Study on Reasonable Width of Coal Pillar in Thick Coal Seam Section
Authors
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Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China; School of Mines; China University of Mining & Technology, Xuzhou, 221116 ,CN
Zhang Kun -
Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China; School of Mines; China University of Mining & Technology, Xuzhou, 221116 ,CNMing Ji
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Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China; School of Mines; China University of Mining & Technology, Xuzhou, 221116 ,CNGuo Hongjun
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Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China; School of Mines; China University of Mining & Technology, Xuzhou, 221116 ,CNHe Wenrui
Keywords:
Thick coal seam; coal pillar width; coal pillar stress; reasonable widthAbstract
stability of the roadway space and the stability of the coal pillar itself. Based on the theory of coal pillar stress distribution, the reasonable retention width of the coal pillar in the deep buried thick coal seam is discussed. Reasonable coal pillar width and scientific roadway support parameters can maximize the bearing capacity of the surrounding rock, improve the stability of the roadway and reduce the coal mining loss. Reducing the size of existing large coal pillars in a stable stress interval is of great significance for coal mines to increase production and green mining. Through theoretical analysis, numerical simulation and on-site measurement, the stress, strain and displacement of the coal pillar are analyzed, and the width of the section coal pillar is reduced to a safe and scientific scope, supplemented by engineering verification.Therefore, it provides a reference for the narrow coal pillar mining in thick coal seam; learn from the meaning.
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References
Wilson A.N. (1972): An Hypothesis Concerning Pillar Stability. The Mining Engineer. No.6.
Krauland N, Soder P. E (1987): Determining pillar strength from pillar failure observation, Engrg. Min. J. August.
Zhu Ling, Yan Shaohong (2011): Numerical simulation study on top coal migration law of large mining height fully mechanized top coal caving [J]. Coal Mining, 01:11-13+40
Bai Zhifei (2012): Study on the law of mine pressure behavior and surrounding rock control technology in large mining height fully mechanized caving face[D]. Taiyuan University of Technology.
Li Dongsheng, Li Dehai, Song Changsheng (2003): Modified application of limit equilibrium theory in strip coal pillar design [J]; Journal of Liaoning Technical University; 2003-01.
Jia Guangsheng, Kang Lijun (2002): Study on the stability of coal pillars in mining roadways for fully mechanized caving mining [J]. Journal of China Coal Society, 27(1): 7~10.
Zou Youfeng, Chai Huabin (2006): Research Status and Existing Problems of Stability of Strip Coal Pillars in China [J]; Journal of Mining and Safety Engineering; 2006-02.
