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Support Scheme Optimization of Large-section and Soft-rock Roadway in Tunlan Mine

机译：屯兰矿大段和软岩巷道的支持方案优化

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摘要

The haulage roadway of Face 12501 of Tunlan mine was a large-section and soft-rock roadway, and its deformation was very large, so the original support system could not satisfy the support demands. Three optimization schemes were proposed according to the geological conditions of the roadway, and the schemes were simulated by FLAC3D. The results showed that reducing the row & line space was not a good way to improve the supporting effect, however, it would effectively reduce the maximum stress of surrounding rocks and control the development of plastic zones by using long bolts instead of anchor cables, the maximum stress was reduced from 16.5MPatol3.9MPa, and the roof's plastic damage range was reduced from 2.8m to 1.5m. The supporting effect is significant, and it could maintain the roadway's stability effectively.
机译：突尔兰矿面部12501的运输巷道是一个大型和柔软的摇滚道路，它的变形非常大，因此原始的支持系统无法满足支持需求。根据道路的地质条件提出了三种优化方案，并通过FLAC3D模拟方案。结果表明，减少行和线条空间不是提高支持效果的好方法，然而，它将有效降低周围岩石的最大应力，并通过使用长螺栓而不是锚点控制塑料区的发展。最大应力从16.5mpAtol3.9mpa降低，屋顶的塑料损伤范围从2.8米降低到1.5米。配套效果是显着的，它可以有效地保持道路的稳定性。

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