Influence of Cutting Height of Mining RoadwayRoof on Lateral Abutment Pressure Distribution Characteristics of Working Face
The technology of coal pillar roof cutting and pressure relief in mining roadway can effectively reduce the lateral stress disturbance caused by mining and reduce its influence on adjacent mining roadway.In this paper,the effects of different cutting height on the stress distribution around 28214 face are analyzed by theoretical analysis and numerical simulation.The results show that the range and degree of severe influence of lateral abutment pressure caused by mining can be effectively reduced by cutting the roof of mining roadway.After the top cutting and pressure relief,the severe influence zone of lateral abutment pressure from the original leading working face 110 m to the lagging working face 110 m is controlled within the leading working face 30 m to the lagging working face 50 m.The peak lateral abutment pressure caused by mining at 28214 face can be reduced by 57.6％with the cutting height of 23.5 m.Roof cutting and pressure relief of mining roadway is an effective method to improve the stress environment and the stability of surrounding rock of adjacent mining roadway.
adjacent miningtop cutting pressure reliefabutment pressurezone of intense influence
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