排间延期时间对爆堆形成影响的数值模拟分析  

Numerical Simulation Analysis of the Influence of Inter-Row Delay Time on the Formation of Blasting Pile

作　　者：佟佳鸿 郭连军 邓丁 高久庆 赵鑫[2] 高崇 TONG Jiahong;GUO Lianjun;DENG Ding;GAO Jiuqing;ZHAO Xin;GAO Chong(School of Architecture and Civil Engineering,Shenyang University of Technology,Shenyang,Liaoning 110870,China;China Railway 19th Bureau Group Mining Investment Co.,Ltd.,Beijing 100161,China;China Railway19th Bureau Group Co.,Ltd.,Beijing 100171,China)

机构地区：[1]沈阳工业大学建筑与土木工程学院,辽宁沈阳110870 [2]中铁十九局集团矿业投资有限公司,北京100161 [3]中铁十九局集团有限公司,北京100171

出　　处：《矿业研究与开发》2024年第12期60-67,共8页Mining Research and Development

基　　金：国家自然科学基金资助项目(51974187)。

摘　　要：爆堆的形成是一个动态的过程,不同排间延期时间下的碎岩运动情况不同,爆堆形成过程及最终形态也不相同。为研究不同排间延期时间对爆堆形成的影响规律,根据辽宁某矿山的工程实际,利用PFC数值模拟软件进行0 ms、25 ms、45 ms、65 ms、85 ms排间延时爆破模拟。模拟结果表明,岩石破碎程度随着排间延期时间的增加先变强后变弱,爆堆高度随着延期时间的增加而降低,该矿山选取45 ms和65 ms的排间延期时间可取得较好的综合爆破效果。为验证模拟结果,引入Weibull模型,对现场试验获得的Weibull特征参数和模拟结果的Weibull特征参数进行比对,证明了模拟结果的有效性。The formation of blasting pile is a dynamic process. Movement of crushed rock is different under different inter-row delay time, and the formation process and final shape of blasting pile are also different. In order to study the influence of different inter-row delay time on the formation of blasting pile, according to the engineering practice of a mine in Liaoning, PFC numerical simulation software was used to simulate 0 ms, 25 ms, 45 ms, 65 ms and 85 ms inter-row delay blasting. The simulation results show that the degree of rock fragmentation increases first and then decreases with the increase of inter-row delay time, and the height of blasting pile decreases with the increase of delay time. The mine can achieve better comprehensive blasting effect by selecting 45 ms and 65 ms inter-row delay time. In order to verify the simulation results, the Weibull model is introduced, and the Weibull characteristic parameters obtained from the field test and the Weibull characteristic parameters of the simulation results are compared, which proves the effectiveness of the simulation results.

关 键 词：爆堆形态 排间延期时间 碎岩运动 数值模拟 

分 类 号：TD235[矿业工程—矿井建设]