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Academic Journal of Engineering and Technology Science, 2020, 3(5); doi: 10.25236/AJETS.2020.030517.

Research on the settlement and deformation law of overlying rock under the influence of mining

Author(s)

Longhui Guo*

Corresponding Author:
Longhui Guo
Affiliation(s)

School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China
*Corresponding Author: 1363501559@qq.com

Abstract

Taking the mining of a certain coal seam as the research background, in order to study the settlement deformation law of the overlying rock under mining disturbance, combined with the physical and mechanical parameters of the actual rock layer, the mechanical model is established, and the flac3D numerical simulation is designed to determine the settlement deformation and horizontal displacement of the overlying rock under mining disturbance. And the vertical stress distribution law, the research results show that the settlement cloud map of the overburden rock under the influence of mining takes an “arch” shape, and the settlement value decreases with the increase of the arch height. The maximum settlement occurs in the center of the goaf, which is 3.51. m, which is 87.85% of the mining height; the horizontal displacement cloud map of the overburden rock under the influence of mining is distributed in a symmetrical "dipper" shape immediately above the goaf and in the middle of the overburden rock, and the maximum displacements are 50.2cm and 54.3cm respectively; Under the influence of mining, the vertical stress distribution area of overlying strata is divided into stress relief zone, concentrated zone and constant stress zone. The maximum stress value in the concentrated zone is 37.3MPa, and the maximum stress in the stress relief zone is 8.78 MPa; the research results can be similar rock formations the settlement problem provides a useful reference.

Keywords

Settlement deformation, echanical model, flac3D, umerical simulation

Cite This Paper

Longhui Guo. Research on the settlement and deformation law of overlying rock under the influence of mining. Academic Journal of Engineering and Technology Science (2020) Vol. 3 Issue 5: 131-141. https://doi.org/10.25236/AJETS.2020.030517.

References

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