Stability, failure, and measurements of boreholes and other circular openings

• 作者: U.S. National Committee for Rock Mechanics.
• 其他作者: Roegiers, Jean-Claude. , National Research Council (U.S.). , National Research Council (U.S.). , National Research Council (U.S.).
• 出版: Washington, DC : National Academy Press 1993.
• 稽核項: 1 online resource (x, 92 pages) :illustrations.
• 標題: TECHNOLOGY & ENGINEERING , Borehole mining. , TECHNOLOGY & ENGINEERING Mining. , Boring. , Mining. , Electronic books.
• ISBN: 0309572258 , 9780309572255
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• 附註: "Panel on Borehole Stability"--Page iii. Panel chairman: Jean-Claude Roegiers. Stability, Failure, and Measurements of Boreholes and Other Circular Openings -- Copyright -- Contents -- EXECUTIVE SUMMARY -- INTRODUCTION -- FAILURE -- ABNORMAL STABILITY -- 1 EXCAVATION, MAINTENANCE, AND PERFORMANCE -- BEFORE THE EXCAVATION -- DURING EXCAVATION -- UNSUPPORTED OPENINGS -- CHANGE IN STRESSES -- CHANGE IN STRENGTH -- DECREASE IN SUPPORT CAPACITY -- SUPPORTED OPENINGS -- HOLE COLLAPSE -- INSUFFICIENT BONDING -- FORMATION DAMAGE -- LONG-TERM STABILITY -- 2 OBSERVATIONAL EVIDENCE -- FIELD OBSERVATIONS -- LABORATORY OBSERVATIONS 3 stability assessmentclosure measurements -- geophysical measurements -- in-situ stress conditions -- civil and mining engineering -- 4 rock-mass assessment -- scale of investigation and resolution -- mechanical properties and the stability of the openings -- primary factors affecting the remote assessment of rock-mass properties -- high-resolution surface sounding -- seismic methods -- electrical resistivity sounding -- radar sounding and radar tomography -- rock-mass exploration by means of pilot boreholes -- measurement-while-drilling (mwd) 5 analytical and numerical modelingunsupported openings -- elastic analysis -- inelastic analysis -- simplified bifurcation analysis -- isotropic far-field stresses -- numerical analysis of localization phenomena in deep boreholes -- nonlinear effects -- time-dependent effects -- scale effects -- supported openings -- elastic analysis -- nonlinear or time-dependent analysis -- intersections -- slabbing and exfoliation -- influence of preexisting discontinuities or structure -- discrete element method -- block theory Discontinuous deformation analysis6 conclusions -- references
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• 系統號: 005315506
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