The Safe Thickness of Top Plate in the Process of the Underground Excavation Transferred to Opencast Excavation

DOI

10.2991/isesce-15.2015.25How to use a DOI?

Keywords

Mining underground transferred to open pit operation.Mined-out area.The critical value.The safe thickness of top plate.Finite difference

Abstract

Zijinshan gold mine once to mining local underground copper resources, result in the mined-out area which elevation from 460 m to 570 m, the upper pit continue mining down the deep,one of the main problems in the safety production is that the large-scale mining equipment work whether fall into the mined-out area, it need to determine the problems of safe thickness of roof and reasonable value; First use six theoretical analysis methods, respectively was studied and calculating the safety thickness, then using finite difference software FLAC 3D are simulated on a 1-1 section, by comparing and comprehensive research, found that using numerical simulation method to get the calculation result is far above the theoretical calculation results. In the final analysis, determine the safe thickness of roof, which provide the decision basis for safety production.

Copyright

© 2015, 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  - Shiguo Sun
AU  - Weidong Liu
AU  - Yujuan Zhang
PY  - 2015/12
DA  - 2015/12
TI  - The Safe Thickness of Top Plate in the Process of the Underground Excavation Transferred to Opencast Excavation
BT  - Proceedings of the 2015 International Symposium on Energy Science and Chemical Engineering
PB  - Atlantis Press
SP  - 124
EP  - 129
SN  - 2352-5401
UR  - https://doi.org/10.2991/isesce-15.2015.25
DO  - 10.2991/isesce-15.2015.25
ID  - Sun2015/12
ER  -