... -effective 4,long service life Dry-Mix Gunite Machine for Coal Mine Shotcrete machine is widely used in engineering and construction, mining ... marsh coal mine tunnel shotcrete construction operations. Dry-Mix Gunite Machine for Coal Mine with features: 1,Advantages:This is a ... method with vortex flow, so the spraying flow is even, continuous and steady, to improve the shotcrete quality. ItemPZ-5BPZ- ...