突出煤层中软煤厚度与电磁辐射规律研究

Research of regularity of soft coal thickness and electromagnetic radiation in outburst coal seam

通过试验研究了软煤厚度和煤与瓦斯突出的关系,得出软煤厚度突增(变化率≥10%)或一段时间内厚度持续在0.8m以上时突出危险性增大的结论;为了提高突出预测准确率,采用电磁辐射技术分析了软煤厚度和电磁辐射的响应规律,结果表明,软煤电磁辐射高于硬煤,软煤厚度增加或持续较大(≥0.8m)时,电磁辐射值也相应增高或持续很高,突出危险性增大;软煤厚度和电磁辐射信号呈很好的正相关性,相关系数为0.824。

The paper studied relation between soft coal thickness and outburst of coal and gas, and gota conclusion that risk of outburst of coal and gas increases when soft coal thickness increases suddenly （rate of change ≥10%） or the thickness is more than 0.8 m over a period of time. In order to improve accuracy of outburst prediction, electromagnetic radiation is employed to analyze response regularity of soft coal thickness and electromagnetic radiation. The result shows that electromagnetic radiation of soft coal is higher than hard coal, and if soft coal thickness increases or sustains higher （≥ 0. 8 m）, value of electromagnetic radiation increases or sustains high too, outburst risk increases accordingly; there is a positive correlation between soft coal thickness and electromagnetic radiation, and the correlation coefficient is 0. 824.