煤炭科技2024，Vol.45Issue(3)：7-10,18,5.DOI:10.19896/j.cnki.mtkj.2024.03.002
集中荷载作用下复合顶板工作面围岩失稳机理与控制
Instability mechanism and control of surrounding rock in composite roof working face under concentrated load
摘要
Abstract
The downward mining method of multiple coal seams layer by layer,when the distance between the coal seams is relatively close or the roof of the lower coal seam is a composite roof,the concentrated load of the residual coal pillars in the upper coal seam will have a significant impact on the control of the roof of the lower coal seam working face.Through theoretical analysis,numerical simula-tion,on-site testing and verification,the characteristics of mine pressure manifestation in the composite roof working face under concen-trated load were obtained.It was believed that there was a phenomenon of large and small periodic pressure in the working face below the goaf,while the pressure in the area below the coal pillar was generally low,and the pressure characteristics were unclear.Further a-nalysis suggested that the core of controlling the surrounding rock of loose composite roof was to control the early separation and deform-ation of the roof,and the given deformation pressure of the support on this type of direct roof should be much greater than its intact state.A method for determining the supporting strength of composite roof working face under concentrated load and shallow hole grouting technology for surrounding rock control in the stress affected area of coal pillars were proposed,providing a basis for controlling the sur-rounding rock of composite roof working face under concentrated load.关键词
集中载荷/复合顶板/围岩控制/片帮冒顶/支护强度Key words
concentrated load/composite roof/surrounding rock control/rib spalling and roof fall/supporting strength分类
矿业与冶金引用本文复制引用
张学亮..集中荷载作用下复合顶板工作面围岩失稳机理与控制[J].煤炭科技,2024,45(3):7-10,18,5.基金项目
国家自然科学基金面上项目(52274161) （52274161）
煤炭工业规划设计研究院有限公司科技发展基金(博士创新基金)项目(GHYKY-ZL-2023-0002) （博士创新基金）
