基于瓦斯地质图的工作面突出区域预测技术

Technology for outburst prediction at working face based on gas-geological map

为了准确预测工作面的突出危险性,在整理分析工作面瓦斯地质资料的基础上,实测了大量的瓦斯基础参数,研究了15#煤层的吸附特征,提出并确定了工作面区域预测指标及临界值,研究了工作面的瓦斯赋存规律,编制了工作面瓦斯地质图,对工作面进行了区域预测,并对预测结果进行了验证.研究结果表明:15#煤层煤的吸附能力较强,以瓦斯含量10.0 m3/t和绝对涌出量4.0 m3/min作为预测指标和临界值是可靠的,采用瓦斯地质图方法进行工作面突出区域预测和分级管理,瓦斯赋存规律一目了然,预测结果可靠,预测方法简洁有效,便于现场操作.该成果对于防治工作面的煤与瓦斯突出具有一定的参考价值和指导意义.

In order to accurately predict coal and gas outburst risk at working face,a large number of measurements on basic gas parameters were taken on the basis of analysis and compilation of gas-geological data.The prediction indexes and critical values were determined with the study of the adsorption characteristics at 15# seam.In addition,the gas-geological map at the working face was drawn based on the study of gas distribution rule.With the prediction of outburst area,the prediction results were verified.This study shows that the adsorption ability of 15# seam is strong.Therefore,using a gas content 10.0 m3/t and absolute gas emission 4.0 m3/min as the prediction indexes and critical values is sound and rational.Using gas-geology map predicting outburst area and classifying management,the gas distribution can be clearly observed and the division results are reliable.The prediction method is simple,effective and feasible for site operation.The study result has a useful reference value and is of significance for coal and gas outburst prevention.