深部长大工作面大区段煤柱宽度研究  

Study on Width of Large Section Coal Pillar in Deep Long and Wide Work Face

作　　者：常春锋 张明[2] 郝杰 杨世纪 刘同达 CHANG Chunfeng;ZHANG Ming;HAO Jie;YANG Shiji;LIU Tongda(Wuyang Mine of Shanxi Lu'An Environmental Energydev.Co.,Ltd.,Changzhi Shanxi 046200,China;State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan Anhui 232001,China)

机构地区：[1]山西潞安环保能源开发股份有限公司五阳煤矿,山西长治046200 [2]安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2023年第3期14-20,共7页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(52104114)。

摘　　要：为了确定五阳煤矿深部长大工作面区段煤柱的宽度,采用理论结合实践的方法,分析不同煤柱宽度条件下覆岩空间结构特征及其对煤柱支承应力影响,提出考虑外部支承应力和内部承载能力的煤柱稳定性评估和宽度确定方法。研究表明,深部长大工作面采空区以触矸线、覆岩移动线为界,可划分得到不同的覆岩空间结构分布;煤柱两侧暂时稳定的“空间结构”是形成煤柱支承应力主要载荷来源;不同煤柱宽度决定了相邻采空区岩层“隔离-接触-贯通”状态及其演化特征;煤柱整体失稳“p-R”判据是平均支承应力p大于平均极限承载强度R。应用成果对该矿深部采区煤柱宽度分析,45m大区段煤柱能够控制覆岩空间结构稳定。In order to determine the width of the coal pillar in the section of the deep and long working face of Wuyang Mine,the method of combining theory with practice was used to analyze the spatial structure characteristics of overlying strata under different coal pillar width conditions and its influence on the supporting stress of coal pillar,and the stability evaluation and width determination method of coal pillar considering external supporting stress and internal bearing capacity was proposed.The research showed that the goaf of deep long and large working face was able to be divided into different spatial structure distribution of overlying strata by taking the contact gangue line and the movement line of overlying strata as the boundary.The temporary stable space structure'on both sides of the coal pillar was the main load source to form the supporting stress of the coal pillar.Different coal pillar widths determined the isolation-contact-penetration'state and evolution characteristics of adjacent goaf strata.The“p-R”criterion for the overall instability of the coal pillar was that the average supporting stress p was greater than the average ultimate bearing strength R.The results were applied to analyze the width of the coal pillar in the deep mining area of Wuyang Mine,and the coal pillar in the 45m large section could control the stability of the overlying spatial structure.

关 键 词：深部开采 覆岩空间结构 区段煤柱 宽度 稳定性 

分 类 号：TD325[矿业工程—矿井建设]