在苏联沃尔库塔煤炭工业生产联合公司《尤尔—绍尔》煤矿井下,对有冲击地压和煤与瓦斯突出危险的厚煤层采用局部措施进行开采。现已查明,对134—3回采工作面煤体进行水力松动能够使煤层的冲击危险性降到Ⅲ～Ⅳ级。但是,这样的水力松动需要的时间太长,因此,在准备231—3回采工作面采区时,在回采开始之前,对煤层进行了深 Under the coal mine “Yule-Sauer” in the joint venture company Vorkuta Coal Industry Production Plant in the Soviet Union, local measures were adopted for the mining of thick coal seam subjected to rock burst and coal and gas outburst. It has been ascertained that the hydraulic loosening of coal at 134-3 working face can reduce the impact risk of coal seam to Ⅲ ~ Ⅳ. However, such hydraulic loosening takes a long time, so when preparing the 231-3 mining face, the coal seam is deep before the start of the mining