下保护层开采卸压保护范围及可行性分析

Analysis of Pressure-relief Protective Range and Feasibility of Under-protecting Coal Stratum Mining

摘要: 基于有限差分计算方法,对李雅庄矿下保护层开采进行数值模拟分析,得出下保护层开采时被保护层应力分布、变形规律及卸压保护范围等,同时借助模拟结果,运用有效隔水层突水系数法对下保护层突水危险性区域进行划分,并对保护层开采可行性进行分析判断。结果表明,下保护层开采后卸压保护层角为50°左右,下保护层开采不可行。
- 保护层开采 /
- 保护范围 /
- 突水 /
- 可行性
Abstract: Based on finite difference method,the numerical simulation analysis on under-protecting coal stratum in Liyazhuang mine is carried out,the stress distribution,deformation laws and pressure-relief protective range of protected coal seam are achieved.Meanwhile,according to the simulation results,using water inrush coefficient method of effective waterproof layer to divide water inrush risky area of under-protecting coal stratum,the feasibility of protective coal seam mining is analyzed and judged.The results show that the under-protecting coal stratum is not feasible when the pressure-relief protective angle reaches up to about 50°after mining under-protecting coal seam.
- protective layer mining /
- protection range /
- water inrush /
- feasibility

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