DOI: 10.11799/ce201802015
Experimental study on acceleration of working face roadway driving using controlled deep hole pre-splitting with carbon dioxide
LI Yan-kui
WU Shi-yue
NIU Yu
LI Chuan-tian
Abstract：To relief the link of mining and roadway excavating and face the strict claim about safety distance of the new Coal Mine Safety Regulations, we analyzed the principle of controlled deep hole pre-splitting with carbon dioxide to promote the roadway excavating speed, tested the change law of coal mass parameters at the static state and under the roadway excavating state in N1101 working face of Yuwu Mine, and counted the daily amount of tunneling and gas density of return airway about pre-splitting and after splitting time. Field test data showed that, after splitting, the values of K1 and S had big changes, the daily amount of tunneling increased more than 30%~100%, the gas density of return airway was reduced about 16.7%. It is proved that this technique can reduce the risk of coal and gas outburst in tunneling faces, speed up the methane desorption speed, improve the roadway excavating speed, ease the problems of mining-excavating relay.
Keywords：controlled deep hole pre-splitting with carbon dioxideroadway drivingmining-driving relaygas outburst
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 55-58 )