锯齿状煤柱下工作面支承压力的分布特征  

Abutment Pressure Distribution of Working Face Under Jagged Coal Pillar

作　　者：李逢祥 孙振中[2] 刘浩[1] 杨洋[2] 刘绪峰[1] 

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590 [2]兖州煤业股份有限公司济宁三号井煤矿,山东济宁272169

出　　处：《煤矿安全》2016年第11期211-214,共4页Safety in Coal Mines

摘　　要：为了研究锯齿状煤柱下工作面支承压力的变化规律以及分布特征,采用FLAC3D5.0数值模拟软件对锯齿状煤柱下工作面推进到不同位置时煤体垂直应力场进行了模拟。通过对工作面推进过程中走向支承压力、倾向支承压力动态演化特征分析得出:受锯齿状煤柱宽度的变化以及煤柱集中应力的影响,煤柱下工作面的应力主要集中在两端,其中三角形区域最为明显,在煤柱最窄处形成叠加应力。For studying change laws and distribution characteristics about abutment pressure ol working tace under jagged coal pillar, the FLAC3D 5.0 is adopted to simulate the vertical stress filed of working face when working face under jagged coal pillar advanced to difference locations. Based on the analysis of dynamic evolution characteristics of abutment pressure in strike and tendency during working face advancing, we obtained that stress concentrated at both ends of working face under coal pillar, and the most obvious was in triangle area and formed superimposed stress in the narrowest pillar by the width changes of jagged pillar and the impact of coal pillar stress concentration

关 键 词：数值模拟 锯齿煤柱 支承压力 分布特征 冲击地压 

分 类 号：TD323[矿业工程—矿井建设]