Coal-mine-entry intersection behavior study. Rept. of Investigations/1991

Technical Report · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5311692

Hanna, K; Conover, D; Haramy, K

The report describes a rock mechanics instrumentation program conducted in a shallow underground coal mine in central Illinois. The research program was designed to provide a basic understanding of the structural behavior of entry intersections. A wide variety of instruments and measurement techniques including hydraulic borehole pressure cells, multiple-point borehole extensometers, roof bolt compression pads, and overcoring were employed to monitor roof stresses, pillar loading, strata movement, floor heave, and bolt loading before, during, and after intersection development. A summary of intersection design theories, failure modes, and support techniques is included, and instrumentation installation procedures and analysis methods are presented. The study identified two critical parameters that affect intersection stability: in situ horizontal stresses and geological discontinuities. Important design parameters for improving intersection stability are roof span and intersection geometry.

• Research Organization: Bureau of Mines, Denver, CO (United States). Denver Research Center
• OSTI ID: 5311692
• Report Number(s): PB-92-178599/XAB; BUMINES-RI--9337
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012031* -- Coal
Lignite
& Peat-- Underground Mining-- Strata Mechanics & Control-- (1987-)
COAL MINES
DESIGN
DEVELOPED COUNTRIES
ENGINEERING
FAILURE MODE ANALYSIS
FUNCTIONS
ILLINOIS
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
MECHANICS
MINE ROADWAYS
MINES
MINING
MINING ENGINEERING
NORTH AMERICA
RESEARCH PROGRAMS
RESPONSE FUNCTIONS
ROCK MECHANICS
ROOFS
SHEAR PROPERTIES
STRATA CONTROL
STRATA MOVEMENT
STRESS ANALYSIS
SUPPORT PILLARS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TUNNELS
UNDERGROUND FACILITIES
UNDERGROUND MINING
USA