Abstract
A calculation system for the analysis of underground ventilation networks by means of a nodal pressure method using the skyline modified Choleski's decomposition scheme, named 'skyline nodal pressure method', has been studied. The generalized linear equations for solving steady state ventilation airflow have been developed using a connective function between nodes. The skyline decomposition scheme has an advantage on rapid convergence and the sake of computer memory space as compared with other schemes. Five examples of venti-lation networks have been calculated using a popular personal computer. A convergence criterion, that the maximum error of the summed airflow quantity in continuity at each node is less than 0.1 m3/min, was used for the calculations. Under the conditions that the fan-pressure is given as a constant value and that the acceleration factor is set at 1.4, the number of the iterations until convergence was not more than 13 for each network. The calcu-lation processing time by the skyline nodal method is roughly in proportion to the total number of nodes to the 3/2 power.
| Original language | English |
|---|---|
| Title of host publication | Innovative Mine Design for the 21st Centuryn; Proceedings of International Conference on Mine Design |
| Editors | W. F. Bawden, J.F. Archibald |
| Place of Publication | Netherland |
| Publisher | A.A. Balkema |
| Pages | 713-724 |
| Number of pages | 12 |
| ISBN (Print) | 9054103256 |
| Publication status | Published - Jul 1993 |
| Event | International Congress on Mine Design: Innovative Mine Design for the 21st Century - Kingston, Canada Duration: Aug 22 1993 → Aug 25 1993 |
Conference
| Conference | International Congress on Mine Design |
|---|---|
| Country/Territory | Canada |
| City | Kingston |
| Period | 8/22/93 → 8/25/93 |
All Science Journal Classification (ASJC) codes
- Earth and Planetary Sciences(all)
- Safety Research
- Public Health, Environmental and Occupational Health
