近距离采空区下回采巷道锚网索支护技术  

Bolt-net-cable supporting technology for coal winning roadway in short-distance goaf

作　　者：熊祥林[1] 陈朋磊 Xiong Xianglin;Chen Penglei(No.4 Mine of Pingdingshan Coal Industry Co.,Ltd.,Pingdingshan 467000,China;Henan Coal Research Institute Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]平煤股份四矿,河南平顶山467000 [2]河南省煤炭科学研究院有限公司,河南郑州450001

出　　处：《能源与环保》2022年第7期278-283,290,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

摘　　要：针对大埋深近距离下位煤层回采巷道小平距内错布置方式下高应力带来的大变形问题,以己16-17-31020工作面运输巷为例,分析了巷道控制原则与技术,采用数值模拟,分析了不同支护方式下巷道围岩应力及变形分布特征。研究得出,支护方案采用顶板间排距为1200 mm×1600 mm的22 mm×6500 mm预应力锚索、顶板间排距为700 mm×800 mm的22 mm×2600 mm高强预应力锚杆、两帮间排距为750 mm×800 mm的20 mm×2400 mm高强预应力锚杆时,巷道围岩的变形程度最小。研究可有效解决大埋深近距离煤层的大变形问题,可为条件相似的矿井提供借鉴。Aiming at the large deformation caused by high stress in the way of small horizontal distance and internal staggered arrangement of mining roadways with large burial depth and close distance,this paper took the transportation roadway ofⅥ16,17-31020 working face as an example,analyzed the roadway control principles and technologies,and adapt the following methods:Numerical simulation was used to analyze the stress and deformation distribution characteristics of the surrounding rock of the roadway under different support methods.The research showed that the support scheme was adapte:22 mm×6500 mm prestressed anchor cables with a row spacing of 1200 mm×1600 mm between the roofs and22 mm×2600 mm high-strength prestressed anchors with a row spacing of 700 mm×800 mm between the roofs and between the two gangs.When the row spacing was 750 mm×800 mm with20 mm×2400 mm high-strength prestressed bolts,the deformation degree of the surrounding rock of the roadway was the smallest.It could effectively solve the large deformation problem of large buried depth and short distance coal seam,and could provide reference for mines with similar conditions.

关 键 词：近距离 采空区 回采巷道 锚网索支护 数值模拟 强预应力锚杆 

分 类 号：TD323[矿业工程—矿井建设]