Initiation method of deep hole blasting for dismounting building

• Main Authors: WANG ZHIZHONG, MU WENFEI, XU LIANSHENG, ZHANG BAOCAI
• Format: Patent
• Language: Chinese; English
• Published: 19.05.2010
• Subjects: AMMUNITION; BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

The invention relates to the technical field of blasting, in particular to an initiation method of deep hole blasting for dismounting a building, which is characterized by carrying out a deep holes arrangement design and a perforation construction, carrying out a time delay design of blasting detonators blasted in the deep holes and a construction of filling explosives in the deep holes, designing a time delay blasting of ground network detonators, and connecting detonators in blast holes with ground network detonators, wherein adjacent blast holes at detonation points are asymmetrically blasted. The pitch between arranged deep holes is 2.5-6.5m, the row spacing is 2.5-6.5m, and the depth deltah of the deep hole is 0-3.5m. Every two adjacent deep holes of the detonators among mainly control rows of deep holes are taken as one group, the delayed time of the first group of deep holes is 9-25ms, the delayed time of the second group of deep holes is 17-42ms, circulation is sequentially carried out; and the delaye