Shooting breakdown method for blast mining face in coal mine

Application Number: 00112369
Application Date: 2000.06.28
Publication Number: 1331378
Publication Date: 2002.01.16
Priority Information:
International: E21C37/14
Applicant(s) Name: Zhang Hua
Inventor(s) Name: Zhang Hua;Sui Jinfeng
Patent Agency Code: 32200
Patent Agent: zhang lianqun
Abstract A shooting breakdown method for the blast mining face in coal mine features that the holes are drilled at intervals on different gravitalionally vertical lines segment by segment, the explosive charge, the number of holes and the interval can be regulated according to the actual condition, and at least two segments are detonated. Its advantages are high coal block percentage (50% or more), and high safety.