在严重突出区域的煤巷掘进中用深孔松动爆破替代超前钻孔防突的试验

针对打通二矿首采薄煤层严重突出危险区沿软分层施工超前排放钻孔突出频率高、强度大的现状，充分利用软、硬分层突出危险性差异大的特点，改为在硬分层中布置钻孔进行深孔松动爆破防治煤与瓦斯突出试验，取得了初步成效。

Experiment of Long-hole Valley Shotfiring in stead of Advanced Boreholes to Prevent Outburst in Coal Way Driving in Serious Outburst Region

In Datong No.2 Mine outburst occurred frequently with large intensity when drilling advanced boreholes to drain gas along the soft slice before the first mining of the thin seam with great danger of outburst.In order to solve the problem,boreholes were arranged in the hard slice in stead by making full use of the great difference of outburst risk between the soft and hard slices.Thus initial success was obtained in the experiment of long-hole volley shotfiring to prevent outburst of gas and coal.