Jiajika lithium deposit is a superlarge deposit in Kangding County of Sichuan Province，and it is one of the most abundant area of lithium mineral resources in China.The chemical composition of biotite in two-mica granite were analyzed by electron microprobe，and the physical and chemical conditions（such as temperature，pressure，oxygen fugacity） of two-mica granite bodies were mainly studied.The results of electron microprobe analysis show that the biotites in Jiajika two-mica granite belong to oxybiotite，and its specific type is siderophyllite.The range of w（Fe2 +）/w（Fe2 ++Mg） ratio of biotite is small，indicating that the biotite is primary bio- tite，and it is not altered by later stage reconstruction，and it can be used to estimate its physical and chemical conditions of rock formation.According to the calculation of geochemical composition of biotite，the biotite was formed under the condition of low oxygen fugacity，the crystallization temperature of biotite is between 471～541 ℃，the pressure is between 432.21～564.86 MPa.The geochemical analysis of biotite also shows that Jiajika two-mica granite belongs to aluminum granite（including collision type and S-type granite），and its formation is mainly related to crustal magma.
The metamorphic quartz sandstones in the Ganzi-Litang suture zone experience low grade of metamorphism，no fossil samples were found during the field work.The sedimentary succession was deposited on the coastal and shallow sea environments.Ages of detrital zircons from the metamorphic quartz sandstones have a population ranging mainly from 3 264 to 495 Ma，yield five U-Pb age clusters of 544~495 Ma，1 000~730 Ma，1 220~1 050 Ma，1 563~1 367 Ma and 1 761~1 648 Ma，beside three old Archean zircon grains，therefore，the rocks have maximum depositional ages of 495 Ma.Compared with the detrital zircons histogram feature and stratigraphic assemblage characteristics from adjacent regions，the data suggests that the zircon grains have very complicated sources，but mainly from the western margin of the Yangtze Block.
The spatial distribution range of mineralization zone is larger than that of gold orebody，and it’s easier to be identified and mapped.Therefore，the study of mineralization alteration zone plays an important role in the exploration practice of gold deposits.Based on the study of the northern Shiquan-Hanyin gold belt in south Qinling，the characteristics of mineralized and altered minerals related to gold mineralization was analyzed and classified，meanwhile，combined with Au element chemical analysis and electronic probe test results， the obvious prospecting criteria of the deposit was determined.The study shows that the main prospecting indicators related to gold mineralization are as follows：①limonites which are fine aggregate，small vein or in the shape of lenticular，always distribute crookedly along the crumpled schistosity plane；②pyrites which are filiform or like a wire forming subhedral or xenomorphic aggregate，distribute along schistosity plane and develop small gentle fold or small angular fold；③quartz veins which have color of smoky grey and are in shape of lenticular or small veins，have xenomorphic granular structure and wavy extinction under the microscope；④biotite phenocrysts and garnet phenocrysts.
As a representative of Shuikoushan lead-zinc polymetallic orefield，Au-Ag polymetallic deposit in Kangjiawan is characterized by Au-Ag ores concentrated.Analysis of how Au and Ag are reserved and how they are related to evolution of mineralization is conducted，by using petrographic microscope and EMPA.Three mineralization processes are figured out，which are，formed by hydrothermal solution，Arsenopyrite-pyrite-quartz stage，zinc-lead sulfide stage，and quartz-calcite，respectively.Concentration of Au and Ag occurred at the zinc-lead sulfide stage.Au exist independently as a form of Au-Ag ores，except some of which enter the crystal lattices of iron pyrite and galenite by isomorphism and few of which exist in the form of Au-Ag-Te ores.Ag mainly exists in the form of Ag-Cu-Zn-Fe-Sb-As-S ores，in addition there are Ag-Sb-S series and Ag-Cu-Sb-As-S series of minerals.
