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Abstract <p>The process of rock arching in top coal caving with powered roof support systems is investigated. A direct proportional dependence between top coal flow duration and probability of static arching of rocks above an outlet hole, which prevents caving, is revealed. The new-developed method allows more accurate determination of the conditions and zones of rock arching in a model with one unit of powered roof support. When a number of powered roof support units operate in simultaneous top coal caving, the probability of arching may reduce greatly owing to the creation of a common zone of top coal flow.</p>

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Modeling Arching of Rocks in Top Coal Caving in Thick and Gently Dipping Coal Seams

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • A. N. Starodubov,
  • V. I. Klishin,
  • A. N. Kadochigova,
  • A. V. Kaplun

摘要

Abstract

The process of rock arching in top coal caving with powered roof support systems is investigated. A direct proportional dependence between top coal flow duration and probability of static arching of rocks above an outlet hole, which prevents caving, is revealed. The new-developed method allows more accurate determination of the conditions and zones of rock arching in a model with one unit of powered roof support. When a number of powered roof support units operate in simultaneous top coal caving, the probability of arching may reduce greatly owing to the creation of a common zone of top coal flow.