摘要
为了解决深部高地应力区大变形巷道复修再稳定问题,采用现场测试、实验室试验和理论分析的方式,从多角度分析了小回沟矿巷道变形影响因素,得出:高地应力使围岩卸荷加速;围岩强度低和裂隙发育致使煤岩体结构性滑移、扩容变形增强;顶底板岩层高岭石和伊蒙混层含量分别达到29.36%和17.87%,导致岩层的遇水软化性、崩解特性和膨胀可能性增强。在高地应力区大变形巷道复修稳定控制中采用初喷-浅深注-锚-复喷耦合支护方式,取得了良好的效果。
In order to solve the problem of restability of rehabilitation roadway with large deformation in deep high geostress area,field testing,laboratory test and theoretical analysis were used to analyze the influence factors and mechanical behavior of roadway deformation from multiple angles.It is concluded that the high in-situ stress accelerates the unloading of the surrounding rock;the low strength of the surrounding rock and the development of cracks increase the structural slip and expansion deformation of the coal rock mass;the average content of kaolinite and I/S in the top and bottom rock layers is29.36% and 17.87%,which result in an increased possibility of the softness,disintegration characteristics and swelling potential of the rock formation in water.The sprayed concrete,shallow and deep hole grouting and strong anchor cable combined coupling support method were used in the restability control of rehabilitation roadway in high in-situ stress area,which obtained good results.
作者
刘爱卿
LIU Ai-qing(School of Energy and Mining Engineering,China University of Mining and Technology,Beijing 100083,China;Coal Mining Research Institute Co.,Ltd.of CCTEG,Beijing 100013,China)
出处
《煤炭技术》
CAS
北大核心
2021年第12期75-77,共3页
Coal Technology
基金
天地科技创新创业资金专项项目(2020-TD-QN006)
中煤科工开采研究院有限公司科技创新基金(2020KCMS02)。
关键词
高地应力
松软破碎
再稳定
浅深孔注浆
high geostress
soft and broken
restability
shallow and deep hole grouting
