瓦斯含量法预测煤与瓦斯突出的研究与应用

Study and Application of Gas Content to Prediction of Coal and Gas Outburst

针对目前我国煤与瓦斯突出预测方法存在的预测深度浅、效率低等局限性,结合我国突出煤层特定的赋存条件及其物理力学性质,研发了基于瓦斯含量预测煤与瓦斯突出的一整套新技术与装备,主要包括煤层瓦斯含量直接快速测定技术、装备及工艺;煤与瓦斯突出三维数值模拟软件程序;适用于中软突出煤层的深部随钻定点取样技术和装备;瓦斯含量指标临界值的确定方法等。通过该研究,工作面突出预测的深度从目前的小于10 m提高到65 m,且预测时间缩短为原来的1/2。以淮南顾桥矿13号煤层为例说明了瓦斯含量指标临界值的确定程序与方法,初步确定顾桥矿13号煤层的瓦斯含量指标临界值为8.00 m3/t。

According to the limitation of the shallow predicted depth,low efficiency and others existed in the present coal and gas outburst prediction method in China,in combination of the special deposit conditions and the physical mechanics properties of the outburst seam in China,a completed set of the new technology and equipment was researched and developed based on the gas content to predict the coal and gas outburst.The new technology and equipment would be mainly including the technology,equipment and technique to directly and rapidly measure the seam gas content,the software program for the 3D numerical simulation of coal and gas outburst,the deep borehole drilling and scheduled sampling technology and equipment suitable for medium soft outburst seam,critical vale determined method of the gas content index and others.With the researches,the depth of the outburst prediction for the coal mining face would be increased from the present less than 10 m to 65 m and the prediction time could be reduced by 50%.The No.13 seam in Guqiao Mine of Huainan Coal Mining Group as a case could show the critical vale determined procedure and method of the gas content index.The critical vale of the gas content index for No.13 seam in Guqiao Mine preliminarily was determined as 8.00 m3/t.