急倾斜特厚煤层工作面瓦斯涌出量预测及规律研究

Study on Prediction and Regularity of Gas Emission from Working Faces in Steeply Inclined and Thick Coal Seams

为了准确预测急倾斜特厚煤层分层开采工作面的瓦斯涌出量,对该条件下的瓦斯涌出影响因素进行分析,并对瓦斯涌出规律进行总结,建立了适合急倾斜煤层瓦斯涌出量预测的数学模型。对试验工作面瓦斯涌出规律分析,针对其瓦斯含量、推进速度及开采工艺等瓦斯涌出量影响因素分析,得到了不同影响因素对瓦斯涌出的影响及相关关系。根据乌东煤矿实际开采情况,运用所建立的瓦斯涌出量预测模型,得出预测结果与实际瓦斯涌出量相差仅为8.63%,为急倾斜特厚煤层工作面瓦斯涌出量预测提供了依据。

In order to accurately predict the amount of gas emission in the working face of steeply inclined and extra-thick coal seam,the influencing factors of gas emission under this condition are analyzed,and the gas emission law was summarized,and a mathematical model suitable for prediction of gas emission in steeply inclined coal seam was established.Based on the analysis of the gas emission law of the test working face and the influence factors of gas emission amount such as the gas content advance speed and mining technology,the influence of different influencing factors on gas emission and its correlation are obtained.According to the actual mining situation of Wudong coal mine,using the established gas emission prediction model,the difference between the predicted result and the actual gas emission is only 8.63%,which improves the prediction accuracy and provides a basis for the prediction of gas emission in the working face of steeply inclined and extra-thick coal seam.