采准巷道支护分级的探讨

在矿岩工程质量分级的基础上，综合考虑采准巷道使用的时间，巷道暴露面积以及巷道影响程度来对巷道进行支护分级，并提出了巷道支护分级的方法，通过对不同支护级别的巷道因地制宜地采用不同的支护方式。可降低支护成本，该方法在程潮铁矿采准巷道支护中得到了应用，结果表明，采用支护分级方法来保证支护质量，降低支护成本是有意义的。

A Discussion on Support Classification of Preparatory Workings

Based on engineering quality classification of rock mass, support classification is carried out and a classification method is put forward for underground workings, taken into comprehensive account the service time, exposure area and influence extent of the workings. It is concluded that support cost could be reduced when varied support means are used to justify workings of different support grades. This approach has been adopted in Chengchao Iron Mine for support of preparatory workings. Application results indicate that it is significant to guarantee the support quality and cut down support cost through support classification.