我国是世界上煤与瓦斯突出危险严重的国家之一.据不完全统计,截至1981年末,全国已发生突出9845次,最大突出强度达12780吨.自六十年代以来,开采解放层的防突措施已广泛应用,并获得了显著效果.开采解放层作为区域性防突措施,已得到普遍的承认.但开采解放层在单一煤层或远距离煤层时难以使用;随着开采深度的增加,许多原来作为解放层的煤层成了突出危险煤层或突出危险程度增大,进一步限制了开采解放层的应用范围. According to incomplete statistics, as of the end of 1981, 9845 times have been highlighted in our country and the maximum outstanding intensity has reached 12780 tons. Since the 1960s, the prevention and control of mining the liberated layer Measures have been widely used and have achieved remarkable results. As a regional outburst prevention measure, the liberated strata have been universally acknowledged, but it is difficult to exploit the liberated strata in single coal seam or long distance coal seam. With the increase of mining depth, many The coal seam that was originally used as a liberating layer has become an extremely prominent coal seam or has become more prominent, which further limits the scope of application of the mining liberation layer.