大断面立体斜交岔点支护与施工技术研究

Study on Support and Construction Technology of Three-dimensional Oblique Intersection with Large Section

为了解决立体斜交叉巷道交岔点因交叉断面大、开挖扰动大、施工难度大而造成的支护效果差的难题,提出对交岔点采用主动和被动相结合的刚柔联合支护方式,先对上部运料巷进行锚网索预加固,而后在巷道交叉段应用型钢支护,并采用盖挖法进行交叉段的施工。实践证明:这种支护方式和施工技术支护效果较好,起到了保证安全、降低施工难度、缩短运料巷运输中断时间的作用。

In order to solve the problem of poor supporting effect of the three-dimensional Oblique intersection, which was caused by large cross section, big excavation disturbance and construction difficulty, an active and passive combined rigid-flexible combination support was proposed. Pre-reinforcement to above haul lane was adopted with boh-mesh-anchor support system firstly, then the Steel support was applied for the cross-section of the two roadways. Finally, the cover-excavation method is used to the construction of intersection roadway. The practice results show that the application of this support and construction technology achieved a better effect of supporting. It plays the role in ensuring the security, lowering the construction difficulty, minimizing the transport time hindered.