某矿矿柱回采预留顶板安全厚度及进路跨度研究  

Study on the Safety Thickness and Drift Span of Reserved Roof in Pillar Mining of a Mine

作　　者：权鹏程 朱仕林 刘培正 张丹丹[4] 王靖 QUAN Pengcheng;ZHU Shilin;LIU Peizheng;ZHANG Dandan;WANG Jing(Xuzhou lron Mining Group Co.,Ltd.;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.;State Key Laboratory of Safety and Health for Metal Mines;Yunnan Design Institute Group Survey Institute Co.,Ltd.)

机构地区：[1]徐州铁矿集团有限公司,江苏省徐州市221000 [2]中钢集团马鞍山矿山研究总院股份有限公司 [3]金属矿山安全与健康国家重点实验室 [4]云南省设计院集团勘察院有限公司

出　　处：《现代矿业》2025年第2期221-223,227,共4页Modern Mining

摘　　要：以某矿为研究背景,为充分回收矿产资源,防止大规模地压活动发生,确保充填体下水平矿柱安全顺利回收,采用结构力学法、破裂拱估算法、厚跨比法分析了预留顶板的安全厚度。在预留顶板厚度2.5 m条件下,结合室内岩石力学试验参数,采用数值模拟法对回采进路跨度2.2,2.5,2.8 m的围岩位移、应力及塑性区分布情况进行分析。结果表明,在水平矿柱高6 m,进路跨度2.5 m,预留顶板安全厚度2.5 m时,位移、应力变化未发展至地表,塑性区未扩展贯通,能够保证安全回采并取得较好的经济效益。Taking a mine as the research background,in order to fully recover mineral resources,pre-vent large-scale ground pressure activities,and ensure the safe and smooth recovery of horizontal pillars un-der the filling body,the structural mechanics method,fracture arch estimation method,and thickness-span ratio method are used to analyze the safety thickness of the reserved roof.Under the condition of the reserved roof thickness of 2.5 m,combined with the indoor rock mechanics test parameters,the numerical simulation method is used to analyze the displacement,stress and plastic zone distribution of the surrounding rock with the mining drift span of 2.2,2.5 and 2.8 m.The results show that the horizontal pillar height is 6 m,the drift span is 2.5 m,the safety thickness of the reserved roof is 2.5 m,the displacement and stress changes do not develop to the surface,and the plastic zone does not expand and penetrate,which can ensure safe mining and achieve better economic benefits.

关 键 词：顶板安全厚度 进路跨度 FLAC3D 数值模拟 

分 类 号：TD327.2[矿业工程—矿井建设]