Reliability Study on Bolt Support Systems of Coal Roadway under Group Failure Modes Based on Maximal Entropy Principle

Abstract:

Currently, there are several failure modes in the blot structure of coal roadway. Existing reliability analysis method of blot support structure of coal roadway does not consider the relevance existing among these methods, thus reducing reliability of the blot structure. In order to fix this defect, we put forward the group failure mode of coal roadway bolt structure analysis method taking the relevance issue into consideration. At the same time, we analyze the probability characteristic of blot structure parameters based on the maximum entropy principle; through the normal distribution curve express the coal - rock characterization of cohesion and the friction angle. The Monte Carlo simulation method calculates reliability of the model with the matlab. The results show that the maximum entropy can effectively reflect the probability characteristic of variables in coal roadway bolt structure. Furthermore, Group failure modes allow for the relevance among existing failure modes in the same group, thus in the general, providing more scientific and accurate responses evaluating the overall reliability of the system. Under the group failure modes, the results of reliability are larger than those under traditional reliability analysis method with same conditions.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 1009-1013
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.1009
• Online since: November 2012
• Authors: Feng Wang, Tie Jun Cui
• Keywords: Coal Roadway Bolt Structure, Group Failure Mode, Maximum Entropy Principle, Monte Carlo Simulation Method, Reliability

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