三软突出煤层工作面区域预测方法研究

Research on Regional Gas Prediction Method For Working Face in Three Soft Coal Seam with Outburst Danger

准确评价回采工作面的突出危险性,并对工作面进行突出危险区域划分,是实现矿井突出分级管理的前提,是矿井突出综合防治的关键技术环节。针对三软突出煤层瓦斯含量高、构造煤普遍发育和煤层厚度变化大的特点,提出了以煤层瓦斯含量、煤层厚度变化作为区域预测指标进行工作面瓦斯预测,并确定了该预测指标的临界值,为有效制订防突措施、提高安全经济效益提供技术依据。以新安矿11221工作面为例,利用选取的预测指标,进行了工作面的瓦斯突出区域预测。

Evaluating outburst risk of mining faces accurately,and plotting danger zone of outburst for working face,is the premise of actualizing classification management of mine outburst,which is key technology link of mine outburst integrated control.Aiming at the characteristics of three soft coal seam with outburst danger,such as high gas content,general development of structural coal and enormous variation of coal seam thickness,a method of working face gas prediction that taking coal seam gas content and thick ness variation as region prediction index was predicted,critical value of predictor indexes were also ascertained,which provided technical reference to making effective measures against outburst and improve mining safety.At last,taking 11221 working face of Xin′an Mine as an example,the selected predictor indexes were used to actualize gas outburst region forecast.