采区上山保护煤柱留设尺寸研究  

Study on Size of Coal Pillars Retained in Uphill Mining Areas

作　　者：马宁 张国龙 贾江锋 束佳明 张臣 MA Ning;ZHANG Guo-long;JIA Jiang-feng;SHU Jia-ming;ZHANG Chen(College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《煤炭技术》2018年第9期95-98,共4页Coal Technology

基　　金：国家自然科学基金青年项目(51704182);山东省自然科学基金项目(ZR2017BEE050)

摘　　要：以山东某矿1301采区为工程背景,采用FLAC3D数值模拟软件,研究了13011及13012工作面回采过程中,煤巷轨道上山及岩巷运输上山保护煤柱的塑性区、支承应力演化规律。研究表明:13011工作面单翼回采时,工作面回采至距煤巷轨道上山40 m后,煤巷轨道上山出现塑性破坏和应力峰值急剧增加现象;13012工作面回采至距岩巷运输上山30 m后,运输上山出现明显的应力叠加现象,应力峰值急剧增加;煤巷轨道上山保护煤柱留设40 m及岩巷运输上山保护煤柱留设30 m时,可有效控制巷道的围岩变形,为合理留设上山保护煤柱、提高煤矿工作面安全回采率提供参考依据。Based on the FLAC^3D numerical simulation software, the plastic zone and lead abutment pressure evolution law of the protective coal pillar of which the coal roadway of rail uphill and the rock roadway of transport uphill in the 13011 and 13012 working face mining process are studied in the engineering background of 1301 mining area in a coal mine in Shandong province. Research shows that the 13011 working face of single-wing mining, mining coal roadway from the rail uphill 40 m, roadway rail uphill plastic damage and the peak stress increases sharply; face to the roadway 13012 working distance transport up to 30 m, transport uphill has an obvious stress superposition phenomenon and peak stress increase sharply. The deformation of the surrounding rock of the roadway can be effectively controlled when the coal pillar is up to 40 m and the rock pillar is up to 30 m,which can improve the safe mining rate of coal mining working face to provide reference.

关 键 词：保护煤柱 数值模拟 塑性区 超前支承应力 

分 类 号：TD823.5[矿业工程—煤矿开采]