大埋深工作面煤与瓦斯突出区域精细划分技术

Fine Dividing Technology of Coal and Gas Outburst Area in Coal Mining Face with Great Overburden

以平煤一矿丁6煤层32030工作面为例,研究了其瓦斯赋存规律,确定该面煤与瓦斯突出的构造煤厚度条件为1.2 m,并通过瓦斯吸附-解吸实验确定瓦斯含量临界值为5 m3/t,划分出该工作面突出危险区。掘进期间的效检指标数据和钻孔施工时瓦斯动力现象记录很好地验证了预测结果的准确性,该法可用于大埋深工作面的突出危险区的精细划分。

Takes 32030 working face in D6 coal seam of Pingdingshan No.1 coal mine as an example,determines the critical thickness of deformed coal as 1.2 m through researching its gas occurrence,obtains the critical value of gas content as 5 m3/t by gas adsorption and desorption experiment, and then divides coal and gas outburst area in this working face. The predicted results are proved well by detection indexes measurements during the excavation and coal-gas dynamic phenomenon records during drilling construction, so that this method can be used in fine division of coal and gas outburst area in coal mining face with great overburden.