强采动巷道围岩应力演化规律研究  

Study on the Stress Evolution Law of Surrounding Rock in Strong Mining Roadway

作　　者：李云 Li Yun(Shanxi Lingzhida Coal Industry Co.,Ltd.,Changzhi Shanxi 046000,China)

机构地区：[1]山西凌志达煤业有限公司,山西长治046000

出　　处：《山西冶金》2024年第8期128-130,共3页Shanxi Metallurgy

摘　　要：为了解决强动压下巷道围岩失稳的问题,利用数值模拟软件对辅助顺槽受扰动应力及位移进行分析发现,当辅运顺槽受到一次采动时,巷道顶板应力峰值小于煤柱应力峰值,煤柱的应力峰值为23.19 MPa,在二次采动影响下,煤柱应力峰值达到27.49 MPa,且二次采动相较一次采动下的煤柱应力集中有了一定扩展。同时辅运顺槽受二次采动的影响,距离工作面越小,相应的位移变形量越大,巷道顶板、底板、煤柱帮、实体煤帮的最大变形量分别为465 mm、101 mm、737 mm和216 mm。对原支护方案进行补强,经过卸压补强后支撑应力峰值为20.35 MPa,应力峰值降低了9.43%。In order to solve the problem of instability of surrounding rock in tunnels under strong dynamic pressure,numerical simulation software was used to analyze the disturbed stress and displacement of the auxiliary chute.It was found that when the auxiliary chute was subjected to a single mining operation,the peak stress of the tunnel roof was lower than that of the coal pillar,with a peak stress of 23.19 MPa.Under the influence of a secondary mining operation,the peak stress of the coal pillar reached 27.49 MPa,and the stress concentration of the coal pillar under a secondary mining operation was somewhat expanded compared to that under a primary mining operation.At the same time,the auxiliary transportation channel is affected by secondary mining,and the smaller the distance from the working face,the greater the corresponding displacement deformation.The maximum deformation of the roadway roof,floor,coal pillar support,and solid coal support are 465 mm,101 mm,737 mm,and 216 mm,respectively.The original support scheme was reinforced,and after pressure relief and reinforcement,the peak support pressure was 20.35 MPa,and the peak stress was reduced by 9.43%.

关 键 词：数值模拟 二次采动 支护补强 应力峰值 

分 类 号：TD353[矿业工程—矿井建设]