Study on thermal safety design index in high temperature coal mine

摘要

With the extension of mine exploitation,thermal disaster becomes more and more serious,which is the sixth nature disaster succeeding by water,fire ,gas,coal dust and roof.So,measures must be taken to improve the conditions of working environment.Non-mechanism cooling and mechanism cooling have been adopted in coal mine,especially to the mechanism cooling,the reasonable quantity of cooling need to be defined,which rely on the thermal safety index.The design of cooling in coal mine in China adopts dry-bulb temperature 26 ℃ as the single index at all times,but the index can't reflect the degree of heat disaster in detail.So,the new index needs to be defined to satisfy the requirement of thermal safety and saving energy.This paper adopts heat balance equation to study the thermal safety in coal mine,with the experiment,the heat safety model suitable to miners in China has been established,according to the model,new heat safety index has been defined.Under the new index,the miners'physiological status has been tested,the result shows that the miner's physiological status is better after one shift,so,it is a reasonable index that suitable to coal mine in China.