Coal mine ground control /
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
New York :
Wiley,
c1978
New York : c1978 |
| Subjects: |
Table of Contents:
- MINE LAYOUTS AND GROUND CONTROL PRACTICES IN UNDERGROUND COAL MINES: Room-and-pillar mining
- Longwall mining
- Shortwall mining
- Types of ground control failures
- ROCK PROPERTIES AND IN-SITU STRESSES: Basic rock properties
- Methods of rock testing
- Failure criteria
- Rock behavior
- Sources and estimation of in-situ stresses
- PREMINING ROOF STABILITY CLASSIFICATION: Underground features
- Surface features
- Classification of roof hazard conditions for mine layouts
- Seismic method of detecting geological anomalies
- DESIGN OF UNDERGROUND SINGLE AND MULTIPLE OPENINGS: Homogeneous materials
- Inhomogeneous and anisotropic materials
- The immediate roof and rectangular openings
- ROOF BOLTING: Point-anchored or tensioned bolts
- Full-length-anchored or nontensioned resin bolts
- COAL PILLARS: Pillar loading
- Stress distribution within pillars
- Pillar strength
- Interaction of pillar, floor, and roof
- GROUND CONTROL IN LONGWALL AND SHORTWALL MINING: Factors affecting panel layout
- Advanced versus retreat longwall mining
- Longwall layouts
- Strata mechanics
- Face powered supports
- Shortwall panel design and strata mechanics
- SURFACE SUBSIDENCE: Descriptive theories
- Continuum mechanics theories
- Determination of trough subsidence
- Subsidence measurement techniques
- Surface damage
- Prevention of damage to surface facilities
- BUMPS AND GAS OUTBURSTS: Causes and occurrences of coal bumps
- Control of coal bumps
- Gas outbursts
- INSTRUMENTATION: Load-measuring devices
- Stress-measuring devices
- Deformation-measuring devices
- Strain-measuring devices
- Longwall and shortwall face measurement devices
- SPECIAL SUPPOTS: Timber supports
- Yieldable arches, shotcrete, and concrete linings
- Methods of roof and rib reinforcement
- Roof truss
- Split sets
- Roof bolting Patterns at four-way entry intersections