煤与瓦斯突出过程中温度变化的实验研究

Experimental study on temperature variation of coal and gas outburst

通过模拟实验方法测定在煤与瓦斯突出过程中的温度变化,用测定结果来证实突出强度不同,煤体温度变化也不相同,瓦斯压力越大,煤体下降的温度越大;在煤与瓦斯突出过程中,瓦斯的膨胀做功过程并非绝热过程,而是一个接近于等温的多变过程,为从热力学角度研究煤与瓦斯突出机理提供了帮助.图2,表3,参5.

A experimental method is introduced to measure the temperature variation of coal and gas outburst.Based on the results of laboratory experiments,the calculation of polytropic exponent and theoretical analysis,some conclusions are drawn.First,different pressures and different kinds of gas result in different temperature variations,higher pressure of gas causes much decrease of temperature,and temperature variation of CO2 is larger than N2 when their pressures keep almost same during coal and gas outburst.Second,process of gas expansion in the course of coal and gas outburst is not an adiabatic process but a polytropic near isotherm process.These provide the helps for the thermodynamics research of initiation of coal and gas outburst .2figs.,3tabs.,5refs.