厚煤层分岔区下分层回采巷道位置选择  

Location selection of lower layer mining roadway in thick coal seam bifurcation area

作　　者：秦忠诚[1] 聂旺 刘永乐 张玉柏 刘利宁 QIN Zhongcheng;NIE Wang;LIU Yongle;ZHANG Yubo;LIU Lining(College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590,China;Nantun Coal Mine,Yankuang Group, Zoucheng, Shandong 273515, China)

机构地区：[1]山东科技大学能源与矿业工程学院,山东青岛266590 [2]兖矿集团南屯煤矿,山东邹城273515

出　　处：《山东科技大学学报（自然科学版）》2020年第3期43-49,共7页Journal of Shandong University of Science and Technology(Natural Science)

摘　　要：针对分岔厚煤层下分层难以确定回采巷道位置这一问题,通过采用室内试验对夹矸层和3下煤层受采动影响破坏进行分析。采用数值模拟对6种不同方案下围岩的应力分布规律、巷道变形特征和塑性区分布情况进行分析,结果表明:与煤柱中心的水平间距为30 m处巷道围岩稳定性较好,其巷道围岩塑性区范围及变形量小。通过现场监测对巷道稳定性进行验证,表明在距离残余煤柱30 m处布置回采巷道,围岩的变形量比较小,巷道围岩具有良好的稳定性。研究结论为类似条件下的巷道位置选择提供了借鉴。Considering the difficulty of determining the location of mining roadway under the thick coal seam bifurcation area,this paper analyzes the failure of the gangue layer and lower three coal seams affected by miningbased on experimental evaluation.The stress distribution law,roadway deformation characteristics and plastic zone distribution of surrounding rock under 6 different schemes were first analyzed byusing numerical simulation.The analysis shows that when the horizontal distance from the coal pillar center is 30 m,the surrounding roadway rock has better stability and smaller plastic zone range and deformation.The stability of the roadway was then verified by field monitoring.The results show that when the mining roadway is arranged 30 m away from the residual coal pillar,the deformation of the surrounding rock has relative deformation and better stability.The study provides theoretical support for the selection of roadway location in similar conditions.

关 键 词：围岩应力 分岔区 巷道布置 围岩变形 塑性区 

分 类 号：TD263.1[矿业工程—矿井建设]