Abstract
Large scale roof strata caving that occurs during coal extraction can irreversibly damage floor strata and result in riskier mining operations. Four research models incorporating floor water pressure were assessed for floor strata failure, using eight methods and two classification systems. A connection between floor strata failure and the coefficient of impact risk was developed. The derived equations represent a potentially effective method for providing a preliminary assessment of the risks associated with floor strata failure due to caving. A classification system of floor failure potential can be constructed to minimize risks during mining.
Zusammenfassung
Das Herabbrechen des Hangenden während des Kohleabbaus kann zu einer irreversiblen Zerstörung des Liegenden und zu einer Gefährdung des Bergbaubetriebes führen. Vier Modelle, die den Liegendwasserdruck berücksichtigen, wurden entwickelt, um den Bruch des Liegenden zu unter-suchen. Dabei wurden acht Methoden und zwei Klassifikationssysteme verwendet. Zwischen dem Bruch des Liegenden und dem Risikokoeffizienten wurde eine Beziehung aufgestellt. Die abgeleiteten Gleichungen stellen eine effektive Methode dar, um eine Vorabschätzung des Liegendbruches auf Grund des Abbaus zu erstellen. Für das Risikos eines Liegendbruchs wurde ein Klassifikationssystem erstellt, um die Gefahr während des Abbaus zu minimieren.
Resumen
El cavado a gran escala que ocurre durante la extracción de carbón puede dañar irreversiblemente la estructura del piso y resultar en un mayor riesgo en las operaciones mineras. Para relevar la falla estructural del piso se utilizaron cuatro modelos que incorporan la presión de agua del piso, con 8 métodos y 2 sistemas de clasificación. Se desarrolló una conexión entre la falla de la estructura del piso y el coeficiente de impacto de riesgo. Las ecuaciones derivadas representan un metodo potencialmente efectivo para ofrecer un relevamiento preliminar de los riesgos asociados con la falla de la estructura del piso debido al cavado. Es posible construir un sistema de clasificiación de potenciales fallas del piso para minimizar los riesgos durante la operación minera.
文章概要
煤炭回采期间大范围顶板冒落能够诱发底板不可逆转破坏并加重回采危险。基于八类方法和两种分类评价了4个包含底板含水层水压的底板破坏模型。建立了底板破坏和风险系数的关系,推导出顶板冒落引起底板破坏的风险评估方程。一种底板破坏分类体系可用以降低回采风险。
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Acknowledgments
Our deepest gratitude goes to the editors and the anonymous reviewers for their careful work and thoughtful suggestions that have helped improve this paper substantially. The authors also gratefully acknowledge the financial support of the National Science and Technology Supporting Program (Grant 2012BAB13B01), National Key Scientific Instrument and Equipment Development Program (Grant 2012YQ030126), Coal United Project of National Natural Science Foundation (Grant U1261203), China Geological Survey Project (Grant 1212011220798), and the National Science and Technology Major Project (Grant 2011ZX05035-004-001HZ).
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Xu, D., Peng, S., Xiang, S. et al. The Effects of Caving of a Coal Mine’s Immediate Roof on Floor Strata Failure and Water Inrush. Mine Water Environ 35, 337–349 (2016). https://doi.org/10.1007/s10230-015-0368-y
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DOI: https://doi.org/10.1007/s10230-015-0368-y