特厚煤层综放开采合理区段煤柱宽度探析

Discussion on Rational Coal Pillar Width of Fully Mechanized Sublevel Caving Mining in Extremely Thick Coal Seam

为了研究特厚煤层合理区段煤柱宽度,以不连沟煤矿F6201工作面回采巷道为研究对象,采用FLAC数值模拟软件对留设煤柱为10.0,15.0,17.5,20.0,22.5,25.0 m时的煤柱及巷道水平应力、巷道变形分布和变形量进行模拟研究,并结合现场实测侧向支承压力,提出现阶段所采用的20.0 m区段煤柱可减少到17.5 m的建议。

To study the rational width of coal pillar in extremely thick coal seam,the gateway of F6201 working face in Buliangou Coal Mine was taken as the study object.By FLAG simulation,the distribution of the horizontal stress and the roadway deformation of coal pillar and gateway were simulated under the condition of 10,15,17.5,20,22.5,25 meter coal pillar respectively.Side abutment pressure was also measured combined the site measurement,and it was proposed that the pillar width in F6201 working face can be changed to17.5 meter from 20 meter.