穿层钻孔消除突出危险技术研究

摘要

In the process of regional outburst control with bedding boreholes, regional pre-draining with the bedding boreholes could reduce the gas content in the roadways to be drilled and in coal bodies surrounding the roadways, but could not eliminate the outburst hazard. Hole spraying, stuck drill, and other dynamic phenomena would occur in the construction of the bedding boreholes. Therefore, boreholes across seams were placed near rock tunnels. To control the outburst in front of faces, the pressure was relieved in the outburst hazard zones on the covering of the rock roadways. Some relief areas were formed. In the safe areas, the basic conditions of coal and gas outburst were destroyed which played an effective role in the outburst control.%采用顺层钻孔进行区域消突中，顺层钻孔区域预抽可以降低瓦斯含量，预抽准备掘进的煤巷和煤巷周围煤体的瓦斯，但其不能消除周围煤体的突出危险性，施工顺层钻孔时仍会出现喷孔、顶钻等动力现象。所以通过临近岩巷布置穿层钻孔，要对前方煤体进行消突工作，依靠岩巷掩护，对突出危险区域进行卸压，在煤体中形成一定范围的卸压区域；在这安全区域内，破坏了煤与瓦斯突出的基础条件，起到了有效防治突出的作用。