求翻译：现代煤矿都针对可能发生的灾变有一定的预防措施，但是没有具体的有关矿井火灾应急预防体系的详细研究，也没有对矿井现有的措施进行评判和优化。是什么意思？

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Modern coal mines are against the possibility of catastrophes have a certain preventive measures, but no specific information on mine fire emergency prevention system that a detailed study of the mine, and no existing measures are judged and optimization.

The modern coal mine all aims at the cataclysm which possibly occurs to have certain preventive measure, but does not have the concrete related mine fire emergency prevention system dissect, also has not carried on the judgment and the optimization to the mine pit existing measure.

Modern coal mine catastrophe that may occur for some preventive measures, but no specific details about the emergency prevention system for mine fire research, nor the mine evaluation and optimization of existing measures.

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