摘要
由于露天矿山开采中频繁受到爆破振动作用,边坡破坏机制及稳定性分析极为复杂,对安全生产造成严重威胁。文章以矿山开挖边坡为背景,基于工程地质状况及现场试验测试,采用理论分析与数学计算相结合的方法量化爆破荷载,建立边坡爆破损伤计算模型,确定边坡破坏时间及最危险区域,并通过数值模拟方法验证计算结果准确性。计算结果表明:边坡经7次爆破后上部台阶发生破坏,最危险区域位于爆破初始位置120~160m处。同时,数值模拟结果与该计算结果具有高度的一致性,充分验证了该方法计算结果的准确性。
Due to the frequent blasting vibration in open-pit mining,the slope failure mechanism and stability analysis are extremely complicated,which is a serious threat to safety production.In this paper,the mine excavation slope is taken as the background,based on engineering geological conditions and field test,the theoretical analysis and mathematical calculation are applied to quantify the blasting load,then a slope blasting damage calculation model is established and the slope failure time and the most dangerous area are determined.At the same time,the accuracy of the calculation results is verified by numerical simulation.The results show that the upper step of the slope destroys after 7 times blasting,and the most dangerous area is located at the initial position of the blasting of 120~160 m.The numerical simulation results are consistent with the calculation results,which fully verify the accuracy of the method.
作者
陈涛
黄浩轩
王珍
CHEN Tao;HUANG Hao-xuan;WANG Zhen(School of Architectural Engineering,Huanghe Science and Technology University,Zhengzhou 450000,China;Shenyang Coal Design Institute,China Coal Technology and Engineer Group,Shenyang 110000,China))
出处
《煤炭工程》
北大核心
2019年第11期116-119,共4页
Coal Engineering
基金
国家自然科学基金资助项目(51104084,51474119)
河南省高等学校重点科研项目(20B560009)
河南省民办高校品牌专业建设点资助(ZLG201702).
关键词
爆破振动
损伤规律
稳定性分析
最危险区域
数值模拟
blast vibration
damage regularity
stability analysis
most dangerous area
numerical simulation
