Construction method for mine shaft through multilayer goaf
A construction method, goaf technology, applied in ground mining, mining equipment, earth square drilling and mining, etc.
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[0018] The construction method of the coal mine shaft passing through the multi-layer goaf adopts the following steps: 1) detection of the goaf ground and underground; 2) mechanical analysis of the goaf rock formation; 3) goaf filling range and Determination of the mechanical properties of the filling; 4), bedrock excavation; 5), construction of related chambers that are completely connected to the shaft; 6), filling and reinforcement of the goaf;
[0019] The bedrock excavation adopts the following steps: 1) Umbrella drills, drill rods and cross-shaped drill bits are used to drill holes, and the straight holes are segmented and squeezed; 2) The working face is drilled and cleaned, and then the charging line is fired ; 3), grabbing rocks and discharging gangue; 4), reinforcing steel bars; 5), building walls;
[0020] To fill and reinforce the goaf, the following steps are adopted: 1) Set up wooden point columns for temporary support, and then use the shaft of the return air sh...
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