坚硬顶板小煤柱沿空掘巷切顶卸压关键参数研究  

Study on key parameters of roof cutting and pressure relief in small coal pillar gob-side entry driving with hard roof

作　　者：谭雅五 赵光明[1] 程详[1,2] 孟祥瑞[1] 王艳芬[3] 朱世奎 TAN Yawu;ZHAO Guangming;CHENG Xiang;MENG Xiangrui;WANG Yanfen;ZHU Shikui(State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mine,Anhui University of Science and Technology,Huainan Anhui 232001,China;Post-Doctoral Research Station,Huainan Mining Industry(Group)Co.,Ltd.,Huainan Anhui 232001,China;School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China;Huaibei Mining Co.,Ltd.,Huaibei Anhui 235000,China)

机构地区：[1]安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,安徽淮南232001 [2]淮南矿业(集团)有限责任公司博士后科研工作站,安徽淮南232001 [3]安徽理工大学材料科学与工程学院,安徽淮南232001 [4]淮北矿业股份有限公司,安徽淮北235000

出　　处：《中国安全生产科学技术》2025年第2期99-107,共9页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(52474090,52374074,52204082);国家重点研发计划项目(2023YFC2907600);安徽省重大科技专项项目(202203a07020011);安徽省高校协同创新项目(GXXT-2021-075)。

摘　　要：为了解决小煤柱沿空掘巷过程中区段煤柱矿压显现剧烈的问题。采用理论分析、数值模拟和灰色关联度相结合的方法,探讨小煤柱沿空掘巷切顶卸压应力调控机理,分析不同参数条件下小煤柱围岩应力场的分布特征。研究结果表明:在选取的切顶角度范围内,巷道围岩支承压力随着切顶角度增加先减小后增大。选取不同切顶位置,通过不同切顶角度得出的支承压力对比可知,采空区侧切顶比巷道侧切顶效果好。切顶高度越高,切顶效果越好,在切顶超过27 m且随着切顶高度的增加,围岩所受支承压力会继续降低,但其降低程度将逐渐减小。通过切顶与不切顶条件下煤柱的支承压力对比,切顶后的支承压力降低,巷道变形量减小,围岩变形得到有效的控制,切顶效果明显。通过灰色关联度分析得出影响小煤柱沿空掘巷切顶卸压效果的主要因素是煤柱宽度。研究结果可为沿空掘巷围岩应力调控技术提供参考。In order to solve the problem of severe mine pressure appearance of section coal pillar in the process of small coal pillar gob-side entry driving,the method combining the theoretical analysis,numerical simulation and grey relational analysis was used to discuss the stress regulation mechanism of roof cutting and pressure relief in the small coal pillar gob-side entry driving,and the distribution characteristics of surrounding rock stress field of small coal pillar under different parameter conditions were analyzed.The results show that in the selected range of roof cutting angle,the abutment pressure of surrounding rock of roadway decreases first and then increases with the increase of roof cutting angle.By selecting different roof cutting positions and comparing the abutment pressure obtained from different roof cutting angles,it can be seen that the effect of roof cutting on goaf side is better than that on roadway side.The higher the roof cutting height is,the better the roof cutting effect is.When the roof cutting height is more than 27 m and with the increase of roof cutting height,the abutment pressure of surrounding rock will continue decrease,but the degree of reduction will gradually decrease.By comparing the abutment pressure of coal pillar under the condition of roof cutting and non-roof cutting,the abutment pressure after roof cutting is reduced,the deformation of roadway is reduced,the deformation of surrounding rock is effectively controlled,and the effect of roof cutting is obvious.Through the grey relational analysis,it is concluded that the main factor affecting the effect of roof cutting and pressure relief in small coal pillar gob-side entry driving is the width of coal pillar.The research results can provide reference for the stress regulation technology of surrounding rock in gob-side entry driving.

关 键 词：沿空掘巷 切顶卸压 小煤柱 坚硬顶板 灰色关联度分析 

分 类 号：X936[环境科学与工程—安全科学] TD322[矿业工程—矿井建设]