立井井筒揭煤中的震动放炮技术

VIBRATION SHOT TECHNOLOGY USED IN THE UNCOVERING OF COAL BED OF VERTICAL SHAFT

立井掘进穿过煤层时 ,在检测和分析煤层内沼气的赋存情况后 ,先行钻孔排放以降低沼气压力和喷出速度 ,然后安设金属骨架 ,在其保护下 ,采用震动放炮的方法全端面一次揭开煤层。对震动放炮揭煤的爆破参数、起爆网络等进行了精心设计与施工 。

Holes will be drilled to reduce the methane pressure and ejection speed after detecting and analyzing the occurrence of methane in coal bed when the vertical shaft dig in and pass through the coal bed.Metallic frame will then be installed and the coal bed will be uncovered by vibration shot and under the protection of the frame. The design and construction of blasting parameters,detonation network for the coal bed uncovering by vibration shot are carefully carried out and the coal bed is uncovered safely and smoothly.