深井条形矿柱安全系数计算公式优化研究  

Study on Optimization of Calculation Formula of Safety Factor of Strip Pillar in Deep Mine

作　　者：姚桂宏 金长宇[1] 丁成功 祝贺超 韩滔 杨智博 YAO Guihong;JIN Changyu;DING Chenggong;ZHU Hechao;HAN Tao;YANG Zhibo(Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Shenyang 110819,China;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.,Maanshan 243000,China;Ansteel Cornerstone Mining Co.,Ltd.,Anshan 114047,China)

机构地区：[1]深部金属矿山安全开采教育部重点实验室,辽宁沈阳110819 [2]中钢集团马鞍山矿山研究总院股份有限公司,安徽马鞍山243000 [3]鞍钢基石矿业有限公司,辽宁鞍山114047

出　　处：《金属矿山》2024年第10期6-12,共7页Metal Mine

基　　金：中央高校基本科研业务费专项(编号:N2101041)。

摘　　要：随着我国矿山进入大规模深部开采阶段,越来越多的矿体开采面临高应力环境,这将导致开采扰动诱发的高应力破坏现象愈发显著,因此采场稳定性成为影响矿山生产的重要安全问题。矿柱作为主要承受上覆岩体自重应力与水平构造应力的结构,是矿房回采作业过程中最有可能发生破坏的部位,因此其宽度是采场设计的主要参数。为确定深部采场矿柱的合理宽度,开展深井条形矿柱安全系数计算公式优化研究,本研究提出了一种适用于深部矿柱强度修正经验公式。该公式通过引入Hoek-Brown准则,对原有强度折减经验系数K进行了确定,建立了K值的计算方法,并采用理论分析和数值模拟提出了适用于该矿区深部矿柱荷载值计算的修正经验公式,最终基于矿柱安全系数公式确定了某超深部矿山高阶段空场嗣后充填法的矿柱宽度。As China′s mines enter the stage of large-scale deep mining,more and more orebodies are faced with highstress environment,which will lead to the phenomenon of high-stress failure induced by mining disturbance.Therefore,stope stability has become an important safety issue affecting mine production.As a structure that mainly bears the weight stress and horizontal tectonic stress of the overlying rock mass,the pillar is the most likely part to be damaged during the mining operation,so its width is the main parameter of stope design.In order to determine the reasonable width of pillar in deep stope and carry out optimization research on the calculation formula of pillar safety factor of strip pillar in deep well,an empirical formula for strength correction of deep pillar is put forward in this paper.By introducing the Hoek-Brown criterion,the original strength reduction empirical coefficient K is determined,the calculation method of K value is established,and the revised empirical formula suitable for the calculation of deep pillar load value in this mining area is proposed by theoretical analysis and numerical simulation.Finally,based on the pillar safety factor formula,the pillar width of the high stage open stope subsequent filling method in an ultra-deep mine is determined.

关 键 词：深部矿体 矿柱宽度 数值计算 HOEK-BROWN准则 

分 类 号：TD853.391[矿业工程—金属矿开采]