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Physical and theoretical modeling of rock slopes against block-flexure toppling failure
Download full-text PDF. Study on the mechanisms of flexural toppling failure in anti-inclined rock slopes using numerical and limit equilibrium models. Article (PDF Available) in Engineering. Three case histories of toppling failures of rock slopes, and the methods used to ensure that failure did not disrupt operations below the slope, are described. The application of Goodman and Bray's limit equilibrium analysis of multi-block toppling failures to these three slopes is demonstrated. The mechanism of flexural toppling failure of jointed rock slopes has been investigated through a series of centrifuge experiments conducted on models manufactured from two types of materials.
Thesis on toppling rock failure pdf download
Log in to your subscription Username. Peer reviewed only Published between: Published from year: and Published to year: Advanced search Show search help. Rock Mechanics Symposium and 5th U. Authors Duncan C. The University of Missouri Rolla. ABSTRACT Three case histories of toppling failures of rock slopes, and the methods used to ensure that failure did not disrupt operations below the slope, are described.
The application of Goodman and Bray's limit equilibrium analysis of multi-block toppling failures to these three slopes is demonstrated. The first failure occurred in a 20 m high granite slope that was stabilized by removing the top 6 m and installing a number of tensioned rock anchors in the toe.
The second failure occurred in a sequence of folded sandstone, thesis on toppling rock failure pdf download, shale and coal. This slide was too large to stabilize, so the movement rate was monitored while mining continued in the pit below until shortly before failure took place. In the third failure, the top 8 m of a single 12 m high toppling block was removed by blasting to prevent further rotational movement.
This contrasts with sliding failures which occur when the geological structure dips out of the face Hoek and Bray Although the stability of toppling failures can be studied using numerical models Burman ; Byrne ; Cundall and physical models Barton ; Sotothese analyses can be time consuming and the required facilities may not be readily available.
However, Goodman and Bray's Goodman and Bray limit equilibrium analysis for multiblock failures now permits the analysis of toppling failures, and the selection of appropriate stabilization measures, to be carried out readily, thesis on toppling rock failure pdf download. This paper describes three toppling failures and shows the stabilization measures which were applied in two cases.
In the third case, movement was monitored with electronic distance measuring equipment while operations continued at the toe of the slide. The application of Goodman and Bray's analytical solution to these three examples is demonstrated, and the limitation of the technique in the design of slopes with a geological structure that could cause toppling is discussed.
This geological structure forms a series of tall, narrow slabs Figure 1. If the dimensions of a slab are such that its centre of gravity acts outside the base of the slab, then there is a potential for the slab to topple. This criteria is thesis on toppling rock failure pdf download by the relationship Goodman and Bray :- Equation in full paper Short slabs at the crest not meeting the criteria shown in equation 1and that do not slide on the base, are stable Figure 1, slabs 6, 7but longer slabs which topple slabs 3,4, 5 exert a thrust on the slab immediately below it on the slope.
This thrust produces a moment on the lower block which increases its tendency to topple, ie. Other Resources. About us Contact us Help Terms of use. Publishers Content Coverage Privacy. Administration log in. Sheriff's Encyclopedic Dictionary of Applied Geophysics, fourth edition.
Geology: Kinematics of Rock slope
, time: 13:26Thesis on toppling rock failure pdf download
Download full-text PDF. Study on the mechanisms of flexural toppling failure in anti-inclined rock slopes using numerical and limit equilibrium models. Article (PDF Available) in Engineering. Download full-text PDF Download full-text PDF Flexural Toppling Failure in Rock Slopes: From Theory to Applications Article (PDF Available) · December with 5, Reads. On the other hand, toppling-sliding failure can occur in flatter slopes or in larger scale slopes, where toppling columns force the rock near the toe of the slope to fail by sliding or shearing through intact material. The resulting failure surface is often approximately circular in shape. Studies of topplingsliding failure were initiated in.
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