高瓦斯综放工作面区段煤柱合理尺寸确定  

Determination of Reasonable Size of Segment Coal Pillar in High Gassy Fully Mechanized Working Face

作　　者：苏超 鲁健 郭萌 SU Chao;LU Jian;GUO Meng(College of Mining Engineering of TUT,Taiyuan 030024,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《矿业安全与环保》2018年第4期89-92,97,共5页Mining Safety & Environmental Protection

基　　金：国家"十二五"科技支撑计划项目(2012BAB13B04)

摘　　要：为确定区段煤柱的合理尺寸,从保持煤柱稳定性所需宽度条件入手,建立煤柱两侧塑性破坏区理论计算公式。结合现场实测数据,提出留设煤柱宽度27、30、33 m 3种方案;利用FLAC3D数值软件分析了下区段工作面回采时煤柱及巷道的应力场及塑性变形特征。研究结果表明,当区段煤柱宽度为27 m时,煤柱两侧应力集中现象明显,塑性破坏深度包络帮锚杆全长且巷道边缘处于应力增高区,不利于巷道稳定;当煤柱宽度达到30、33 m时,巷道围岩情况明显改善。综合考虑3个"有利于"原则,确定常村矿2207工作面区段煤柱合理宽度为30 m。In order to determine the reasonable size of segment coal pillar,the theoretical calculation formula of plastic failure zone on both sides of the coal pillar was established on the premise that the width of the coal pillar need to maintain its stability. Three schemes were proposed that the width of coal pillar was respectively 27 m,30 m and 33 m combined with field measurement data. The stress field and plastic deformation characteristics of coal pillar and roadway during the mining of working face in the lower section were analyzed by FLAC3 Dnumerical software. The research results showed that when the segment coal pillar is 27 m wide,the stress concentration is obvious on both sides of the segment pillar,the plastic failure envelopes bolt deeply and the edge of the roadway are in the stress area,which is not conducive to the stability of roadway; the surrounding rock condition of the roadway is obviously improved when the width of coal pillar reaches 30 m or 33 m. Considering the principles of three＂favorable＂,the reasonable width of segment coal pillar in 2207 working face of Changcun Coal Mine is determined to be30 m.

关 键 词：综放工作面 区段煤柱 煤柱尺寸 理论计算 应力分析 数值模拟 

分 类 号：TD32[矿业工程—矿井建设]