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随着煤层巷道宽度、高度的增大,顶板及两帮的拉应力及拉应力区增大、两肩角处易受剪切破坏、巷道顶板易离层,因此大断面煤巷维护更加困难。针对某矿生产地质条件和大断面巷道的维护特征,应用理论分析、数值计算和工程实践的方法,提出了大断面煤巷稳定机理与控制技术。
With the increase of the width and height of coal seam roadway, the tensile stress and tensile stress of the roof and the two gangues increase. Shear at two shoulders is easily damaged by shearing. The roof of the roadway is easily separated from the floor. Therefore, it is more difficult to maintain the large section coal roadway. According to the geological conditions of production and the maintenance characteristics of large section roadways, the stability mechanism and control technology of large section coal roadway are put forward by means of theoretical analysis, numerical calculation and engineering practice.