Research and Engineering Practice on Gob-side Entry Retaining Technology with Roof Cutting and Pressure Relief in Large-mining-height Working Face
The paper focuses on the goaf retaining roadway in the high mining face of Yitang Coal Industry.Based on numerical calculation and analysis,the influence of different top cutting heights on the movement of overlying rock and the stability of the surrounding rock of the roadway was analyzed.Furthermore,the key technical parameters of the goaf retaining roadway were selected,and the cutting depth was determined to be 20 meters and the top cutting angle was 15°.A support method using constant resistance and large deformation anchor cables to reinforce the roadway roof was designed,and a reasonable roadway surrounding rock support scheme and gangue blocking technology were also designed.On site practice has shown that the deformation control of the roadway is within the allowable range,which can fully meet the normal use of the working face.
No pillar miningGob side entry retainingRoof cutting and pressure reliefSupport scheme
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