Side slope pressure coal recovery technology in Antaibao Open-pit Mine
The article selects EML side slope mining machine,takes the east slope of Antaibao Open-pit Coal Mine as the research object,and demonstrates the feasibility of the side slope coal recovery process by analyzing the stability of the slope under the change of the coal pillar group and the disturbance under the side slope coal recovery process.The article clarifies the technical scheme and mining parameters of side slope coal recovery:there are three main recoverable coal seams within the recoverable range of side slope coal,the first recovered 4-1 coal and then recovered 9 coal,and the 11 coal seam is not recovered for the time being.The height of coal pillar of No.4-1,No.9 and No.11 seams are 5.5 m,5.5 m and 4.0 m respectively,the width of supporting coal pillar is 3.2 m,3.5 m and 3.8 m respectively,and the width of isolating coal pillar is 5.0 m,5.5 m and 5.5 m respectively;one isolating pillar is set up for every 10 mining towers;the minimum width of flat plate of the side slope mining operation is 80 m.Side slope pressure coal recovery technology ensures that the resources of the side slope overburden in Antaibao Open-pit Mine are efficiently recovered,and forms a coordinated mining plan between the side slope coal and the stripping project.
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