With the rapid increase of coal demand in our country,the ratio of reserves and production of coal has decreased greatly,and the reserve of coal has shown an obvious decreasing trend.As a non-renewable resource,the sustainable exploitation of coal is seriously threatened,recovery of coal pillar is an effective way to improve recovery rate and resource utilization ratio.In this paper,the No.9717 working face of Jiaozishan Coal Mine was taken as the research object,aiming at the roof control problem of main roadway coal pillar re-covery face,using the method of combining theoretical analysis with field measurement,based on the coupling relationship between the support and the surrounding rock,combined with the coupling relationship between the support and surrounding rock of the coal pillar recovery face in the main roadway,the working resistance of the support was determined.The selection of hydraulic support for the work-ing face was reasonably carried out,and the roof control scheme for the coal pillar recovery face was designed.The support effect of the working face was analyzed to ensure the safe recovery of the coal pillar recovery working face.The research results have certain refer-ence significance for coal pillar recovery face under similar geological conditions.
关键词
煤柱回收/矿压显现规律/液压支架/破坏特征/围岩稳定性
Key words
coal pillar recovery/law of mine pressure appearance/hydraulic support/failure characteristics/stability of surrounding rock
维普
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