E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 13/02 (2006.01) E02D 27/48 (2006.01) E02D 29/045 (2006.01) E21C 41/16 (2006.01) E02D 17/00 (2006.01)
Patent
CA 2202851
An undercut excavation method is provided, which is particularly suitable as an undercut-and-fill mining method, wherein concrete posts are inserted into holes drilled in the ground and are used to support a concrete floor poured on their top ends, which serves as a roof for the lower excavation level. The bottom ends of these posts rest on resilient elements to provide protection against seismic events or excessive ground movements. Excavation beneath such roof is thereby safely carried out in areas prone to seismic events such as rock bursts or earth quakes or to excessive ground movements. The concrete posts may be attached to the resilient elements at their bottom ends, thereby producing yielding posts suitable for such excavation. For still greater safety, a double post system may be used, which involves placing a second post beside the first after excavation on a given level and tying them all together with the concrete used to make the floor/roof for the next lower level of excavation. In mining this is called double-post mining or DPM.
LandOfFree
Undercut excavation with protection against seismic events... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Undercut excavation with protection against seismic events..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Undercut excavation with protection against seismic events... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1417142