Parameters optimization and engineering application of gas drainage drilling
Lv Dongnan1, Zhang Minbo2
1. Dashucun Mine, Jizhong Energy Fengfeng Group, Handan 056300, China; 2. School of Resource and Civil Engineering, Wuhan Institute of Technology, Wuhan 430032, China
Based on blind area of traditional drilling, with danger and without meeting the needs of outburst prevention, the improvements of square and equilateral triangle drilling were analyzed, which avoid blind mining area and meet the needs of outburst prevention, the efficient area of equilateral triangle drilling is 1.3 times larger than square drilling. Combined with the 172404 working face mining of Dachucun Mine, equilateral triangle drilling enables to save 397 500 yuan in outburst prevention in the same area, with 60 000 m2 of gas drainage area in Dashucun Mine yearly, equilateral triangle drilling enables to save about 4million yuan in the mine.
