7～9m急倾斜厚煤层Z型通风工作面的矿压显现规律  

Mechanism underlying mine ground pressure occurring in Z type ventilation faces designed for 7 ～ 9 m-thick steeply dipped coal seams

作　　者：董长吉[1] 翟永胜[2] 

机构地区：[1]黑龙江科技大学黑龙江省普通高等学校采矿工程重点实验室,哈尔滨150022 [2]北京昊华能源股份有限公司长沟峪煤矿,北京102451

出　　处：《黑龙江科技学院学报》2014年第4期345-347,369,共4页Journal of Heilongjiang Institute of Science and Technology

基　　金：黑龙江省教育厅科学技术研究(指导)项目(12533061);黑龙江省普通高校采矿工程重点实验室开放课题(2013-KF08)

摘　　要：根据长沟峪煤矿煤层地质条件,结合7 ～9 m急倾斜厚煤层Z型通风工作面整体悬移组合支架的工作阻力变化特点,对开采块段顶板压力变化情况进行现场观测与数值模拟分析.结果表明：Z型通风工作面运输巷道和回风巷道的超前加强支护范围为距离工作面12 m范围;回风巷道应力集中区域为工作面上方6 m范围;合理的区段放煤高度为14 m.现场观测与数值模拟结果相符,为同类煤层顶底板移动规律及开采方法研究提供了依据.This paper is concerned specifically with on-site observation and numerical simulation analysis of changes in block mining roof pressure, based on coal seam geological conditions occurring in Changgouyu colliery and combined with the changing behavior of working resistance prevailing in overall suspended portfolio scaffolds used in Z-type ventilation faces in steeply inclined 7 - 9 m-thick coal seams. The results show that advance reinforcement range in the haulage roadway and the ventilation roadway of the Z-type ventilation face is 12 m from face; stress concentration region of back wind tunnel is in the range of 6 m above the faces; and the reasonable section caving height is 14 m. The field observations are consistent with numerical simulations, suggesting a potential framework for an insight into mining methods and law underlying the roof or floor movement occurring in coal seams of similar mining conditions.

关 键 词：急倾斜煤层 矿压 观测 数值模拟 

分 类 号：TD324[矿业工程—矿井建设]