Research on Effect Test Method for Regional Gas Pre-drainage Measure against Outburst by Directional Long Boreholes along Coal Seam
ZHOU Jinlong
DONG Hongkai
LI Guoqiang
Abstract：With successful application of the directional drilling machine in Jincheng Anthracite Mining Group, the gas drainage by directional boreholes has become a routine measure for regional outburst prevention. In order to verify the effect of this measure, pre-evaluation was first made with the residual gas amount which was indirectly calculated by the gas content before pre-drainage and the drained gas amount, then the gas pre-drainage control region by directional boreholes was divided into several small areas of 60m~80m, and finally, the effect test of the measure in the small area was made by directly measuring the residual gas content of coal seams. Through the site test in Sihe Mine, the arrangement of W1302 face was safely finished.
Keywords：directional boreholegas pre-drainage from coal seamregional outburst prevention measureeffect testcoal and gas outburst
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 69-72 )