新型水下爆破切割弹的工程应用及数值模拟研究

通过钢管爆破切割实验和LS-DYNA 数值模拟软件分析研究了爆破切割弹解决卡钻问题的可行性, 然后针对安庆铜矿某一矿井的卡钻事故, 并结合井下地质情况, 在分析卡钻原因的基础上, 设计一种新型水下爆破切割弹. 通过加入12 根铜管将线性聚能引入到新型水下爆破切割弹中, 从而在爆破过程中形成了环形切割器, 利用聚能射流侵彻钻杆以达到破坏钻杆的目的. 通过爆破切割实验和工程实践可知, 新型水下爆破切割弹能够有效解决卡钻事故, 可为类似工程提供参考.

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.