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

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.