冲击地压矿井综采工作面区段小煤柱合理性研究  

Study on rationality of small coal pillars in fully-mechanized miningface section of rock burst mines

作　　者：赵毅 张寅 ZHAO Yi;ZHANG Yin(China Coal Energy Research Institute Co.,Ltd.,Xi′an 710054;School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123008,China)

机构地区：[1]中煤能源研究院有限责任公司,陕西西安710054 [2]辽宁工程技术大学力学与工程学院,辽宁阜新123008

出　　处：《煤炭科技》2024年第1期103-109,共7页Coal Science & Technology Magazine

基　　金：国家自然科学基金资助项目(52174116)。

摘　　要：合理宽度区段煤柱的留设对综采工作面临空巷道动力显现、冲击地压防治具有重要作用。以纳林河二号矿井2种宽度区段煤柱综采工作面为研究背景,首先,采用理论计算分析确定综采工作面合理区段煤柱宽度;其次,采用FLAC3D数值模拟软件,分析2种宽度区段煤柱综采工作面回采期间煤柱、巷道应力场和塑性场分布特征,得到2种宽度区段煤柱条件下煤柱和巷道的力学特征;最后,收集现场微震、应力监测数据进行对比分析,验证动静载叠加条件下区段小煤柱留设合理性。研究区段小煤柱对鄂尔多斯地区综采工作面防冲具有积极意义。The setting of coal pillar in reasonable width section plays an important role in the dynamic behavior of gob roadway and the prevention and control of rock burst in fully-mechanized mining face.Based on the research background of the fully-mechanized coal pillar mining face in two different width sections of the Nalinhe No.2 Mine,theoretical calculation and analysis were first used to determine the reasonable section coal pillar width of the fully-mechanized mining face.Secondly,FLAC 3D numerical software was used to analyze the distribution characteristics of the coal pillar,roadway stress field,and plastic field during the mining period of the two size section coal pillar fully-mechanized mining face.The mechanical characteristics of coal pillars and roadways under two different width range coal pillar conditions were obtained.Finally,by comparing and analyzing on-site microseismic and stress monitoring data,the rationality of retaining small sized section coal pillars under dynamic and static load superposition conditions was verified.The study of small coal pillars in different sections has positive significance for preventing erosion in fully mechanized mining faces in the Ordos region.

关 键 词：冲击地压 区段煤柱 现场监测 应力分布 

分 类 号：TD324[矿业工程—矿井建设]