Through discussing the application effect of IP sounding method in gold deposit，combining with the result of IP intermediate gradient method,we evaluated IP anomalies by the IP sounding method in anomalous areas.The position and depth of mines could be estimated by exploration results，and the sounding results offered scientific bases for the next drilling work.This study adopted three -pole IP sounding method,some obvious IP anomalies had been obtained on the sectionⅠ,Ⅱand Ⅳ.Based on the analyzing and interpreting results of IP anomalies from the apparent amplitude frequency and geological condition,the depth of mines had been forecasted on undiscovered section Ⅱ and Ⅳ .According to comparison of the prospecting results with the known drills,the prospecting results were credible.The sounding results provided reference for further exploration of Liling gold mine,and this investigation method could offer scientific bases for the next drilling work.
Mulutang gold deposit is located in the holding location of Ailaoshan and Tengtiaojiang fault,the fracture is general development in this area,which provides a good channel and place for enrichment of gold.The magmatic activity is strong in this area,which has the characteristics of multi-phase and multi-stage acitivities,and undergo three major magmatic activity periods,inclulding Lvliang,Variscan and Indosinian period,also provides sufficient material source and thermal power for mineralization.We think that pyrite,arsenopyrite and silicification alteration are related to gold mineralization by summarizing geological characteristics and wall rock alteration of the deposit,we infer that genesis is structure altered rock type and secondary oxidized.In addition,we delineat favorable abnormal area by geophysical and geochemical explorating,and suggest that this area has better prospecting.
Cuijia gold mine is located in the north-east segment of Lingbei-Shuangmuding fracture in Zhaoyuan-Laizhou gold belt,16 veins have been discovered in the area,among them,1,10 and 13 veins contain industrial orebody. Through analysis of the regional geological conditions,we think that the initial source bed,containing-ore heat body and structure are the main ore-controlling factors in gold mineralization.This area commonly develop wallrock alteration,mainly including quartz,pyrite and sericite alteration,they are closely related with gold mineralization. According to the output characteristics and spatial -temporal distribution of the deposit,we infer that Cuijia gold mine belongs to medium temperature hydrothermal filling type gold deposit.Based on these studies,we optimize four exploration target areas,among them,the depth and periphery of 1 and 10 veins have good prospecting of forming medium-scale gold deposit,it is worthwhile to conduct further exploration work.
Miantian gold field,which located in the eastern part of Jilin Province,is a quartz vein and fracture altered zone type deposit.Structure development in this area provides favorable environment for gold enrichment.Prospecting marks and metallogenic prediction are summed up based on the analyses of geological characteristics,ore deposit types and mineralization.We suggest that there may be large deposits in this area,it is worth to increasing the geological prospecting efforts in the future.
Based on the studies of the geometric style,assemblage and deformation characteristics of the Machaoying fault zone,we revealed that the fault has undergone at least two deformation stages:ductile thrusting and brittle faulting.The brittle fracture,which took place later than the ductile deformation,closely related to the ore genesis,gold molybdenum deposits were directly controlled by the brittle fracture of Machaoying fault.The ore veins were mainly hosted in shear zones and extensional structures.The ore-bearing hydrothermal fluids ascended along the main fault zone and the fault was regional ore-controlling structure.The varieties of secondary faults and rock micro-fractured cracks were both good ore-hosting structure.
Shenkeng mine area is located in the north-east of Yunkai metallogenic belt in Guangdong Province,the orebody is strictly controlled by structure.The No.1 vein extend length,has large scale.The multi-vatiate statis analysis shows that the geochemical element combination of No.1 vein is Au,As,Sb,Ag,Pb,besides Au is metallogenic element,the indicate significance of As,Sb,Ag,Pb for orebody is good.According to the results of factor analysis,the front halos element Ba and rear halos element Sn appear the phenomenon of superimposed combination,we should pay more attention to deep prospecting.
