摘要
受不良工程地质条件、降雨、历史上无序排土等客观因素影响,广东省大宝山矿李屋排土场高陡边坡极易产生滑坡、泥石流等安全事故。为充分保障矿山安全生产,采用多种数值分析方法相结合的手段对李屋排土场边坡稳定性进行了综合分析。通过现场实地调研与试验研究确定了排土场边坡岩体力学参数,利用Slide软件对排土场二维模型进行数值模拟,对失稳边坡进行堆置参数优化,采用Geostudio以及FLAC3D软件进行了进一步计算校核,多角度定量分析了排土场稳定性状态并最终提出了相应的稳坡措施。结果表明,3-3剖面安全系数不满足规范要求,边坡产生滑坡的风险较大;FLAC3D、Geostudio与Slide的模拟结果较一致,多种模拟手段相结合的分析方法准确且合理。最终根据模拟结果提出了“分台阶排土+堆置反压平台”的治理措施,为矿山开采提供了安全保障,同时也为露天矿排土场稳定性分析提供了技术指导。
Influenced by objective factors such as adverse engineering geological conditions, rainfall and disorderly soil discharge, the high and steep slopes of Liwu dump of Dabaoshan Mine in Guangdong Province are highly susceptible to safety hazards such as landslides and debris flows. In order to fully guarantee the safe production of the mine, a comprehensive analysis on the slope stability of Liwu dump was carried out by means of a combination of various numerical analysis methods. The mechanical parameters of the slope were determined through field researches and experimental studies, a two-dimensional dump model was numerically simulated by Slide software, the stacking parameters of the unstable slope were optimized, and further calculation and verification were carried out by Geostudio and FLAC3D software. Then, the stability state of the dump was quantitatively analyzed from multiple angles and the corresponding slope stabilization measures were finally proposed. The results show that the safety coefficient of 3-3 profile does not meet the specification requirements, and the risk of landslide on the slope is high. The simulation results of FLAC3D, Geostudio and Slide are consistent, and the analysis method combining multiple simulation means is accurate and reasonable. Finally, according to the simulation results, the management measure of discharging soil step by step and stacking back-pressure platform was proposed, which can guarantee the safety of mining and also provides a technical guidance for stability analysis of open-pit dump.
作者
蓝宇
LAN Yu(Guangdong Dabaoshan Mining Co.,Ltd.,Shaoguan,Guangdong 512127,China)
出处
《矿业研究与开发》
CAS
北大核心
2023年第3期77-82,共6页
Mining Research and Development
关键词
露天矿排土场
数值模拟
分台阶排土
边坡稳定性
反压平台
Open-pit dump
Numerical simulation
Discharging soil step by step
Slope stability
Back-pressure platform
