摘要
深部矿岩支护参数选择的科学性、合理性是保障其长期稳定的关键。以山东黄金某金矿为研究背景,采用三维数字摄影测量系统对矿区深部-620 m中段17线穿脉岩体进行结构面测量,获取岩体结构面产状、节理间距、密度等参数,运用Q系统和RMR对岩体质量进行分级,得出-620 m中段17线穿脉岩体为Ⅳ级,岩体质量较差。在此基础上,采用理论分析方法提出采场围岩支护方案,并运用FLAC3D软件对支护方案进行模拟,分析支护前后采场围岩位移、应力的变化和塑性区分布情况。结果表明:对于稳定性为Ⅳ级的围岩,采用“锚索+锚杆联合混凝土喷浆”的支护方式,可有效控制顶板和两帮的变形,并降低应力集中,保障采场围岩的稳定性。本研究确定了合理的支护方案,为矿山安全生产和支护设计提供了科学依据。
The scientific and reasonable selection of support parameters for deep mining is the key to ensuring its longterm stability.Taking a gold mine in Shandong Gold Group as the research background,a three-dimensional digital photogrammetry system was used to measure the structural planes of the 17 line vein crossing rock mass in the middle section of the mining area at-620 m.Parameters such as the occurrence of the structural plane,joint spacing and density of the rock mass are obtained.Two methods of Q and RMR are used to grade the rock mass quality.It is concluded that the 17-line through-vein rock mass in the middle of-620 m is a classⅣinferior rock mass.On this basis,the support scheme of surrounding rock in stope is proposed by theoretical analysis method,and FLAC3D software is used to simulate the support scheme,and the distribution of displacement,stress and plastic zone of surrounding rock stope before and after the support.The results show that for the surrounding rock with stability levelⅣ,the support method of anchor cable+bolt combined with concrete shotcrete can effectively control the deformation of the roof and two sides,reduce the stress concentration degree,and ensure the stability of the surrounding rock in the mining area.This study has determined a reasonable support scheme,and provided a scientific basis for mine safety production and support design.
作者
王玺
刘兴全
李正灿
梁伟章
刘震
武志明
WANG Xi;LIU Xingquan;LI Zhengcan;LIANG Weizhang;LIU Zhen;WU Zhiming(School of Civil and Resource Engineering,University of Science&Technology Beijing,Beijing 100083,China;Deep Mining Laboratory of Shandong Gold Group Co.,Ltd.,Yantai 261400,China;Shandong Gold Mining(Xinhui)Co.,Ltd.,Qingdao 266700,China;School of Resources and Safety Engineering,Central South University,Changsha 410083,China)
出处
《金属矿山》
CAS
北大核心
2024年第9期19-25,共7页
Metal Mine
基金
山东省重大科技创新工程项目(编号:2019SDZY05)
国家自然科学基金重点项目(编号:52130403)。
关键词
三维数字测量
岩体分级
深部支护
数值模拟
3D digital measurement
rock mass classification
deep support
numerical simulation
