Strata mechanics of hydraulic sub-level coal mining

Journal Article · Tue Jun 01 04:00:00 EDT 1982 · Int. J. Rock Mech. Min. Sci. Geomech. Abstr.; (United States)

DOI:https://doi.org/10.1016/0148-9062(82)91153-6· OSTI ID:6923720

Jeremic, M L

Strata mechanics have been studied by monitoring and observing underground mines, and by means of digital and physical models. On the basis of these integrated investigations three principal phenomena have been evaluated. Coal strata are displaced by roof movement along planes of stratification and differential shearing of coal pillars, and floor strata mainly by heave deformations; within sub-level structures are stress-concentration zones, stress-relaxed zones with pushes of abutment stress of more than 50 m, and the influence of mining stresses for 150-300 m; and bed separation and sagging, and strata breaks, are caused by caving of the immediate roof by block rotation, and the main roof by block crushing. Strata mechanics of sub-level hydraulic coal mining still are not well understood and require further investigations.

• OSTI ID: 6923720
• Journal Information: Int. J. Rock Mech. Min. Sci. Geomech. Abstr.; (United States), Journal Name: Int. J. Rock Mech. Min. Sci. Geomech. Abstr.; (United States) Vol. 19:3; ISSN IRMGB
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
CAVING MINING
COAL MINING
FLOORS
HYDRAULIC MINING
MECHANICS
MINING
RELAXATION
ROCK MECHANICS
ROOFS
STRATA MOVEMENT
STRATIFICATION
STRESS ANALYSIS
STRESS RELAXATION
STRESSES
UNDERGROUND MINING