迎采动掘进巷道围岩应力演化规律及分段控制技术  

Stress evolution law and sectional control technology of surrounding rock in heading for adjacent advancing working face

作　　者：从常奎 李瑞武 孙亚超 高利利 CONG Changkui;LI Ruiwu;SUN Yachao;GAO Lili(China Coal Science&Technology Ecological Environment Technology Co.,Ltd.,Xi’an 710054,China;College of Energy Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Shaanxi Energy Zhaoshipan Mining Operation Co.,Ltd.,Yulin 719100,China)

机构地区：[1]中煤科工生态环境科技有限公司,陕西西安710054 [2]西安科技大学能源学院,陕西西安710054 [3]陕西能源赵石畔矿业运营有限责任公司,陕西榆林719100

出　　处：《西安科技大学学报》2024年第6期1071-1082,共12页Journal of Xi’an University of Science and Technology

基　　金：陕西省重点研发计划(2023-YBGY-318);自然资源部重点实验室开放课题(2022-06)。

摘　　要：为了掌握迎采动掘进巷道围岩应力演化规律,确定合理的支护方式,提升巷道支护效果,以某矿综采工作面相邻运输巷为工程背景,采用理论分析、数值模拟和工业性试验等方法,系统分析了缓慢变形阶段、超前采动影响阶段、剧烈影响阶段、结构调整阶段及变形稳定阶段影响时围岩变形特征,提出了巷道围岩分段控制技术。结果表明:回采工作面与相邻掘进工作面相遇前50 m以外,巷道受掘进扰动影响,两工作面相遇前50~20 m,巷道受采动影响逐渐增大;两工作面相遇前20 m至相遇后10 m,巷道受采动影响大,围岩变形剧烈,应加强应力剧烈调整过程中巷道支护;相遇后10~50 m,窄煤柱帮变形剧烈;相遇后50~100 m,掘进工作面逐渐远离回采工作面,巷道受采动影响逐渐减小。两工作面相遇前后100 m范围是巷道围岩控制的关键区域,采用高强度锚杆+锚索联合支护,巷道围岩控制效果良好。In order to grasp the stress evolution law of surrounding rock of heading for adjacent advancing roadway,determine reasonable support method and improve support effect of the roadway,taking the adjacent transportation roadway of fully mechanized mining face in a mine as engineering background,the deformation characteristics of surrounding rock in slow deformation stage,influence stage of advanced mining,severe influence stage,structural adjustment stage and deformation stability stage were analyzed by means of theoretical analysis,numerical simulation and industrial test,and the technology of surrounding rock subsection control is put forward.The results show that:The roadway is affected by the excavation disturbance more than 50 m before the meeting between mining face and adjacent excavation face.In the 50~20 m before the two working faces meet,the roadway is gradually affected by mining.From 20 m before the two working faces meet to 10 m after the two working faces meet,the roadway is greatly affected by mining,the surrounding rock is deformed violently,so the roadway support should be strengthened in the process of severe stress adjustment;10~50 m after the encounter,the narrow coal pillar is deformed violently;50~100 m after the meeting,the excavation face is gradually far away from the mining face,and the influence of the roadway is gradually reduced.The 100 m range before and after the meeting of the two working faces is the key area for stable control of the surrounding rock in the roadway,the combined support of high strength bolt and anchor cable is adopted,and the control effect of roadway surrounding rock is good.

关 键 词：迎采动 沿空掘巷 应力演化 分段控制 巷道支护 

分 类 号：TD353[矿业工程—矿井建设]