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Mining industry

Innovative Approach to Composite Load-bearing for Gob-side Entry Retaining in Deep Mines

Strategic Insights

— 1 min read

Researchers from HeNan Polytechnic University, led by Meng Wang, have made significant breakthroughs in the field of mining and metallurgy. By introducing a new technique called gob-side entry retaining by roof cutting (CLGERRC), the team has demonstrated a substantial reduction in stress concentration and deformation of the surrounding rock in deep coal mines. This innovative approach has been proven to be more beneficial for roadbed stability, reducing the number of penetrating cracks and improving the sealing capacity.

Key Takeaways:

  • The CLGERRC technique effectively reduced the degree of stress concentration of the roadway compared to traditional gob-side entry retaining (TGER) by 28.3% and 44.4% respectively.
  • The peak vertical stresses in the solid coal side and roadbed backfill body (RBB) were reduced by 28.3% and 44.4% respectively, while the peak stresses in the roof were reduced by 54.4%.
  • The CLGERRC technology demonstrated a significant pressure releasing effect, reducing the deformation of the roof-to-floor and rib-to-rib by a considerable margin.
  • This innovative approach was found to be more beneficial for RBB stability under deep coal mines, reducing the number of penetrating cracks and improving the sealing capacity.
  • The CLGERRC technique was successfully tested in the Zhuzhuang Coal Mine, demonstrating its feasibility and effectiveness.
  • The field test results showed that the CLGERRC technology can effectively control the deformation of the roadway.
  • The research has been peer-reviewed and published in the journal Mining, Metallurgy & Exploration in 2025.

Statistics:

  • The CLGERRC technique reduced the peak vertical stresses in the solid coal side and RBB by 28.3% and 44.4% respectively.
  • The peak stresses in the roof were reduced by 54.4% by the CLGERRC technique.
  • The CLGERRC technology reduced the deformation of the roof-to-floor and rib-to-rib by a considerable margin.

Sources:

  • An Innovative Approach To Composite Load-bearing for Gob-side Entry Retaining In Deep Mines By Roof Cutting: a Case Study. Mining, Metallurgy & Exploration, 2025.
  • NewsRx. Investigators at HeNan Polytechnic University Discuss Findings in Mining and Metallurgy (An Innovative Approach To Composite Load-bearing for Gob-side Entry Retaining In Deep Mines By Roof Cutting: a Case Study). Journal of Engineering. October 20, 2025; p 1200.
  • Springer Heidelberg, Tiergartenstrasse 17, D-69121 Heidelberg, Germany.

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