近距离煤层定量判定方法探讨

摘要

在分析我国近距离煤层群开采和研究现状的基础上,以西山矿区杜儿坪矿为工程背景,以理论分析和数值计算方法为手段,重点研究不同煤层厚度、 不同煤柱尺寸和不同底板深度对近距离下部煤层应力状态的影响,分析底板下部岩层垂直应力分布特征和变化规律,认为底板深度Z是影响下部岩层应力状态的关键参数,提出了一种新型"近距离煤层群"定量性判定方法,弥补近距离煤层群相关定义的空白现状,对于后续近距离煤层开采提供一定的借鉴意义.%Based on the analysis on current status of close coal seams group mining and research in China, and the engineering background of Xishan Duerping Coal Mine, we applied theoretical analysis and numerical calculation methods, to study the influence of coal seam thickness, coal pillar size and floor depth on stress state of lower coal seam in close distance coal seams group, and analyzed the distribution characteristics and variation regularity of vertical stress in lower strata of floor, which showed floor depth Z was the key factor. Also, a new quantitative determination method for close distance coal seams group was put forward.