Zonal disintegration of rocks around underground workings. Part II. Rock fracture simulated in equivalent materials
For a detailed testing of the effects discovered in situ, analysis of the patterns and origination conditions of fractured rock zones inside the bed around workings, and ways explosions affect the surrounding rocks, a program and a method of study on models of equivalent materials have been developed. The method of simulation on two- and three-dimensional models involved building in a solid or fissured medium a tunnel of a circular or arched cross section. The tests were done for elongate adit-type workings. At the first stage, three models were tested with different working support systems: anchor supports, concrete-spray supports and no supports. Zone formation is shown and described. Tests were continued on two groups of three-dimensional models to bring the model closer to in situ conditions. The presence of gaping cracks and heavily fractured zones deep in the interior of the bed with a quasicylindrical symmetry indicates that the common views concerning the stressed-strained state of rocks around underground workings are at variance with the actual patterns of deformation and destruction of rocks near the workings in deep horizons.
- OSTI ID:
- 6257110
- Journal Information:
- Sov. Min. Sci. (Engl. Transl.); (United States), Vol. 22:4; Other Information: Translated from Fiz. Tekh. Probl. Razrab. Polezn. Iskop.; 22: No.4, 3-13(Jul-Aug 1986)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
FRACTURE MECHANICS
MECHANICAL TESTS
SIMULATION
ROCKS
UNDERGROUND MINING
EXPLOSIVE FRACTURING
ROCK MECHANICS
STRUCTURAL MODELS
COAL MINING
COMPARATIVE EVALUATIONS
COMPRESSION STRENGTH
DEFORMATION
DESTRUCTIVE TESTING
FRACTURE PROPERTIES
FRACTURES
MINE ROADWAYS
PRESSURE EFFECTS
STRATA CONTROL
STRESS ANALYSIS
STRESSES
SUPPORTS
CARBONACEOUS MATERIALS
COMMINUTION
ENERGY SOURCES
FAILURES
FOSSIL FUELS
FRACTURING
FUELS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
MECHANICS
MINING
TESTING
TUNNELS
UNDERGROUND FACILITIES
012031* - Coal
Lignite
& Peat- Underground Mining- Strata Mechanics & Control- (1987-)
012010 - Coal
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