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Mines Systems Safety Improvement Using an Integrated Event Tree and Fault Tree Analysis

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Abstract

Mines systems such as ventilation system, strata support system, flame proof safety equipment, are exposed to dynamic operational conditions such as stress, humidity, dust, temperature, etc., and safety improvement of such systems can be done preferably during planning and design stage. However, the existing safety analysis methods do not handle the accident initiation and progression of mine systems explicitly. To bridge this gap, this paper presents an integrated Event Tree (ET) and Fault Tree (FT) approach for safety analysis and improvement of mine systems design. This approach includes ET and FT modeling coupled with redundancy allocation technique. In this method, a concept of top hazard probability is introduced for identifying system failure probability and redundancy is allocated to the system either at component or system level. A case study on mine methane explosion safety with two initiating events is performed. The results demonstrate that the presented method can reveal the accident scenarios and improve the safety of complex mine systems simultaneously.

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Abbreviations

ET:

Event tree

FT:

Fault tree

HAZOP:

Hazard and operability study

STEP:

Safety training and evaluation process

PSA:

Probabilistic safety assessment

MSS:

Mines safety system

SB:

Safety barrier

THP:

Top hazard probability

ALARA:

As low as reasonably achievable

IE:

Initiating event

Ci :

ith consequence

PCk :

Probability of Ckth consequences

Si :

ith safety barrier

λi :

ith failure rate

Pi :

ith probabilities

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Authors and Affiliations

  1. Mines Systems Engineering Division, CSIR-Central Institute of Mining and Fuel Research, Dhanbad, 826 015, Jharkhand, India

    Ranjan Kumar (Life Member) & Achyuta Krishna Ghosh (Fellow)

Authors
  1. Ranjan Kumar
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  2. Achyuta Krishna Ghosh
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Correspondence to Ranjan Kumar.

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Kumar, R., Ghosh, A.K. Mines Systems Safety Improvement Using an Integrated Event Tree and Fault Tree Analysis. J. Inst. Eng. India Ser. D 98, 101–108 (2017). https://doi.org/10.1007/s40033-016-0121-0

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  • DOI: https://doi.org/10.1007/s40033-016-0121-0

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