深部煤层窄煤柱留设宽度数值模拟优化研究  

Numerical Simulation Optimization Study on Width of Narrow Coal Pillar in Deep Coal Seam

作　　者：张宇菲[1] 李旭光 庄泽锋 杨瀚 叶建坪 蒋泽琨 ZHANG Yufei;LI Xuguang;ZHUANG Zefeng;YANG Han;YE Jianping;JIANG Zekun(School of Mechanics ＆ Civil Engineering,China University of Mining and Technology（Beijing）,Beijing 100053,China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《煤矿安全》2018年第10期225-229,233,共6页Safety in Coal Mines

摘　　要：以杨庄矿区段煤柱留设为依托,运用数值模拟手段,分析煤柱宽度变化过程中主应力差、塑性区、支护受力与围岩位移演化特征。结果表明:主应力差曲线"马鞍型"宽度与煤柱非塑性区演化特征较吻合;主应力差、支护受力、围岩变形及塑性区演化特征有效表征煤柱稳定性;煤柱宽度6 m,支护受力最大,塑性区基本贯通,主应力差峰值最高,煤柱稳定性最差;煤柱宽度8~10 m,为煤柱合理宽度留设范围。应用表明,煤柱宽度8 m,相邻回采巷道围岩稳定,煤炭回收率提高,满足矿井生产要求。Based on retaining the section coal pillar in Yangzhuang Coal Mine, the numerical simulation method is used to analyze the main stress difference, plastic zone, supporting force and the displacement evolution characteristics of surrounding rock with the change of coal pillar width. The ＂saddle＂width of the main stress difference curve is in good agreement with the evolution characteristics of non-plastic zone of coal pillar. The main stress difference, the bolt support force, the deformation of surrounding rock, and the evolution characteristics of the plastic zone of coal pillar can effectively characterize the stability. When the width of coal pillar is 6 m, the plastic zone has basically passed through, and the peak value of the principal stress difference is the highest, which makes the stability of the coal pillar poorest. The reasonable width is from 8 m to 10 m. The result of application shows that the deformation of surrounding rock can be effectively maintained, and the requirements of the mine can be met when the width is 8 m.

关 键 词：区段煤柱 煤柱宽度 主应力差 支护受力 数值模拟 

分 类 号：TD322.4[矿业工程—矿井建设]