采空区及煤柱下回采巷道合理布置位置研究

Study on Reasonable Layout Position of Mining Roadway under Goaf and Coal Pillar

针对多煤层开采上覆煤层后采空区及遗留煤柱引起底板应力变化,对寺河二号井94313综采工作面回采巷道位置进行相似模拟研究,分析上覆岩层变形破坏对下部煤层应力的影响,为下煤层回采巷道布置位置提供理论依据。结果表明:残留煤柱下9号煤层垂直应力呈单峰值分布,距离煤柱边缘30 m以外垂直应力趋于稳定。

In view of the floor stress changes caused by goaf and residual coal pillar after mining the overlying coal seam in multi seam,the similar simulation study on the position of mining roadway in the 94313 fully mechanized working face of Sihe No.2 Well is carried out,and the influence of deformation and failure of overlying strata on the stress of lower coal seam is analyzed,so as to provide theoretical basis for the layout position of mining roadway in lower coal seam.The results show that the vertical stress of No.9 coal seam under the residual coal pillar presents a single peak distribution,and the vertical stress tends to be stable 30 m away from the edge of the coal pillar.