在深坑道爆破作业中,由于通风不良,有毒气体积留洞内,不易排出,易引起人员中毒。据测定,爆破后10分钟内,离作业面5-10公尺处有毒气体浓度甚高,一氧化碳少则0.18(单位是毫克/升,下同),多则0.72,比规定长期作业的容许标准(0.02)大9-36倍;氮氧化合物浓度约0.3-0.35,亦比0.005的容许标准大60-72倍。我们在1961年由化学、卫生部门共同组织一试验小组,对如何减少炸药爆炸中有毒气体产生方面作了一些试验,现分述如下,供同志们参考。(一)试验条件:坑道长600-700公尺,拐弯两个,幅圆1.8公尺×3.3公尺,机械作业打眼,炮眼 Blasting operations in the deep tunnel, due to poor ventilation, poisonous gas to stay in the hole, not easy to discharge, easy to cause poisoning. It is determined that within 10 minutes after blasting, there is a very high concentration of toxic gas at a distance of 5-10 meters from the working surface, with a minimum of 0.18 for carbon monoxide (in milligrams per liter, the same applies to the same below), 0.72 for the maximum, compared with the allowable standard for long- (0.02) 9-36 times larger; nitrogen oxide concentration of about 0.3-0.35, also larger than the allowable standard of 0.005 60-72 times. We organized a test group jointly by the chemical and health departments in 1961 and conducted some experiments on how to reduce the generation of toxic gases in the explosions of explosives. These are as follows for your reference. (A) test conditions: tunnel length 600-700 meters, turning two, 1.8 meters wide x 3.3 meters, mechanical operations drilling, blasthole