中厚煤层复合顶板切顶自成巷切缝效应研究

Study on Slitting Effect in Self-forming Lane of Roof-cutting in Composite Roof with Medium Thick Seam

以店坪矿中厚煤层复合顶板为研究对象进行切顶卸压自动成巷研究,以矿井及工作面的地质条件为基础,进行巷道临空侧有无切缝对巷道顶板峰值应力、位移影响的研究,通过理论分析、现场实验及FLAC^(3D)软件的模拟得出当巷道顶板存在切缝时,巷道顶板峰值应力降低,位移减小,矸石垮落充满采空区,现场应用效果好。

Taking the composite roof of medium-thick coal seam in Dianping mine as the research object to carry out the research on automatic cutting of top cutting and pressure relief,and based on the geological conditions of the mine and working face,take a study of the impact on the peak stress and displacement of the roadway roof with or without kerf on the airside on the roadway,through theoretical analysis,field experiments and FLAC3D software simulation,shows that when there is a kerf in the roof of the roadway,the peak stress of the roadway roof is reduced,the displacement is reduced,the meteorites are filled with goafs,and the field application effect is good.