Author(s)

Qiao Wei

Corresponding Author

Qiao Wei

Abstract

The Yangquan Kaiyuan Coal Mine 3# coal seam is a typical low-permeability high-gas coal seam, which has the problem of unsatisfactory gas drainage effect. For the status quo, the current status of gas drainage in Kaiyuan Coal Mine is summarized, and the main influencing factors affecting gas drainage are analyzed. Then the gas drainage of the 3# coal seam is carried out by using the three-dimensional cross-drilling gas drainage technology. Field practice shows that after the implementation of this technology, the average 100m extraction of the 3# coal seam working face reaches 0.0212m3/min.hm, and the attenuation coefficient is 0.0707d-1, which has achieved good drainage effect.

Keywords

Gas Drainage, High Gas, Low Permeability, Three-Dimensional Cross Drilling