The effects of roof cutting techniques on the movement law of the overlying strata and deformation features of the surrounding rock in gob-side entry retaining mines were studied using 200 working faces of the Dianping coal mine in Shanxi Province. Using a mechanical analysis, a cantilever beam model formed by roof cutting was used to derive a deformation equation. The physical model test based on the field prototype revealed an asymmetrically distributed displacement curve and reduced collapse displacement when the rock stratum was far from the cutting seam. Outside of the roof cutting height, the collapse of the overlying strata gradually reached a symmetric distribution with increasing height. The deformation of the retained roadway was mainly concentrated on the roof, and the maximum deformation was 14 mm near the roof cutting side. A numerical simulation of the original size of the model test proved that the laws of strata movement and surrounding rock deformation were consistent with the physical test results. Finally, field measurements were performed, which verified the rationality of this study.

中文翻译：

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采空区沿空留巷围岩变形与覆岩移动规律的模型试验与数值研究。

利用山西滇平煤矿的200个工作面，研究了顶板切割技术对采空区出入口护矿上覆岩运动规律和围岩变形特征的影响。通过机械分析，通过屋顶切割形成的悬臂梁模型被用于导出变形方程。基于现场原型的物理模型测试显示，当岩层远离切割层时，位移曲线不对称分布，塌陷位移减小。在顶板切割高度之外，上覆地层的塌陷随着高度的增加逐渐达到对称分布。保留巷道的变形主要集中在顶板上，在顶切面附近最大变形为14 mm。模型试验原始尺寸的数值模拟证明，地层运动和围岩变形规律与物理试验结果一致。最后，进行了实地测量，验证了这项研究的合理性。