DOI: 10.11799/ce201611019
Optimal arrangement of gas drainage drilling based on mining fractured field in fully mechanized top coal caving face
YIN Bin
Abstract：Based on the engineering background of 3215 fully mechanized top coal caving face in Wangpo high gas coal mine, through UDEC simulation and theoretical calculation, the gas drainage mechanism of mining crack field was introduced, the width of working face plastic zone, the distribution range of overlying strata cracks, and the spatial position of gob area “O” rings were studied. The layout parameters of gas drainage drilling in the working face was optimized. Field practice shows that the gas pumping rate after optimization rose from 45% to 52%, and the gas concentration at upper corner and return airway maintained at 0?8% or less, which eliminated the phenomenon of gas overrun and realized the safe and efficient production working face.
Keywords：high gasmining crack fieldgas drainagedrilling layoutnumerical simulation
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 65-68 )