Research On The Effect Of Driving Blasting In Coal Mine Rock Gallery By Use Of Level3Permissible Water-gel Explosives With High Strength

Main producing mine and the mine being built in Huainan and Huaibei’s coalfield in Anhui province are almost gas outburst mine or highly gassy mine. For more hardness than Medium hard rock and hard rock, existing level3permissible emulsion explosive and level3water-gel explosive’s rock blasting energy is relatively inadequate. In their blasting operation,the blast hole utilization rate is low and rock drivage efficiency is low. It can’t satisfy the needs of the efficient construction of coal mines and coal mining. The explosion of the explosive energy level is higher and the ability for crushing the rock blasting is stronger during the blasting operations. The ability of Combustible gas and the ability of combustible dust’s ignition are strong, which the safety degree of the explosive gas is low. New type high power level3water gel explosive appear on the basis of guarantee the gas safety and increase the energy level of the explosive. It coordinate the coalmine permissible explosives between the explosive energy levels and the gas safety better. It will be a technological breakthrough that is improving the mine tunneling efficiency.In the study for the purpose of water-gel explosive at high power levels in the rock drivage in coal mine blasting effect, examining the explosive detonation parameters, work capacity and the contrast of explosive rock ability as the prerequisite, for high power level3water-gel explosive in rock drivage in coal mine blasting effect is analyzed. Contrast detonation parameters of the theoretical calculation, some factors of the explosion power capability are measured by experiment, such as the explosive detonation velocity measurement and the steel casting tests of ballistic casting experiment, etc. Blasting the precast concrete cube is by different performance of explosive in study of the rock damage ability, which analyze the broken piece of debris. This paper compared with explosive performance parameters and blasting effect, security level for gas safety testing. Embodied in a couple of serious ways:Theory of explosives analysis and contrast, high power level3water gel explosive heat significantly lower than level2coal mine permissible water gel explosive, butexplosive volume is close to level2coal mine permissible water gel explosive. Detonation velocity was measured in the experiments,the high power level3 permissible water gel explosive detonation velocity as close to level2coal mine permissible water gel explosive. Gas safety degree of simple test, could be the result of gas safety degree is superior to the existing three level of coal mine permissible water gel explosive. Ballistic pendulum method by throwing the horizontal distance directly reflects the high energy levelspermissible water gel explosive high power level3coal mine.Study on the effect of external high power three level of coal mine permissible water gelexplosive on tunneling blasting effect, fragmentation analysis results show the high power three level of coal mine permissible water gel explosive rock breaking high capacity. The show on the coal rock drivage industrial test results, the same blasting material consumption in the same working condition, high power three level of coal mine permissible water gel explosive blasting efficiency in a certain extent and level two coal mine permissible water gel explosives near, more obvious than the tunneling effect of the existing three level improved significantly.Demonstrates that, at the present stage of high gas and coal mine gas outburst, highpower three level of coal mine permissible water gel explosive no matter in its safetyoperation, the superiority and other aspects of the work ability. Compared with the original water gel explosive progress and performance in the blasting effect in out, for the next step of blasting excavation in coal mine provides a better theoretical basis and field experience.