随着科学技术的发展，人类社会的进步，在煤炭生产活动中人们对安全的要求越来越高，与安全有关的费用越来越大。据对部分国有重点煤矿的初步调研分析，与安全有关的费用已占煤炭成本的２０％以上，并且还在不断增高。而从目前情况来看，无论在理论上，还是在实践中，都没... With the development of science and technology and the progress of human society, people are increasingly demanding safety in coal production activities, and the costs associated with safety are increasing. According to the preliminary investigation and analysis of some state-owned key coal mines, safety-related expenses have accounted for more than 20% of the cost of coal, and are still increasing. From the current situation, no matter in theory or in practice, no...