Calculation of fracture and permeability enhancement from underground explosions in coal
Conference
·
OSTI ID:7355853
We use one- and two-dimensional computer programs to study explosive-induced fracturing and permeability enhancement. The total failure-induced deviatoric strain, a calculable parameter related to rock fracture, is used to correlate calculations with measurements. This parameter is made up of two parts, that associated with pure shear distortion and that associated with shear distortion from tensile failure. The total failure shear strain can be related to intensity of fracture, and the tensile portion can be related to the volume of tensile fractures. The latter value can be considered a measure of the crack volume generated following tensile failure. We correlate our calculations with measurements from field and laboratory experiments for both single and multiple explosions.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7355853
- Report Number(s):
- UCRL-77945; CONF-760905-12
- Country of Publication:
- United States
- Language:
- English
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