Comparison of large deformation failure control method in a deep gob-side roadway: A theoretical analysis and field investigation

作     者：WANG Jiong LIU Peng HE Man-chao LIU Yi-peng DU Chang-xin WANG Jiong;LIU Peng;HE Man-chao;LIU Yi-peng;DU Chang-xin

作者机构：State Key Laboratory for Geomechanics and Deep Underground EngineeringChina University of Mining and Technology(Beijing)Beijing 100083China School of Mechanics and Civil EngineeringChina University of Mining and Technology(Beijing)Beijing 100083China 

出 版 物：《Journal of Mountain Science》 (山地科学学报(英文))

年 卷 期：2023年第20卷第10期

页      面：3084-3100页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：funded by National Natural Science Foundation of China(52074300) Yueqi Young Scholars Project of China University of Mining and Technology Beijing(2602021RC84) China University of Mining and Technology(Beijing)fundamental scientific research funds—Doctoral students Top-notch Innovative Talents Fostering Funds(BBJ2023047) Guizhou Provincial Science and Technology Planning Project(2Y030) 

主　　题：Deep gob-side roadway Deformation failure control Roof structure mechanical model Stress field distribution Mining safety .Failure mode. 

摘      要：Under the dual influence of the mining disturbance of the previous working face and the advanced mining of the working face,the roadway is prone to large deformation,failure,and *** stabilization has always significantly influenced deep mining *** this article we used the research background of the large deformation failure roadway of Fa-er Coal Mine in Guizhou Province of China to propose two control methods:bolt-cable-mesh+concrete blocks+directional energy-gathering blasting(BCM-CBDE method)and 1st Generation-Negative Poisson’s Ratio(1G NPR)cable+directional energy-gathering blasting+dynamic pressure stage support(πgirder+single hydraulic prop+retractable U steel)(NPR-DEDP method).Meantime,we compared the validity of the large deformation failure control method in a deep gob-side roadway based on theoretical analysis,numerical simulations,and field *** results show that directional energy-gathering blasting can weaken the pressure acting on the concrete ***,the vertical stress of the surrounding rock of the roadway is still concentrated in the entity coal side and the concrete blocks,showing a’bimodal’***-CBDE method cannot effectively control the stability of the ***-DEDP method removed the concrete *** shows using the 1G NPR cable with periodic slipping-sticking characteristics can adapt to repeated mining *** peak value of the vertical stress of the roadway is reduced and transferred to the deep part of the surrounding rock mass,which promotes the collapse of the gangue in the goaf and fills the *** pressure of the roadway roof is reduced,and the gob-side roadway is fundamentally ***,the dynamic pressure stage support method withπgirder+single hydraulic prop+retractable U steel as the core effectively protects the roadway from dynamic pressure impact when the main roof is periodically *** the on-site implementation of NPR-DEDP method,the deformation