Yuhengtang gold deposit is located in the transition zone between Yangtze platform and south China fold system，in the junction of the middle of Xuefeng arcuate tectonic metallogenic belt and Baimashan-Longshan EW trending tectonic uplift belt.The strata exposed in the gold deposit are the Wuqiangxi Formation of Upper Proterozoic Banxi Group.The field geological work and indoor test analysis showed that gold ores mainly distributes in the first strata of Wuqiangxi Formation.The occurrence and characteristics of ore veins subject to the control of NE trend ore-controlling fracture and a series of NW trend secondary ore-bearing fracture which has multi-stage activity.The main alteration were pyritization and arsenopyrition.By analyzing the geological characteristics，metallogenic conditions，ore-controlling factors，metallogenic regularities and prospecting signs，it proposes that prospecting potential in the deep part of the main vein，in the junction of NW trend secondary vein and the first strata of Wuqiangxi Formation in the south east area is great，and the resource reserves of Yuhengtang gold deposit may be enhance.
For the underground metal mine production planning optimization in sublevel caving method，the mixed integer programming model was built with the function of maximizing the net present value （NPV） constraint condition of the production capacity and space order to determine the stope mining sequence.The metal price changes not only affect the planning result，but also it is difficult to determine the risk of plan and can bring great economic losses in mining enterprises.According to the distribution of metal history price，using the geometric Brownian motion（GBM） model to predict 15 metal price trend curve，the production plan for different price trend curve was gutted by solving the mixed integer programming model，finally the more metal prices curve was predicted by using the GBM model again and analysis the net present value.Upside potential，downside risk，conditional value at risk （CVaR） and the value at risk （VaR） of different planning also was analyzed.Finally by using entropy method to determine the price of metal high yield under uncertainty and risk of small production plan.Verification by the concrete example that the method is scientific and feasible，can reduce the risk of the price when use traditional manual method to prepare production plan，realize low risk high efficiency mining resources，and has an important significance for actual production of the mine.
Recovery valuable metal from cyanide tailing by flotation is difficulty.The main method currently adopted is to remove cyanide from tailing by adding oxidizing agents and then adding collector to recovery the objective minerals.However，there are some problems in the process，such as high cost of reagent，cyanide unable to reuse，and secondary oxidation of mineral surface.Taking cyanide tailings which contain high grade of lead and zinc in Shandong Province as research object，the flotation recovery of cyanide tailings was studied by flotation test and closed circuit test under the condition of non-cyanide removal，cyanide barren solution was used as flotation water.It was proved that valuable metals in the cyanide tailing can be recovery by flotation under the condition of non-cyanide removal.The cyanide tailing was processed to obtain qualified Pb concentrate with grade of 56.61% and recovery rate of 89.04%，Zn concentrate with grade of 32.6% and recovery rate of 74.5%.SEM microscopic study shows that the surface of copper mineral is insulated by a thin layer of galena，which changes the interface properties of chalcopyrite，and makes surface characteristics of copper minerals tend to interfacial properties of galena，leading to the majority of copper minerals entering into lead concentrates.
In order to solve the problem of high dosage，unreasonable action time and low flotation recovery rate of a gold mine dressing plant in Qinghai Province，on the basis of the original flotation process，the experiment was carried out on the optimization of the flotation reagent dosing point and dosage.The results showed that by means of the optimization test of the sodium carbonate，copper sulfate regulator and ammonium dibutyl dithiophosphate collector dosing point，the sodium carbonate dosing point was removed from grading pump pool to agitation tank，copper sulphate and ammonium dibutyl dithiophosphate was removed from agitation tank to grading pump pool，the degree of mineralization was good，foam was seed，foam layer became stability.By means of the optimization of flotation reagent dosage test，the sodium carbonate，copper sulphate and ammonium dibutyl dithiophosphate consumption reduced 1.0，0.05 and 0.035 kg/t respectively.Process parameters were improved，the concentrate yield and recovery rate increased by 0.31% and 3.53% respectively.Compared with the original flotation reagent dosing points and dosages，the floating indexs were improved greatly and the flotation regent consumptions are significantly reduced.
