The Stability Analysis And Filing Governance Of The Gold Mine Goaf In Shuiyin Cavity

Roof falling, rib spalling, rock bursting, rock dislocation, bump, ground collapse asthe most common forms that caused by goaf of underground mining endanger minesafety in production. Therefore, the analysis of goaf stability and recovery of goaftreatment method is very important.A large underground rock gold deposit is located in the territory of Zhenfeng,Guizhou province, the ore body is formed by multilayer gently inclined thin veinoverlap, depth80-280m, the mining method for the comprehensive method. The mineproduction has resulted in a large number of mined-out areas because of the spacebetween the upper and lower seam is closer (nearest is only2meters), so that goafmutual influence is more serious after the upper and lower seam exploited, laws ofmining pressure appear strong since the mine constructed in2001. With the furtherexploitation of the one or two period of gold, a large area of the goaf has affected thestability and mining of ore body. Because of mine surface has a large number of housesand mine industrial facilities, so that the surface subsidence area are not allowed. Gobexposed area and volume gradually increased as a result that danger of large area roofrippled surface caused by ground collapse with production of gold mine. Therefore, thispaper uses field measurement, theoretical analysis, numerical simulation andexperimental research methods to analyze gob stability and optimize governance ofShuiyindong gold mine, then obtain research results.â‘ In order to get the distribution scale of gob in the Shuiyindong Gold Mine bythe field investigation and test. Get the quality grade of mineral in gob by physical andmechanical performance test.â‘¡Field test of pressure for gob. Analyzed the compression of gob roofsubsidence and concrete brick pillars compression by appeared in the gob pressure, weget the regularity of ground pressure appeared.â‘¢Through FLAC3D numerical simulation, we get the safety factor indifferentspan, different thickness of top plate and the regularity between them.â‘£By material experiment, combining with the actual operation cost it isconcluded best filling material matching for gob governance method of filling method.