大采高迎采巷道矿压显现规律及顶帮协同补强支护技术研究  

Research on Law of Mine Pressure Behaviour of Roadway with Facing Large Mining Height and Roof-Slope Synergistic Reinforcement Support Technology

作　　者：邸旭峰 张百胜[1] 郭俊庆[2] 陈立虎 杨志平 张钊 DI Xufeng;ZHANG Baisheng;GUO Junqing;CHEN Lihu;YANG Zhiping;ZHANG Zhao(School of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Laboratory of In-situ Property-improving Mining of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;China Three Gorges Corporation,Chengdu 610000,China)

机构地区：[1]太原理工大学矿业工程学院,太原030024 [2]太原理工大学原位改性采矿教育部重点实验室,太原030024 [3]中国长江三峡集团有限公司,成都610000

出　　处：《煤炭技术》2022年第10期44-48,共5页Coal Technology

基　　金：山西省重点研发计划(201903D121075);山西省高等学校科技成果转化培育项目(JYT2019015);山西省应用基础研究计划面上项目(20210302123148)。

摘　　要：针对马堡煤矿15201大采高迎采巷道围岩变形破坏严重、支护构件易失效等问题,通过监测表面位移和围岩内部破坏特征,结合FLAC^(3D)数值模拟,分析了该类巷道的围岩变形与支承压力动态演化规律,揭示了变形破坏机理,提出了“顶帮协同补强”的围岩控制技术。结果表明:(1)迎采巷道受采动影响主要集中在工作面前方55 m至后方155 m范围,经历支承压力起始阶段、支承压力快速升高阶段、支承压力峰值波动阶段、支承压力稳定4个阶段;(2)变形破坏机理:受侧向支承压力影响,巷道围岩应力集中且呈非对称性;泥岩伪顶自身强度低,以及支护方案及其参数不合理;(3)提出“顶帮协同补强”支护控制技术,具体为顶板通过使用φ21.8 mm的高强度锚索,同时增大支护密度,有效提升顶板支护强度;煤柱帮通过使用φ15.24 mm的锚索,加强煤柱帮侧向支护阻力作用,强化煤柱的承载作用。采用该技术后,巷道围岩稳定性得到明显改善。Aiming at the problems of serious deformation and damage of surrounding rock and easy failure of supporting components of the 15201 high mining height of the roadway in Mabao coal mine,the deformation and support of the surrounding rock of this type of roadway are analyzed by monitoring the surface displacement and the internal failure characteristics of the surrounding rock,combined with FLAC^(3D) numerical simulation.The dynamic evolution law of pressure reveals the mechanism of deformation and failure,and proposes the surrounding rock control technology of"top-side synergistic reinforcement".The results show that:(1)the impact of the mining roadway is mainly concentrated in the range from 55 m in front of the working face to 155 m behind the work;(2)the deformation failure mechanism is:affected by the lateral support pressure,the stress of the surrounding rock of the roadway is concentrated and asymmetric;the false roof itself is low in strength,and the support scheme and its parameters are unreasonable;(3)the support control technology of"top-side synergistic reinforcement"is proposed.Specifically,the roof uses aφ21.8 mm high-strength anchor cable while increasing the support density,effectively enhance the strength of roof support;the coal pillar siding usesφ15.24 mm anchor cables to strengthen the lateral support resistance of the coal pillar siding and strengthen the bearing effect of the coal pillars.After using this technology,the stability of the surrounding rock of the roadway has been significantly improved.

关 键 词：大采高工作面 迎采巷道 矿压显现规律 顶帮协同补强支护 

分 类 号：TD322[矿业工程—矿井建设] TD353