NIOSHTIC-2 Publications Search

Influence of rock fractures and block boundary weakening on cavability.

Authors
Mahtab-MA; Dixon-JD
Source
Ann Mtg Soc Min Eng AIME New York 1975 Feb; :1-24
Link
NIOSHTIC No.
10009555
Abstract
This paper presents the results of a parametric study of the influence of natural features (stress field, rock strength, and strength and orientation of fractures) as well as the influence of induced features (undercut span, boundary slot, and other boundary-weakening measures) on the cavability of an undercut block of ore in mining by the block-caving method. The two-dimensional finite element analysis technique was used for this study. A coarse "mesh," along with linear homogeneous assumptions for rock properties, was used to model the problem of initiation of caving in a block of ore. Interpretation of the test results suggests that weakening the "abutments" of the block as well as certain orientations of natural fractures exercise significant influence on cavability. These findings hold promise for immediate application to known situations in block-caving mines.
Keywords
Mining; Mining industry; Rock mechanics; Geologic structures; Analytical processes; Materials testing; Structural analysis; Structural failure
Publication Date
19750201
Document Type
OP
Fiscal Year
1975
Identifying No.
OP 23-75
NIOSH Division
SRC;
Source Name
Ann. Mtg., Soc. Min. Eng., AIME, New York, Feb. 16-20, 1975, Preprint 75-Am-9
State
WA; NY
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division