保安煤矿15108工作面沿空留巷技术研究及应用  

Research and Application of Retaining Roadway Along Goaf Technology for the 15108 Working Face in Bao'an Coal Mine

作　　者：任侣苏 Ren Lüsu(Shanxi Coal Transportation and Sales Group Bao'an Coal Industry Co.,Ltd.,Shanxi Yangquan 045000)

机构地区：[1]山西煤炭运销集团保安煤业有限公司,山西阳泉045000

出　　处：《山东煤炭科技》2024年第9期27-32,共6页Shandong Coal Science and Technology

摘　　要：针对保安煤矿15#煤层厚度大,留设大尺寸区段保护煤柱浪费大量煤炭资源的问题,提出了采用沿空留巷技术提高煤炭资源回收率,采用理论分析及工程类比的方法,提出了非对称的补强支护方案,在距离回采帮侧700 mm和1700 mm位置布置两列Φ21.8 mm×8300 mm的锚索,在距离非回采帮800 mm位置布置一列Φ21.8 mm×8300 mm的锚索,排距均为800 mm;采用理论计算及数值模拟的方法,确定了合理的巷旁充填体宽度为1.6 m。通过在15108回风巷进行现场试验监测数据显示,在补强支护方案条件下,当巷旁充填体宽度为1.6 m时,巷道围岩变形量不大,沿空巷道断面收敛率仅为13.7%,可以满足下一工作面的使用要求。In view of the problem of the large thickness of the 15th coal seam in Bao'an Coal Mine and the waste of a large amount of coal resources by reserving and setting up large-sized section protective coal pillars,this paper proposes the use of retaining roadway along goaf technology to improve the recovery rate of coal resources.Using methods of theoretical analysis and engineering analogy,an asymmetric reinforcement support scheme is proposed.Two rows of anchor cables with a diameter ofΦ21.8 mm×8300 mm are arranged at positions 700 mm and 1700 mm from the stoping side,and one row of anchor cables with a diameter ofΦ21.8 mm×8300 mm is arranged at a distance of 800 mm from the non stoping side,with all row spacings of 800 mm;By using methods of theoretical calculation and numerical simulation,a reasonable width of 1.6 m for the roadway side filling body is determined.Through on�site testing and monitoring data in the 15108 return air roadway,it shows that under the condition of reinforced support scheme,when the width of the roadway side filling body is 1.6 m,the deformation amount of the surrounding rock of the roadway is not significant,and the cross section convergence rate of the roadway along goaf is only 13.7%,which can meet the usage requirements of the next working face.

关 键 词：厚煤层 沿空留巷 巷道变形 充填体宽度 

分 类 号：TD353[矿业工程—矿井建设]