Evolution and effect of the stress concentration and rock failure in the deep multi-seam coal mining

Mingwei Zhang, Hideki Shimada, Takashi Sasaoka, Kikuo Matsui, Linming Dou

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Supports crushing accident occasionally occurs in the protected seam exploitation of deep multi-seam coal mining structure and results in adverse effect to the production. To prevent its recurrence in a newly developed working field, a 3D numerical extraction model was built based on the geologic and mining conditions of Jining coal mine to evolve the changes, state and characteristics of the reconstructed vertical and lateral stress in rock interlayer after protective seam exploitation. Stress release and increase zones of this mining structure were separated. Mining-induced localized stress concentration and the interlayer rock failure behavior were explored. The action of concentrated stress on the hydraulic supports in protected seam was discussed upon the major stress redistribution. Using the infinitesimal strain method, a mechanical model was created to further explore, from the vertical and lateral directions, the cause and mechanism of localized stress concentration and rock failure behavior in rock interlayer. The field investigation was finally performed to verify the numerical and mechanical results, and the essential control measures were proposed to prevent this accident. Key findings of this study bring some new insights into the deep multi-seam coal extraction and help to promote a more reliable underground mining.

Original languageEnglish
Pages (from-to)629-643
Number of pages15
JournalEnvironmental Earth Sciences
Volume72
Issue number3
DOIs
Publication statusPublished - Jan 1 2014

Fingerprint

coal mining
Coal mines
coal
Stress concentration
rocks
Rocks
accidents
rock
Accidents
underground mining
accident
Coal
crushing
Crushing
control methods
fluid mechanics
adverse effects
Hydraulics
coal seam
coal mine

All Science Journal Classification (ASJC) codes

  • Soil Science
  • Environmental Chemistry
  • Water Science and Technology
  • Pollution
  • Global and Planetary Change
  • Geology
  • Earth-Surface Processes

Cite this

Evolution and effect of the stress concentration and rock failure in the deep multi-seam coal mining. / Zhang, Mingwei; Shimada, Hideki; Sasaoka, Takashi; Matsui, Kikuo; Dou, Linming.

In: Environmental Earth Sciences, Vol. 72, No. 3, 01.01.2014, p. 629-643.

Research output: Contribution to journalArticle

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