多中段连续高大间柱回采研究及工程实践  

Study on the Extraction of Multi-level Continuous Large Rib Pillar and its Engineering Practice

作　　者：杨顺 刘建 张智博 刘博 胡静云 YANG Shun;LIU Jian;ZHANG Zhibo;LIU Bo;HU Jingyun(State Key Laboratory of Safety Technology of Metal Mines,Changsha Institute of Mining Research Co.,Ltd,Changsha,Hunan 410012,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]长沙矿山研究院有限责任公司,湖南长沙410012 [2]金属矿山安全技术国家重点实验室,湖南长沙410012 [3]北京科技大学土木与资源工程学院,北京100083

出　　处：《矿业研究与开发》2021年第7期1-8,共8页Mining Research and Development

摘　　要：以万城铅锌矿3#矿体特殊的多中段连续高大间柱回采为工程背景,运用数值模拟和微震监测技术,并结合现场矿柱开裂调查,在充分评估矿体上下盘围岩强度的基础上,对一次性侧向崩矿回采19线矿柱873 m以上矿体的可行性进行分析。研究结果表明:(1)数值模拟结果与矿柱开裂现场调查结果相契合,验证了物理力学参数的有效性及数值模型的可靠性;(2)上下盘围岩成拱效应十分显著,与矿体走向近似平行的最大主应力促进了空区稳定,回收19线矿柱不会造成其他矿柱失稳,地表在一定范围内变形0-2 mm,沉降较小。在工程实践中,成功爆破矿柱矿石6.02万t,为矿山创造了一定的经济效益。Taking the recovery of the special multi-level continuous large rib pillar in Wancheng Lead-zinc Mine as engineering background, the feasibility of extracting the ore body above 873 m in the Wan-19 pillar by one-time lateral blasting was analyzed on the basis of fully evaluating the strength of the surrounding rocks by using numerical simulation technology combined with microseismic monitoring and on-site pillar cracking investigation. The research results show that numerical simulation results are in good agreement with the field investigation results of pillar cracking, verifying the effectiveness of the physical and mechanical parameters and the reliability of the numerical model. The arching effect of the surrounding rocks is very significant, and the maximum principal stress with direction approximately parallel to the ore body strike promotes the goaf stability. The extraction of the Wan-19 pillar will not cause other pillars to be failure. The deformation of the ground surface in certain range is between 0~2 mm and the subsidence degree is relatively small. In engineering practice, about 60 200 tons of ore pillar are successfully recovered by blasting, which creates remarkable economic benefits for the company.

关 键 词：矿柱回收 高大间柱 微震监测 数值模拟 工程实践 

分 类 号：TD853.391[矿业工程—金属矿开采]