关键词: 煤储层, 可控冲击波, 增透技术, 瓦斯抽采, 有效抽采半径

Abstract: In order to solve the problem of optimization of coal reservoir permeability enhancement technology faced by mine gas control, In this paper a controllable shock wave coal reservoir permeability enhancement technology is introduced and Taking Jining Coal Mine as the background of engineering practice The effective extraction radius, extraction volume and time to reach the standard of impact drilling are taken as the evaluation indexes of the effect of controlled shock wave, The results of engineering practice show that Controllable shock wave can promote the communication between primary fissures to form a network of permeable fissures by forcing the internal structure of coal reservoirs to be destroyed, and thus the permeability of coal seams is significantly improved. Therefore, the effective radius of impact drilling is increased to 17m. Compared with ordinary drilling, this technology increases the single-hole extraction to 8.9 times, effectively reduces the time of gas extraction reaching the standard by 64%, saves a lot of economic investment, and with the increase of single-point mode of shock wave, its effect of enhancing permeability is more remarkable.