co in （median of 44.48×10-6），Ni （median of 2.96×10-6） and Te （below the detection limit），and the Co/Ni ratio is greater than 10.The area scan shows clear zoning characteristics of As，Au，Co，Cu，Mo，Ag and Bi，and the distribution consistency of gold and arsenic is weak.The δ34S value range of colloidal pyrite（+6.1‰~+6.8‰） is narrow.Combined with the in-situ trace elements，in-situ sulfur isotopes and microstructure of colloidal pyrite，it is considered that the colloidal pyrite is of magmatic hydrothermal origin，which may be a close genetic relationship with the concealed granite porphyry in the Asiha gold deposit.Arsenic and Au in colloidal pyrite precipitated rapidly under the condition of sudden temperature drop are decoupled，and the micron size pyrite is the dominant factor controlling the enrichment of solid solution gold.
Bilihe gold deposit is a large low-temperature hydrothermal and porphyry gold metallogenic system in the northern margin of North China Craton，which is hosted in internal and external contact zone of granodiorite and surrounding pyroclastic rock.The mining area has appeared a sharp drop of resource reserves due to continuous mining work.In order to ensure the sustainable development of the mine and improve the utilization rate of gold ore resources，there has arisen a critical necessity to strengthen geochemical exploration of deepand peripheral resources in the mining area.The primary halo prospecting method directly takes rocks or ores as the research target，which is considered to be the most direct and effective deep prospecting method at present and has achieved good results in the exploration of gold deposits.This paper take the mining No.2 ore belt as the research taget and analyze various elements such as Au，Ag，Cu，Pb，W，Mo，Bi，As，Sb，Hg of the primary halo of boreholes.The characteristics of element content，element association and spatial distribution of primary halo in three boreholes of No.2 ore belt in Bilihe mining area have been studied to find effective geochemical prospecting indicators.The results show that the main indicator elements of gold mineralization in Bilihe mining area are Au，W，Mo，As，Sb and Hg.There are two groups of gold metallogenic indicator element associations in Bilihe mining area，namely，Au-W-Mo high-temperature element association and Au-As-Sb-Hg low-temperature element association.Au-W-Mo element association indicates high-grade gold mineralization，strong gold mineralization activity and large metallogenic scale，which can be used as the main prospecting indicator for high-temperature porphyry gold deposits in the mining area.Au-As-Sb-Hg element association indicate low-grade gold mineralization，relatively weak gold mineralization activity and limited metallogenic scale，which can be used as the main prospecting indicator for vein-type low-temperature hydrothermal gold deposits in the mining area.Weak gold mineralization information can be obtained by applying 10×10-9 gold content as the lower limit of primary halo anomaly of gold deposits.The distribution range of gold mineralization can be accurately determined by applying 100×10-9 gold content as the inner zone of primary halo anomaly of gold deposits.The inner anomaly range of primary halo delineated by this method is much larger than the distribution range of gold orebodies.Therefore，Using primary halo prospecting method for deep prediction and evaluation can effectively enlarge weak information of gold mineralization.
With the increasing attention on the environmental protection of resource development and the strict requirements for the discharge of waste rocks，tailings，waste residues and other wastes generated in resource development，it is particularly important to dispose these wastes.The mixed filling of waste rocks and tailings is the most effective way to solve the discharge of mine waste.Taking the underground filling of Gaofeng mine as an example，It is necessary to determine the optimal ratio of waste rock and tailings mixed filling materials.The particle size of tailings and waste rock were analyzed by laser method and sieve method.The chemical composition of waste rock and tailings was obtained by X-ray spectrometry.The orthogonal experiment with four factors and four levels was designed，and the range analysis of the experimental data was carried out.The primary and secondary factors affecting the strength of filling body，slurry bleeding rate and slurry slump were explored，and the filling material ratio that preliminarily met the requirements of the mine was obtained.The slurry concentration is 83%，the ash sand ratio is 0.25，the waste tail ratio is 1.5 and the amount of pumping agent is 0.5%.According to the experimental data，the quadratic polynomial regression model of 28 d filling body strength，slurry bleeding rate and slump was established.The theoretical value and experimental value of the regression model were compared and analyzed.It is found that the relative error is within a reasonable range，indicating that the model has certain reliability for the prediction of filling body performance.Multi-objective optimization Pareto solution set obtained based on NSGA-II algorithm.The mixture ratio of waste rock and tailings filling slurry with good performance and lowest cost was determined.The results are as follows：According to range analysis，The ratio of ash to sand has the greatest influence on the strength of filling body，and the influence of slurry concentration，waste tail ratio and pumping agent decreases in turn.The ash sand ratio has obvious control effect on the slurry bleeding rate，and the waste tail ratio，slurry concentration and pumping agent effect decrease in turn.The slurry concentration has the greatest influence on slump，and the influence of pumping agent，ash sand ratio and waste tail ratio decreases in turn.Without increasing the cost of additional materials，the proportion of waste rock can be appropriately increased to improve the strength of the filling body.The cost of filling material for the optimized scheme is reduced by 2.9% compared with the preliminary scheme determined by orthogonal test，the optimized filling ratio is slurry concentration 82.989%，ash sand ratio 0.240，waste tail ratio 1.419 and pumping agent 0.537%.