Accidents of hanging wall rock collapse,caving,sinking spalling and roof-fall which caused by unstable wall rock frequently occur in mining process of Hubazhuang gold mine.This also increases loss rate and dilution rate.We formulate a shallow hole mining method of plate removed on the hanging wall fracture zone and layered culling and follow -up recovery on the footwall ore.This method effectively solves the potential danger of surrounding rock instability,improves the mining efficiency,reduces the dilution rate and loss rate,gains better economic benefits and social benefits,it could be applied in the similar mine.
Based on the application of the false bottom cementing filling in Jiaojia gold mine,we introduce its technology characteristics and application conditions in detail,compare the advantages and disadvantages between the traditional artificial bottom and the bottom of cemented filling.The results show that the false bottom cementing filling is a simple method,it can also solve the problems of large labor intensity and low efficiency caused by the traditional artificial bottom.This provides security for the development of enterprises and could be a good reference for similar mine.
Through inspecting and analyzing the mineralogy and ore grinding process,the old production process was merged into the new system in Hainan Shandong gold Mining Co.，Ltd.It had important effect that was optimizing grinding，simplifying the process，reducing energy consumption to realize energy saving and potential.At the same time，we improved the recycling rate to 13.68% and increased economic efficiency by merging personnel and strengthening the gravity dressing.
Pressure leaching method，which is an effective method of pretreatment in gold ore or concentrate with sulfur and arsenic，has many advantages：shorten the process，improve leaching rate,not produce the sulfur dioxide. The main reactions of sulfide，iron and arsenic compounds in high temperature oxidation include three approaches：the full oxidation of sulfur to be sulfide or sulfate，divalent iron during the reaction to be ferric，arsenic to be arsenate. As the decreasing resources of easy ore processing，pressure leaching method has been used more and more widely in industrial applications while the research of leaching mechanism is relatively less.We reviewed the chemical reactions of arsenic，sulfur and iron in the pressure leaching process.
In recent years,the basic dyes,which are commonly used in the traditional photometry,have been widely used in catalytic spectrophotometry of precious metals.The method is simple,with readily available reagents and high sensitivity determination in precious metals,is an analysis method with large development space and application prospects.We describe the principle and the method operation of basic dye catalytic spectrophotometric method in precious metal determination,review a variety of catalyst system and their application status which had been established and used to determine precious metal.We also summarize the advantages and shortcomings of the method and give an outlook to its application prospects.
In recent years,as all kinds of new technologies were applied in the gold prospecting area,more and more geochemical samples requested more accurate measurement method for determination of a weak anomalies. We took effective measures of adding ascorbic acid,increasing solution concentration,bringing a kind technique of seal completely to improve measuring methods of trace gold with the foam plastic adsorption-graphite furnace.Furthermore, it reduced the method detection limit and improved accurate precision of low content geochemical samples.These methods could improve the production efficiency,reduce cost,and injury to persons,achieve good results.
The stratum is complex in Baoxinggou gold mine,and the rocks suffer intense weathering and alteration generally,therefore,the stratum hole wall is easy to be instability in the process of drilling construction,leading to collapse and block out,and the protection of the borehole wall is difficult,so folder and underground drilling accidents usually occur.Taking ZK0702 drilling as an example,we introduce the main problems and construction difficulties encountered in the process of construction.Through on-site practice,we adopt combined treatment process including hitting,anti,expansion and fishing,using solid-free fluid（PAB）to protect hole wall.Finally,we successfully avoid the drilling accident,and propose specific measures to resolve and prevent accidents,it can provide a reference for the next construction.
Due to the impact of structure,the stratum in Phoenix mountain is strongly broken,loose and of poor cementation, this cause difficult for into the hole and protect wall.Through research,we find that there are multi-layers siliceous slate and feldspar quartzite of uniform thickness in the area.The layers,which have high silica content, dense hard structure weakly abrasive,are typical hard slip layers.Meanwhile,the formation of instability still exist in multi-carbonaceous slate,water loose,unstable hole wall,these cause difficult for drilling construction.Through multiple construction practice,we finally resolve the drilling problem by using casing wall,reasonably choicing and grinding diamond bit,and using the technical process of solid-free fluid PAB wall.It is worth application for similar mine.
