1 Draw horizontal deep holes in the rock drilling patio or in the rock drilling chamber. For horizontal mining, it is to break the ore in two stages, and the falling ore falls directly on the bottom structure of the stage. In this way, the workers do not enter the goaf, and the safety is good. The workers drill the rock in the small broken stone patio or the chamber. 2 In this method, the top column is exposed after the mining room is finished, so the exposure time of the top column is relatively short, and a larger mine room size can be used. China Paper Straw Packing Machine,Disposable Straw Packaging Forming Machines supplier & manufacturer, offer low price, high quality Automatic Single Straw Packaging Machines,Plastic Straw Packaging Wrapping Machines, etc.Paper Straw Packing Machine,Disposable Straw Packaging Forming Machines,Automatic Single Straw Packaging Machines,Plastic Straw Packaging Wrapping Machines Paper Straw Packing Machine,Disposable Straw Packaging Forming Machines,Automatic Single Straw Packaging Machines,Plastic Straw Packaging Wrapping Machines Wenzhou Xinlei Machinery Co. Ltd , https://www.xinleimachinery.com
The method is that it no longer divides the whole stage of the nugget into mined parts, but instead:
This scheme is also a kind of empty field method, and it is also a two-step mining, (first room, rear column, reprocessing empty area).