Study on Filling Material Ratio and Filling Effect: Taking Coarse Fly Ash and Coal Gangue as the Main Filling Component

<div>Dynamic paste filling device. 1, base; 2, inner cylinder; 3, jack; 4, loading plate; 5, pressure gage; 6, pumping port; 7, high-pressure hose; 8, flowmeter; 9, top cover; 10, filling groove.</div>

Advances in Civil Engineering

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Figure 4

Figure 4: Study on Filling Material Ratio and Filling Effect: Taking Coarse Fly Ash and Coal Gangue as the Main Filling Component 