Gas Control Technology for First Slice Working Face of Complicated Extra-thick Coal Seam in Baijigou Mine
WANG Hua
Abstract：To aim at the complex occurrence conditions, high gas-bearing capacity and gas emission and serious gas disasters of the coal seam of 0102102 first slice working face, gas pre-drainage methods by crossing holes and holes along the seam were adopted to reduce the coal-seam gas-bearing capacity;the gas prediction method from different source was used for predicting the absolute outflow of gas in the working face during mining, and a comprehensive control measure by gas drainage from the seam being mined, the adjacent seam and the mined-out area was proposed. The results showed that the gas-bearing capacity in the working face after pre-drainage reduced from 21. 77 m3/t to 8. 17 m3/t and the absolute outflow of gas in the working face during mining was 100. 8 m3/min, a distribution table of gas drainage volumes by each drainage method in the working face during mining was obtained, this thus ensured the safe mining of the working face.
Keywords：complicated extra-thick coal seamfirst slice working facegas controlgas drainage
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 77-79,82 )