江西皇化二井井田B4煤层突出危险性评价

Evaluation on the Outburst Danger of B 4 Coal Seam in Huanghua Coal Mine 2 of Jiangxi Province

根据皇化二井建井期间石门揭煤、采掘工作面瓦斯涌出情况，通过实测煤层瓦斯参数，重新评价了ＣＢ４煤层的突出危险性，认为ＣＢ４煤层为非突出煤层，皇化二井为非突出矿井。并用瓦斯地质单元法分析了评价结果的代表性。

CAccording to the conditions of tunnelling coal in cross drifts, the gas emission at tunnelling working face during its building time in Huanghua coal Mine 2 and the gas parameter of the coal seam from the field survey, the outburst danger has been evaluated again. It is considered that the B 4 coal seam is of non-outburst coal seam and the Huanghua coal Mine 2 is of the non-outburst coal mine. Some of the evaluated results analysed by the gas-geologic element method have been presented.