厚直接顶支架切顶沿空留巷稳定性分析  

Stability Analysis of Gob Side Entry Retaining with Thick Immediate Roof in Cutting Roof by Roadside Support

作　　者：吴晓宇 周豪 吴晓伟 WU Xiaoyu;ZHOU Hao;WU Xiaowei(Shanxi Datong University,Datong 037009,China;Yongdingzhuang Coal Industry Co.,Ltd.,Jinneng Holding Coal Group,Datong 037000,China)

机构地区：[1]山西大同大学,山西大同037009 [2]晋能控股煤业集团永定庄煤业有限责任公司,山西大同037000

出　　处：《煤炭技术》2024年第5期65-69,共5页Coal Technology

基　　金：山西大同大学基础青年科研基金资助项目(2022Q17);山西省高等学校科技创新计划资助项目(2022L447);山西省教育科学规划“十四五”规划课题资助项目(GH-220556)。

摘　　要：针对厚直接顶切顶沿空留巷采空帮大变形问题,通过建立厚直接顶支架切顶沿空留巷矸石自成巷旁承载力学模型和结合现场实测,得到矸石巷旁支护水平侧压及支承压力作用机理,表现为:(1)采空区侧厚直接顶破断为倾斜断面,垮落矸石沿倾斜断面分布并形成矸石巷旁支护;(2)采空区侧厚直接顶破断前,矸石巷旁支护侧向压力主要为矸石自重引起,破断后,主要影响因素增加了上部载荷和断裂基本顶荷载,其最大矸石巷旁支护侧向压力增大41%,最大矸石巷旁支护支承压力增大49%;(3)矸石巷旁支护和巷旁切顶支架联合支护顶板,使其更好地适应巷道采空帮围岩剧烈变形,为相似条件下的留巷提供了理论及技术借鉴。For the thick immediate roof along gob side entry retaining surrounding rock of gob deformation problem,through the establishment of the bearing capacity model of self-formed gob roadway in cutting roof by roadside support with thick immediate roof along gob side entry retaining and combined with field measurements,to get the gangue gob roadside support horizontal lateral pressure and support pressure mechanism,manifested as follows:(1)the thick immediate roof had cut off to form the inclined plane as soon as the area of gob had been bearing capacity on the thick direct inclined plane;(2)the main force acting on the loading area of gob is by the self-weight of gob before cutting off the thick immediate roof near the god side;the main force factor acting on the loading area of gob increase the pressure of upper load and the pressure of fractured roof after cutting off the thick immediate roof,the lateral pressure of the maximum gob bearing area increases by 41%and the abutment pressure of the maximum gob bearing area increases by 49%;(3)the combined support make up of gob bearing area and roof cutting support in roadside which make it better adapt to the severe deformation of surrounding rock of gob.It had provided a theoretical and technical reference for similar conditions of gob-side entry retaining.

关 键 词：沿空留巷 厚直接顶 矸石巷旁支护 水平侧压 支承压力 

分 类 号：TD353[矿业工程—矿井建设]