摘要
以金鑫铜钼矿为工程背景,利用SURPAC和FLAC3D软件建立矿山实体计算模型,同时获得矿山剥采比和采出矿石量等经济数据。在不降低边坡安全系数的前提下,通过适当提高单台阶角度、高度和减小清扫平台宽度3种途径来增加露天矿最终边坡角度,使得最终边坡角提高2°,剥采比从3.66降低到3.52,减少岩石剥离量约1350万t,有效增加矿山企业经济效益。并在此基础上,通过FLAC3D对加陡后的露天矿山边坡进行稳定性分析,分析加陡之后的各边坡水平位移、塑性区破坏分布情况,并对加陡后较为危险的北边帮进行跟踪点监测。分析结果表明,各边坡除小范围局部不稳定外,整体处于稳定状态,可以通过局部加固来达到矿山安全开采的要求。
With Jinxin copper molybdenum mine as engineering background,SURPAC and FLAC3D are adopted to build the real calculation model of the mine,and the economic data such as the stripping ratio and the quantity of extracted ore are obtained simultaneously.On the premise of keeping safety,three ways of properly increasing the angle and height of single bench,and decreasing the width of cleaning bench can increase the final slope angle of open pit by 2°,drop the stripping ratio from 3.66 to 3.52 and lessen the amount of stripped rocks by 13.5 Mt.All these can efficiently improve the economic benefit of the mine enterprise.Based on this,the stability of the open pit slope after increasing the overall slope angle is analyzed,and its horizontal displacements and failures of the plastic zones are demonstrated.Real-time monitoring on the northern sidewall that is in a high risk is made.The analysis indicated that each new slope is basically in the stable condition and only small part of slope requires local ground support to guarantee the safety in mining.
出处
《金属矿山》
CAS
北大核心
2014年第10期166-170,共5页
Metal Mine
