NUMERICAL SIMULATION AND ENGINEERING APPLICATION OF NEW TYPE OF UNDERWATER BLASTING CUTTER

Based on experiment and numerical simulation, the feasibility of the blasting cutter applied in drill jam problems is explored. To deal with the drill jamming accident in the Anqing copper mine, with consideration of the geological characteristics under the well and the drill-jamming conditions, a new type of underwater blasting cutter is invented. The linear shaped charge is introduced into the new type of underwater blasting cutter by adding 12 copper pipes into it, and then the drill pipe would be penetrated by the charge jet. The blasting cutting experiment and the engineering practice show that the new type of underwater blasting cutter is effective in dealing with the drill jamming accident, and can also be used for the similar blasting engineering.