Causes and control of coal-mine bumps. Report of Investigations/1988

Technical Report · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6408222

Haramy, K Y; McDonnell, J P

Coal mine bumps involve the violent, rapid failure of coal and rock around a mine excavation. Deep coal mines with strong roof and floor rocks and high-stress conditions frequently experience face and rib bumps. The bump problem is becoming more severe as mining depth increases, prompting efforts to control high stress in advance of mining. The Bureau of Mines report presents a review of the most widely used methods to detect and destress high-stress zones along coal faces and an investigation of stress-related bump problems and destressing techniques at a cooperating mine. Geotechnical instrumentation and microseismic methods were used to better understand bump occurrences in underground coal mines. Laboratory tests of the drilling-yield method for high-stress detection were conducted to determine the correlation between the volume of cuttings obtained and the magnitude of the applied stress at various confining pressures. A three-dimensional, multiple-seam computer modeling program, MULSIM, was used to evaluate the effectiveness of stress-relief methods. Modeling results indicate that dangerously high-stress areas can be controlled by either proper planning or destressing. Proper mine planning guidelines and destressing methods such as volley firing, hydraulic fracturing, and auger drilling are discussed.

• Research Organization: Bureau of Mines, Denver, CO (USA). Denver Research Center
• OSTI ID: 6408222
• Report Number(s): PB-90-268772/XAB; BUMINES-RI--9225
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012031* -- Coal
Lignite
& Peat-- Underground Mining-- Strata Mechanics & Control-- (1987-)
AUGER MINING
BENCH-SCALE EXPERIMENTS
COAL DEPOSITS
COAL MINING
COAL SEAMS
COMMINUTION
COMPUTER CODES
COMPUTERIZED SIMULATION
CONTROL
CORRELATIONS
DEPTH
DETECTION
DIMENSIONS
DRILLING
ENGINEERING
EVALUATION
EXPLOSIVE FRACTURING
FAILURES
FRACTURING
GEOLOGIC DEPOSITS
HYDRAULIC FRACTURING
M CODES
MATHEMATICAL MODELS
MEASURING METHODS
MECHANICS
MINERAL RESOURCES
MINING
MINING ENGINEERING
NATIONAL ORGANIZATIONS
RELAXATION
RESOURCES
ROCK BURSTS
ROCK MECHANICS
SEISMIC DETECTION
SIMULATION
STRESS ANALYSIS
STRESS RELAXATION
STRESSES
SUPPORT PILLARS
THREE-DIMENSIONAL CALCULATIONS
UNDERGROUND MINING
US BUREAU OF MINES
US DOI
US ORGANIZATIONS
VOLUME
WORKING FACES