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最近,普罗旺斯煤矿开凿了两口新竖井,其中Z竖井通过一斜坡道与采区相通,此斜坡道长1750米,位于-598～-813米水平之间,平均坡度为12.2％,设计断面为16米~2。
Recently, two new vertical shafts were drilled in the Provence Coal Mine, of which the Z-shaft was connected to the mining area by a ramp that is 1750 meters long and lies between -598 and -813 meters with an average gradient of 12.2% and a design cross-section of 16 M ~ 2.