Improvement of the U-shaped steel sets for supporting the roadways in loose thick coal seam

Yu Yong Jiao, Liang Song, Xin Zhi Wang, Amoussou Coffi Adoko

Research output: Contribution to journalArticlepeer-review

88 Citations (Scopus)


This paper aims at improving the traditional U-shaped steel sets to efficiently support and stabilize the roadways in loose thick coal seam. The proposed supporting structure is an integrated shed system which is based on backfilling of chemical grouting material behind yieldable steel sets, i.e., metal mesh plus backfilled chemical grouting material plus double resistant geomembrane plus U-shaped steel sets. For implementation and verification, field experiments along with stress and deformation monitoring were conducted in the ventilation roadway of a top coal caving mining face. The results show that the proposed strategy can successfully solve the problems of roof fall, floor heave, large deformation and support damage of roadways in loose thick coal seam. In addition, comparing with the conventional supporting system of U-shaped steel sets, the improved system can also achieve a relatively faster excavation speed and reduce the overall support cost.

Original languageEnglish
Pages (from-to)19-25
Number of pages7
JournalInternational Journal of Rock Mechanics and Mining Sciences
Publication statusPublished - Jun 2013

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology


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