Retaining a Goaf-Edge Gateroad in a Three-Entry Panel Layout

Abstract:

In underground coal mining, a goaf-edge gateroad (GEG) in a longwall panel is often retained in full length, i.e. the length of the retained GEG is the same as the length of longwall block, for ventilation and gas control. In some cases, it can be extremely difficult to retain a GEG in its full length due to complex geological and geotechnical conditions. To address the issue, the concept of retaining a GEG in sections is introduced. The retained length of a GEG is optimised through the analysis of the inner and outer structures of surrounding rocks of the GEG. Retaining a GEG in sections avoids the intensive roof movement period and possible structural failure of its support. This method of retaining a GEG in sections was successfully applied in panel 24202 of Shaqu coal mine.

• Periodical: Advanced Materials Research (Volumes 524-527)
• Pages: 681-685
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.524-527.681
• Online since: May 2012
• Authors: Jun Hua Xue, Sheng Xue
• Keywords: Coal Mining, Control of Surrounding Rocks, Inner and Outer Structures, Retained Goaf-Edge Gateroad, Three-Entry Panel Layout

References

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[4] T.Y. Qi: Support in a Retain a Goaf-edge Gateroad (China University of Mining and Technology, China 1996).

[5] J.G. Han: Roof Structure and Support of a Retain a Goaf-edge Gateroad (China University of Mining and Technology, China 2009).