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Keywords: moisture content
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Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0888
... and the moisture content of the floor. Data is also presented on the load bearing capacity of the floor as determined by in-situ plate tests. The 132 different plate tests from 17 coal mines form the largest database of its kind for the Illinois Basin mines, which helped develop new strength relationships for use...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-500
... ‘pure’ mill tailings unsuitable to be used in cut and fill stopes. Upstream Oil & Gas backfill material pipeline metals & mining percolation rate size distribution operation Reservoir Characterization stope moisture content cement consumption reservoir geomechanics strength...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-513
... technique. The experimental results show that the moisture content of shale is correlated with water activity using a multilayer adsorption theory. It is found that the adsorption isotherms of various shale formations can be scaled using their respective cation exchange capacity, into a single adsorption...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-224
... studies show that slurry backfilling does not work well for all types of mines. For example, in the Donovan study [4] this method has been recommended only for thin-seam coal mines. One detrimental effect of slurry backfilling is that it increases moisture content within the immediate layer...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-431
... drilling fluid chenevert sorption isotherm water activity reservoir characterization shale upstream oil & gas shale rock equation adsorption isotherm coefficient wellbore stability shale formation moisture content pore pressure wellbore integrity isotherm wellbore design...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7037
... plastic deformation subsidence creep metals & mining strength moisture content heap reproduce constitutive model deformation dependence ARMA 14-7037 A Crushed Salt Model with Creep, Compaction and Strain Softening, and Application to Tailings Heaps Lüdeling, C. and Minkley, W. IfG...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7739
... a tendency to adsorb water from drilling fluid. Using a concentrated drilling fluid, available models which are based on the ideal solution assumption fail to properly address the true shale-drilling fluid interaction. It is shown that the moisture content of shale is correlated with water activity using...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-138
... pours has been established as part of a QA/QC program. The database of the testing has the results of 17,212 UCS samples. underhand cut strength British Columbia outlier paste sample database stope moisture content Stillwater knowledge management paste plant river valley statistical...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-511
... popular method used in the Illinois Basin, called the Vesic-Speck approach, c1 in Eq.(1) is computed by using the laboratory triaxial strength relation developed by Speck [7]: MCqtriax 15.127.14 (3) where qtriax is the triaxial strength in MPa, and MC is the natural moisture content of the weak...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-565
..., absolute values of permeability for dry samples are higher than the moist (9% moisture content). Swelling induced by sorption of CH 4 and CO 2 in the coal matrix likely causes aperture reduction including cleat closure. Experimental observations indicate that the magnitude of swelling increases with pore...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-271
...], and selected mines in Colorado [1, 4]. Water infusion works by changing the nature of the coal. Bräuner [2] reports that: “on average, an increase in the moisture content of the coal from 1 to 5% causes a decrease in the uniaxial compressive strength to 60-70%”. He does not describe which coals exhibit...
Proceedings Papers

Paper presented at the 43rd U.S. Rock Mechanics Symposium & 4th U.S. - Canada Rock Mechanics Symposium, June 28–July 1, 2009
Paper Number: ARMA-09-191
... testing in a groove and moisture content of the rock sample. 1. INTRODUCTION a rock’s physical properties [2, 5, 6]; and CAI test conditions [3, 7]. Since its inception in the mid 1960s though perhaps more significantly since the mid-1980s following two landmark publications, the CERCHAR...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-207
... of the important influence of moisture content and the degree of weathering on the mechanical properties - particularly the q u and E parameters. The present findings show a good agreement with the results of previous studies on the mechanical properties of both Siltstone and Basalt. 1. INTRODUCTION...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0027
..., the influence of moisture content on the strength and deformation of sedimentary rocks was described in detail by Colback & Wiid (1965). For shale lithologies and a quartzitic sandstone, they reported a 50% loss in unconfined compresive strength when the rocks were fully saturated with water from their dry...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0511
... dislocation density Waste Isolation Pilot Plant Fluid Dynamics moisture content laboratory sandia national laboratory permeability Rock Mechanics in the National Interest, Elsworth, Tinucci & Heasley (eds), ¸2001 Swets & Zeitlinger Lisse, ISBN 90 2651 827 7 Characteristics of the Disturbed Rock Zone...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-0707
...- terization (Brodsky 1997c). Wellbore Design moisture content reservoir geomechanics single heater test specimen coefficient moduli Reservoir Characterization isotherm Yucca Mountain Upstream Oil & Gas Poisson thermal expansion post-test specimen conductivity maximum extent alcove 5...
Proceedings Papers

Paper presented at the The 35th U.S. Symposium on Rock Mechanics (USRMS), June 5–7, 1995
Paper Number: ARMA-95-0761
... ABSTRACT: This paper presents results of laboratory compaction testing to determine the influence of parti- cle size, size gradation and moisture content on compaction of crushed rock salt. Included is a theoretical analysis of the optimum size gradation. The objective is to evaluate the relative densities...
Proceedings Papers

Paper presented at the The 33rd U.S. Symposium on Rock Mechanics (USRMS), June 3–5, 1992
Paper Number: ARMA-92-0859
... ABSTRACT: Thermal conductivity measurements have been taken in the laboratory on specimens of Apache Leap tuff for a continuous range of moisture contents varying from oven-dried to vacuum saturated. Results for three types of tuff (fully welded, partly welded, and unwelded) are reported...
Proceedings Papers

Paper presented at the The 31st U.S. Symposium on Rock Mechanics (USRMS), June 18–20, 1990
Paper Number: ARMA-90-0921
... and the rate at which the backIfil was compacted (Fordham, 1988; Fordham et al. 1988). Grain size, moisture content, impurities and temperature variatiom can affect compaction creep (Fordham, 1988; Spiers et. al, 1989), but under in situ conditiom these parameters can be assnmed corotant. A series...
Proceedings Papers

Paper presented at the The 30th U.S. Symposium on Rock Mechanics (USRMS), June 19–22, 1989
Paper Number: ARMA-89-0047
... US government metals & mining Upstream Oil & Gas floor strata Illinois clay size content significant correlation natural moisture content compressive strength engineering index property moisture content immediate floor strata core analysis strength correlation laboratory...

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