Mechanics of coal mine bumps and the interaction between coal pillars mine roof and floor. Research report, 1971--1972

Technical Report · Thu Feb 22 04:00:00 EST 1973

OSTI ID:7218222

Crouch, S L; Fairhurst, C

The report describes research done on the mechanics of coal mine bumps over a 26-month period at the University of Minnesota. The general term 'coal mine bump' refers to the sudden and violent failure of in situ coal. The objective of the research was to develop computational procedures for predicting coal mine bumps in particular mining situations. Such procedures presumably would prove beneficial for planning extraction sequences - and perhaps even mining methods - in bump-prone coal deposits. Although no single set of circumstances is solely responsible for causing coal mine bumps, it is generally agreed that at least one of five conditions is necessary in order for them to occur: (1) the depth of cover exceed 500 ft., (2) the overlying strata are relatively strong and stiff, (3) the coal is structurally strong, (4) the floor does not heave readily, and (5) the mining method produces high stresses over a large area of the seam. Except for the last, these conditions relate to geological factors that are difficult to control. Control measures concern mining techniques. (GRA)

• Research Organization: Minnesota Univ., Minneapolis (USA). Dept. of Civil and Mineral Engineering
• OSTI ID: 7218222
• Report Number(s): PB-222898/9
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
011000 -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
012000* -- Coal
Lignite
& Peat-- Mining
COAL DEPOSITS
COAL MINES
COAL MINING
FLOORS
GEOLOGIC DEPOSITS
MECHANICAL STRUCTURES
MINES
MINING
RESOURCES
ROCK BURSTS
ROCK MECHANICS
ROOFS
SUPPORTS
UNDERGROUND MINING