羊场湾煤矿上行开采合理巷道断面形状确定  

Determination of roadway cross-section shape in upward mining of Yangchangwan Coal Mine

作　　者：杨胜利[1] 刘传义 李明[1] 刘垚[1] 许金梦 岳豪 YANG Sheng-li;LIU Chuan-yi;LI Ming;LIU Yao;XU Jin-meng;YUE Hao(School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 10(K)83,China)

机构地区：[1]中国矿业大学(北京)能源与矿业学院,北京100083

出　　处：《煤炭工程》2022年第2期5-11,共7页Coal Engineering

摘　　要：为了研究羊场湾煤矿上行开采条件下合理巷道断面形状选择问题,通过理论计算二煤开采后的"两带"高度,现场实测采空区覆岩破坏范围,总结不同巷道断面形状的优缺点及适用范围,采用FLAC;数值模拟软件模拟研究了上行开采条件下巷道围岩的受力与变形破坏特征,并进行了现场验证。研究表明:二煤开采后,裂隙带高度约为38.75~49.95m,围岩完整性较低,上行开采巷道位于裂隙带内;模拟得出了直墙半圆拱形断面巷道在上行开采条件下围岩稳定性最好,微拱形次之,矩形最差;结合数值模拟分析与现场验证最终确定了采用微拱形断面最为合适。In order to determine the roadway cross section shape for upward mining in Yangchangwan Coal Mine,through theoretical calculation of the“two zones”height after the No. 2 coal seam mining and field measurement of the failure range of overburden rock in goaf,the advantages and disadvantages of different roadway cross section shapes and their application range are summarized. FLAC;software is used to study the stress and deformation failure characteristics of the surrounding rock under upward mining,and the result is verified in the field. The research shows that after the No. 2 coal seam mining,the height of the fracture zone is about 38. 75 ~ 49. 95 m,the integrity of surrounding rock is low,and the upward mining roadway is in the fracture zone. According to the simulation results,the stability of the surrounding rock is the best with the section shape of straight wall semi-circular arch,followed by micro-arch and rectangle. And the micro-arch section is the most suitable one,considering the results of both the simulation and field verification.

关 键 词：羊场湾煤矿 上行开采 断面形状 数值模拟 

分 类 号：TD263[矿业工程—矿井建设]