With the improvement of mineral processing technology，the amount of tailings in storage is increasing year by year，and the particle size of tailings is getting finer and finer.However，such tailings have poor permeability，good water holding performance，long consolidation time and low mechanical strength.Such tailings often have problems such as difficult drainage，slow deposition and poor stability in the process of dam-filling.In the complex climate and geographical environment，rainfall infiltration，water evaporation，repeated rise and fall of saturation line （that is，under the condition of dry-wet cycle），earthquake and so on will be encountered.These factors can not be ignored for the settlement of fine tailings pond.In order to help calculate the settlement distance of tailings deposit and guide ore drawing and tailings dam construction，the influence of dry-wet cycle and moisture content on the compression consolidation characteristics of tailings of a metal tailings pond in Hunan Province was studied.The tailings with water content of 10%，12%，14%，16% and 18% were subjected to 0~5 times of dehumidification-moisture absorption-dehumidification tests respectively，and rapid consolidation tests were carried out on the samples with the help of GZQ-1 automatic high-pressure consolidation instrument.The results show that：（1）Under the same conditions，the void ratio decreases with the increase of pressure.Without the dry-wet cycle，the void ratio of the sample at the optimum moisture content is the smallest，and the void ratio of natural moisture content，optimum moisture content and saturated moisture content changes in a U-shaped curve in turn.After the dry-wet cycle，the volume of tailings sample expands slightly，and the internal water-gas channel changes.After graded loading，the internal particles fill the pores，and finally the structure tends to be stable.（2）Under the same number of cycles，the compression coefficient increases with the increase of water content， Under the same moisture content，the compression coefficient changes in a “Λ” shape with the increase of the number of dry-wet cycles.The number of dry-wet cycles and moisture content can increase the compactness of tailings and reduce the compression coefficient by changing the bonding effect and capillary water pressure of tailings cement.（3）Without drying-wetting cycle，the con-solidation coefficient first rises and then decreases with the increase of water content. At the same moisture content，the change of consolidation coefficient is approximately M-shaped with the increase of the number of dry-wet cycles.The stress in the early cycle process is mainly dominated by capillary water pressure.When the particles move stably and the pore structure of tailings is fully developed，the stress is dominated by cohesive force and friction force.Through the above three points，we can understand the stress characteristics of tailings sand consolidation process，assist in calculating the settlement distance of tailings accumulation，and guide ore drawing and sub-dam construction.Monitoring the environmental temperature and precipitation，controlling the water content of tailings and the accumulation period of tailings can improve the economic benefit and stability of tailings dam.
With the depletion of shallow mineral resources and the implementation of the national environmental protection policy，the filling mining method has gradually become the preferred mining method for major mines.In order to study the influence of the tailings own characteristics on the performance of flocculation and settlement during the filling process，the influence of the tailings own physical characteristics on the settlement effect was investigated by conducting flocculation and settlement experiments on four different tailings at the same feeding concentration，flocculant type and dosage.The experimental results and regression analysis show that the specific gravity，median particle size and -200 mesh particle content of the tailing sand are not mono-tonically correlated with the settling velocity and bottom flow concentration，and there is no simple univariate correlation between them，and the fitted equations are not well fitted by non-linear regression.The median particle size of the tailing sand show a positive correlation with the settling velocity and the bottom flow concentration.The -200 mesh particle content is negatively correlated with the settling velocity and bottom flow concentration in the process of flocculation and settling，and the fit is high，which has a higher degree of influence on the settling effect.The single-factor correlation of specific gravity of tailings，median particle size with settling velocity and bottom flow concentration is low，and the regression equation of these three factors with settling velocity and bottom flow concentration is obtained by multiple linear regression using SPSS software，and the significance of these factors is further analyzed.For the influence degree of flocculation settling velocity of tailings mortar，-200 mesh particle content > median particle size > proportion of the tailings.For the influence degree of tailings bottom flow concentration，median particle size >-200 mesh particle con-tent > proportion of the tailings.
