刘少伟，米超，贺德印，等.三软厚煤层工作面回采巷道超前“卸-支”协同围岩控制技术与应用［J］.河南理工大学学报（自然科学版），doi:10.16186/j.cnki.1673-9787.2024060008

LIU S W，MI C，HE D Y，et al. Surrounding rock control technology and application with synergetic pressure relief and support for advanced supporting section of Three-Soft Mining Roadway in thick coal seam［J］.Journal of Henan Polytechnic University（Natural Science），doi: 10.16186/j.cnki.1673-9787.2024060008

三软厚煤层工作面回采巷道超前“卸-支”协同围岩控制技术与应用(网络首发)

刘少伟^1,2，米超¹，贺德印¹，李小鹏¹

（1.河南理工大学 能源科学与工程学院，河南 焦作 454000；2.煤炭安全生产与清洁高效利用省部共建协同创新中心，河南 焦作 4540000）

摘要: [目的] 为解决三软厚煤层综放工作面回采巷道超前支护区域存在围岩应力集中、超前支护工序繁琐且支护效果差、工作面推进慢等问题， [方法] 以赵家寨煤矿12203工作面胶带运输巷为背景，利用数值模拟方法分析工作面回采巷道超前支护区域围岩应力集中程度影响因素，并开展最佳切顶方案和超前锚索补强支护方案研究。[结果] 结果表明：工作面超前和侧向支承压力与回采巷道开挖形成的侧向支承压力叠加，叠加应力对回采巷道超前支护区域围岩应力集中程度影响显著；通过数值模拟方法证明了“切顶”能够从回采巷道围岩应力转移、改变采场荷载分布情况、卸压3个方面有效缓解回采巷道超前支护区域围岩应力集中情况，最终确定切顶角度10°、深度18 m为最佳方案，同时明确了最佳超前锚索补强支护方案；在赵家寨煤矿12203工作面胶带运输巷进行工业性试验，有效降低回采巷道围岩应力，取消了工作面回采巷道超前被动支护，保证了巷道正常工作。 [结论] 回采巷道超前“卸-支”协同围岩控制技术能够有效卸压、补强支护，保障回采巷道安全稳定的同时又保证了工作面安全快速回采。

关键词: 切顶卸压；应力转移；超前支护；围岩控制

中图分类号：TD323

doi: 10.16186/j.cnki.1673-9787.2024060008

基金项目:中原科技创新领军人才项目（244200510013）；河南省高校科技创新团队项目资助（23IRTSTHN007）；国家自然科学基金资助项目（52074102）；教育部实验教学和教学实验室建设研究项目（SYJX2024-131）

收稿日期：2024-06-05

修回日期：2024-09-23

网络首发日期：2024-11-01

Surrounding rock control technology and application with synergetic pressure relief and support for advanced supporting section of Three-Soft Mining Roadway in thick coal seam

LIU Shaowei^1,2，MI Chao¹，HE Deyin¹，LI Xiaopeng¹

(1.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo 454000，Henan，China；2.State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization，Jiaozuo 454000，Henan，China)

Abstract: [Objective] In order to solve the problems of concentrated stress in surrounding rock, cumbersome advanced support process and poor support effect, and slow progress of the working face in the advanced support area of the mining roadway of the three soft and thick coal seam fully mechanized coal seams. [Methods] Based on the background of the belt transportation roadway of the 12203 working face of Zhaojiazhai Coal Mine, the influencing factors of the stress concentration of the surrounding rock in the advanced support area of the mining roadway

of the working face were analyzed by numerical simulation, and the research on the optimal roofing scheme and the reinforcement support scheme of the advanced anchor cable was carried

out. [Results] The results show that the superposition of the forward and lateral support pressures of the working face and the lateral support pressure formed by the excavation of the mining roadway has a significant impact on the stress concentration of the surrounding rock in the advanced support area of the mining roadway. Numerical simulation proves that "roof cutting" can effectively alleviate the stress concentration of surrounding rock in the advanced support area of the mining roadway from three aspects: stress transfer of surrounding rock in the mining roadway, changing the stope load distribution method, and pressure relief.Finally, it was determined that the topping angle of 10°and the topping depth of 18m was the best scheme, at the same time, the best reinforcement support scheme for the advanced anchor cable is clarified. The industrial test was carried out in the belt transportation roadway of the 12203 working face of Zhaojiazhai Coal Mine, which effectively reduced the stress of the surrounding rock of the mining roadway, canceled the advanced passive support of the mining roadway of the working face,and ensured the normal operation of the roadway. [Conclusion] The advanced "unloading-supporting" collaborative surrounding rock control technology of the mining roadway can effectively relieve pressure and strengthen the support, ensure the safety and stability of the mining roadway, and ensure the safe and rapid mining of the working face.

Key words: roof cutting and pressure relief; stress transfer; advance support; surrounding rock control

CLC: