Localization of mining-induced horizontal fractures along rock layer interfaces in overburden: Field measurements and prediction

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Abstract

The locations of mining-induced horizontal fractures along rock interfaces in the overburden of Donetsk Coal Basin were identified using an original experimental device. The device traps methane from horizontal fracture zone (100-fold coal seam thickness) over an active longwall mining excavation. Presence or absence of horizontal fractures along rock layer interfaces is correlated with physical characteristics of the overburden, such as thickness, uniaxial compressive strength of overburden rock layers, location of rock layer interfaces and thickness of extracted coal seams. As a result, a combined criterion based on these physical characteristics is proposed to predict the presence of overburden horizontal fracturing in coal mine operations.

Original languageEnglish
Pages (from-to)68-80
Number of pages13
JournalEnvironmental Geology
Volume48
Issue number1
DOIs
StatePublished - 1 Jun 2005

Keywords

  • Horizontal fracture
  • Longwall coal mining
  • Natural gas emission
  • Rock layer interface

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