Risk judgment technology of water accumulation in overlying goaf based on plate shell and fracture mechanics theory

Authors

TI Zhengyi, School of Mining, Liaoning Technical University, Fuxin 123000, China
ZHANG Feng, School of Mining, Liaoning Technical University, Fuxin 123000, China
QIN Hongyan, Safety Engineering Institute, North China Institute of Science and Technology, Beijing 101601, China
ZHU Zhijie, School of Mining, Liaoning Technical University, Fuxin 123000, China

Abstract

In order to avoid the threat of water penetration from the goaf of overlying seam No.6 during mining seam No.10 in Shengli coal mine of Linfen, Shanxi, plate-shells theory and fracture mechanics theory were used to establish the mechanics model of the development height of water-conducting fissure zone and the rupture depth of the floor. The water conducting fissure zone developmental height in districts I-VI of coal seam 10 is 46.77 m, 48.86 m, 56.05 m, 56.14 m, 56.33 m and 55.20 m, and the rupture zone depth of the floor in districts I-IV areas of coal seam 6 is 1.57 m, 1.14 m, 1.85 m and 1.26 m. By structuring criteria for water accumulation risk classification of overlying goaf and to determine the risk of accumulated water in the goaf of coal seam 6 during the mining process of coal seam10, the determination result shows that the water accumulation risk in districts I-IV areas of coal seam 6 is of the type of water inrush for seam 10, and would threaten the mining of coal seam10. The influence of the unminable area of seam 6 on the districts V-VI of seam 10 is of permeability of primary rock, and wouldn't threaten the coal extraction in the districts V-VI of coal seam 10.

Keywords

goaf water, plate-shell theory, fracture mechanics theory, water-flowing fractured zone, fractured zone

DOI

10.3969/j.issn.1001-1986.2019.01.021

Recommended Citation

TI Zhengyi, ZHANG Feng, QIN Hongyan, et al. (2019) "Risk judgment technology of water accumulation in overlying goaf based on plate shell and fracture mechanics theory," Coal Geology & Exploration: Vol. 47: Iss. 1, Article 22.
DOI: 10.3969/j.issn.1001-1986.2019.01.021
Available at: https://cge.researchcommons.org/journal/vol47/iss1/22

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