Causes and control of coal mine bumps

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

OSTI ID:5720465

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. This Bureau of Mines report presents a review of the most widely used methods to detect and distress 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.

• Research Organization: Bureau of Mines, Pittsburgh, PA (USA)
• OSTI ID: 5720465
• Report Number(s): 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-)
016000* -- Coal
Lignite
& Peat-- Health & Safety
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
ACOUSTIC MEASUREMENTS
COAL DEPOSITS
COAL MINING
COAL SEAMS
COMPUTER CODES
COMPUTERIZED SIMULATION
ENGINEERING
FAILURE MODE ANALYSIS
GEOLOGIC DEPOSITS
GEOLOGIC MODELS
GROUND SUBSIDENCE
M CODES
MECHANICS
MINERAL RESOURCES
MINING
MINING ENGINEERING
RESOURCES
ROCK MECHANICS
SAFETY
SIMULATION
STRATA CONTROL
STRATA MOVEMENT
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
UNDERGROUND MINING