In order to meet the challenge of the high ground temperature environment of deep mining，realize the real simulation of the environment，and improve the high ground stress-high ground temperature coupling capability of the true triaxial test equipment，the research and development of the ground temperature simulation platform of the rock true triaxial test machine has been carried out. The exploration and establishment of three kinds of heating schemes for the ground temperature simulation platform are the six-sided heating rod heating scheme based on solid medium heat transfer，the ring heater heating scheme and the liquid heat transfer heating scheme based on liquid medium heat transfer. Through the establishment of a true triaxial high ground stress-high ground temperature coupled loading program evaluation system combining numerical simulation （COMSOL），coefficient of variation method （RSD） and ideal solution for multi-attribute decision-making problems （TOPSIS），comprehensive indicators for three heating programs evaluation and scheme optimization. In order to obtain the best test results close to reality，the five basic evaluations of the quality of the evaluation plan are the uniformity of heating on the rock surface，the heat dissipation from the outside of the pressurized rod，the average heating rate of the rock sample，the strain value of the pressurized plate and the economic cost index. The COMSOL Multiphysics simulation software was used to simulate three heating schemes. Through the coefficient of variation method，the simulated data were objectively assigned，and the corresponding index values ??were brought into the TOPSIS model for comprehensive evaluation. The evaluation results show that the comprehensive evaluation indexes of the three schemes of six-sided heating rod heating，ring heater heating，and liquid heat transfer heating are 0.4288，0.9447 and 0.5532，respectively. The heating method of the ring heater is consistent with a positive ideal solution. The closeness degree reaches 0.9447，which is the optimal decision after comprehensively considering the five indicators. This evaluation system combines theoretical methods，numerical calculations and numerical simulations，and provides a reliable theoretical basis and experimental basis for finding the optimal heating scheme for true triaxial test equipment. The instrumental research on the coupling capability of ground temperature is of guiding significance.
In order to quantitatively study the influence of the equipment layout on the cooling effect of the high-temperature driving roadway in the dual-pressure pumping mixed ventilation，the Fluent computational fluid dynamic（CFD）software was used to carry out a numerical simulation study on the ventilation cooling of the driving roadway.Firstly，the three-dimensional model of dual press-in mixed ventilation was established，and the boundary conditions and solver parameters of the model were set by Fluent software.Then，three groups of press-in air ducts 2 were set to conduct comparison experiments at different layout positions for numerical simulation.Finally，the temperature field distribution of the driving roadway under the action of dual-injection pumping and mixed ventilation and cooling was analyzed，and the temperature distribution law in the roadway was quantified when the pressure-in air duct 2 is arranged in different positions.The research results show that the dual-injection mixed ventilation can effectively treat the key treatment areas with the most active heat exchange within 50 m of the excavation roadway.The temperature field in the horizontal direction shows that the temperature on the pressure side of the tunnel from the outlet of the compressed air duct 2 is lower than that on the suction side，and the temperature on the suction side of the roadway is gradually lower after the air duct 1 is compressed. The temperature field of the roadway section shows that the temperature distribution at different heights of the roadway at different sections is different，and the temperature difference at different heights of the roadway is larger when it is close to the section of the forced air duct 2，the temperature in the upper and lower positions of the tunnel is lower and the temperature in the middle position is higher.The arrangement position of the press-in air duct 2 in the dual press-in mixed ventilation directly determines the temperature distribution in the roadway.When the press-in air duct 2 is arranged at 30 m from the driving surface，the temperature within 30 m of the driving roadway is stable at about 26 ℃.When the air inlet duct 2 is arranged at a distance of 50 m，although the temperature within 50 m of the driving roadway fluctuates by about 1 ℃，the overall value remains below 28 ℃ to meet the operation requirements.When the air duct 2 is arranged at 70 m away from the driving surface，the temperature fluctuation range in the driving roadway is relatively large and the temperature exceeds the limit in a wide range.At this time， the cooling effect of dual press-in mixed ventilation basically fails.The position of the press-in air duct 2 can be flexibly arranged under the appropriate conditions of the cooling and air supply parameters to meet the cooling requirements of long-distance roadways.The air temperature change law of the driving roadway obtained in the experiment in this paper can provide reference for the research of other ventilation cooling systems under similar conditions.
