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编辑同志:我是湖北省宜昌地区香溪河矿务局郑家河煤矿技术员。我们在煤巷掘进中至今仍使用段发爆破,我想改用毫秒雷管全断面一次爆破,其它问题已解决,现有下列问题解决不了,请您帮助。我矿煤层倾角45°,高沼气矿井,煤尘具有爆炸危险性,煤层具有自然发火倾向,采用“滑坡采煤法”。1、炮泥长度问题,我们这里平时炮泥长度还不足10cm,这本是不符合《煤矿安全规
Editor’s Comrade: I am a coal mine technician at Xiangjiahe Mining Bureau in Yichang, Hubei Province. We are still using the tunnel blasting in the coal tunneling blasting, I would like to switch to a full blast millisecond detonation once the blast, the other problems have been resolved, the existing problems can not be solved, please help. I seam coal seam angle of 45 °, high methane gas mines, coal dust explosion danger, coal seam has a natural tendency to fire, the use of “landslide mining method.” 1, the length of the gun, we usually have less than 10cm in length, this is not in line with "Coal Mine Safety Regulations