2010•Coal Mining TechnologyRequires access
Research on Safety Coal and Rock Pillar Design for Full-mechanized Caving Mining under Water Body in 1702~(-1) Face of Duolunxiexin Colliery
Jianbo Li
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Abstract
Based on hydrogeology exploration,rock and soil test,overlying strata structure analysis,observation of two-zone height,analog simulation and numerical simulation,this paper discussed the feasibility of reducing thickness of protective coal and rock pillar.Analysis results showed water-proof pillar might be changed into sand-proof pillar and provided base for mining method optimization.