摘要
针对特厚煤层综放工作面矿压显现强、顶板治理的难题,以梨园河煤矿51104综放工作面为背景,通过理论和数值仿真,对工作面推进过程中的顶板破断特性及围岩应力演化进行了研究。极限跨距计算求得基本顶初次破断步距为33.7 m;通过FLAC3D软件分析工作面推进过程中围岩应力规律及塑性区变化,得到基本顶初次破断步距为30~35 m,与理论分析结果相符。
In view of the difficulties of strong mining pressure and roof treatment in the fully mechanized caving face in extremely thick coal seam,taking 51104 fully mechanized caving face in Liyuanhe coal mine as the background,the characteristics of the roof breaking and the stress evolution of surrounding rock during the advancing process of the caving face were studied by combining theoretical analysis and numerical simulation.The limit span was calculated to obtain the initial breaking step of the basic roof as 33.7 m.FLAC3D was applied to analyze the stress rule and plastic zone variation in working face,and the initial breaking step of the basic roof is 30-35 m,which is in agreement with the theoretical analysis results.
作者
张君宝
刘增辉
吴子扬
冉永府
Zhang Junbao;Liu Zenghui;Wu Ziyang;Ran Yongfu(School of Mining Engineering,Anhui University of Science and Technology,Huainan 232001,China)
出处
《煤矿机械》
2024年第9期68-70,共3页
Coal Mine Machinery
基金
国家自然科学基金项目(51974007)。
关键词
综放工作面
理论分析
数值模拟
初次破断步距
fully mechanized caving face
theoretical analysis
numerical simulation
initial breaking step
