摘要
马蹄沟煤矿3506末采工作面回撤通道受邻近工作面3505回采扰动影响,陆续发生顶板下沉、帮部内鼓、底板隆起及巷道断面缩小等严重变形,严重影响3505工作面生产设备回撤工作的安全高效开展。为有效控制围岩变形,基于锚杆与围岩的相互作用力学模型,对回撤通道锚固围岩变形范围进行反演分析,在此基础上提出了具有针对性的二次锚注联合加固方案并实施,在二次加固后对围岩稳定性进行现场监测。结果表明:回撤通道经过二次锚注联合加固后,顶板下沉、两帮移近、底板隆起等变形得到了有效控制。
The retracement laneway of 3506 final working face in Matigou Coal Mine is affected by the mining disturbance of the adjacent 3505 working face,and serious deformations such as roof subsidence,inner bulge of the gang,floor uplift and tunnel section reduction have occurred successively,which seriously affect the safe and efficient retraction of production equipment in 3505 working face.In order to effectively control the deformation of the surrounding rock,based on the interaction mechanics model between the rockbolt and the surrounding rock,an inversion analysis was carried out on the deformation range of the surrounding rock anchored in the retracement laneway.On this basis,a targeted secondary anchor-injection joint reinforcement scheme was proposed,and the stability of surrounding rock after secondary reinforcement was monitored on site.The results show that the deformations such as roof subsidence,two gangs movement and floor uplift are effectively controlled after the secondary anchor-injection joint reinforcement of the retracement laneway.
作者
朱自新
赵东方
王余伟
ZHU Zixin;ZHAO Dongfang;WANG Yuwei(Matigou Coal Mine,Huating Coal Industry Group Company,Huating 744103,China)
出处
《矿业安全与环保》
CAS
北大核心
2023年第5期124-129,136,共7页
Mining Safety & Environmental Protection
关键词
围岩变形
末采阶段
回撤通道
二次加固
效果分析
deformation of surrounding rock
final mining stage
retracement laneway
secondary reinforcement
effectiveness analysis
