Mad Mike
Geotechnical
- Sep 26, 2016
- 220
Has anybody ever heard of this method being used to treat cut hard rock embankments that are failing along a discrete sliding plane?
I've got some high (40 - 50')shale rock cuttings which I've designed to a 1:2(V:H) cut slope, however the shale bedding dips directly out of the slope at ~15deg and, despite the shale being relatively hard rock, I have field evidence suggesting that saturated clay films may be present on the bedding planes at depth.
In principle, if I were to drill and blast the shale bedding within the proposed cut face, I could disrupt the sliding planes and then excavate the face to a stable 1:2(V:H) batter. This would be more economic than losing industrial platform space by flattening my slopes to 15deg.
Any thoughts or major concerns?
Mike
I've got some high (40 - 50')shale rock cuttings which I've designed to a 1:2(V:H) cut slope, however the shale bedding dips directly out of the slope at ~15deg and, despite the shale being relatively hard rock, I have field evidence suggesting that saturated clay films may be present on the bedding planes at depth.
In principle, if I were to drill and blast the shale bedding within the proposed cut face, I could disrupt the sliding planes and then excavate the face to a stable 1:2(V:H) batter. This would be more economic than losing industrial platform space by flattening my slopes to 15deg.
Any thoughts or major concerns?
Mike