Dynamic rock fragmentation: oil shale applications

Conference · Tue Jan 01 00:00:00 EST 1980

OSTI ID:5154323

Boade, R. R.; Grady, D. E.; Kipp, M. E.

Explosive rock fragmentation techniques used in many resource recovery operations have in the past relied heavily upon traditions of field experience for their design. As these resources, notably energy resources, become less accessible, it becomes increasingly important that fragmentation techniques be optimized and that methods be developed to effectively evaluate new or modified explosive deployment schemes. Computational procedures have significant potential in these areas, but practical applications must be preceded by a thorough understanding of the rock fracture phenomenon and the development of physically sound computational models. This paper presents some of the important features of a rock fragmentation model that was developed as part of a program directed at the preparation of subterranean beds for in situ processing of oil shale. The model, which has been implemented in a two-dimensional Lagrangian wavecode, employs a continuum damage concept to quantify the degree of fracturing and takes into account experimental observations that fracture strength and fragment dimensions depend on tensile strain rates. The basic premises of the model are considered in the paper as well as some comparisons between calculated results and observations from blasting experiments.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5154323
• Report Number(s): SAND-80-0857C; CONF-801052-1
• Resource Relation: Conference: Society for Experimental Stress Analysis meeting, Ft Lauderdale, FL, USA, 12 Oct 1980
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
58 GEOSCIENCES
EXPLOSIVE FRACTURING
MATHEMATICAL MODELS
OIL SHALES
IN-SITU RETORTING
STRAIN RATE
STRAINS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
COMMINUTION
ENERGY SOURCES
FOSSIL FUELS
FRACTURING
FUELS
IN-SITU PROCESSING
PROCESSING
RETORTING
040300* - Oil Shales & Tar Sands- Drilling
Fracturing & Mining
580300 - Mineralogy
Petrology
& Rock Mechanics- (-1989)