Strata control monitoring in a contiguous seam depillaring working

DOI

10.2991/rare-16.2016.55How to use a DOI?

Keywords

caving behaviour; strata control; contiguous workings; convergence; depillaring; mining induced stress; stress meters

Abstract

Most of the underground coal mines in the Indian Geo-mining conditions are developed and depillared by Bord and Pillar method. Caving behaviour and strata control are the major concerns to be considered while extraction of coal seams in such workings. This paper describes the results of a scientific strata control monitoring study during depillaring in a contiguous seam working. It includes instrumentation for determining the induced stresses in the pillars and roof-floor convergence in the galleries and junctions with distance from the goaf edges in the working. The mining induced stresses on the pillars were observed to be more in the top seam than that in the bottom seam working. Convergence monitoring was done with Telescopic Convergence Indicators (TCI) and Remote convergence recorders. In general, higher convergence was observed in the junctions as compared to the galleries. The junctions located at distant location suffered more convergence than the galleries is nearer to the goaf edge. Based on the field observation, convergence classification has also been done in terms of average distance of the goaf edge from the point of observation to assess the state of 'No-convergence', 'Initial convergence' and 'Maximum convergence'. The convergence observed in the bottom seam is more than that of the top seam

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/).

Download article (PDF)

TY  - CONF
AU  - Sahoo Sandeep K
AU  - A. Galav
AU  - B. Behera
AU  - Sharma Sanjay K.
AU  - G.S.P. Singh
PY  - 2016/11
DA  - 2016/11
TI  - Strata control monitoring in a contiguous seam depillaring working
BT  - Proceedings of the conference on Recent Advances in Rock Engineering (RARE 2016)
PB  - Atlantis Press
SP  - 348
EP  - 352
SN  - 2352-5401
UR  - https://doi.org/10.2991/rare-16.2016.55
DO  - 10.2991/rare-16.2016.55
ID  - SandeepK2016/11
ER  -