33 / 2023-05-15 09:57:47

Study on pressure relief and permeability improvement of diamond wire saw cutting inclined coal seam

diamond wire saw,inclined coal seam,gas seepage,pressure relief and reflection improvement

Abstract: Cutting coal seam with diamond beaded rope saw can realize continuous seam cutting with large area of coal seam. In order to obtain the law of pressure relief and seepage flow in coal seam after cutting inclined coal seam with diamond beaded rope saw, a mechanical model of deformation and subsidence of overlying strata over seam seam cutting with rope saw was established by analyzing roof movement theory under uniform load. Then, through the gas seepage test of coal body, the stress-permeability fitting formula of different damaged coal samples is obtained. On this basis, the FLAC^3D numerical simulation method is used to analyze the stress and permeability distribution law of coal seam after seam cutting.