Groundwater is the main water source producing borehole water gushing in the research area,research shows that groundwater resources are rich in this mine and mainly come from atmospheric precipitation.The development of fault in this mine constitute the gushing water channel,it provide condition for gushing water of main shaft.Through comparative analysis,combined with the shaft geology of the mine,we select hydrostatic throw residue grouting sealing and after-wall grouting cut-off water as the management program of borehole water gushing.Based on this,we describe the construction process,main technical parameters and drainage problems of gushing water management.After the shaft gushing water and submergence,we can block water effectively and complete shaft excavation puzzle by using the methods of build pulp pad and drilling grouting.
In order to solve the problems in the decentralization port of cement sand storage of large amount of dust production and serious environmental pollution in Wangershan gold mine,we use the exhaust ventilation method to carry out dust transformation of cement silo.By increasing local fan ventilation,we pump the dust generated by discharge port to the surface,this can prevent excessive dust,and improve underground working environment. Through transforming the system of removal dust,the amount of dust significantly reduce in the mine area,at the same time,it provide a good working environment for staff,and deserve reference for similar mine.
Trough introducing the definition and relation of several commonly coordinate system in measurement of geology exploration,we expound the conversion method among independent coordinate system,54 Beijing coordinate system,80 Xi’an coordinate system,WGS84 and 2000 National geodetic coordinate system,and their practical application. We analyze the development trend of the earth coordinate system,which shows that three -dimensional geocentric coordinate system will replace two-dimensional reference center coordinate system,multi-level network diagram will replace scale map.
By introducing the progress of construction audit in Jiaojia gold mine,we point out the basis of project audit,summarize the main audit methods and their scope,this can provide a reference for similar mines to carry out project audit work.At the same time,it further explain the importance and necessity of construction audit in metal mine.Jiaojia gold mine mainly use comprehensive audit,whoes advantage is able to ensure the accuracy of project cost better than other methods.Through strengthening the audit work of construction funds,developing a more comprehensive audit system,Jiaojia gold mine obtain significant economic benefits,saving a lot of funds.
Geological data base of Sanshandao gold mine was established using the international mining software Surpac.The three-dimensional visualization of the underground space such as ore body,fault,sinking and driving engineering and so on of Sanshandao gold mine were realized，which promoted the digital mining development of Sanshandao gold mine.The modeling of the prospecting,ore and other related geologic body,mining engineering system were synthesized by three- dimensional,which improved the technical capacity and the management level of mining enterprises.At the same time,the economic efficiency of the mine was improved by establishing solid model,it should be widely applied.
In recent years,with the development of science and technology,the equipment of mine is improved significantly, and the digital construction is deepening.Digital information technology not only change production process and organizational management of the traditional mine,but also greatly improve the production efficiency and safety level of mine,it lay solid foundation for sustainable development of the mine.In order to maintain stable operation of the information system in mine,based on the summary and analysis of situation and status quo of information operation and maintenance work in Jiaojia gold mine,we point out the deficiencecies of information system operation and maintenance in the mine,propose ITIL-based management of information operation and maintenance. The program achieve good implementation results in Jiaojia gold mine,it is worth learning for similar mine.
In view of the request of the wireless communication and personnel/equipment localization in the underground mine,taking Jiuyang mine as an example,we introduce the current advanced technique that is WiFi （Wireless Fidelity） technology in combination with RFID （Radio Frequency Identification） technology,a new technique to solve the difficulties in wireless communication and personnel/equipment localization of underground mine.This technology can not only meet the demands of mobile office within the scope of mining area,but also realize the function of VOIP,which is very helpful for the safety supervision,communication,as well as scheduling. The scene test indicates that the performance of this system is stable and can satisfy safety production request of the mine.
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