Research on Gas Prevention and Control Technology for Drilling Holes in Low Permeability Coal Seam Extraction
Advanced drilling is one of the comprehensive anti outburst measures in China,which is widely used due to its advantages of simple process,strong practicality,and good anti outburst effect.Coal is a combination of coal,fractures,and pores,and it is evident that it should possess the properties of a porous medium.And advanced drilling is to drill a certain number of holes into the protruding coal seam to be controlled,and the coal seam gas flows into the advanced drilling through infiltration and diffusion,thereby reducing the pressure of the controlled coal seam and achieving the effect of preventing outbursts.
NETL
NSTL
万方数据
