特厚煤层六分层开采回采面瓦斯涌出量预测研究

Study on Prediction of Gas Emission from Six-slicing Mining Face in Extra Thick Coal Seam

针对现行特厚煤层分层开采的工作面瓦斯涌出量预测方法最多只考虑到4个分层开采的情况,为了准确预测白芨沟煤矿二3特厚煤层分6个分层开采期间回采面瓦斯涌出量,在原有特厚煤层多分层开采瓦斯涌出量预测方法的基础上,结合白芨沟煤矿开采瓦斯涌出实际情况,研究提出了1种适用于白芨沟煤矿特厚煤层六分层开采的回采工作面瓦斯涌出量的预测方法。现场试验结果表明与实测统计基本一致,最大预测误差为11.87%,平均预测误差为7.61%,预测准确率达到88%以上。

In order to accurately predict the second and the third thick coal seam in Baijigou Coal Mine,and the gas emission is divided into six layers.The prediction of gas emission is the basis of the gas control scheme of the working face.The current method of forecasting the gas emission in the thick coal seam of our country takes into account the four stratified mining conditions,and the stratification of the existing extra-thick coal seam based on the prediction method of gas emission,the method of forecasting the gas emission in the mining face of the double-layer mining in the thick coal seam of Baijigou Coal Mine is proposed based on the actual situation of gas emission from Baijigou Coal Mine.The results show that the prediction error is11.87%,the average prediction error is 7.61%,and the prediction accuracy is over 88%.