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The Study on the Stability of Goaf under the Buildings in Xikuangshan and the Recovery Technology of Residual Ore

Author: SongLiXia
Tutor: TaoGanQiang
School: Nanhua University
Course: Mining engineering
Keywords: Goaf stability RECLAMATION Finite Element Numerical Simulation Surface subsidence Stope structure parameters
CLC: TD864
Type: Master's thesis
Year: 2008
Downloads: 207
Quote: 0
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Abstract


Xikuangshan mining areas of surface distribution of important buildings such as schools, factories and residential buildings , underground mining is not allowed to produce large ground pressure to destruction . In addition , the large number of unprocessed China in the near-surface goaf . The goaf may induce ground collapse , endangering the safety of the surface of buildings and structures , and to this end carry tin mine buildings goaf stability analysis remnant ore recovery technology topics . This paper includes the following aspects : ( 1) geological survey of the site of the tin mines and mine geological data collection , collation , master mine engineering geological conditions , hydrogeological conditions , and analyzed goaf scale distribution with distribution and surface buildings . ( 2) a test of physical and mechanical parameters of rocks , mine ore and rock mechanics parameters . ( 3 ) the establishment of a three - dimensional elastic-plastic finite element model , numerical simulation of nonlinear finite element analysis of the stability of the building foundation on the the goaf surrounding rock and surface . The simulation results show that the goaf destruction may exist . The measures proposed mine old goaf processing . ( 4 ) remnant ore recovery program , and the mining method and mining process numerical simulation to obtain reasonable stope structure parameters and the mining process . Made major research : using on tailings backfill to the level hierarchical method , the first back to the mining column , then back to the mining room filling method of tailings cemented filling method . Pillar width of 8m, the stope span of 12m . The stratification height of 2.5-3m, maximum control top height of 10m . Project goaf tin mines antimony ore zone processing and recovery of remnant ore reasonable security, economic and technical programs , and for other metal mines buildings under the deposit mining provides reference .

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CLC: > Industrial Technology > Mining Engineering > Mining > Metal ore mining > Rare and a small amount of metal ore mining
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