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煤和瓦斯突出的现象,给煤矿井下生产带来了极大的危害。因此从开始发生这一现象时起,就采取了一系列的防范措施,用来防止它的发生或消除它的危害性。在缓倾斜单一的突出危险煤层中掘进巷道时,曾采取过当大根、起前支架、小直径排瓦斯钻孔等结合手镐掘进的措施,在运用这些措施进行掘进时,辅助工时大大增加,成巷速度很低,平均日进2～3米并且不能起到预防突出的作用;以后采取了大直径(300米)排瓦斯钻孔结合放炮掘进的措施,取得了良好的预防效果,并提高了成巷的速度,平均日进6～8米。但对实现快速速进仍
The phenomenon of coal and gas outburst has brought great harm to coal mine production. Therefore, from the very beginning of this phenomenon, a series of preventive measures have been taken to prevent its occurrence or eliminate its harmfulness. When digging a roadway in a gently inclined and predominantly dangerous coal seam, measures such as excavation with a large root, a front supporter and a small diameter row of gas drilling holes combined with pick and pick have been taken and the number of auxiliary manhours increased greatly when these measures were adopted for driving a tunnel. Lane into the lane speed is very low, the average daily into the 2 to 3 meters and can not play a prominent role in prevention; later adopted a large diameter (300 meters) row of gas drilling combined with shot blasting measures, and achieved good preventive effect and improve Lane into the speed of the average daily into 6 to 8 meters. But still fast to achieve rapid