岩石の発破特性値の新計算法
1957 年 73 巻 826 号 p. 205-209
詳細
1957 年 73 巻 826 号 p. 205-209
The authors have deduced a blasting theory of rock based on fracture by principal tensile stresses produced by detonation of an explosive charge in bore hole.
According to the theory, a quantity of charge L (kg) needed to blast a rock of least resistance w (m) is expressed as follows,
L=cw3
where c is called “blasting coefficient” and it is determined by three properties (loading density, specific energy and detonation velocity) of an explosive charge used and three blasting characteristics (tensille strength, compressibility and crushability) of rock to be blasted.