The selection of mining method is one of the most important production and management decisions to mining enterprises.In order to ensure the decision-making results are scientific and effective，based on the basic theory of game theory and TOPSIS method，using the analytic hierarchy process（AHP） and the information entropy method to calculate the weights of evaluation indexes respectively，and using the game theory aggregation model to weight and aggregate the results of the single weight calculation methods to get the comprehensive weights of the evaluation indexs.And then，a TOPSIS model based on relative entropy was used to calculate the relative closeness of each mining method.According to the four kinds of mining methods in a mine，based on the AHP principles to select 10 key indicators from the economic，technical and security，which including the cost of mining and filling，the ore recovery rate and the ore dilution rate and so on，to establish the comprehensive evaluation index system of mining method selection.The relative closeness degree of the four kinds of mining methods was calculated，the results show that the relative closeness degrees of the four optional mining methods are 0.420，0.401，0.492，0.115，and the third is the optional.The conclusion is consistent with the actual situation of mine production，which proves that the method is scientific and effective.
In order to realize scientific and reasonable ore drawing control and management of block caving method in the new period，a new integration system of block caving ore drawing optimization control and intellgent management was developed by using C++ programming language and hoops visual package.The system construction steps are as follows：①Analyzed the business requirements of block caving ore drawing optimization control and intelligent management system，and determined the system software requirements.②Proposed the software architecture of hierarchical platform and plug-in，the plug-in was used as the plug-in type of the system，and designed the plug-in interface.③Analyzed the characteristics of the data which drawing process related to，determined the basic design requirements of drawing data model of block caving mine and data management mode，designed the data structure of the system，SQLite database was used to store and manage data.④Functional structure of the system was designed according to the requirements，a set of software and hardware application system was developed，which based on the simulation analysis of mine rock flow and resource model data，and cored in economic evaluation of mineral resources exploitation，production scheduling optimization，and the intelligent management of the production process.The mine application example shows that the system can meet the demands of drawing control and intelligent management system of block caving mining enterprises，and has a good application prospects.
Solid waste rock cemented filling body is the key load bearing structure of ensuring safety mining of mines，in order to investigate its actual load bearing damage and failure process，the acoustic emission tests of four groups of cemented filling specimens with different coarse aggregate contents were carried out under uniaxial compression and cyclic loading on the RMT-150C rock mechanics test system.Results showed that four groups of samples has significant Kaiser effect under cyclic loading，and the number of acoustic emission events of three groups of specimens containing block stones was more abundant，and 152%，225% and 300% of pure tailings were reached before the peak stress.At the same time，the acoustic emission probability density equations of four groups of cemented filling body with different block stone contents were obtained by using the correlation between acoustic emission probability density and stress level.Quantitative analysis of bearing damage process of cemented backfill by acoustic emission parameters was carried out by acoustic emission probability density fuction.It can be seen that the addition of ballast can effectively slow down and inhibit pre-injury by contrast damage variable-stress level curve，when the ballast content is 20%，the best results can be achieved.
In order to solve the bottleneck problem and make a steel enterprise develop better，firstly，the internal and external surroundings of energy saving and environmental protection industry were analyzed，four elements about the research object were obtained by SWOT analysis method.Next，by using fuzzy analytic hierarchy process，qualitative evaluation was conducted and strategic quadrilateral was built.The result was calculated by weighted scores with sorting vector and Delphi.The intensity was 2.987，the disadvantage was 2.026，the chance was 3.583，the threat was 2.733，the strategic azimuth was 0.609，and the intensity coefficient ρ was 0.689.The results of energy saving and environmental protection analyze show that，the advantages outweigh the disadvantages，and the opportunities outweigh the challenges.The enterprise should make full use of the advantages，seize the opportunity，and adopt the strategy of exploiting strength and developing strength.
