Study on Numerical Simulation of Permeability Variation with Caving Mining Method

Yong Mei

doi:10.4028/www.scientific.net/AMM.448-453.3893

Paper Titles

Study on the Coefficient of Surface Subsidence by Mining on the Condition of Thick Unconsolidated Layers and Thin Stratum
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Study on the Response of Surrounding Rock for Gob-Side Entry Retaining under the Mining
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UDEC Numerical Simulation Research of Mining Overlying Strata Movement Regulation
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Distribution of Underground Pressure Law and Fracture Zone Prediction Research of Overburden in Steep and Multiple Coal Seams Mining
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Study on Numerical Simulation of Permeability Variation with Caving Mining Method
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Ventilation Optimization for Multi-Level Mining Based on Global Ventilation Network Simulation
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Development and Experimental Research on a Formula of Water Inrush Coefficient
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A Review on Coalbed Methane and Water Two Phase Flow Research
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Extraction of Vanadium from Chinese Black Shale by Roasting Using Na₂CO₃-BaSO₄Mixture Addition
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 448-453Study on Numerical Simulation of Permeability...

Study on Numerical Simulation of Permeability Variation with Caving Mining Method

Abstract:

Surrounding rock constantly changes in the process of the stress concentration and release alternately with the method of caving mining, coal and surrounding rock break and form some channels for gas migration, causing the gas permeability o f surrounding rock changes. As the research object of coal mine in Shanxi with caving mining method, using the exponent relation of permeability and stress change, establishing the concept of relative permeability, based on FLAC^3D software, revealing the law of rock permeability variation in the mining process. The study shows: (1) the relative permeability can directly characterize the level of rock (coal) affected by mining; (2) in the vertical direction, the roof and floor have a wide range of relief, permeability increases and then decreases exponentially, affecting the range 30 ~ 40m; (3) overburden above the mined-out area damaged as an "O"-ring; (4) immediate roof obvious with a relief range of about 45 ~ 60m. Therefore the study has good guidance on gas drainage.

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Periodical:

Applied Mechanics and Materials (Volumes 448-453)

Pages:

3893-3896

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.448-453.3893

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Online since:

October 2013

Authors:

Yong Mei*

Keywords:

Caving Mining Method, FLAC^3D, Permeability

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