Analysis of Surface Subsidence and Relative Movements of Underground Rock Strata over an Inclined Longwall Panel

Jump To References Section

Authors

  • S. V. S. S. Ramalingeswarudu
     General Manager (Retired), SCCL, Kothagudem – 507101, Telangana ,IN
  • Ramesh Dundra
     Deputy Manager, SCCL, Kothagudem – 507101, Telangana ,IN
  • V. R. Sastry
     Professor, HAG, Department of Mining Engineering, NITK Surathkal - 575025, Karnataka ,IN
  • Ch. S. N. Murty
     Professor, HAG, Department of Mining Engineering, NITK Surathkal - 575025, Karnataka ,IN

DOI:

https://doi.org/10.18311/jmmf/2022/32099

Keywords:

Longwall, Multipoint Borehole Extensometer, Profile Function, Subsidence

Abstract

Subsidence monitoring and analysis is an integral part of longwall operation. It provides an assessment of the effect of mining on the surface. In this study, subsidence data is recorded periodically over a longwall panel of 250m of face length and 2333m of gate roadway length for a duration of 12 months. The working seam is inclined at 10 degrees (1 in 5.5) towards tailgate side. Based on the measured data, a profile function is derived indicating vertical ground movement over the major section of the longwall panel. The bed separation of layers in the roof rock is also measured by installing Multi-Point Borehole Extensometer (MPBX) at the centre of the longwall panel and its results are correlated with those of subsidence monitored data. It is found from the analysis of subsidence and MPBX data that there is a good correlation between the bed separation sequence and the subsidence over longwall panel.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

Downloads

Published

2023-03-14

How to Cite

Ramalingeswarudu, S. V. S. S., Dundra, R., Sastry, V. R., & Murty, C. S. N. (2023). Analysis of Surface Subsidence and Relative Movements of Underground Rock Strata over an Inclined Longwall Panel. Journal of Mines, Metals and Fuels, 70(9), 484–491. https://doi.org/10.18311/jmmf/2022/32099

Issue

Volume 70, Issue 9, September 2022

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Crossref
Scopus
Google Scholar
Europe PMC

 

References

Asadi, A., Shakhriar, K. & Goshtasbi K. (2004). Profiling function for surface subsidence prediction in mining inclined coal seams. Journal of Mining Science, 40. https://doi.org/10.1023/B:JOMI.0000047856.91826.76 DOI: https://doi.org/10.1023/B:JOMI.0000047856.91826.76

John Loui Porathur & Chandrani P. Verma. (2017). Subsidence prediction studies and field validation over Panel LW1 in seam I at Adriyala Longwall Project, SCCL. Report of Scientific Study of Adriyala Longwall Project by CSIR-CIMFR.

Mine Subsidence Engineering Consultants. (2007). Introduction to Longwall Mining and Subsidence. Revision A Report.