long hole blasting raising 深孔爆破法天井掘进
long hole blasting 深孔爆破
step long-hole blasting 台阶深孔爆破
bunch-long-hole blasting 束状深孔爆破
Moderate-long hole blasting 中深孔爆破
intermediate long hole blasting 中深孔爆破
medium to long hole blasting 中深孔爆破
The blasting boulder yield is an important quality indicators in the step long-hole blasting of surface mine.
大块率是评价露天矿台阶深孔爆破质量的重要指标之一。
A new technique of the long-hole blasting has been used in raising and prospecting of the rooms and the pillars.
一次钻孔分段爆破的新工艺已成功地应用到天井掘进和矿房、矿柱的回采方面。
The parameters and layout of linear shaped charge, and the hole-pattern parameters, charging structure and priming method for long-hole blasting were discussed.
讨论了线形聚能装药的参数、设置方法以及深孔爆破的布孔参数、装药结构、起爆方法。
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