特殊地质条件下沿空留巷围岩综合治理技术研究  

Research on comprehensive treatment technology of surrounding rocks along gob-side entry retaining under special geological conditions

作　　者：田虎雄 TIAN Huxiong(Jinjie Coal Mine,China Energy Shendong Coal Group Co.,Ltd.,Yulin,Shaanxi 719319,China)

机构地区：[1]国能神东煤炭集团有限责任公司锦界煤矿,陕西省榆林市719319

出　　处：《中国煤炭》2024年第S01期284-290,共7页China Coal

摘　　要：为保证在顶板破碎特殊地质条件下,留巷和复用巷道的效果,以锦界煤矿31117工作面为研究背景,通过建立上覆岩层结构模型,确立以补强支护、加大支护密度、多种支护手段相结合的支护思路。留巷期间通过补强支护、加宽砼墙宽度等手段来保证留巷稳定性;复用期间通过增设液压支架、联巷顶板补强支护等措施来保证工作面正常回采。矿压结果表明,支护强度的增加可有效保证留巷期间的砼墙成型效果,矿压显现不明显;复用期间矿压显现较为剧烈,砼墙变形较正常区域变化明显,顶板下沉量增加至850 mm,通过采取多种支护形式,最终确保工作面的正常回采。In order to ensure the effectiveness of retaining and reusing tunnels under the special geological conditions of roof fragmentation,taking the 31117 working face of Jinjie Coal Mine as the research background,a structural model of the overlying rock layer was established to confirm a support concept that combines strengthening support,increasing support density,and multiple support methods.During the retention period,measures such as reinforcing support and widening the width of concrete walls were taken to ensure the stability of the retained roadway.During the reuse period,measures such as adding hydraulic supports and reinforcing the roof of the roadway were taken to ensure the normal mining of the working face.The mining pressure results indicated that the increasing of support strength can effectively ensure the formation effect of the concrete wall during the retention period,and the mining pressure was not obvious.During the reuse period,the mining pressure was more severe,and the deformation of the concrete wall changed significantly compared with normal areas.The subsidence of the roof increased to 850 mm.By adopting various support forms,the normal mining of the working face was ultimately ensured.

关 键 词：沿空留巷 留巷阶段 复用阶段 矿压观测 

分 类 号：TD353[矿业工程—矿井建设]