Dynamic and static coupling loads (DSLs) are one of the most common stress environments in underground engineering. As the depth of a roadway increases over the life of a mine, the static load of the ground stress field increase multiplies, and the cyclic operation at the working face releases a large amount of dynamic energy. Therefore, deep roadways easily induce dynamic disasters during production. In this paper, a deep roadway numerical model was built with FLAC^3D to test the deep roadway under DSLs and was simulated with 16 different support designs. The ground stability in each support condition was examined and compared in terms of the ground deformation and scope of failure. The underlying support mechanism was further analyzed with numerical modeling in view of the deformation in the surrounding rock mass induced by variations in the support parameters. The results show that shortening the bolt spacing is an effective measure to control the deformation of surrounding rock whatever DSLs or static load. Under static load, the larger the anchoring length is, the more stable the surrounding rock is. Under DSLs, end grouting length (S = 600 mm) and full grouting length (S = 1800 mm) can effectively control the deformation of surrounding rocks and enhance the stability of surrounding rocks. The results contribute to the design of supports in the field of underground coal mines and provide a basis for determining the reasonable support scheme for roadways.

中文翻译：

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动静耦合作用下锚杆参数地面控制效果的参数研究

动态和静态耦合载荷（DSL）是地下工程中最常见的应力环境之一。随着巷道深度的增加，整个矿山的使用寿命会增大地应力场的静载荷，并且工作面的循环运行会释放大量的动能。因此，深厚的巷道很容易在生产过程中诱发动态灾害。本文利用FLAC ^3D建立了深巷道数值模型测试DSL下的深层巷道，并使用16种不同的支撑设计进行了仿真。检查了每种支撑条件下的地面稳定性，并根据地面变形和破坏范围进行了比较。考虑到支撑参数变化引起的围岩变形，利用数值模型对基础支撑机理进行了进一步分析。结果表明，无论是DSLs还是静载荷，缩短锚杆间距是控制围岩变形的有效措施。在静载荷下，锚固长度越大，围岩越稳定。在DSLs下，端部灌浆长度（S  = 600 mm）和全灌浆长度（S = 1800 mm）可以有效地控制围岩的变形，增强围岩的稳定性。研究结果为煤矿井下支护设计提供了依据，为确定合理的巷道支护方案提供了依据。