“刀把”工作面附近孤岛煤柱稳定性分析  

Stability Analysis of Isolated Coal Pillars Near the"Knife Handle"Working Face

作　　者：张经龙 李瑶 戴洪泰 Zhang Jingong;Li Yao;Dai Hongtai(Wenshang Yiqiao Coal Mine Co.,Ltd.,Shandong Jining 272511;College of Resources,Shandong University of Science and Technology,Shandong Tai'an 271019)

机构地区：[1]汶上义桥煤矿有限责任公司,山东济宁272511 [2]山东科技大学资源学院,山东泰安271019

出　　处：《山东煤炭科技》2023年第8期198-200,共3页Shandong Coal Science and Technology

摘　　要：以义桥煤矿已开采“刀把”工作面与接续工作面之间形成的孤岛煤柱为研究对象,采用FLAC^(3D)数值模拟方法研究了采动影响下孤岛煤柱体内应力集中塑性区发育情况。结果表明:接续工作面推至孤岛煤柱时,在三侧应力叠加下煤柱应力高度集中并完全塑性破坏,煤柱易失稳且易诱发冲击地压;随工作面与孤岛煤柱南端距离增大,应力集中程度随之降低,煤柱稳定性逐渐增大,冲击危险性相应减小。Taking the isolated coal pillars formed between the mined"knife handle"working face and the continuous working face in Yiqiao Coal Mine as the research object,the development situation of stress concentration plastic zones in isolated coal pillars under the influence of mining is studied by using FLAC3D numerical simulation method.The results show that when the continuous working face is pushed to the isolated coal pillar,the stress of the coal pillar is highly concentrated and completely plastic broken under the superposition of three side stresses,and the coal pillar is easy to lose stability and induce rock burst;As the distance between the working face and the southern end of the isolated coal pillars increases,the degree of stress concentration decreases,the stability of the coal pillar gradually increases,and the risk of impact decreases accordingly.

关 键 词：孤岛煤柱 煤柱失稳 应力叠加 

分 类 号：TD322[矿业工程—矿井建设]