低温对不同水分条件下煤的坚固性系数影响研究

煤体力学性质是煤与瓦斯突出的一个必要条件，提高煤体的力学性质对抑制煤与瓦斯突出的发生具有重要的意义。为探析低温环境及水分对煤体坚固性系数的影响，通过煤样加湿处理装置及低温环境坚固性系数测试装置，对不同温度及不同水分条件下煤体的坚固性系数进行测试。研究结果表明:随着温度的升高以及煤样水分的降低，煤的坚固性系数呈减小趋势；随着温度的降低以及煤样水分的升高，煤的坚固性系数呈增大趋势。研究为通过煤层注水加冷冻的措施治理煤与瓦斯突出奠定了理论基础。

Research on influence of low temperature on coal firmness coefficient under different moisture conditions

The mechanical properties of coal are a necessary condition for coal and gas outbursts.Improving the mechanical properties of coal is of great significance to restrain the occurrence of coal and gas outbursts.In order to analyze the influence of low temperature environment and moisture on the coal solidity coefficient，the coal sample humidification treatment device and the low temperature environment solidity coefficient test device were used to test the coal solidity coefficient under different temperatures and different moisture conditions.The research results showed that with the increase of temperature and the decrease of coal sample moisture，the coal firmness coefficient showed a decreasing trend；with the decrease of temperature and the increase of coal sample moisture，the coal firmness coefficient showed an increasing trend.The above conclusions lay a theoretical foundation for the treatment of coal and gas outbursts by means of coal seam water injection and freezing.