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Mining Publication: Shear Strength Evaluation of Clay-Rock Mixtures
Keywords: Clays Shear tests Slopes
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: January 2000
Authors: AT Iannacchione, LE Vallejo
Conference Paper - January 2000
Download PDF Document (2.19 MB)
NIOSHTIC2 Number: 20020960
Slope Stability 2000. Geotechnical Special Publication No. 101, Griffiths DV, Fenton GA, Martin TR, eds., Reston, VA: American Society of Civil Engineers, 2000 Jan; :209-223
At present, there is little knowledge concerning the shear strength of clays containing floating rock particles with concentrations from 0 to 30%. In practice, the effect of rock particles is typically disregarded in shear strength analysis. The two primary reasons for this are: 1) a lack of agreement concerning the influence of rock particles on material strength, and 2) the expense and difficulty of testing clay-rock mixtures with existing laboratory procedures. These factors have impeded the development of successful slope remediation design techniques for colluvium derived from resistant sedimentary rocks or spoil produced from surface mining. This study reviewed 31 technical papers which contain analysis of shear strengths for clay and sands with varying mixtures of rock particles. These technical papers, published over the last 40 years, are comprised of field case studies, laboratory investigations, and theoretical analysis. Evaluation of this body of knowledge has shown that the shear strength gradually increases with increasing percentages of floating particles in unsaturated clays.
Image of publication Shear Strength Evaluation of Clay-Rock MixturesConference Paper - January 2000
Download PDF Document (2.19 MB)
NIOSHTIC2 Number: 20020960
Slope Stability 2000. Geotechnical Special Publication No. 101, Griffiths DV, Fenton GA, Martin TR, eds., Reston, VA: American Society of Civil Engineers, 2000 Jan; :209-223
See Also
Analysis of Bench Crest Performance at the Yellowstone Mine: A Case Study
Applications of Ground-Based Radar to Mine Slope Monitoring
Applications of the Point Estimation Method for Stochastic Rock Slope Engineering
Assessing and Monitoring Open Pit Mine Highwalls
Creep Along Weak Planes in Roof and How It Affects Stability
Effects of Far-Field Shearing Deformation on Fracturing Around an Underground Opening
Estimation of Shear Strength Using Fractals as a Measure of Rock Fracture Roughness
Identifying Moisture Sensitive Roof Rocks in Coal Mines
Roof Bolt Response to Shear Stress: Laboratory Analysis
Shear Origin of Tension in Excavation-Induced Fractures
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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