上山石门微差控制排爆揭煤预防突出的试验研究

Experimental Study on Explosion Elimination and Outburst Prevention with Delay Control during Exposing Coal Seam in a Rise Crosscut

介绍了在海石湾深部矿井首采工作面上山石门揭穿单一近水平特厚煤层具有严重煤与瓦斯(CO2、CH4)、油气突出危险条件下,采用卧底巷道,增大爆破自由面,合理布孔和优化装药结构的微差控制排爆揭煤技术及效果。

When a flat extra-thick seam with serious outburst of coal, gas (CO2, CH4) and oil gas is exposed in the rise crosscut of the first-mining face in Haishiwan Mine, some techniques for exposing this seam were used such as driving a ripping roadway, enlarging free area of explosion, reasonable shothole arrangement and delay control blasting.This paper gives a description of these techniques and their effectiveness.