Study on Influence of the Gas Extraction Rate in High Level Suction Roadway by Blast Weakening Hard Roof
Chen Jian
Dai Junchao
Yang Lei
Wang Dao-yang
Huang Wenyao
Abstract：As the formation of large area roof hanging for the comprehensive mechanized mining face with hard roof, pumping gas extraction concentration is low in high level suction roadway, while concentration of fully mechanized upper corner gas is high, which causes the speed of the face is heavily influenced. The roof rock of the face is weakened via the design for long-hole blasting parameters and blasting technology. The fact shows that the gas extraction rate in high level suction roadway in the upside return airway was increased by using the deep hole pre-splitting blasting on the roof. It is an efficient way for the safety and efficiency mining.
Keywords：high level suction roadwaydeep-hole blastinghard roofcomprehensive mechanized mining facegas control
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 25-28 )