Numerical Investigation into Evolution of Crack and Stress in Residual Coal Pillars under the Influence of Longwall Mining of the Adjacent Underlying Coal Seam

Joint Authors

Li, Xuehua
Wang, Xin
Wu, Yuechao
Liang, Shun

Source

Shock and Vibration

Issue

Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-18, 18 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2019-02-17

Country of Publication

Egypt

No. of Pages

18

Main Subjects

Civil Engineering

Abstract EN

Longwall mining of the adjacent coal seam with the presence of residual coal pillars overlying the seam can result in abnormal strata pressure and severe overburden failure, which poses a significant threat to mining safety.

The threat is mainly manifested in the form of intense coal or rock burst and hazardous interconnection between gobs.

This study employed the universal distinct element code (UDEC) to investigate the microscopic failure mechanism of the overlying residual coal pillars under the influence of longwall mining of an adjacent underlying coal seam in Yuanbaowan coal mine, China.

Using the Voronoi method, we innovatively visualized the evolution of cracks in residual pillars, revealed the mechanism behind the failure of pillars, and explored the evolution and distribution of abutment stress.

Also, strata movement characteristics during underlying panel extraction have been surveyed.

Based on the modeling results, effective measures are proposed to ensure safe mining under residual coal pillars.

This study might provide a certain reference for safe extraction of multiple seams in Datong Coalfield, China, and also in the central and western Appalachian Basin, United States, where many mining activities are carried out under residual pillars.

American Psychological Association (APA)

Wang, Xin& Wu, Yuechao& Li, Xuehua& Liang, Shun. 2019. Numerical Investigation into Evolution of Crack and Stress in Residual Coal Pillars under the Influence of Longwall Mining of the Adjacent Underlying Coal Seam. Shock and Vibration،Vol. 2019, no. 2019, pp.1-18.
https://search.emarefa.net/detail/BIM-1211023

Modern Language Association (MLA)

Wang, Xin…[et al.]. Numerical Investigation into Evolution of Crack and Stress in Residual Coal Pillars under the Influence of Longwall Mining of the Adjacent Underlying Coal Seam. Shock and Vibration No. 2019 (2019), pp.1-18.
https://search.emarefa.net/detail/BIM-1211023

American Medical Association (AMA)

Wang, Xin& Wu, Yuechao& Li, Xuehua& Liang, Shun. Numerical Investigation into Evolution of Crack and Stress in Residual Coal Pillars under the Influence of Longwall Mining of the Adjacent Underlying Coal Seam. Shock and Vibration. 2019. Vol. 2019, no. 2019, pp.1-18.
https://search.emarefa.net/detail/BIM-1211023

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1211023