Numerical Simulation And Theory Study Of Blasthole Fracture Controllde Blasting With Two Decoupling Interaction Charge

With the past theories and practices of fracture controlled blasting, on the basis of the in being explosive theories and technology, a new method of fracture blasting-use different coupling medium-water and gas within the hole at the same time is put forward in this paper, mostly making use of the different physics and transmitted energy characteristic of water and gas. We concretely study blasting technique of two different coupling interaction charge by theory , experiment project and numerical simulation, and the three parts affirms each other, supplying and developing together.We can know more deeply about the blasting theory of explosive in the diameter no coupling from the three parts.Charging construction of different coupling interaction charge blasting technique destroyed rock causation of explosive in the diameter no coupling . Air media and water media was separated by special pipe .Water media face the side of the blasting rock and air media face the side of the obligate wall rock. The theory of the blasting method is that water medium can transfer the energy of blasting fully while air medium pass energy of blasting in low efficiency. The charging construction can change the symmetrical state of blasting energy to control energy releasing and direction effectively, more control rupture direction, which makes it possible to destroy one side of the wall rock and at the same time protect the other side. At the same time ,the energy which lay the water medium is centralized in the blasthole, the blasthole which stress along water medium is big and easily pull breakage, produced transfixion crack .In the theorty, the thesis first analyses the cracking mechanism of directional broken control blasting by fracture mechanism. Using the broken damage theory, the thesis also...