Analysis of underground ventilation networks utilizing the skyline nodal pressure method

Kyuro Sasaki, Yutaka Fukuda, Hiroshi Miyakoshi

研究成果: 書籍/レポート タイプへの寄稿会議への寄与


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.
ホスト出版物のタイトルInnovative Mine Design for the 21st Centuryn; Proceedings of International Conference on Mine Design
編集者 W. F. Bawden, J.F. Archibald
Place of PublicationNetherland
出版社A.A. Balkema
出版ステータス出版済み - 7月 1993
イベントInternational Congress on Mine Design: Innovative Mine Design for the 21st Century - Kingston, カナダ
継続期間: 8月 22 19938月 25 1993


会議International Congress on Mine Design

!!!All Science Journal Classification (ASJC) codes

  • 地球惑星科学(全般)
  • 安全研究
  • 公衆衛生学、環境および労働衛生


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