2304工作面沿空留巷卸压支护控制技术研究  

Research on Pressure Relief Support Control Technology of Gob Side Entry Retaining in the 2304 Working Face

作　　者：田渊 Tian Yuan(Shanxi Lu'an Guozhuang Coal Industry Co.,Ltd.,Shanxi Changzhi 046100)

机构地区：[1]山西潞安郭庄煤业有限责任公司,山西长治046100

出　　处：《山东煤炭科技》2021年第7期73-75,共3页Shandong Coal Science and Technology

摘　　要：针对郭庄煤矿开采过程中巷道顶板变形、开裂等现象,对2304工作面进行水力压裂顶板卸压,同时,对巷旁进行柔模混凝土人工墙支护,对巷内进行沿空留巷高强预应力支护。结果表明:在使用柔模混凝土人工墙和沿空留巷高预应力支护作用下,柔模混凝土人工墙压应力最大为21 MPa,降低了约39.4%,顶底板移近量最大为310 mm,降低了约46.5%,保证了留巷围岩的稳定性,提高了支护的承载力。Aiming at the deformation and cracking of roadway roof during the mining process of Guozhuang Coal Mine,hydraulic fracturing roof pressure relief was carried out on the 2304 working face.At the same time,flexible formwork concrete artificial wall support was carried out beside the roadway,and high-strength prestressed support was carried out in the roadway.The results show that under the action of flexible formwork concrete artificial wall and high prestressed support of gob side entry retaining,the maximum compressive stress of the flexible formwork concrete artificial wall is 21 MPa,which is reduced by about 39.4%,and the maximum displacement of the roof and floor is 310 mm,which is reduced by about 46.5%,which ensures the stability of the surrounding rock and improves the bearing capacity of the support.

关 键 词：沿空留巷 卸压 支护 

分 类 号：TD327.2[矿业工程—矿井建设]