Numerical Simulation of Pressure Relief for Extremely Thin Coal Seam as Protection Seam Based on UDEC

Li Ming Zhang

doi:10.4028/www.scientific.net/AMM.295-298.2879

Paper Titles

Analysis on Gas Geological Law of No.56 Coal Seam in Shengli Mine
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Efficiency Evaluation and Optimization of Green Mining for Coal Enterprises Based on DEA
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Influence of Physical Sensitizing Agent on Compression Resistance of Deep Water of Emulsion Explosives
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Influences of Mining Depths of Coal Faces in Duanwang Coal Mine on the Gas Emission Law
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Numerical Simulation of Pressure Relief for Extremely Thin Coal Seam as Protection Seam Based on UDEC
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Prediction Methods and Practice of Surface Movement and Deformation in Goaffilling Mining
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Research on the Occurrence Mechanism and Evaluation of Coal Mine Accidents
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Study on Feasibility of near Distance Coal Seam Group Ascending Mining
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Study on Influences of Reserving Coal Battlement along Goaf Tunnels on Rockburst
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 295-298Numerical Simulation of Pressure Relief for...

Numerical Simulation of Pressure Relief for Extremely Thin Coal Seam as Protection Seam Based on UDEC

Abstract:

Overlying strata stress distribution, pressure relief region and crack distribution characteristics are analyzed based on numerical simulation of pressure relief with extremely thin coal seam as protection seam used by UDEC. The result is a true reflection of overlying strata movement and fissures for extremely thin coal seam as protection seam. Studies have shown that the roof displacement in the face of protective layer promoting is big, and as far away from the protective layer, the roof displacement is gradually reduced, the base plate displacement is almost the same, but the roof and floor to stress have been fully release; after protective layer mining, an "O" type pressure relief crack area is formed above the goaf, which is gas rich region and gas channels at the same time and suitable for extracting high concentrations gas.

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Periodical:

Applied Mechanics and Materials (Volumes 295-298)

Pages:

2879-2883

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.295-298.2879

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Online since:

February 2013

Authors:

Li Ming Zhang

Keywords:

Fissures, Numerical Simulation, Rock Movement, UDEC

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References

[1] Zhou Shining, LIN Bai-quan, coal bed methane occurrence and flow theory [M] Beijing: Coal Industry Press, (1999).

Google Scholar

[2] LIN Bai-quan Cui Hengxin mine gas prevention theory and technology [M]. Xuzhou: China University of Mining and Technology Press, (1998).

Google Scholar

[3] Zhi-Yong Hao, LIN Bai-quan. UDEC-based protective layer mining strata movement of the numerical simulation and analysis [J] China Mining 2007 (6), 7 (16): 81 - 85.

Google Scholar

[4] QIAN Ming, Miao Hip Hing critical layer of strata control theory [M] Xuzhou: China University of Mining and Technology Press, (2003).

Google Scholar

[5] Jia-Lin Xu, Qian Ming. Overburden flaw distribution [J] Ground Pressure and Strata Management, 1997 (3 - 4): 210 - 212.

Google Scholar

[6] Shibi Ming. The Stope around coal gas migration numerical simulation [R]. Coal research data, (1996).

Google Scholar

[7] Sun Guangxiang mechanics basis of [M] Beijing: Science Press, (1983).

Google Scholar

[8] Cao Chengping close range on the protective layer mining practice [J]. Coal Science and Technology, 2006, (4).

Google Scholar