TY  - GEN
AU  - Hanna,K.
AU  - Conover,D.
AU  - Haramy,Khamis Y.
TI  - Coal mine entry intersection behavior study
T2  - Report of investigations
PY  - 1990///
CY  - Washington, DC
PB  - United States Dept. of the Interior, Bureau of Mines
KW  - Shaft sinking
KW  - Rock mechanics
ER  -