Measurement and Inversion of the Stress Distribution in a Coal and Rock Mass with a Fault
Publication: International Journal of Geomechanics
Volume 21, Issue 11
Abstract
To more accurately determine the stress distribution law of coal and rock masses containing faults, the fA42 reverse fault of the Shihao coal mine is taken as an example to carry out an in situ stress test near the fault, and multilinear regression analysis is used to invert the tectonic stress field of the fault. The results show that the magnitude of the in situ stress in the area near the reverse fault varies greatly, and the main influence area of the fault is within 100 m of the fault. Outside the fault-affected area, the maximum principal stress and maximum shear stress of each rock layer decrease with the rock strength. The maximum principal stress and the maximum shear stress magnitudes of the coal seam increase closer to the fault, whereas those of the sandy mudstone and limestone first decrease and then increase sharply. The maximum value of the maximum principal stress and maximum shear stress of each rock layer are obtained at the fault interface. The research method in this paper accurately inverts the fault tectonic stress field, which has a certain guiding significance for the safe mining of coal mines.
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Acknowledgments
This project was supported by the National Natural Science Foundation of China (Grant No. 51874054) and the Major State Basic Research Development Program of China (Grant No. 2016YFC0801402).
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Published In
International Journal of Geomechanics
Volume 21 • Issue 11 • November 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Oct 28, 2020
Accepted: Jun 29, 2021
Published online: Sep 13, 2021
Published in print: Nov 1, 2021
Discussion open until: Feb 13, 2022
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