The behavior of rock mass subjected to blasting is investigated using a modified distinct element method. Rock mass is modeled by distinct elements connected by contact-area and contact-point springs. Contact-area springs are used for fully contacted area of continuum, and contact-point springs for partially contacted area for discontinuous faces. Blast loading is considered by the radial contact force surrounding the charge. The behavior of an interior point of charge is formulated by the conservative equations and the equation of state of ideal gas. The first order reaction rate and the thermal explosion initiation are applied. Lax-Wendroff Flux-Corrected Transport Algorithm is used to solve the governing equations. To investigate the effects of detonation wave and gas pressure on the behavior of rock mass, two loading cases corresponding to loading shape and three loading cases to blasting energy are studied. The gas pressurization and stress wave mechanisms are observed from the analysis using the MDEM.
|Number of pages||1|
|Journal||International journal of rock mechanics and mining sciences & geomechanics abstracts|
|Publication status||Published - 1997 Apr|
|Event||Proceedings of the 1997 36th US Rock Mechanics ISRM International Symposium - New York, NY, USA|
Duration: 1997 Jun 29 → 1997 Jul 2
Bibliographical noteFunding Information:
This paper was supported by NON DIRECTED RESEARCH FUND, Korea Research Foundation.
All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology