Fault is the main ore-controlling structure of hydrothermal type deposit.The Zhaoyuan-Pingdu fault zone has experienced tectonic evolution process of brittle-ductile to ductile-brittle，becoming the main ore-controlling structure in Jiaodong area，and showed metallogenic belts controlled by the regional tectonic，ore field tectonics control ore deposit，structure of mining area to control the ore body，intense deformation fractured zone controlled the veins.the ore-forming materials are mainly derived from the deep source，even from the core mantle boundary.Under the control of temperature，pressure and other physical and chemical conditions，the ore-bearing fluid of deep-seated is gradually moving upward through the multiple evolution of the mantle plume.When reached fracture strength will lead to the hydraulic fracturing，and rapid penetration to favorable structural sites，such as ductile brittle to brittle ductile shear zone，intrusive mass inside and outside contact zone，dense structure of fracture belt，a variety of vein rock and wall rock contact zone gathering mineralization.The comparison study between the Beibo and the Laixi gold mine once again confirms this understanding，which has a good reference for guiding the deep geological prospecting.
Earthquakes mainly include tectonic and volcanic earthquakes.More and more evidences show that the tectonic earthquake is a kind of hidden explosion process.They usually have close relation with metallogenic process as volcanic eruption.Earthquake process is a phase transition process of subsurface supercritical fluid，which is usually shown as dephasing explosion.The origin of the cryptoexplosion breccias type deposit，the porphyry type deposit and the shallow hydrothermal type deposit is closely related to the earthquake.Geophysical exploration after the Wenchuan earthquake found that there likely exist original magma chambers and middle magma chamber in the deep，the invasion in this earthquake process makes the shallow enrichment of phosphorus，sulfur，iron，manganese and other elements.Many studies and examples illustrate that the earthquake is an underground hidden explosion and ore-forming process triggered by fault motion.The research on the characteristics of the seismic fracture and the physical characteristics of the associated alteration minerals are of guiding significance for the exploration of mineral deposits.
The theory of primary halo superposition solved the problem of inverse zoning in primary halo，which made the characteristics of reverse zoning becoming an important indicator of predicting deep blind ore.According to the theory of structural superimposed halo，the blind method of primary superimposed halo was developed to structural superimposed halo.The advantages of structural superimposed halo method are shown in the following aspects：the information of blind ore is enhanced，the workload of sample collection，processing and analyasis is obviously reduced，and the accuracy of ore prediction is higher.The blind method of structural superimposed halo has been successfully applied in more than 80 gold and nonferrous metal mines to the prediction of deep blind ore deposits，and achieved remarkable results.
Mawu gold deposit is a medium-sized fine disseminated gold deposit discovered in recent years，located in western segment of Western Qinling Li-Min metallogenic belt.The orebody is controlled by NWW trending faults，with the wall rocks consisting of phyllite and limestone in Hejiadian Group of Middle Devonian.The shear dynamic system is the leading factor of metallogenic structure in Mawu gold deposit，the secondary ductile-brittle shear structure of the deposit controlled the occurrence of gold mineralization alteration zones and the orebody.The ductile shear deformation and metamorphism characteristics of the strata and rocks are very typical.The source bed，fluid nature and origin，orebody morphology and ore types were reflected the characteristics of ductile shear zone type gold deposit.Under the combined effect of trinity“gold-rich strata，shear zone，magmatic activity”，formed low temperature micro-disseminated-type deposits.The orebody was eroded to the middle position and downwards，there was still some scale extends to the deep.
Huashugou gold mine was found，and the new understanding of gold mineralization was put forward basis on the geological survey in four 1/50000 regional map of Chahar right Qianqi，etc，by using the geochemical samples exploration，geological mapping and the comprehensive prospecting methods.Field geological study found that NE and nearly EW trend faults control the distribution of the abnormal faults and the outspread of the surface structure alteration belt and iron manganese ore body in the mining area.The surrounding rock and mineralization alteration are mainly silicide，potassium，sericitization and along the fissure filling iron manganese ore and limonite.Selecting the prospecting target area by comprehensive prospecting method，Huashugou anomaly area were reduced from 28.8 km2 to 3.6 km2，help to better looking for gold deposit.By using stream sediment and soil measurement method，anomaly elements were tested，and according to the enrichment coefficient，the results showed that Ag，Pb，Zn，As，Sb，W，Bi，Mo，etc.，has strong enrichment in Huashugou groove rock，and closely associated with mineralization，its surrounding rock，the Jining Group are enrich and strong enrich in Ag，Pb，Au，Cu，As，Sb，W，Mo，etc.，show that magma activity provides a ore-bearing hydrothermal mineralization，and hydrothermal metasomatic with surrounding rock，causing much metals such as gold and silver enrichment in the favourable area.Combining 1/10000 geological mapping methods and soil measuring，further anomaly examination and evaluation was conducted，found multiple ore sample content with cutoff grade，obvious abnormal thick concentrated heart and zoning.The implementation of exploratory trench engineering expose and mark out 2 gold orebodies，the distribution feature，composition and ore-controlling factors have been identified，indicating that the area has good ore prospects.
San’guanmiao gold deposit，obviously controlled by fault structure，is located in the thrust-nappe tectonic belt of the northern block of Southern Qinling，in the tectonic len between the Zhen’an-Banyanzhen fault and its south branch fault.The host strata of the deposit is the Yaolinghe Formation of the Qingbaikou System.With the exploration and research carried out on the gold deposit by the authoer since 2014，the scale of the deposit was expended，the prospecting direction was pointed out.In this paper，the geological characteristics of San’guanmiao gold deposit are systematically stated from six aspect：the ore body characteristics，the host strata and lithology，the relationships between tectonic activity and mineralization，the relationship between magmatism and mineralization，the ore characteristics，the occurrence of gold.The main gold-bearing minerals is arsenopyrite.The native gold mainly distributes between non-metallic minerals and arsenopyrite particles，between two non-metallic mineral particles，between two arsenopyrite particles.The mainly occurrence of the native gold is single gold.The native gold particles is flaky，granular，grain liked and dendritic.According to the research of the geochemical characteristics of primary halos，the characteristics and the law are summarized systematically.The front halo elements（As-Sb-Hg） with strong anomaly appear in the top part of ore body，indicating that the denudation of the ore bodies is shallow.The tail halo elements （Bi-Mo-Co-Ni） are weak，indicating that tail halo is not found in the existing prospecting work.In some area of Au1 and Au3 around 16th exploration line，the front halo is getting stronger in deeper part，indicating that the ore body has a certain extension to the depth.By comprehensine research and discussion，San’guanmiao gold deposit is classified as medium temperature magmatic hydrothermal type，the prospecting potential in deep is large.The Ⅰ and Ⅱprospecting target，the east of north mineralized alteration zone and the south mineralized alteration zone are considered as the future prospecting direction.
Boka gold deposit is hosted in a set of low-grade metamorphic pyroclastic sedimentary rocks and detrital carbonatite in the Paleoproterozoic-Mesoproterozoic.The δ34S(V-CDT) of gold-bearing pyrite has a change range from 3.71‰～7.93‰，which suggests that the sulfur comes from magma and stratums have been blend very well in the hydrothermal metallogenic system.The histogram of fluid inclusion homogenization temperature that ranges between 130～260 ℃ is evidently bimodal，which shows an character of evolutionary stages from medium to low temperature hydrothermal deposit.The salinity of those fluid inclusions tends to concentrated in a smaller range of 13.5%～17.6%，this shows that the hydrothermal ore-forming solution is medium-high sa linity fluids.The gas phase compositions of fluid inclusions is primary H2O with a few of CO2，CH4 and H2.The complex anion group and negative ions in liquid phase compositions is mainly F-，Cl- and SO42-，and the mainly positive ion contains Na+，K+，Ca2+ and Mg2+.It seems that there is a dynamometamorphic metallogenic stage after the hydrothermal mineralization period whose metallogenetic epoch is mainly Indo-China period to early Yanshan epoch.The gold deposit is the product of mixed hydrothermal mineralization which is concerned with sodic diorite magmatism during Indo-China period to early Yanshan epoch in the lithosphere expansion dynamic background.After that，the deposit has experienced the dynamic metamorphism of brittle-ductile shear in Himalayan period and finally developed a polygenetic compound ore deposit.
To ensure the safety of constructing tunnels，an improved unascertained measured model was built，using the confidence criterion，to ensure the risk level of tunnel collapse.The steps of risk assessment include three steps.Firstly selected rock level，depth，ground water conditions，bias angle and unfavorable geology as static indexes，meteoric water，excavation span，support measure and monitor measure as dynamic indexes.Secondly，the matter-element analysis method replacing the entropy weight analysis was used to determine the combination weights of static indexes and dynamic indexes.Finally，a risk aversion method was proposed，which is to lower the risk grade.The presented approach had been applied successfully in evaluating the construction risk of part of Guankouya tunnel.Not only did it judge risk grades exactly，but also it controlled risk factors effectively.This method offered new directions for assessment and risk control of tunnel collapse.
Aimming at the management status and management requirements of labor protection products in the safety production process of gold mine，carding and standardizing the process of issuing service about mine labor protection supplies，and carry on demand analysis.Summarize and organize the data information of labor protection products.Complete the data flow analysis and design material information management database based on local area network.Detailed design the overall structure and function framework of management system of the labor protection products.According to the actual business needs of the mine，the function modules are defined in detail.With the help of modern information technology to research and develope the labor protection management system of B/S on account of JavaEE technology architecture and Oracle database，to formulate scientific and reasonable labor insurance plan and realize the digital and standardized management of job types，material equipment and service life.To ensure the safety of mine production and accelerate the process of mine digitalization construction.The standardized management system of the labor protection product has been put into use in Xincheng gold mine and running in good condition，which basically achieve the desired effect.
The surface topography of rock joints has an important influence on the mechanical properties of rock.In order to study the change law of joint surface topography under normal compression，the compression tests were carried out on joints specimens.Joint surfaces were scanned by using 3D high precision laser profilometer （Talysurf CLI2000） before and after the experiments and 2D and 3D morphology characteristics map were obtained.And surface morphology feature height parameters are selected，including the maximum peak of the joint surface，high Sp，the maximum height SZ，maximum valley deep Sv，kurtosis coefficient Sku，partial slope coefficient Ssk，mean square height Sq，arithmetic mean height Sa.It is found that the Sp，Ssk，Sku decrease under normal stress，but decrease amplitude is smaller；SV decreases obviously under the compression closing test；Sz variation law is similar with above；Sa and Sq were increased after testing.The surface morphology of the joints has a significant effect on the closed curve of the joints.
When the evaluation index tend to the edge state，the model for slope stability analysis may result in“state out of balance” phenomenon.To solve the problem，the variable weight theory was introduced in slope stability analysis.The twelve most influential indices were selected from three respects including geological conditions，environment condition and engineering condition，to build the VW-UM analysis model for slope stability.In the model，constant weight must be calculated firstly.And then，variable weight which more coincidence with the real structure were calculated by variable weight theory based on the value of indices.The rank of slopes were taken by using uncertainty measurement theory at last.The model was used in analysis slopes of Xinqiao mine，Gushan mine and Huangmailing mine，the practice result reflected the superiority of the model in weight calculation.The evaluation result accord more perfectly with engineering facts when statistical value of indices tend to the edge stateual situation，provide a new method for reliability evaluation of emergency rescue system of underground mines.
This paper described the process mineralogy and beneficiation tests research on a magmatic rocks native gold mine of the grade is 4.92×10-6.The native gold is magmatic rocks type gold mine mineralized with arsenopyrite and pyrite，metal minerals are mainly pyrite and arsenopyrite，gangue minerals are mainly altered minerals，such as white mica and amphibole.It is difficult to leach with conventional carbon leaching and all slime cyanide leaching.Under the grinding fineness is 58.2% below 0.074 mm，by once roughing，once cleaning，once scavenging，cleaning tailings and scavenging concentrates combine return roughing，closed-circuit flotation experiment is carried out，gold concentrates containing 56.6×10-6 Au with recovery of 96.43%，gold tailings is only 0.19×10-6 are obtained.The flotation gold concentrate are high arsenic and sulfur.
Fine-disseminated type gold deposits are often rich in arsenic，mercury，antimony，carbon and other minerals difficult to deal with，fine grained gold is commonly used in sulfide minerals such as pyrite，belong to refractory ore.Gold mineral particle size is very small in a gold deposit in Shaanxi Province，mainly for sub-micro gold.It is difficult to obtain high grade gold concentrate by traditional flotation method，for the effective extraction of fine grained gold ore，technological mineralogy and mineral processing tests were carried out.Process mineralogy research shows the main gold bearing minerals are pyrite.Under the condition of -0.074 mm accounting for 60% of the fineness，the dissociation degree of pyrite was 93.48%.The form of natural gold is sub-micro gold and lattice gold，belonging to fine grain disseminated type refractory ore.Comprehensive comparison of mineral processing test shows that the gold mine is suitable for the process of “grinding-roasting-grinding-cyanide”，and under the condition of the ore grinding to -0.075 mm accounted for 80%，and then roast 2 h at 650 ℃，the calcined ore grinding to -0.075 mm accounted for 95%，NaCN dosage of 4 kg/t and cyanide time of 36 h， the gold leaching rate can reach 73.36%.The test scheme is suitable for the flotation of fine disseminated gold ores，mineral processing effect is more ideal.
The major valuable elements of a certain lead-zinc mine in Guangdong Province are tungsten，lead and zinc，containing 1.32% of tungsten，1.77% of lead，1.87% of zinc，and accompanying with silver.Tungsten mineral content exists mainly in the form of wolframite，and a small amount in the form of scheelite and tungstite.Among them，the wolframite is brittle，which would cause a over crushing phenomenon in crushing and grinding process.However，the existing beneficiation technology is difficult to recover fine practical tungsten，so lead to the loss rate of tungsten increased.Different grinding media have a significant influence on mineral dissociation and grinding efficiency.Particle size analysises to grinding products of different grinding media were done in this paper，and separation experiments were carried out respectively，which indicated that hexagonal prism as grinding medium had good selective effect on fine mineral particles and thus reduced the production of refractory size fraction.With hexagonal prism as grinding medium，technological process of grinding with hexagonal prisms-table separation-suspension vibration sorting to over flow products was employed to tungstenic lead-zinc mine in Guangdong and rough concentrate was obtained containing 15.41% of tungsten，16.21% of lead，17.03% of zinc and 167.92 of silver.Meanwhile，recovery rates of tungsten，lead，zinc and silver were 81.31%，63.97%，63.63% and 46.46%，respectively，and loss rates of tungsten，lead，zinc and silver in shaking table tailings were 8.08%，12.89%，17.16% and 22.80%，respectively，achieving the goal of comprehensive utilization of resources.By introducing a new type of grinding medium hexagonal prism，the index of a certain lead-zinc mine in Guangdong dramatically improved，has made remarkable achievements.
The SAG（semi-autogenous） mill discharge grading is an important link in improving grinding efficiency of concentrator.The Straight-line vibrating screen classification was used in the SAG mill discharge grading of a gold mine in Qinghai Province，this serious influenced the stability of the production run，due to the high failure rate of linear vibrating screen，low mill plant operation rate.By changing the linear vibrating screen to cylinder sieve classification，equipment operation rate increased by 1%，beneficiation cost savings of nearly 100 000 yuan.The results show that the trommel screen can achieve the same effect as the linear vibrating screen in the grading equipment of the semi-autogenous mill.Compared with the linear vibrating screen，the trommel screen has the advantages of low energy consumption，low cost，simple structure and convenient maintenance.Thus greatly reducing the labor intensity and equipment maintenance time，improve the dressing plant equipment operation rate.The transformation of the beneficiation plant to enhance the process indicators has the vital significance.
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