利用瓦斯解吸特征指标预测煤与瓦斯突出的实验研究

摘要

The theoretical analysis indicated that the gas emission in the heading face was mainly affected by the gas content and the Physic-mechanical ProPerties of coal. In this PaPer,study was carried out on the significant differences of the same coal, different gas Pressure,different Particle size and different mechanical ProPerties of coal in the Process of gas desorPtion through the coal samPle desorPtion exPeriments in the laboratory,it Pointed out that the characteristic indicators α of gas desorPtion can better reflect the change of the gas Pressure and Physic-mechanical ProPerties of coal. The reliability of using the characteristic indicatorsα of gas desorPtion to Predict coal and gas outburst hazard was verified by the site examPles.%理论分析了掘进工作面瓦斯涌出主要受到瓦斯含量、煤体物理力学性质的影响，并通过实验室煤样解吸试验，研究了同一煤质、不同瓦斯压力、不同粒径、不同煤体力学性质的煤样在瓦斯解吸过程中存在的显著差异，指出瓦斯解吸特征指标α可以较好地反映煤体的瓦斯含量、煤体物理力学性质的变化情况。通过现场实例验证了瓦斯解吸特征指标α对于预测预报煤与瓦斯突出危险的可靠性。