Through reaction dynamics theory analysis and measurmentof indicators gas of the three coal samples,the activation energy values that coal samplesneed to generate indicator gases CO,CO2,and CH4 is calculated;the relation between the activation energy values and coal rank,volatile matter,spontaneous combustion tendency is analysed.The research indicates the activation energy that coal need to generate CO increases with the increase of coal rank and decreased with increasing of volatile,which is consistent with the spontaneous combustion tendency.Activation energy that coal need to generate CO can be used to judge the spontaneous combustion tendency more accurately.The research resultshas important application value and significance for getting gas to determine the state of coal in coal mine and the prevention and control of the mine fire.

中煤平朔集团有限公司所属各矿井的煤层多为易燃煤炭,本文着重对易燃特厚煤层巷道松动圈的防火技术做了介绍,有很强的实用性和操作性。

With the underground coal fire detection instance in Anjialing coal mine,China Coal Pingshuo Coal Co.,Ltd.,describes a radon detection technique to determine underground coal fire location,detection methods and data processing and so on.The technology for the development of underground coal fire control programs and initiatives provided important technical support to mine fire control,with a wide range of applications,and an important promotional value.

An analytical solution of one-and three-dimensional diffusion models in an unbounded space about a time-continuous point source and the method of image interference were used to study three-dimensional diffusion in roadway air with a fully reflecting boundary wall.The shortest fully-mixed distance and its stabilizing time were determined for dispersion of the tracing gas in the roadway air.If the hydraulic radius and friction coefficient are kept constant,the shortest fully-mixed distance increases linearly,and the time to reach equilibrium decreases by a negative power,with an increase in airflow velocity.The shortest fully-mixed distance decreases by a negative power,and the time to reach equilibrium follows a power law function,with an increase in the friction factor when the hydraulic radius and airflow velocity are constant.