Application Of Pressure Relief By Blasting On The Prevention Of Rock Burst

The dynamic disasters in coal mines have always been the main difficult problems on rock mass mechanics and rock pressure. As one of the most serious dynamic phenomenon in mines, rock burst is still not solved from the theory to the practice completely. With the increase of mining depth, rock burst has occurred more and more times in the mines, and the strength of its becomes higher than before. This problem causes enormous economic loss and personnel casualty, which greatly threaten the mine production and safety. So, it is significant to research these preventive measures of rock burst deeply.Deep hole pressure relief by blasting in coal has been used to remove the danger of rock burst impact basic measures and widely used,the method is more practical measures which was applied on all the rock burst mining area in our country This paper obtains from the pressure relief by blasting mechanism,analyzed the differences of pressure relief by blasting in coal and pressure relief in rock,studied the mechanism of pressure relief by blasting in hard roof and pressure relief by blasting in coal and the determination of reasonable blasting parameters.In the engineening example,through the numerical simulation method to predict effect and feasibility of pressure relief by blasting to verify the reliability of the selection of blasting parameters.After pressure relief by blasting in the scene,through mine drilling peep instrument,electromagnetic radiation instrument and the method of drilling bits to test effect of pressure relief by blasting and demonstrates the practicality of the scheme.Test results show that the effect of pressure relief is obvious purpose of impingement,the scheme is feasible.In practice,in view of the different types of rock burst should adopt different pressure relief measures as appropriate,pressure relief by blasting can be associated with other impingement method use and constantl improve the construction technology and parameter,achieve ideal impingement,for coal mine safety productionand create the conditions.