An improved influence function method for predicting subsidence caused by longwall mining operations in inclined coal seams

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• 作者：Yi Luo
• 关键词：Subsidence prediction ; Influence function method ; Inclined coal seam ; Longwall mining
• 刊名：International Journal of Coal Science & Technology
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：2
• 期：3
• 页码：163-169
• 全文大小：1,268 KB
• 刊物类别：Fossil Fuels (incl. Carbon Capture); Geotechnical Engineering & Applied Earth Sciences; Mineralogy;
• 刊物主题：Fossil Fuels (incl. Carbon Capture); Geotechnical Engineering & Applied Earth Sciences; Mineralogy;
• 出版者：China Coal Society
• ISSN：2198-7823

文摘

Prediction of surface subsidence caused by longwall mining operation in inclined coal seams is often very challenging. The existing empirical prediction methods are inflexible for varying geological and mining conditions. An improved influence function method has been developed to take the advantage of its fundamentally sound nature and flexibility. In developing this method, the original Knothe function has been transformed to produce a continuous and asymmetrical subsidence influence function. The empirical equations for final subsidence parameters derived from collected longwall subsidence data have been incorporated into the mathematical models to improve the prediction accuracy. A number of demonstration cases for longwall mining operations in coal seams with varying inclination angles, depths and panel widths have been used to verify the applicability of the new subsidence prediction model.