Apptication of the directional break blasting technology in smooth blasting;

Application study on directional fracture controlled blasting with shaped charge in rock;

According to explosion mechanics and fracture mechanics,the initiation mechanism of the crack and its expansion of orientation fracture blasting were studied,the mechanism of crack initiation and its expansion of orientation fracture blasting by linear cumulative cutting charge in rock were studied,then the linear cumulative cutting charge was designed and tested in laboratory and field.

Mechanics effect analysis and parameters study on borehole directional fracture blasting;

A new method of fracture controlled blasting was presented, which makes use of different coupling mediums (water and gas) to carry blasting in the hole at the same time.

With the past theories and practices of fracture controlled blasting, on the basis of the present explosive theories and technology, combination the characteristic of hydraulic pressure blasting and gas decoupling blasting, the new method of fracture blasting was analyzed and applied using different coupling medium-water and gas within the hole at the same time.

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.