preparatory workings

A Discussion on Support Classification of Preparatory Workings

采准巷道支护分级的探讨

Effect of soft rock controlled entirely on structural stability of preparatory workings ' adjoining rock

控制软岩层对采准巷道围岩结构稳定的作用

Practice of controlling deformation of preparatory workings surrounded by soft and fractured rock under high stress

高应力软破岩采准巷道变形控制技术工程实践

Smooth Blasting Used in the Infirmness Preparatory Workings

光面爆破技术对不稳固采准巷道的应用

In view of the increase of the final cross-section of preparatory workings and the decrease of the workings stability , the numerical calculation method was used to optimize the calculation of the supporting method and find out the rational supporting scheme .

针对武钢程潮铁矿采准巷道净断面尺寸增大、巷道稳定性下降的状况，采用数值计算方法对程潮铁矿巷道支护方案进行优化计算，并给出合理的支护方案。