煤矿工作面小煤柱留设宽度研究和支护优化

Study on reserved width of small coal pillar and supporting optimization in working face of coal mine

为合理设计某矿小煤柱宽度以降低煤炭损失率,采用关键层理论、极限平衡理论等分析方法,结合FLAC 3D数值模拟以及现场矿压监测研究方法,综合得出小煤柱合理宽度为12 m。基于围岩变形耦合控制理论对煤柱侧支护、采面侧支护等进行优化设计,有效控制了围岩变形和矿压。

In order to reasonably design the width of small coal pillar in No.2 Coal Mine of a mine in order to reduce the coal loss rate,the theoretical analysis methods such as critical layer theory,limit equilibrium theory,FLAC 3D numerical simulation technology and on-site mine pressure monitoring were jointly adopted,and the reasonable width of small coal pillar was obtained as 12 m.Based on the coupling control theory of surrounding rock deformation,the optimization design of coal pillar side support and mining face side support was carried out,and the surrounding rock deformation and ore pressure were effectively controlled.