An energy-absorbing and impact-resistant roadway support method
A roadway support and anti-shock technology, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., to achieve or weaken the impact disaster degree, save production costs, and prevent impact mine pressure
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Embodiment 1
[0025] An energy-absorbing and impact-resistant roadway support method, comprising the following steps:
[0026] Step 1: First excavate the roadway, combined with the designed roadway section size: width × height = 5m × 3m, determine the dimension of the roadway excavation section: width × height = 6m×4.3m; Two gangs are used for support, the length of anchor 1 is 1.8m, the distance between anchor 1 is 1200mm, and the row spacing is 1200mm;
[0027] Step 2: Lay the metal formwork 4 on the 50m of the lagging excavation face, the cross section of the metal formwork 4 is a rectangle without a bottom or a straight wall arch, and the length of the metal formwork 4 is 5m;
[0028] Step 3: Add steel fibers with a volume percentage of 2% to the prefabricated foam concrete, and use a concrete filling pump for coal mines to fill the foam concrete 3 with paste between the metal formwork 4 and the tunnel wall from bottom to top;
[0029] Step 4: After the foam concrete 3 reaches the desi...
Embodiment 2
[0040] An energy-absorbing and impact-resistant roadway support method, comprising the following steps:
[0041] Step 1: First excavate the roadway, combined with the designed roadway section size: width×height=5m×3m, determine the roadway excavation section size: width×height=9m×5.8m. , and then use the bolt 1 to support the roof and the two sides of the roadway excavation section, the length of the bolt 1 is 2.4m, the distance between the bolt 1 is 800mm, and the row spacing is 800mm;
[0042] Step 2: laying the metal formwork 4 on the 30m of the lagging excavation face, the section of the metal formwork 4 is a rectangle without a bottom or a straight wall arch, and the length of the metal formwork 4 is 3m;
[0043] Step 3: Add steel fibers with a volume percentage of 4% to the prefabricated foam concrete, and use a concrete filling pump for coal mines to fill the foam concrete 3 with paste between the metal formwork 4 and the tunnel wall from bottom to top;
[0044] Step 4...
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