A method of inductively coupled plasma-atomic emission spectrometry with fire assay preconcentration is was used in determining gold and silver in gold-loaded carbon by saltpeter ingredients.Through method designation and condition testing，the best determination conditions for sample weight and acid dosage were settled.The relative standard deviation of this method is 0.46%~0.99% for gold and 0.63%~1.77% for silver，and the recovery ratio is between 99.2%~101.3% for gold and 99.5%~101.5% for silver when reference materials were added.The results of this method are consistent with the results measured by classical fire assay method for gold and flame atomic absorption spectrometry method for silver.The method has the advantages of being quick and sensitive，achieving the gold-silver determination together and with the stability determination result.It also reduces the sample roasting step and the analysis time，saves labor costs and improves the efficiency for the analysis of large quantities of gold-loaded carbon samples.
In order to make an environmental agents completely replacing highly toxic sodium cyanide for gold smelting and solve the problem of the environmental pollution of cyanide waste water and waste residue during the process of extracting gold with cyanide，the adaptability of an environmental agent to different gold types and the adsorption selectivity of activated carbon to gold in the liquid of the environmental agent have been studied.The results show that the effect of the environmental agent on leaching gold from acid leaching residue and high sulphur gold ore is equivalent to that of cyanide，and the leaching rate of vulcanization gold ore is faster than the cyanide，and the amount of environmental agent and mineral type are related to the leaching process.The adsorption of gold and silver in the leaching precious liquid of environmental agent by activated carbon is selective，the pH value of the liquid should be kept at 10.0 to 10.5 to get better adsorption results.Due to the analysis method is not perfect，it is impossible to reveal the relationship between the consumption of agent during leaching process and the mineral types，and the change of concentration and composition before and after the adsorption of activated carbon can not be detected.Based on the study of pharmaceutical analysis method，the main task of current research is to reveal the gold dissolution mechanism of environmental agents and the interaction between the environmental protection agents and minerals.
The effect of pH value，temperature，diammonium hydrogen phosphate concentration，feeding ways and precipitate time on the selective precipitation of iron from bio-oxidation liquid of gold ore was studied，by taking bio-oxidation liquid of gold extraction as the research object and diammonium hydrogen phosphate as precipitant.The precipitation rate of iron reached 95.2% and the residual rate of arsenic in the bio-oxidation liquid was 93.6% under the conditions：flow the bio-oxidation liquid and 0.2 g/mL diammonium hydrogen phosphate at the same time，and adjust the pH value to 2.0 by adjust the flow rate of diammonium hydrogen phosphate，precipitate at 60 ℃ for 2.5 hours.XRD spectrum confirmed the precipitation of iron was mainly composed of ferric phosphate and ferrous dihydrogen phosphate.The results confirmed the selective precipitation of iron from bio-oxidation liquid，which can provide theoretic guidance to recovery valuable components such as iron and arsenic from bio-oxidation liquid.
The resource utilization of primary lead smelting slag is an effective method to solve the problem of the land occupation and destruction of the ecological environment due to the pile of primary lead smelting slag in the open air.This paper firstly introduced the origin and physical-chemical properties of primary lead smelting slag，then，it summarized the research status and application of the resource utilization of lead smelting slag at home and abroad and analyzed the difficulties and shortcomings of the utilization of lead smelting slag from the aspects of recycling elements in lead smelting slag，preparing building materials and cementitious materials for mine filling. Domestic and foreign studies show that the lead smelting slag has less ways of utilization compare to other types of slag and the research on secondary pollution after its utilization is not deep enough.Therefore，improving the smelting process to increase the recovery rate of valuable elements and widening utilization ways and forming proven techniques are prerequisites for large-scale resource utilization of lead smelting slag，meanwhile，it is necessary to carry out researches on the immobilization of harmful elements to confirm that the harmful elements in lead smelting slag can be prevented and controlled，so that the foundation can be laid for the resource utilization and safety and environmental disposal of lead smelting slag.
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