综放特厚煤层沿空巷道围岩控制技术研究  

Study on Surrounding Rock Control of Gob-side Roadway in Fully Mechanized Top Coal Caving with Extra Thick Coal Seam

作　　者：牛风卫 谢福星 孙迪 NIU Fengwei;XIE Fuxing;SUN Di(Madaotou Coal Industry Co.,Ltd.,Jinneng Holding Coal Mine Group,Datong 037003,China;Beijing China Coal Mine Engineering Co.,Ltd.,Beijing 100013,China;National Engineering Research Center of Deep Shaft Construction,Beijing 100013,China)

机构地区：[1]晋能控股煤业集团马道头煤业有限责任公司,山西大同037003 [2]北京中煤矿山工程有限公司,北京100013 [3]矿山深井建设技术国家工程研究中心,北京100013

出　　处：《煤炭技术》2023年第4期68-72,共5页Coal Technology

基　　金：天地科技“公司其他内部研发项目”基金(KJ-2021-JJZD-10)。

摘　　要：为解决特厚煤层沿空巷道围岩变形破坏严重的难题,以马道头矿8209特厚煤层工作面沿空回采巷道为例,运用UDEC数值模拟软件分析了巷道采空侧覆岩结构的形成及运动规律,阐明了不同阶段上区段采空区侧向支承压力的分布特征及对布置巷道区域煤体的影响,分析了5209沿空巷道在经受二次采动影响条件下围岩的破坏机理,提出了针对性不对称控制对策。研究结果表明:马道头矿5209沿空巷道顶板采用“桁架组合梁+高强长锚杆”支护系统对顶板围岩进行深-浅结合、不对称性控制,煤柱帮采用“高强长锚杆+短锚索”进行强化控制,沿空巷道围岩和支护结构不对称破坏状况得到改善,对类似特厚煤层沿空巷道围岩控制具有借鉴意义。In order to solve the problem of serious deformation and damage of surrounding rock of gob�side roadway in extra thick coal seam,taking the gob-side roadway of 8209 working face in Madaotou mine as an example,the formation and movement law of gob-side overburden structure are analyzed by using UDEC numerical simulation software,and the distribution characteristics of lateral abutment pressure in upper goaf at different stages and its influence on coal body in roadway arrangement area are expounded.The failure mechanism of surrounding rock of 5209 gob-side roadway under the influence of secondary mining is analyzed.The targeted asymmetric control countermeasures are put forward.The results show that the roof of 5209 gob-side roadway in Madaotou mine adopts"truss composite beam+high-strength long bolt"support system to control the depth shallow combination and asymmetry of roof surrounding rock.The coal pillar adopts"high-strength long bolt+short anchor cable"to strengthen the control.The asymmetric failure of surrounding rock and support structure of gob-side roadway has been improved,which can be used as a reference for the surrounding rock control of gob-side roadway in similar extra thick coal seam.

关 键 词：特厚煤层 沿空巷道 侧向支承压力 不对称 针对性控制 

分 类 号：TD353[矿业工程—矿井建设]