Abstract In order to explore the effective support method for deep broken roadway, based on the in situ stress test results, the analytical and numerical solutions of the stress and the range of plastic failure zone (PFZ) in a circular roadway subjected to non-uniform loads were obtained using analytical and finite difference numerical methods based on the elastoplastic theory, respectively. Their comparison results show that the analytical and numerical methods are correct and reasonable. Furthermore, the high geostress causes the stress and range of PFZ in roadway roof and floor to increase sharply while those in roadway ribs decrease. Moreover, the greater the difference of horizontal geostress in different horizontal directions is, the larger the range of PFZ in roadway roof and floor is. The shape of PFZ in roadway varies with the ratio of horizontal lateral pressure coefficient in x-direction and y-direction. Finally, according to the distribution characteristics of PFZ and range of PFZ under the non-uniformly high geostress, this paper has proposed a combined support scheme, and refined and optimized supporting parameters. The field monitoring results prove that the roadway deformation and fracture have been effectively controlled. The research results of this paper can provide theoretical foundation as well as technical reference for the stability control of deep broken roadway under non-uniformly high geostress.

中文翻译：

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非均匀高地应力下断层区巷道塑性破坏带特征及稳定控制技术——以皖北元店煤矿为例

摘要 为探索深部破碎巷道的有效支护方法，基于原位应力试验结果，对受非均匀作用的圆形巷道的应力和塑性破坏区（PFZ）范围进行解析和数值解。分别使用基于弹塑性理论的解析和有限差分数值方法获得载荷。他们的比较结果表明解析和数值方法是正确和合理的。此外，高地应力导致巷道顶板和底板PFZ的应力和范围急剧增加，而巷道肋处的PFZ应力和范围减小。而且，不同水平方向的水平地应力差异越大，巷道顶底板PFZ的范围越大。巷道中PFZ的形状随x方向和y方向水平侧压力系数的比值而变化。最后，根据非均匀高地应力下PFZ的分布特点和PFZ的范围，提出了组合支护方案，并细化优化了支护参数。现场监测结果证明，巷道变形和断裂得到有效控制。本文的研究成果可为非均匀高地应力下深部破碎巷道的稳定性控制提供理论依据和技术参考。提出了组合支护方案，并细化优化了支护参数。现场监测结果证明，巷道变形和断裂得到有效控制。本文的研究成果可为非均匀高地应力下深部破碎巷道的稳定性控制提供理论依据和技术参考。提出了组合支护方案，并细化优化了支护参数。现场监测结果证明，巷道变形和断裂得到有效控制。本文的研究成果可为非均匀高地应力下深部破碎巷道的稳定性控制提供理论依据和技术参考。