Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"coal bump"”.
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Theoretical analysis of bump and airblast events associated with coal mining under strong roofs
This investigation was conducted to study the bump and airblast problems associated with delayed caving of competent longwall roofs. The roofs were modeled as elastic beams on continuous elastic foundations subject to exponentially distributed abutment stress. Elastic beam theory was applied to …
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Experimental analysis of the post-failure behavior of coal and rock under laboratory compression tests
A major aspect of coal mine design is the structural stability of the mine. For establishing structural stability, the strength of the strata is determined by recovering the cores. The strength is determined through various methods and one method in particular is the Uniaxial Compressive Strength …
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Study of unstable rock failures using finite difference and discrete element methods, A
… strength tests and are extended to models of coal pillars and a simplified mining layout. The results of the finite difference simulations reveal that the instability identifiers and excess energy calculations provide a generalized methodology for assessing unstable failures within potentially …
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A new signal processing method for acoustic emission/microseismic data analysis
… algorithm has been evaluated with data from a coal mine and a 3-D concrete pile laboratory experiment. The accuracy of picking was found to be highly dependent on the choice of wavelet function, the decomposition scale, CF, and window size. The performance of the algorithm has been compared …