装药直径对煤矿岩巷掘进爆破效果的影响  

Influence of charge diameter on blasting effect in coalmine rock roadway excavation

作　　者：谢平 王梦想[2] 武建 汪海波[2] 宗琦[2] 徐颖[2] XIE Ping;WANG Mengxiang;WU Jian;WANG Haibo;ZONG Qi;XU Ying(Gubei Mine of Huainan Mining(Group)Co.,Ltd.,Huainan 232001,China;School of Civil Engineering and Architecture of Anhui University of Science&Technology,Huainan 232001,China)

机构地区：[1]淮南矿业(集团)有限责任公司顾北煤矿,安徽淮南232001 [2]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《煤矿爆破》2020年第5期9-12,34,共5页Coal Mine Blasting

摘　　要：炮孔孔壁压力是研究钻孔爆破炸药对周围介质产生破坏作用不可缺少的初始参量,径向不耦合连续装药炮孔孔壁压力的主要影响因素为炸药密度、爆速和不耦合系数等。在炸药密度和不耦合系数一定的情况下,爆速与装药直径相关,为了研究装药直径对爆破效果的影响,采用理论分析与现场试验的方法,开展不同装药直径孔壁压力和爆破效果分析,探讨炮孔孔壁压力与装药直径的关系。结果表明:在装药结构和不耦合系数一定时,炮孔孔壁压力随着装药直径的增加而升高,巷道掘进掏槽爆破掏槽眼采用大直径装药能够取得较好的爆破效果,对类似工程有一定的借鉴意义。The borehole wall pressure is an indispensable initial parameter to study the explosive destructive action on surrounding medium in borehole blasting.The main influencing factors of borehole wall pressure of radial-uncoupled continuous charge are explosive density,detonation velocity,uncoupling coefficient,and so on.When the density and uncoupling coefficient of the explosive is constant,detonation velocity is related to charge diameter.In order to study the influence of charge diameter on detonation velocity,the theoretical analysis and field test are both carried out.The borehole wall pressure and blasting effect under different charge diameters are analyzed to research the relationship between borehole wall pressure and charge diameter.The results show that when the charge structure and decoupling coefficient are constant,the borehole wall pressure increases with the increase of charge diameter.Good blasting effect can be obtained by using large diameter charge structure in cutting hole of roadway excavation.

关 键 词：不耦合作用 装药直径 孔壁压力 爆破效果 

分 类 号：TD235[矿业工程—矿井建设]