The sulpfur content of ores in an underground pyrrhotite is nearly 50%.Internal-caused fires are prone to happen in such mines because of ore spontaneous combustion，and the internal-caused fire has become a major hidden danger to the sofety production of mine enterprises.In the underground mine stopes，there are many complex factors affecting the internal-caused fire.It covers multiple levels of the situation about cause and effects of the fire in the stopes.Considering 9 influencing factors such as sulfur content and temperature of ore， the impact indicators，probabilities of spontaneous combustion and its results of the internal-caused fire in the typical stopes of the mine were statistically analyzed.Then a multi-level analysis index system for fire in the stopes was constructed，and the knowledge system of rough fuzzy set was established.The condition attribute of the model is the impact indicators of internal-caused fire，and the decision attribute of the model are consequences severity and judgement result of spontaneous combustion of internal-caused fire in the stopes.For the above two kinds of knowledge systems，the sample object sets of the stope is divided into classes by equivalence partitioning according to condition attributes and decision attributes.The classification quality of the conditional attribute set of the spontaneous combustion knowledge system and fire consequences knowledge system is 70% and 67% respectively.Then，the conditional attribute set is reduced by using the theory of variable precision rough fuzzy set.After a chain correlation decision-making analysis which contained the possibility of spontaneous combustion and the severity of the internal-caused fire consequences in the stopes，9 decision-making rules for spontaneous fire with a confidence level above 55% were obtained，and 5 decision-making rules for fire consequences in the stopes were also obtained with a confidence level above 50%.According to the cause-effect chain，the two classes of rules were merged and integrated，and 30 combination rules of the cause and effect of the internal-caused fire in the stopes were obtained.Examples show that this method can analyzes the problems scientifically and comprehensively，with uncertain probability of chain-related correlation levels such as internal-caused fire in the stopes.It can also provide guidance for mine analysis and response to fires in the stopes to ensure sofety production.At the same time，this method also reduces the probability of internal-caused fire in the stope of some mine enterprises.
Aiming at the controversial assignment of index weight in the evaluation method of spontaneous combustion tendency of traditional sulfide ores，a partial ordered set evaluation model for spontaneous combustion tendency of sulfide ores was established based on the partial ordered set theory of implied weight. Firstly，the low temperature oxidation weight gain rate，self-hot spot temperature and spontaneous ignition point temperature of sulfide ores were selected as the evaluation index set and the classification standard of spontaneous combustion tendency of sulfide ores was determined. Secondly，the data of the samples to be judged were collected，and the virtual samples were artificially constructed according to the grading standards. The weight order information of the evaluation indexes was obtained by using the information entropy theory，and the partial order matrix was constructed. Finally，Hasse matrix was obtained and Hasse graph was drawn，and the layer set information presented in the graph was analyzed to evaluate the spontaneous combustion tendency of sulfide ores. The example analysis results show that the evaluation model can effectively avoid the weighting dispute of the traditional evaluation method，the classification results are more precise，the evaluation results are accurate and reasonable，and has good robustness，which provide a new idea for optimizing the evaluation method of spontaneous combustion tendency of sulfide ores.
In order to effectively recover the tungsten and tin minerals in a fine mud in Guangxi，a centrifugal gravity separation-flotation desulfurization process test was carried out.The contents of WO3 and Sn in the fine mud are 0.52% and 0.31%，respectively. Among them，tungsten is mainly wolframite and scheelite，accounting for 47.69% and 39.42% respectively；tin mainly exists in the form of cassiterite，accounting for 75.48%，followed by tin in sulfide minerals，accounting for 17.42%.The -0.03 mm grain yield rate in the fine mud is 61.36%，and its WO3 and Sn metal content distribution rates are as high as 78.52% and 70.39%，respectively. Therefore，strengthening the recovery of fine-grained tungsten-tin minerals is the key of improving technical economic indexes of mineral precessing.A comparative test of reclaiming fine-grained tungsten and tin minerals by shaker gravity separation and centrifugal gravity separation was carried out，and it was found that the centrifugal concentrator equipment has superiority in the gravity separation and recovery of tungsten tin fine sludge.Detailed condition optimization experiments were carried out on the parameters of slurry feeding concentration，feeding time and drum speed that affect the separation effect of the centrifugal concentrator，and the appropriate technological conditions for the centrifugal gravity separation to recovery fine-grained tungsten and tin minerals were obtained.Further improve the grade of tungsten tin concentrate through flotation desulfurization test.The study used the combined process of centrifugal gravity separation and flotation desulfurization to carry out the whole process open circuit test，and obtained tungsten-tin concentrate with WO3，Sn grades of 19.46%，9.87%，and the recovery of 67.92% and 57.52%，respectively，realizing the effective recovery of fine-grained tungsten-tin minerals.
