China Safety Science Journal ›› 2024, Vol. 34 ›› Issue (9): 165-173.doi: 10.16265/j.cnki.issn1003-3033.2024.09.1313

• Safety engineering technology • Previous Articles     Next Articles

Process risk prevention and control analysis for confined space operations based on improved ISM-FRAM-AHP

WANG Hanyu1(), TAN Qinwen1,2, LIU Juan1,2, LI Shuanglu1, TIAN Zhongwei1, CHEN Chao1   

  1. 1 School of Environment and Resources, Southwest University of Science and Technology, Mianyang Sichuan 621010, China
    2 Key Laboratory of Non-coal Mine Safety Technology in Sichuan Higher Education Institutions, Southwest University of Science and Technology, Mianyang Sichuan 621010, China
  • Received:2024-03-25 Revised:2024-06-26 Online:2024-09-28 Published:2025-03-28

Abstract:

To address the issues of ambiguous multi-level, multi-link and multi-functional interaction relationships and the adverse coupling effects during operations in confined spaces, FRAM was introduced. Combined with ISM and AHP, the hierarchical structure and judgment methods were optimized and improved. By dividing the risk hierarchical structure, the impact of system function coupling variability was quantified, and the importance of functional units and hierarchical structures was calculated. Through the results of functional variability and coupling loss degree, the input-output phenotype of upstream and downstream functional changes were determined, and the coupling mechanism among system functional elements was clarified. The results show that by applying the risk prevention and control model for operations in confined spaces based on the improved ISM-FRAM-AHP, 23 functional units and a 10-layer risk hierarchical functional network are obtained. The maximum values of functional variability and coupling loss degree are 4.36 (external environment F23) and 0.808 4 (formulating operation plans F2), indicating a relatively high operation safety risk degree. The functional changes are mainly manifested in sequence, goal and control. Four effective functional barrier measures, physical, symbolic, functional and invisible, are proposed for 8 failure links.

Key words: interpretive structural modeling (ISM), functional resonance analysis method (FRAM), analytic hierarchy process (AHP), confined space operations, operation process, risk prevention and control, hierarchical structure, coupling variation

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