近距离下位煤层巷道位置及支护方案应用研究

Research on the Position and Support Scheme Application of Close Distance Lower Position Coal Seam Roadways

平煤十二矿己16-17煤层埋深大且近距离上位煤层大部分已采空,综合运用矿压监测、理论计算、数值模拟等方法,对下位煤层巷道合理布置位置及支护方案展开研究。结果表明:己16-17-31020回风巷外错上位采空区遗留煤柱25 m布置,掘巷阶段顶板离层量小于10 mm,围岩控制效果良好,可为类似条件下下位煤层巷道的位置选择及支护设计提供借鉴。

The Ji16-17 coal seams in Pingmei No.12 Coal Mine are deeply buried and most of the upper coal seams in close distance are mined out.By comprehensively using methods such as mine pressure monitoring,theoretical calculation,and numerical simulation,the research is conducted on the reasonable layout position and support scheme of the lower coal seam roadway.The results show that the Ji16-17-31020 return air roadway is arranged in a staggered outward at the left coal pillars in the upper goaf by 25 m,and the roof layer separation amount during the roadway excavation stage is less than 10 mm.The surrounding rock control effect is good,which can provide reference for the location selection and support design of lower coal seam roadways under similar conditions.