一、现状 与建国初期相比,近年来我国煤与瓦斯突出的次数和强度、千吨以上的突出次数均有上升趋势,根据重庆煤研所的统计材料,上升趋势可以简略的表达如下: I. Status Quo Compared with the early days of the founding of New China, the number and intensity of coal and gas outburst in China in recent years have been on the rise. According to the statistical data of Chongqing Coal Research Institute, the upward trend can be briefly expressed as follows: