急倾斜巨厚煤层巷道围岩扰动的掘进速度效应研究  

Study on Tunneling Speed Effect of Roadway Surrounding Rock Disturbance in Steeply Inclined Super-thick Coal Seam

作　　者：胡国建 王雪涛 刘旭东 毕芮铭 苌玉 HU Guojian;WANG Xuetao;LIU Xudong;BI Ruiming;CHANG Yu(Xinjiang Energy Co.,Ltd.,CHN Energy,Urumqi 830000,China;College of Energy Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)

机构地区：[1]国家能源集团新疆能源有限责任公司,乌鲁木齐830000 [2]西安科技大学能源学院,西安710054

出　　处：《煤炭技术》2024年第12期29-34,共6页Coal Technology

摘　　要：针对乌东煤矿的巷道快速掘进问题,采用数值模拟实验方法,对巷道掘进速度影响的塑性区、应力、应变能密度变化规律进行研究,并进行现场工业实践应用,研究结果表明:(1)急倾斜煤层巷道靠近岩层侧已经发生张拉、剪切混合破坏范围随着掘进速度的增大而增大。(2)巷道掘进速度的提升使得巷道两帮的应力集中区域范围逐渐增加,同时巷道迎头位置的单应力集中区域逐渐过渡为双应力集中区域,其巷道掘进速度由8 m/d提升至12、16 m/d的超前支承压力增幅分别为0.57%和1.15%,应变能密度增幅分别为1.39%和2.77%。(3)掘进速度与地音能量、频次相关性较好,地音能量、频次随着掘进速度提升而升高,当掘进速度稳定时日平均能量小幅降低,掘进速度提升使得煤岩活动变强,应力调整变快。In response to the rapid tunneling problem of roadway in Wudong coal mine,numerical simulation experiments were used to study the plastic zone,stress,and strain energy density changes affected by roadway tunneling speed,and on-site industrial practice applications were carried out.The research results showed that:(1)The range of tensile and shear mixed failure near the rock layer side of the steeply inclined coal seam tunnel increased with the increase of excavation speed.(2)The increase in roadway tunneling speed gradually increases the range of stress concentration areas on both sides of the roadway.At the same time,the single stress concentration area at the front of the roadway gradually transitions to a double stress concentration area.The advance support pressure increases from 8 m/d to 12 m/d and 16 m/d,respectively,by 0.57%and 1.15%,and the strain energy density increases by 1.39%and 2.77%.(3)The correlation between tunneling speed and ground sound energy and frequency is good.Ground sound energy and frequency increase with the increase of tunneling progress.When the tunneling progress stabilizes,the daily average energy slightly decreases.The increase in tunneling speed leads to stronger coal rock activity and faster stress adjustment.

关 键 词：急倾斜煤层 巷道掘进 数值模拟 地音监测 

分 类 号：TD324[矿业工程—矿井建设]