转龙湾矿浅埋薄基岩二次采动巷道围岩应力演化规律研究  

Study on Stress Evolution Law of Surrounding Rock of Roadway under Secondary Mining in Shallow Buried Thin Bedrock in Zhuanlongwan Mine

作　　者：齐俊铭 钱德雨[2] 崔琦 高波 焦河喜 杨兴国 缐桂宏 邓金平 QI Junming;QIAN Deyu;CUI Qi;GAO Bo;JIAO Hexi;YANG Xingguo;XIAN Guihong;DENG Jinping(Ordos Zhuanlongwan Coal Co.,Ltd.,Ordos 017000,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]鄂尔多斯市转龙湾煤炭有限公司,内蒙古鄂尔多斯017000 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤炭技术》2022年第12期15-18,共4页Coal Technology

基　　金：国家自然科学基金项目(51704277);陕西省自然科学基础研究计划企业联合基金项目(2019JLZ-04)。

摘　　要：为揭示浅埋薄基岩二次采动巷道围岩应力演化规律,以转龙湾矿23204辅运顺槽为工程背景,建立FLAC3D数值模型,研究了23204辅运顺槽受一次采动和二次采动影响时煤层顶板的应力分布规律。对沿煤层倾向方向的采动应力演化规律进行分析,发现二次开采扰动影响更加剧烈;煤柱宽度为19 m时,煤柱内的应力集中程度大于实体煤侧,应力集中系数最高达到4.48;对沿煤层走向方向的采动应力演化规律分析结果表明:23204辅运顺槽前方的应力峰值随着23205工作面的推进而增大,煤柱侧应力峰值超前工作面25 m左右。研究成果为浅埋薄基岩煤层开采时的巷道布置、巷道支护以及煤柱宽度留设等问题的研究提供了理论基础。In order to reveal the stress evolution law of surrounding rock of secondary mining roadway in shallow buried thin bedrock, FLAC3Dnumerical model was established based on the engineering background of 23204 auxiliary haulage gateway in Zhuanlongwan mine, and the stress distribution law of coal seam roof under the influence of primary mining and secondary mining was studied. The evolution law of mining stress along the dip direction of the coal seam is analyzed. It is found that the influence of secondary mining disturbance is more intense. When the coal pillar is left 19 m, the stress concentration degree in the coal pillar is greater than that in the solid coal side, and the highest stress concentration coefficient reaches 4.48. The evolution law of mining stress along the strike direction of the coal seam is analyzed. The results show that the peak stress in front of the auxiliary transport trough23204 increases with the mining of working face 23205, and the peak stress at the coal pillar side is about 25 m ahead of the working face. The research results provide a theoretical basis for the study of roadway layout, roadway support and the width of coal pillar during the mining of shallow-buried thin bedrock coal seams.

关 键 词：浅埋 薄基岩 二次采动 采动应力 应力演化规律 

分 类 号：TD32[矿业工程—矿井建设]