摘要
为了解决传统爆破卸压过程中造成的破碎区范围深度浅、范围广的问题,提出了聚能爆破切顶卸压的方法,利用数值模拟软件对聚能爆破的炮孔间距、炮孔直径、径向不耦合系数等参数进行了研究,最终确定最佳炮孔间距为1.2 m、炮孔直径为70 mm、径向不耦合系数为1.6。对模拟结果进行工业化试验发现,经过聚能爆破,巷道顶板下沉量及两帮移近量有了明显的降低,达到了弱化顶板的目的。
In order to solve the problem of shallow depth and wide range of fragmentation zone caused by traditional blasting pressure relief process,a method of shaped charge blasting top cutting pressure relief was proposed.Numerical simulation software was used to study the parameters of shaped charge blasting,such as hole spacing,hole diameter,and radial uncoupling coefficient.Finally,the optimal hole spacing was determined to be 1.2 m,hole diameter to be 70 mm,and radial uncoupling coefficient to be 1.6.Through industrial experiments on the simulation results,it was found that after shaped charge blasting,the subsidence of the roadway roof and the displacement of the two sides were significantly reduced,achieving the goal of weakening the roof.
作者
侯晓琛
Hou Xiaochen(Shanxi Hongdong Xishan Guangdao Coal Industry Co.,Ltd.,Linfen Shanxi 033400,China)
出处
《山西冶金》
CAS
2023年第7期71-73,共3页
Shanxi Metallurgy
关键词
数值模拟
聚能爆破
炮孔间距
围岩变形
numerical simulation
energy accumulation blasting
borehole spacing
surrounding rock deformation
