大采高综采工作面煤壁稳定性及控制研究  

Study on stability and control of coal wall in fully-mechanized face with large mining height

作　　者：关丙火 李文杰 Guan Binghuo;Li Wenjie(Shendong Coal Group Corporation,Yulin 719315,China)

机构地区：[1]神东煤炭集团公司,陕西榆林719315

出　　处：《能源与环保》2023年第5期289-292,298,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

摘　　要：为研究大采高工作面煤壁片帮问题及其控制方法,以甘肃某煤矿大采高综采工作面条件为研究背景,采用数值模拟和力学分析相结合的研究方法,开展大采高煤壁应力、位移分布特征和煤壁片帮控制研究。由数值模拟结果可知煤壁应力集中系数为2.14,煤壁最大位移位于煤壁上部区域,距离底板3.5~4.2 m,确定煤壁片帮高度2.1 m,约0.33倍的采高。通过建立煤壁梯形滑块力学模型,分析煤壁失稳极限平衡时的受力状态,计算得到煤壁护帮强度不小于0.365 MPa。研究成果可为该矿井及相似条件矿井控制煤壁片帮提供理论指导。In order to study the problem of coal wall spalling and its control method in large mining height working faces,taking the condition of fully-mechanized working face with large mining height in a certain coal mine in Gansu as the research background,the distribution characteristics of stress and displacement in large mining height coal walls and the control of rib spalling were studied by combining numerical simulation and mechanical analysis.The numerical simulation results showed that the coal wall stress concentration factor was 2.14,the maximum displacement of the coal wall was located in the upper part of the coal wall,3.5 to 4.2 m away from the floor,and the height of rib spalling was 2.1 m,about 0.33 times of the mining height.The mechanical model of coal wall trapezoidal slide block was established to analyze the force state of coal wall instability limit equilibrium,and the strength of coal wall protection was calculated to be no less than 0.365 MPa.The research results could provide theoretical guidance for the control of rib spalling in this mine and similar mine.

关 键 词：大采高 煤壁稳定性 煤壁片帮 数值模拟 

分 类 号：TD712[矿业工程—矿井通风与安全]