The Space-Time Evolution Rules of Plastic Failure Zone in Surrounding Rock of Stope Roof with Variable Length

DOI

10.2991/cimns-16.2016.52How to use a DOI?

Keywords

stope with variable length; roof surrounding rock; plastic failure zone; evolution rules

Abstract

In order to study the forming process, development trend and failure pattern of plastic zone in surrounding rock of stope roof with variable length, the analytical formula of the radius plastic zone, tangential stress and radial stress of surrounding rock were derived by using the limit equilibrium theory of elastic plastic mechanics. Based on the numerical simulation software, the space-time evolution rules of plastic zone gradual destruction in surrounding rock of stope roof with variable length was studied. Research shows that the stability of surrounding rock and the original rock should force, cohesion and internal friction angle is closely related, cutting to stress and radial stress increases with the increase of the cohesion increases, the radius of plastic zone with the cohesion and internal friction angle increases and decreases. Facet mining roof surrounding rock plastic zone formation produced at the initial stage of plastic failure, the development stage of the formation of elliptical partial plastic ring, extended late in the formation of "cyclic damage ring". Large mining roof surrounding rock plastic zone expansion of space from the shallow to the deep extension transfer, damage range from the lower part to upper part of the vertical extension, the plastic zone shape by circular circle development is the knife shaped and exhibited the gradual failure characteristics under the time and space condition.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xinfeng Wang
AU  - Longqin Li
AU  - Jiaqing Wu
PY  - 2016/09
DA  - 2016/09
TI  - The Space-Time Evolution Rules of Plastic Failure Zone in Surrounding Rock of Stope Roof with Variable Length
BT  - Proceedings of the 2016 International Conference on Communications, Information Management and Network Security
PB  - Atlantis Press
SP  - 210
EP  - 213
SN  - 2352-538X
UR  - https://doi.org/10.2991/cimns-16.2016.52
DO  - 10.2991/cimns-16.2016.52
ID  - Wang2016/09
ER  -