浅埋缓斜煤层回采巷道合理煤柱宽度设计  

Design of rational width of coal pillars in gateways in gently inclined shallow coal seams

作　　者：李晓龙 丁效雷[2] 姚强岭[2] 王益品[2] 章磊[2] 

机构地区：[1]神华宁夏煤业集团梅花井煤矿,宁夏自治区灵武市750411 [2]中国矿业大学矿业工程学院,江苏省徐州市221008

出　　处：《中国煤炭》2009年第3期44-47,共4页China Coal

摘　　要：探讨了煤柱的受力情况及煤柱的极限承载能力,通过极限平衡理论塑性区计算模型得出最小煤柱宽度,并用数值模拟分析了尺寸效应对煤柱塑性区宽度、应力分布及巷道变形的影响。This paper iscusses the pressure from the roof strata onto the coal pillars and the latter＇s extreme load bearing capacity. Minimum width of the coal pillars in question is obtained by using the calculating model for plastic deformation area based on the theory of limiting equilibrium. Also, numerical simulation is used for the analysis of the impact of scale effect on the width of the plastic deformation areas of the coal pillars, stress distribution of the coal pillars and the gateway deformations.

关 键 词：煤柱宽度 缓斜煤层 塑性区 数值模拟 

分 类 号：TD822.3[矿业工程—煤矿开采]