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针对平沟煤矿020901工作面切眼顶板下沉严重、使用的支护圆钢锚杆大量破断的问题,通过FLAC3D数值模拟软件,分别对普通低预紧力圆钢和高强高预紧力螺纹钢锚杆支护条件下切眼围岩的垂直位移分布特征、塑性区的分布特征进行分析,结果表明,该支护可有效抑制切眼围岩塑性区的发展,控制顶板离层变形,增强了围岩承载能力。将该支护技术应用于020902工作面切眼支护控制效果良好。
According to the problem of serious digging of the top roof cut in the Pinggou coal mine, a lot of broken support bolts are used. By using FLAC3D numerical simulation software, the common low preload bar and high strength and high preload bar The results show that the support can effectively restrain the development of the plastic zone of the surrounding rock and control the delamination deformation of the roof and enhance the surrounding area Rock bearing capacity. The support technology applied to 020902 face cut eye support control effect is good.