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The use of the direct optimized probabilistic calculation method in design of bolt reinforcement for underground and mining workings.

Krejsa M, Janas P, Yilmaz I, Marschalko M, Bouchal T - ScientificWorldJournal (2013)

Bottom Line: This provides more accurate solutions to probabilistic tasks, and, in some cases, such approach results in considerably faster completion of computations.DOProC can be used to solve efficiently a number of probabilistic computations.For the purposes above, a special software application-"Anchor"-has been developed.

View Article: PubMed Central - PubMed

Affiliation: Department of Structural Mechanics, Faculty of Civil Engineering, VŠB-Technical University of Ostrava, Ostrava, Czech Republic.

ABSTRACT
The load-carrying system of each construction should fulfill several conditions which represent reliable criteria in the assessment procedure. It is the theory of structural reliability which determines probability of keeping required properties of constructions. Using this theory, it is possible to apply probabilistic computations based on the probability theory and mathematic statistics. Development of those methods has become more and more popular; it is used, in particular, in designs of load-carrying structures with the required level or reliability when at least some input variables in the design are random. The objective of this paper is to indicate the current scope which might be covered by the new method-Direct Optimized Probabilistic Calculation (DOProC) in assessments of reliability of load-carrying structures. DOProC uses a purely numerical approach without any simulation techniques. This provides more accurate solutions to probabilistic tasks, and, in some cases, such approach results in considerably faster completion of computations. DOProC can be used to solve efficiently a number of probabilistic computations. A very good sphere of application for DOProC is the assessment of the bolt reinforcement in the underground and mining workings. For the purposes above, a special software application-"Anchor"-has been developed.

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Software desktop with a table for determination of rock mass rating (the geomechanical classification coefficient RMR), [4].
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Related In: Results  -  Collection


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fig9: Software desktop with a table for determination of rock mass rating (the geomechanical classification coefficient RMR), [4].

Mentions: In the first stage of the probabilistic calculation, a histogram with parametric probability distribution (Figure 7) of a reduced strength of hanging rock, σ, is determined pursuant to (10) (Figure 8) for the specified B width of the mining working, for the specified composition and thickness of the stratum. This histogram is needed for determination of the length and the loading of the anchors and for the geomechanical classification coefficient RMR [4]. For that purpose, a separate table in the application is used (Figure 9). The result is the histogram for the geomechanical classification coefficient RMR—rock mass rating (Figure 10).


The use of the direct optimized probabilistic calculation method in design of bolt reinforcement for underground and mining workings.

Krejsa M, Janas P, Yilmaz I, Marschalko M, Bouchal T - ScientificWorldJournal (2013)

Software desktop with a table for determination of rock mass rating (the geomechanical classification coefficient RMR), [4].
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3713651&req=5

fig9: Software desktop with a table for determination of rock mass rating (the geomechanical classification coefficient RMR), [4].
Mentions: In the first stage of the probabilistic calculation, a histogram with parametric probability distribution (Figure 7) of a reduced strength of hanging rock, σ, is determined pursuant to (10) (Figure 8) for the specified B width of the mining working, for the specified composition and thickness of the stratum. This histogram is needed for determination of the length and the loading of the anchors and for the geomechanical classification coefficient RMR [4]. For that purpose, a separate table in the application is used (Figure 9). The result is the histogram for the geomechanical classification coefficient RMR—rock mass rating (Figure 10).

Bottom Line: This provides more accurate solutions to probabilistic tasks, and, in some cases, such approach results in considerably faster completion of computations.DOProC can be used to solve efficiently a number of probabilistic computations.For the purposes above, a special software application-"Anchor"-has been developed.

View Article: PubMed Central - PubMed

Affiliation: Department of Structural Mechanics, Faculty of Civil Engineering, VŠB-Technical University of Ostrava, Ostrava, Czech Republic.

ABSTRACT
The load-carrying system of each construction should fulfill several conditions which represent reliable criteria in the assessment procedure. It is the theory of structural reliability which determines probability of keeping required properties of constructions. Using this theory, it is possible to apply probabilistic computations based on the probability theory and mathematic statistics. Development of those methods has become more and more popular; it is used, in particular, in designs of load-carrying structures with the required level or reliability when at least some input variables in the design are random. The objective of this paper is to indicate the current scope which might be covered by the new method-Direct Optimized Probabilistic Calculation (DOProC) in assessments of reliability of load-carrying structures. DOProC uses a purely numerical approach without any simulation techniques. This provides more accurate solutions to probabilistic tasks, and, in some cases, such approach results in considerably faster completion of computations. DOProC can be used to solve efficiently a number of probabilistic computations. A very good sphere of application for DOProC is the assessment of the bolt reinforcement in the underground and mining workings. For the purposes above, a special software application-"Anchor"-has been developed.

Show MeSH