Study On Integrated Control Technology Of Gas Of Fully Mechanized Caving Face In Three Soft And Lower Permeabilit Coal

The transport that gas into fracture network system from coal gas surface and primary pores t is diffusion process. when mining coal seam that containing gas,In conditions of coal seam discharging pressure,Existing the phenomenon that local gas produced gas gathered up float. surrounding rock is a dynamic process in worked-out conditions. This article analysis the mechanism of formation of the circle through the "law" that the coal bed mining abscission laye fracture and break the formation of crack and close. Think of overlying strata fracture zones is the gas reservoir space. According to the different migration rule that the gas in the pore and fracture,established the flow spread equation and flow transport equations in fracture network of flow gas in the pores. For the extraction status of jiaojia village#5fully mechanized working face of coal seam.Put forward management technical measures of gas comprehensive drainage integration based on the "kilometers high fracture to roof drainage borehole"and"Return air lane high oblique borehole"and " the upper corner buried tube drainage" of the "three stereo" Achieved relief gas drainage "comprehensive"of the coal goaf that spontaneous combustion effectively and prevention and control fire effectively.