The deformation mechanism of soft coal roadway under dynamic mining influence and its optimization support design

DOI

10.2991/icadme-15.2015.144How to use a DOI?

Keywords

Soft coal roadway; Dynamic mining pressure; Surrounding rock control; Optimization support

Abstract

In light of the coal roadway deformation and breakage problems in soft rock conditions under dynamic pressure influence, based on coupled-supporting principle, combined theories and computer numerical simulation, the floor heave and spalling mechanism under the influence of multiple mining activities were analyzed and a rational pillar size was calculated and bolt-cable coupling improvement support projects were designed on the basis of the original support plan. The study result shows that it was expansion-flexural composite of floor heave and rib spalling affected by coal pillar size. It can effectively control the volume expansion at the roadway bottom plastic zone and reduce the impact of the surrounding rock pressure of two sides on the floor by increasing coal pillar size to 25m and using “add floor rock bolt & increase support density in two sides of roadway & enlarge anchor length” comprehensive reinforced support means.

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/).

Download article (PDF)

TY  - CONF
AU  - Z.G. Sun
AU  - Y. Gou
AU  - J. Yang
AU  - Z.W. Bi
AU  - S.G. Li
PY  - 2015/10
DA  - 2015/10
TI  - The deformation mechanism of soft coal roadway under dynamic mining influence and its optimization support design
BT  - Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering
PB  - Atlantis Press
SP  - 726
EP  - 732
SN  - 2352-5401
UR  - https://doi.org/10.2991/icadme-15.2015.144
DO  - 10.2991/icadme-15.2015.144
ID  - Sun2015/10
ER  -