Multi-layer 3D gas extraction technology in goaf of fully mechanized working face
In order to solve the problem of gas in the upper corner and air return roadway of fully mechanized coal mining face,the method of"high directional long borehole+Yokokawa buried pipe in goaf+upper corner pipe insertion in goaf"is adopted to strengthen the extraction of gas in goaf,which is assisted by multi-layer 3D gas drainage technology of the medi-um borehole and through borehole in goaf.After adopting this technology,the maximum gas concentration in the upper corner of the working face is 0.65％and that in the return air flow is 0.52％,effectively solving the problem of the gas in the up-per corner of the working face and in the return air flow,and ensuring the safe and efficient production of the mine.
high gas minemulti-layerthree-dimensionalgas extractioneffect investigation
万方数据
维普
