Study on Mining Technology of Protective Layer Under Long Distance in Pingdingshan Mining Area

According to mine gas control status of deep mining in Pingdingshan Mining Area,numerical simulation and site measured means were applied to analyze the stress distribution and the swelling deformation law of the above strata and seam during the seam mining process after the remote protective layer mined.The results showed that the seam group deposit condition in Pingdingshan Mining Area could provide the excellent natural conditions for the application of the mining technology to the remote protective layer.Though a big clearance was between the seam groups,but the pressure releasing and penetration effect was obvious.With the rational pressure releasing and gas forced drainage measures,the outburst danger of the remote protective layer could be eliminated with the existing mining layout changed,the mining technology for the remote protective layer would be suitable to the safety mining of the deep coal resources.