【摘要】 大孔距小抵抗线爆破技术使爆破漏斗角增大,产生有利于反射拉应力增加及速度场分布的弧形自由面,爆破能量利用率高,爆破效果好。鸡西露天石灰石矿爆破以8 m×2.3 m大孔距小抵抗线的孔网取代了原来的4.5 m×4 m的孔网参数,进行了多排孔微差爆破,取得了明显的经济效益。更多还原

【Abstract】 Large holespacing and small burden blast can enlarge the angle of crater, produce an arc free face beneficial to the intensification of reflecting tensile stress and the distribution of velocity field, and enhance the utilization of blasting energy and improve blast efficiency. The hole pattern of 8 m×2.3 m were used to perform the multiple-row holes millisecond blasting. The remarkable economic benefit is achieved.更多还原