Analysis of Gas Control Technology for Coal Seams in High Gas Mines
In response to the problem of large gas emission in the 7105 working face,combined with the on-site situation and coal seam occurrence,a combination of high-level gas extraction drilling,roof directional long drilling,and ground gas extraction is proposed for treatment.High level gas extraction drilling can be divided into high level fissure gas drilling and high level interception drilling,which can achieve gas extraction from the roof fissure of the goaf and intercept the pressure relief drilling of the overlying No.3 coal seam.Utilizing the advantages of long directional drilling distance and controllable drilling trajectory on the roof,achieving long-distance gas extraction from the roof.By utilizing the advantages of convenient,efficient,and large extraction volume of ground drilling,gas extraction can be achieved in the 7105 goaf and the 3rd coal seam for pressure relief.After adopting the above gas control measures layout plan,the gas concentration in the return air corner and return air roadway of the 7105 working face is within the safe range with small fluctuations,and the gas emission from the mining face is relatively small,which can create good conditions for safe and efficient production of the mining face.
high gas minegas outburstpressure relief gasdirectional long drillinggas control
NETL
NSTL
万方数据
