长沟峪煤矿大倾角中厚煤层变薄带的顶板压力

Roof pressure of thinner zone at thick coal seam with large inclined angle in Changgouyu

大倾角煤层开采后,受采空区冒落矸石下滑充填的影响,特别是工作面中部煤层变薄带的影响,工作面顶板岩层的变形、破坏和运动形式不同于其他煤层。以长沟峪大倾角煤层变薄带顶板压力观测数据为基础,结合计算机模拟方法,分析该煤层顶板压力特点。数值模拟与实测分析均显示工作面煤层变薄带下部顶板压力大。这为相近条件下采煤工作面顶板支护设计提供了技术指导。

This paper introduces an insight into the steeply dipping seams which following the mining operation,are subjected to the deformation,destruction and movement occurring in roof rock in the different way from other coal seam,due to the impact of waste rock falling down from Gob,especially the thinner zone of coal face at the medium steep seam.The approach involves an analysis of the character of roof pressure at steeply dipping seam,based on observation pressure data of the similar geological condition in Changouyu and combined with the numerical simulation method.Both numerical simulation and experimental analysis show that the lower part of thinner zone of coal face is exposed to a higher roof pressure.This research provides technical guide for roof support designed for coal faces with the similar conditions.