Bedding Hole Gas Extraction Parameters Reasonably To Determine In Hebi No.10 Mine

In this paper est abli shing the orehole down the seam drainage gas solid coupl ing model conform to the mine by using coal and rock defor mat ion the ory and gas flow theory,then did simulati on by using Coms ol Multiphysics simula tion software,after setti ng a series conditions,simulated the law of gas movement in the coal seam,comp ared and anal yzed the simulation result and masure d data,at last proved the correctness of the model.Depending on the correct mathe matic model and geome tric model,effe cts of different were simulat ed.The functiona l relationbetwe en the extra ction effective radius of every be dding hol e in the t est c oal sea m and the extraction time was obtained from the simulated result.We got extraction effecti ve r adius of He bi No.10 mine was 1.5m under the condition that negative press ur e was 20 kp,drainage t ime wa s 93 d and the aperture was 94 mm t hrough the field experimentation,which agreed with simulation result,and proved the accuracy of this formula,provided r eli abil ity for t he simula tion.And through the simulation t o determine the appropriate pore diameter is 94 mm,reasonable hole spacing of 2 m, reasonable borehole l ength of 70 m.Through SPSS software on the extraction time, pore diame ter, crustal stress of the simul ation results for Correlation analysis, conclusion the function expression about the effect ive radius of extraction.This paper provided a re asonable extraction scheme for this mine by reasonabl e extraction parameters obt ained from numeri cal simulation.