摘要
针对三元福达矿区段煤柱设计偏大、采区采出率较低的生产实际问题,综合采用现场实测、数值模拟、理论计算等方法,对三元福达矿大采高区段煤柱宽度进行优化分析。理论分析与现场实测表明:煤柱采空区侧形成的的塑性区宽度为6.31 m,工作面回采扰动形成的塑性区宽度为6~8 m,煤柱内弹性区宽度取4.31 m。据此结合煤层赋存条件,通过三维数值模拟软件对不同煤柱宽度下应力及位移分布特征进行了分析,确定区段煤柱合理宽度为19 m。
In Sanyuan Fuda Mine, there are some problems in production such as large section coal pillars and low mining rate. The pillar width in large-mining-height section was optimized through an integrated method with field measurement, numerical simulation and theoretical calculation. The study results show that the width of plastic zone caused by mined-out area, by mining disturbance, and in the pillars is 6.31 m, 6.0m-8.0m, and 4.31 m, respectively. Based on occurrence condition, the 3D numerical simulation on the stress and displacement distribution under different pillar widths determines the rational width of the section pillars to be 19 m.
出处
《山西煤炭》
2015年第5期58-60,共3页
Shanxi Coal
关键词
大采高
塑性区
区段煤柱
优化分析
large-mining-height
plastic zone
section coal pillar
optimization analysis