Gold has been widely used because of its easy forging and corrosion resistance，and it promotes the development of daily life，industry and global economy. Gold ore separation is mainly composed of raw ore crushing，grinding classification，flotation and concentration. The quality of grinding products is directly determined by the addition system of grinding medium，which affects the beneficiation index and the economic benefit of the concentrator. Grinding operation is an important part of gold recovery. The optimization of grinding medium system can effectively improve the quality of grinding products，and make more qualified fractions enter the flotation process，which is beneficial to the separation and enrichment of gold mines. There are some problems in the first-stage grinding workshop of Jiaojia gold mine，such as high unit ball consumption of ball mill，low grinding efficiency and unreasonable particle size composition of grinding products，which greatly affect the normal production situation and separation index of concentrator and lead to low economic benefits of mine. In order to solve the above problems，this paper optimized the grinding medium addition system of ball mill to improve the quality of grinding products. The mechanical properties of ore were determined and the particle size composition of ore was screened. Based on the mechanical properties of ore and the particle size distribution of grinding cycle products，the medium ratio of the recommended scheme was calculated by Duan's semi-theoretical formula of spherical diameter as Φ90∶Φ70∶Φ50∶Φ40∶Φ30=15∶25∶20∶15∶25. In addition，four groups of schemes，i.e.，field scheme，recommended scheme，oversize scheme and undersize scheme，were tested in laboratory grinding contrast test and grinding contrast test under different sand return ratio in a discontinuous Φ450×450 mm ball mill in laboratory. The yield of roughing grade，easy-to-select grade，optional grade and superfine grade were taken as evaluation indexes. Finally，the initial ball loading scheme was determined as follows：Φ90∶Φ70∶Φ50∶Φ40∶Φ30=15∶25∶20∶15∶25.The industrial test of 3# mill （MQG2736） in Jiaojia gold mine was started on October 26，2016. After the industrial test，the content of -0.074 mm in ore discharge of No.3 mill increased by 4.06%，the content of +0.30 mm decreased by 5.64%，and the processing capacity of No.3 mill increased by 6.42% during the industrial test period. This shows that the recommended ball ratio scheme is more suitable for increasing the content of middle easy-to-choose fraction and reducing the content of over-crushed fraction than before the industrial test，which can effectively increase the output per hour，and has certain reference significance for similar mines.
The ore yield is an important standard for mining enterprises to formulate production plans.At present，the vast majority of underground mines estimate ore yield by manually counting the number of ore carrying vehicles.The measurement error is large，which seriously affects the enterprises to formulate production plans.In order to solve the problem of large measurement error and improve the accuracy of ore yield estimation，a set of underground machine on-board ore yield measurement system based on image recognition was designed and developed in this paper.In this paper，the method of image recognition combined with density model modeling was used to form a volume model through three-dimensional reconstruction of ore pile image information，and an image feature density library was built to form a complete set of underground machine on-board ore quantity measurement system.The system collects the internal image of the locomotive ore bucket through the depth camera，then extracts the feature information of the image and compares it with the image feature density library to obtain the density of the ore in the current ore bucket， and then generates a volume model from the three-dimensional reconstruction of the image to calculate the volume of the ore pile，and calculates the product of the volume and density of the ore pile to obtain the weight of the ore pile.The field repeated tests show that the metering system operates stably and reliably，and the calculation error of locomotive ore load is less than 5%.It solves the problem of ore yield estimation in mining enterprises，improves the calculation accuracy of ore yield，and brings detailed and reliable data for enterprises to formulate production plans.
As a precious metal material widely used in electronic packaging，jewelry and other industries，the performance improvement of gold-based materials has always been the focus of research，and micro-alloying technology，as a new metallurgical technology that can optimize metal performance，is widely used in the application and development of precious metal materials. From the perspective of microstructure and atomic morphology，we discuss the mechanism principle of microalloying technology of gold-based materials.From the point of microstructure，the reinforcement principle of micro-alloying is expounded from the perspective of micro-organization such as solid-solute reinforcement，second-phase reinforcement and fine crystal rein-forcement.The development process and present situation of gold microalloying technology from theoretical research to application experiment are introduced in detail.The performance differences of gold-based materials under the action of different trace elements were compared comprehensively.At present，rare earth elements have both good solid-soluble reinforcement effect，second reinforcement effect and fine crystal reinforcement effect，which are the main trace elements to optimizing the performance of gold-based materials.Finally，looking forward to the application prospect and research direction of micro-alloyed gold-based materials，we should establish a scientific model that can scientifically predict the micro-form and performance of gold-based materials on the basis of more in-depth and systematic research，and obtain the best complement element type and ratio，so as to improve the research and development efficiency of new gold-based materials.
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