露天煤矿爆破大块成因及影响研究  

Study on causes and influence of blasting bulk in Open-pit Coal Mine

作　　者：吕文伟 LYU Wenwei(Ha'erwusu Open-pit Coal Mine,China Energy Group Zhunge'er Energy Co.,Ltd.,Ordos 010300,China)

机构地区：[1]国能准能集团有限责任公司哈尔乌素露天矿,内蒙古鄂尔多斯010300

出　　处：《露天采矿技术》2023年第4期30-33,共4页Opencast Mining Technology

摘　　要：为了明确爆破工程产生大块的影响因素以及大块和台阶稳定性之间的相互关系;基于层次分析法基本原理,分析了岩石坚固性系数、炸药单耗等参数对大块产生的影响权重;构建了大块赋存于边坡坡顶、坡中、坡底的单台阶数值模型,计算了边坡稳定性系数。结果表明:炸药单耗和完整性系数是大块产生的主要控制因素;赋存于台阶顶部、坡面的大块会对稳定性造成不利影响,赋存于底部的大块有利于台阶稳定。In order to clarify the influence factors of blasting engineering bulk and the relationship between bulk and step stability,based on the basic principle of analytic hierarchy process,the article analyzes the influence weights of rock solidity coefficient,explosive unit consumption and other parameters on the bulk,constructs a single-step numerical model of large blocks in the top,middle and bottom of the slope,calculates the slope stability coefficient.The results show that explosive unit consumption and integrity coefficient are the main control factors of bulk production.The block at the top of the steps and the slope will have adverse effects on the stability,and the large block at the bottom is conducive to the stability of the steps.

关 键 词：大块 层次分析法 影响权重 数值模型 台阶稳定性 

分 类 号：TD824.2[矿业工程—煤矿开采]