一、前言随着采掘区域向深部发展,瓦斯突出的规模和频率均有增大的倾向。因而确立有效的预测和防止对策就成了紧迫的课题。瓦斯突出被认为是由于在煤层中蕴藏的瓦斯能、煤层及其周围岩体中的应力状态以及因采掘而造成的应力重新分布、煤层的机械的及物理化学的各种性质等综合在一起的、复杂的因素而发生的。 I. INTRODUCTION With the deepening of mining areas, the size and frequency of gas outbursts tend to increase. Therefore, establishing effective forecasting and countermeasures has become an urgent issue. Gas outburst is believed to be due to the presence of gas in the coal seam, stress conditions in and around the coal seam and stress redistribution due to excavation, mechanical and physicochemical properties of the coal seam, and the like , Complicated factors happen.