山东煤炭科技2023，Vol.41Issue(12)：10-14,5.DOI:10.3969/j.issn.1005-2801.2023.12.003
大断面开切眼顶板水力压裂后稳定性判别与控制
Stability Discrimination and Control After Hydraulic Fracturing of Large Cross Section Open Cutting Hole Roof
马清水1
作者信息
- 1. 华电煤业集团有限公司,北京 100035
- 折叠
摘要
Abstract
The Longde Coal Mine usually uses single body passive reinforcement support for the open cutting holes,which is costly and labor-intensive.Using on-site measurement and theoretical analysis,the stability and feasibility of active support of the 213 open cutting hole roof after hydraulic fracturing are demonstrated.A"W-shaped steel belt+anchor cable"one belt three anchor reinforcement support scheme is proposed to replace the single body pillar passive reinforcement support.The results show that the maximum value of deep separation layer of the roof after hydraulic fracturing is 4 mm,and the maximum value of shallow separation layer is 7 mm.The self stability of the roof is still good.The maximum displacement amount of the top and floor after active support is 7.2 mm,and the maximum displacement amount of the two sides is 5.8 mm,achieving the expected effect.关键词
大断面/切眼/压裂/顶板Key words
large cross section/hole cutting/fracture/roof分类
矿业与冶金引用本文复制引用
马清水..大断面开切眼顶板水力压裂后稳定性判别与控制[J].山东煤炭科技,2023,41(12):10-14,5.
