摘要
以某急倾斜矿体崩落法转充填法开采为背景,结合普氏理论法、材料力学法、荷载传递交汇线法及K.B.鲁别涅依特公式,计算了两区域合理的隔离矿柱厚度。同时,利用数值模拟技术,分析了多中段协同回采过程中隔离矿柱的稳定性。研究结果表明:基于多种理论计算方法耦合分析,确定急倾斜矿体隔离矿柱合理厚度为31m,安全系数1.5;在不同回采方案下,地压活动变化不大,先行回采一、三中段有助于减小地压活动;充填体有效转移应力,提升了回采过程的稳定性;深部回采对隔离矿柱的竖向位移影响较小,矿柱在回采过程中保持稳定;塑性破坏主要集中在充填采场边界,先行回采二、四中段可显著减少塑性破坏区,提升采场稳定性。
Based on the mining of a steeply inclined ore body by caving method to filling method,combined with the Platts theory method,material mechanics method,load transfer intersection line method and K.B.Rubeneit formula,the reasonable thickness of isolated pillars in the two areas is calculated.At the same time,the stability of isolated pillars in the process of multi-stage collaborative mining is analyzed by numerical simulation technology.The results show that based on the coupling analysis of various theoretical calculation methods,the reasonable thickness of the isolated pillar of the steeply inclined ore body is determined to be 31 m,and the safety factor is 1.5.Under different mining schemes,the ground pressure activity does not change much,and the first mining of the first and third middle sections helps to reduce the ground pressure activity.The effective transfer stress of the filling body improves the stability of the mining process.The deep mining has little effect on the vertical displacement of the isolated pillar,and the pillar remains stable during the mining process.The plastic failure is mainly concentrated on the boundary of the filling stope.The first mining of the second and fourth middle sections can significantly reduce the plastic failure zone and improve the stability of the stope.
作者
胡高峰
涂旭东
张庆嵩
王玉丁
王靖
HU Gaofeng;TU Xudong;ZHANG Qingsong;WANG Yuding;WANG Jing(Shaanxi Fengxian Sifang Gold Mine Co.,Ltd.;Changsha Institute of Mine Research Co.,Ltd.;National Engineering Research Center for Metal Mining;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.)
出处
《现代矿业》
2025年第8期101-106,共6页
Modern Mining
基金
中国五矿科技专项计划(编号:ZX24J107)。
关键词
急倾斜矿体
隔离矿柱
理论计算
数值模拟
协同回采
steeply inclined orebody
isolated pillar
theoretical calculation
numerical simulation
cooperative mining
