Parameters' Optimization Analysis In Underwater Blasting

The underwater drilling blasting engineering is a importance part of the engineering blasting. Currently, the domestic and international theories and application of the land blasting is mature and perfect. Comparing to the underwater blasting, the research and applications of the underwater blasting is lagged. This is because the underwater blasting is proceeded in the water, its technique is more complex then the land blasting in the same condition. The practice of the underwater blasting is rare in the former engineering and the blasting elements is too more such as drilling technique, water proof index, rock constitute, sea weather restrict the development of the underwater blasting. Now the technical workers often decide the blasting method and parameters by using former construction experience, comparing the similar engineering or doing a lot of experiments in the underwater blasting. It will waste the dynamite, delay the deadline, affect the results. And it is easy failing to get the expected results or result the accidents by using the fault parameters.This article is on the base of consulting a lot of books and practice about the underwater blasting. It researches about the rock rupture mechanism by using mechanics method and induces the blasting parameters.Using the numerical value soft in accompany of the engineering reality to simulate and analyze the exploding procedure, including rock inner pressure, effective pressure and so on. The TNT is adopted because it has been tested for many times. The rock entity is considered as the elastic entity. The gravity of water is simplified as pressure and loaded on the top surface of the rock. As the symmetry of the rock and other entity, the model can be simplified into 1/4 of the real model. The numerical value simulation is a complementary method, it can not utterly reflect the real exploding process so it only derives the explosive factor relationship in the same condition. According to the simulation results and the treatment of the data, it derives the relationship of the explosive factor on the land and under water as y=0.0004x~3 + 0.02x~2 +1.56x + 0.73(3