近距离煤层下行开采下煤层回采巷道布置  

Layout of Mining Roadway in Downward Mining Lower Seam in Close Distance Coal Seam

作　　者：任仲久 PtEN Zhongjiu(China Coal Technology and Engineering Group Shenyang Research Institute, Fushun 113122, Chin)

机构地区：[1]煤科集团沈阳研究院有限公司,辽宁抚顺113122

出　　处：《煤矿安全》2018年第3期136-139,共4页Safety in Coal Mines

摘　　要：针对某矿残留煤柱下煤层开采所遇到的回采巷道合理布置问题,通过理论分析、数值模拟和现场应用等研究方法,分析了某矿近距离煤层下行开采残留煤柱的底板破坏范围及对下煤层回采巷道稳定性的影响。利用土力学的太沙基理论并结合某矿3^(-2)号煤层及底板岩体的力学性质计算了残留煤柱下底板破坏范围,又运用数值模拟研究了残留煤柱载荷作用下外错5 m布置回采巷道的应力场与塑性区分布情况,并且对某矿3^(-3)号煤33305工作面掘进巷道进行了验证分析,最终验证了回采巷道外错5 m布置的合理性。For the problem of reasonable layout of mining roadway encountered in lower coal seam mining under residual pillar in a coal mine, through theoretical analysis, numerical simulation and field application, this paper analyzes the floor failure range of residual coal pillar in downward mining of closed distance coal seam and the influence on the stability of lower mining roadway.Based on the theory of soil mechanics and the mechanical properties of 3^（-2#） coal seam and floor rock, the floor destruction range of residual coal pillar is calculated in this paper, the stress field and plastic zone distribution outer mining roadway of 5 m under the residual coal pillar loading are studied by numerical simulation. In addition, a verification analysis was conducted on the excavation roadway of the 33305 working face in the 3^（-3#） coal seam of a coal mine and the layout rationality of outer roadway of 5 m is finally verified.

关 键 词：近距离煤层 残留煤柱 巷道布置 塑性区 巷道稳定性 

分 类 号：TD263[矿业工程—矿井建设]