煤炭与化工2024，Vol.47Issue(2)：33-38,6.DOI:10.19286/j.cnki.cci.2024.02.008
巷道掘进横穿小断层构造带顶板支护优化研究
Optimization study on roof support of roadway excavation crossing small fault structural belt
摘要
Abstract
The excavation process of No.20322 Face in Caojiatan Mine was taken as the engineering research background.Through on-site research and monitoring,the deformation and failure laws of the roof before and after the roof collapse and pressure accident occurred when the roadway crosses the small fault geological structure zone were monitored.Based on this,the influence characteristics of the roof strength and stiffness values on the roof collapse were studied through numerical simulation.Subsequently,the roof was controlled by adopting a support system consisting of three anchor cables and a steel bar composite ring beam,and the angles of the anchor cables on both sides of the roof were adjusted.The anchor cable truss system was formed through truss connectors to enhance the strength and stiffness values of the coal and rock masses inside the roof.Based on the actual geological conditions on site and theoretical calculations,the optimized support plan for the roof was determined.After on-site application,the overall integrity of the roof was good and the subsidence deformation control effect was significant during the roadway excavation through small fault structural zones.This laid the foundation for the safe and efficient mining of subsequent working faces.关键词
厚煤层/顶板破碎/冒顶来压/数值模拟/矿压观测Key words
thick coal seam/broken roof/roof fall to pressure/numerical simulation/mine pressure observation分类
矿业与冶金引用本文复制引用
张虎..巷道掘进横穿小断层构造带顶板支护优化研究[J].煤炭与化工,2024,47(2):33-38,6.基金项目
国家自然科学基金项目(52104091) （52104091）
国家重点研发计划项目(2020YFB1314002) （2020YFB1314002）
