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Resistivity roof fall warning system in the white pine mine
98A
824239 MICROSEISMIC ROOF FALL WARNING SYSTEM DEVELOP-
MENI. Frmm TRIALS A ~ ~ A L FABRICATION. VOL 2. A P ~ I X C: COAL MINE DATA COLLECTION ~ . FINAL Fisher, C US Bureau of Mines report OFR 163(2)-81, 30 May 1980, 228P Summarlses the microselsmic event ard energy type data collected fer 23 coal mine roof falls during field tests (see item 824238). Avail: NTIS, Sl~CiDgfield, Va, 22161 USA
( ~ 82-1378~5) 824240 RESISTIVITY R(X)F FALL WARNING SYSvi~ IN THE WHITE PINE MINE Glbborm, M; Farstaal, J; Kehrman, R F US Bureau of Mines report OFR 53-80, 15 March 1979, 75P A method of morltQring roof stability in ur~le~grourA~ mines by detecting the charJges in resistivity of roof material was tested. The device was tested over a 16 month period at the White P i n e copper mine in Michigan. 7~Iree falls of groumd were monitured by as mamy as Ii sense, s. Data indicate a cc~relation between chamges in resistivity and Impending structural failure. Avail: NTIS, Sl~ringfield, Va, 22161 USA (PB 80-186547 )
824241 GEOZ~SlCAL W~m~X~UES A m ~ I ~ TO OIL ~ 2 MINING OPERATIONS Jackson, P; Bennett, H; Liakcw, R US Btlreau of Mines report 0FR 57-80, Feb 1978, 251P
To investigate the use of integrated geophysics for the placemerfc of oil shale min~s, data were gathered from the Ficeamce Creek Basin, Colarado, USA. Seismic, resistivity, a~diomagnetotellurics (AMT), induced polarisation (IP), gravity, a~d magnetic data were gathered. Available remote sensing data indicated a linear zone that aligned with faults fourzl in both test sites. The faults, one of which was confirmed by an observation well, were ir~licated by resistivity, AMT, and closely spaced seismic arrays. For analysis of integrated g e o ~ s l c a l data, interactive c o m ~ modelling was d~veloped in which seiamics, gravity, ani resistivity data can be simultaneously slmulated.
Presentation and interwetation of data 824242 PROBABILISTIC SOIL EXPLORATION: CASE H I S I ~ Y Wu, T H; Klnfun Wong J Geotech F ~ g Div ASCE, VI07, NGTI2j Dec 1981, P1693-1711 Probability concepts are applied to the interpretation of soil explcratlon data at a site where failure in a weak layer is ccmsidered Ix~bable. The st~soil is modelled as a two-class material with a soft clay la~eT included within a stiff clay. A hypothetical case history is constructed to illustrate the i r ~ e t a t i o n of d~ta obtair~d at different stages of the moil exl~laration prcgrsmlne. The J t ~ e m e ~ of ~ a c t l s l n g engi:~ers re~ardlng the site cor~lltions a r e ~ ' e s e n t e d as subjective ~robabilitie s •
824239 MICROSEISMIC ROOF FALL WARNING SYSTEM DEVELOP-
MENI. Frmm TRIALS A ~ ~ A L FABRICATION. VOL 2. A P ~ I X C: COAL MINE DATA COLLECTION ~ . FINAL Fisher, C US Bureau of Mines report OFR 163(2)-81, 30 May 1980, 228P Summarlses the microselsmic event ard energy type data collected fer 23 coal mine roof falls during field tests (see item 824238). Avail: NTIS, Sl~CiDgfield, Va, 22161 USA
( ~ 82-1378~5) 824240 RESISTIVITY R(X)F FALL WARNING SYSvi~ IN THE WHITE PINE MINE Glbborm, M; Farstaal, J; Kehrman, R F US Bureau of Mines report OFR 53-80, 15 March 1979, 75P A method of morltQring roof stability in ur~le~grourA~ mines by detecting the charJges in resistivity of roof material was tested. The device was tested over a 16 month period at the White P i n e copper mine in Michigan. 7~Iree falls of groumd were monitured by as mamy as Ii sense, s. Data indicate a cc~relation between chamges in resistivity and Impending structural failure. Avail: NTIS, Sl~ringfield, Va, 22161 USA (PB 80-186547 )
824241 GEOZ~SlCAL W~m~X~UES A m ~ I ~ TO OIL ~ 2 MINING OPERATIONS Jackson, P; Bennett, H; Liakcw, R US Btlreau of Mines report 0FR 57-80, Feb 1978, 251P
To investigate the use of integrated geophysics for the placemerfc of oil shale min~s, data were gathered from the Ficeamce Creek Basin, Colarado, USA. Seismic, resistivity, a~diomagnetotellurics (AMT), induced polarisation (IP), gravity, a~d magnetic data were gathered. Available remote sensing data indicated a linear zone that aligned with faults fourzl in both test sites. The faults, one of which was confirmed by an observation well, were ir~licated by resistivity, AMT, and closely spaced seismic arrays. For analysis of integrated g e o ~ s l c a l data, interactive c o m ~ modelling was d~veloped in which seiamics, gravity, ani resistivity data can be simultaneously slmulated.
Presentation and interwetation of data 824242 PROBABILISTIC SOIL EXPLORATION: CASE H I S I ~ Y Wu, T H; Klnfun Wong J Geotech F ~ g Div ASCE, VI07, NGTI2j Dec 1981, P1693-1711 Probability concepts are applied to the interpretation of soil explcratlon data at a site where failure in a weak layer is ccmsidered Ix~bable. The st~soil is modelled as a two-class material with a soft clay la~eT included within a stiff clay. A hypothetical case history is constructed to illustrate the i r ~ e t a t i o n of d~ta obtair~d at different stages of the moil exl~laration prcgrsmlne. The J t ~ e m e ~ of ~ a c t l s l n g engi:~ers re~ardlng the site cor~lltions a r e ~ ' e s e n t e d as subjective ~robabilitie s •