Analysis of blast stress field is a basic problem of blasting theory research about linear explosive charge.
爆炸应力场分析是条形药包爆破作用机理研究的一个基本问题。
But till today, researches on completion of blind shafting in deep-hold blasting theory and experiment were not many.
从目前已有的研究状况来看，对盲天井深孔爆破一次成井的理论和试验研究还不多。
The technique of deep-hole presplitting blasting in coal bed is widely used for gas predrainage recently; but its blasting theory is not clear up to now.
煤层深孔预裂爆破近年来在瓦斯抽放中运用日益增多，但目前对其爆破理论研究较少。
应用推荐