基于能量释放法的近距离煤层巷道布置位置优化分析  

Optimization Analysis of Roadway Layout of Close Coal Seam Based on Energy Releasing Method

作　　者：孟浩[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤矿安全》2018年第2期194-198,共5页Safety in Coal Mines

基　　金：国家重点基础研究发展计划(973计划)资助项目(2013CB227903);国家自然科学基金面上资助项目(51574244);国家自然科学基金煤炭联合基金重点资助项目(U1361209)

摘　　要：为保证多煤层工作面安全高效开采,以新柳煤矿下位煤层内错距20 m布置巷道造成煤损较大为契点,采用室内试验对煤块受载其内部能量激增至破坏机制进行分析,并采用能量法对区段煤柱受载其内部能量积聚及其对底板煤岩体形成的破坏进行分析以确定区段煤柱合理的留设尺寸。研究表明:煤体受载(外界输入能量)导致其内部弹性能积聚至最大值,煤体继续受载其内部能量开始释放并用于形成煤体损伤直至煤体完全破坏;通过相似模拟试验对煤层区段煤柱(W区域)内部应变能变化规律进行监测发现内错距15 m布置下位煤层巷道系最小内错距,试验表明此时上位煤层残留煤柱及下位煤层内错距范围内区段煤柱(W)可保持较好稳定性;现场交子里采区1117工作面采用内错距15 m方式试验性布置巷道,巷道围岩保持较好稳定性。In order to ensure the safe and efficient mining of the multi coal seam face in Xinliu Coal Mine, due to the coal losses caused by roadway layout with 20-metre-wide alternate interior distance in lower coal seam, both laboratory experiment for energy surge and failure mechanism in the pressing process of coal sheet, and energy analysis for internal energy change of sectional coal pillar and its damage to the floor were conducted to determine the reasonable size of sectional coal pillar. The conclusions are as follows： the energy will cause to coal damage while the energy load of coal surged to a maximum, and the sharp release of energy was the essential reason for its sudden failure; according to the internal strain energy of sectional coal pillar obtained by the stress-strain monitoring point, the 15-metre-wide alternate interior distance of roadway layout was the minimum value. In such a circumstance, both the residual pillar in the upper coal seam and section pillar in the alternate interior area of the lower coal seam（W）maintain remarkably stable; the site measurement results show that the surrounding rock of roadway maintains greatly stability while 1117 working face in Jiaozili mining area takes 15 m inner stagger distance to layout the roadway.

关 键 词：区段煤柱 能量释放法 相似模拟 巷道布置 围岩稳定性 

分 类 号：TD322.4[矿业工程—矿井建设]