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Numerical analysis on water-inrush process due to floor heave

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Journal of Coal Science and Engineering (China)

Abstract

To investigate the water-inrush process due to floor heave, simulation model was made and factors of mining height, immediate roof strength, water pressure, depth and strength of confiningbed, excavation step distance and bury depth were analyzed by using UDEC software. Five zones theory (containing two maximum main stress circles and three maximum main stress stratiform zones) along excavation direction was proposed, and two-ends-fixed beam mechanical model in maximum main stress circle was established. It is found that water inrush always occurs at the end of the beam where shear stress is higher, that is to say, it always occurs at near the starting cut and working face. Water pressure, height and strength of confiningbed are the determined factors, and mining height, immediate roof strength, excavation step distance and bury depth effect water inrush process due to floor heave.

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Authors and Affiliations

  1. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, 454010, China

    Bao-hua Guo  (郭保华)

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  1. Bao-hua Guo  (郭保华)
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Correspondence to Bao-hua Guo  (郭保华).

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Supported by the National Natural Science Foundation of China(10572047)

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Guo, Bh. Numerical analysis on water-inrush process due to floor heave. J Coal Sci Eng China 14, 225–229 (2008). https://doi.org/10.1007/s12404-008-0047-8

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  • DOI: https://doi.org/10.1007/s12404-008-0047-8

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