D0L:10.13374h.issn1001-053x.2012.07.005 第34卷第7期 北京科技大学学报 Vol.34 No.7 2012年7月 Journal of University of Science and Technology Beijing Jul.2012 挂帮矿充填法开采对高陡边坡及采场围岩稳定性的 影响 谭玉叶2》杜建华，2)区 宋卫东12》杨陆海》梅林芳》 1)北京科技大学金属矿山高效开采与安全教有部重点实验室，北京1000832)北京科技大学土木与环境工程学院，北京100083 3)武汉钢铁集团矿业有限责任公司，武汉430080 ☒通信作者，E-mail:du_jianhua(@hotmail.com 摘要以大治铁矿高陡边坡下2挂帮矿回采为工程背景，首先采用GEO-SLOPE软件对挂帮矿开采中边坡稳定性进行了分 析：然后通过现场监测及模型相似实验相结合的手段，研究矿柱及围岩的应力及位移变化规律，探讨了挂帮矿充填法开采对 采场围岩稳定性的影响.研究表明挂帮矿所在露天初始边坡经过扩帮及内部开采后，安全系数平均值由1.274下降至1.005， 边坡稳定性较差：目前空区采场矿柱及围岩稳定性较好，但必须对现有采空区进行充填，改变空区及矿柱应力集中状态，才能 进行矿柱及顶底板矿石回采 关键词露天开采：挂帮矿：充填：边坡稳定性：监测 分类号TD325 Effect of a filling method for mining the hanging wall ore on high-steep slope and surrounding rock stability TAN Yu-ye2),DU Jian-hua),SONG Wei-dong )YANG Lu-hai,MEI Lin-fang) 1)Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education of China),University of Science and Technology Beijing Beijing 100083,China 2)School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China 3)Wuhan Iron Steel Group Mining Co.Ltd.Wuhan 430080,China Corresponding author,E-mail:du_jianhua@hotmail.com ABSTRACT Taking the mining of the 2*hanging wall ore in Daye Iron Mine by a filling method as an engineering background,the change of high-steep slope stability in the mining process was analyzed first in this paper.Then through using on-site monitoring together with similar material simulate experiments,the stress and displacement changing rules of rock pillars and surrounding rock were studied to discuss the effect of mining the hanging wall ore using the filling method on the surrounding rock stability.The results show that the average value of slope safety coefficient decreases from 1.274 to 1.005 after slope expansion and mining.This indicates that the slope stability is poor.Although the rock pillars and surrounding rock are stable currently,the existing mined-out areas must be filled to change the stress concentration state before the mining of pillar ore and the roof floor ore. KEY WORDS open pit mining:hanging wall ore:filling:slope stability:monitoring 露天开采结束后，残留在露天境界周围的剩余 露天开采后，己形成的高陡边坡处于极限平衡状态， 矿量即为挂帮矿.据统计，挂帮矿占开采总储量的 开采挂帮矿势必影响到边坡的安全及稳定. 5%~16%1-习.最大限度地回收挂帮矿，可延长矿 武钢大治铁矿2"挂帮矿体位于东露天采场北 山服务年限，缓解矿山短时间内转产及安排大量闲 帮，为尖山主矿体的残留矿，赋存标高-144~ 置职工的压力.然而，一般情况下，矿山经过多年的 -168m.挂帮矿所在边坡垂直高度达300m以上， 收稿日期：201105-22 基金项目：“十一五”国家科技支撑重大计划资助项目(2006BABO2A02)第 34 卷 第 7 期 2012 年 7 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 34 No． 7 Jul． 2012 挂帮矿充填法开采对高陡边坡及采场围岩稳定性的 影响 谭玉叶1，2) 杜建华1，2) 宋卫东1，2) 杨陆海2) 梅林芳3) 1) 北京科技大学金属矿山高效开采与安全教育部重点实验室，北京 100083 2) 北京科技大学土木与环境工程学院，北京 100083 3) 武汉钢铁集团矿业有限责任公司，武汉 430080 通信作者，E-mail: du_jianhua@ hotmail． com 摘 要 以大冶铁矿高陡边坡下 2# 挂帮矿回采为工程背景，首先采用 GEO--SLOPE 软件对挂帮矿开采中边坡稳定性进行了分 析; 然后通过现场监测及模型相似实验相结合的手段，研究矿柱及围岩的应力及位移变化规律，探讨了挂帮矿充填法开采对 采场围岩稳定性的影响． 研究表明挂帮矿所在露天初始边坡经过扩帮及内部开采后，安全系数平均值由 1. 274 下降至 1. 005， 边坡稳定性较差; 目前空区采场矿柱及围岩稳定性较好，但必须对现有采空区进行充填，改变空区及矿柱应力集中状态，才能 进行矿柱及顶底板矿石回采． 关键词 露天开采; 挂帮矿; 充填; 边坡稳定性; 监测 分类号 TD325 Effect of a filling method for mining the hanging wall ore on high-steep slope and surrounding rock stability TAN Yu-ye 1，2) ，DU Jian-hua1，2) ，SONG Wei-dong 1，2) ，YANG Lu-hai 2) ，MEI Lin-fang3) 1) Key Laboratory of High-Efficient Mining and Safety of Metal Mines ( Ministry of Education of China) ，University of Science and Technology Beijing， Beijing 100083，China 2) School of Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China 3) Wuhan Iron ＆ Steel Group Mining Co． Ltd． ，Wuhan 430080，China Corresponding author，E-mail: du_jianhua@ hotmail． com ABSTRACT Taking the mining of the 2# hanging wall ore in Daye Iron Mine by a filling method as an engineering background，the change of high-steep slope stability in the mining process was analyzed first in this paper． Then through using on-site monitoring together with similar material simulate experiments，the stress and displacement changing rules of rock pillars and surrounding rock were studied to discuss the effect of mining the hanging wall ore using the filling method on the surrounding rock stability． The results show that the average value of slope safety coefficient decreases from 1. 274 to 1. 005 after slope expansion and mining． This indicates that the slope stability is poor． Although the rock pillars and surrounding rock are stable currently，the existing mined-out areas must be filled to change the stress concentration state before the mining of pillar ore and the roof ＆ floor ore． KEY WORDS open pit mining; hanging wall ore; filling; slope stability; monitoring 收稿日期: 2011--05--22 基金项目: “十一五”国家科技支撑重大计划资助项目( 2006BAB02A02) 露天开采结束后，残留在露天境界周围的剩余 矿量即为挂帮矿． 据统计，挂帮矿占开采总储量的 5% ～ 16%［1--2］． 最大限度地回收挂帮矿，可延长矿 山服务年限，缓解矿山短时间内转产及安排大量闲 置职工的压力． 然而，一般情况下，矿山经过多年的 露天开采后，已形成的高陡边坡处于极限平衡状态， 开采挂帮矿势必影响到边坡的安全及稳定． 武钢大冶铁矿 2# 挂帮矿体位于东露天采场北 帮，为尖山主矿体的残留矿，赋 存 标 高 － 144 ～ － 168 m． 挂帮矿所在边坡垂直高度达 300 m 以上， DOI:10.13374/j.issn1001-053x.2012.07.005