河兴煤矿C_8煤层钻屑瓦斯解吸指标K_1和钻屑量S临界值研究

Study on K_1 and S critical value of drilling cuttings gas desorption index of C_8 coal seam in Hexing Coal Mine

近年来的实践表明,河兴煤矿C_8煤层局部预测突出危险性参考临界值和真实临界值不符。针对河兴煤矿采用的局部预测指标钻屑瓦斯解吸指标K_1及钻屑量S不具有针对性和有效性的问题,而是仅仅参照《防治煤与瓦斯突出规定》的推荐值,需要摸索和确定适合该矿C_8煤层回采和掘进时突出预测指标及其临界值。通过统计分析、理论计算和实验室研究,对河兴煤矿C_8煤层钻屑瓦斯解吸指标K_1和钻屑量S临界值考察研究,确定了河兴煤矿C_8煤层局部防突预测及效检指标临界值,对于河兴煤矿正常开展突出危险性预测工作具有重要意义。

In recent years,the practice shows that the local prediction of coal seam is inconsistent with the reference critical value and the true critical value of the C_8 coal seam in Hexing Coal Mine,and the local prediction index of the gas desorption index K_1 and the amount of drilling chip S is not pertinent and effective in Hexing Coal Mine,and these indexes simply refer to " coal and gas outburst prevention regulations" of the recommended values,it is necessary to highlight and determine the prediction index and critical value suitable for C_8 coal seam.Through statistical analysis,theoretical research and calculation of laboratory,the local prediction index of the gas desorption index K_1 and the amount of drilling chip S in Hexing Coal Mine were studied,the local outburst prediction and the critical value of efficiency check for C_8 coal seam in Hexing Coal Mine were determined,and has great significance for the prediction of the outburst danger in the coal mine.