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Identification and Application of Roof Bed Separation (Water) in Coal Mines

Identifizierung von Hangendspaltenbildung im Kohlenbergbau und deren Anwendung (Wasser)

Identificación y aplicación de separación lecho techo (agua) en minas de carbón

煤矿顶板离层的识别与应用

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Abstract

Bed separation can occur above coal mines when thick, hard roof strata overlie weaker roof strata. The water that accumulates represents a major hazard. We have categorized bed separations and indicators of threatening situations, and analyzed the morphological evolution of bed separation. Technologies exist to identify bed separation water, including its location and the risk it represents, and to calculate the maximum heights of bed and residual bed separations. These technologies were applied to the 1307 working face in the Xinji no. 1 coal mine, in Huainan, Anhui Province. Menacing bed separation was identified in the nappe fault zone. The maximum heights of the bed and residual bed separations were 5.92–6.90 m and 1.97–2.30 m, respectively.

Zusammenfassung

Hangendspaltenbildung kann über Kohlenabbauen auftreten, wenn mächtige, feste Hangendschichten weniger feste Nebengesteine überlagern. Wasseransammlung in den Spalten ist eine große Gefahr. Wir haben Hangendspalten und Indikatoren drohender Zustände kategorisiert und die morphologische Entwicklung der Schichtspaltenbildung analysiert. Es gibt Technologien zur Identifizierung des Schichtspaltenwassers, seiner Lage und des Risikos, und um die maximale Höhe der Hangend- und Liegendschichttrennung zu berechnen. Diese Technologien wurden in dem Streb #1307 der Xinji Nr. 1 Kohlenmine, in Huainan, Anhui Provinz angewendet. Bedrohliche Hangendspaltenbildung wurde in der Deckenstörungszone erkannt. Die größten Spalthöhen zwischen Hangend- und Liegendschicht betrugen 5.92-6.90 m and 1.97-2.30 m.

Resumen

La separación del lecho puede ocurrir en las minas de carbón cuando los estratos gruesos y duros del techo se encuentran sobre los estratos más débiles del techo. Se categorizaron las separaciones de lecho y los indicadores de situaciones potencialmente peligrosas y se analizó la evolución morfológica de la separación del lecho. Existen tecnologías para identificar el agua de separación del lecho, incluyendo su ubicación y el riesgo que representa, y para calcular las alturas máximas de las separaciones de lecho y lecho residual. Estas tecnologías se aplicaron a la cara de trabajo 1307 en la mina de carbón Xinji No. 1, en Huainan, provincia de Anhui. Se identificó la separación potencialmente peligrosa del lecho en la zona de falla de la napa. Las alturas máximas de las separaciones del lecho y del lecho residual fueron de 5,92~6,90 m y 1,97~2,30 m, respectivamente.

煤矿顶板离层的识别与应用

当软弱顶板之上覆盖厚硬顶板时,会形成顶板离层。离层内积聚水能够构成特殊类型水害。对离层及危害指标进行了分类,分析了离层形态的演化。目前离层水识别技术包括离层位置及风险的识别和最大与残余离层高度的计算。该技术已应用于安徽淮南新集矿一矿1307工作面,认为推覆体断层区存在潜在离层危险。最大离层高度和残余离层高度分别是5.92~6.90 m和1.97~2.30 m。

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Acknowledgements

This work was funded by the National Natural Science Foundation of China (41373095), the Research Project of Wanbei Coal-electricity Group Co. Ltd (2017), the University Natural Science Research Project of Anhui Province (KJ2017A445), and the Practical and Innovative Project of Coal Geology Bureau of Shanxi Province (2017).

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Authors and Affiliations

  1. School of Resources and Civil Engineering, Suzhou University, Suzhou, 234000, Anhui, China

    Herong Gui & Manli Lin

  2. National Engineering Research Center of Coal Mine Water Hazard Controlling, Suzhou, 234000, Anhui, China

    Herong Gui & Manli Lin

  3. School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, Anhui, China

    Xiaomei Song

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  1. Herong Gui
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  2. Manli Lin
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  3. Xiaomei Song
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Correspondence to Herong Gui.

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Gui, H., Lin, M. & Song, X. Identification and Application of Roof Bed Separation (Water) in Coal Mines. Mine Water Environ 37, 376–384 (2018). https://doi.org/10.1007/s10230-018-0518-0

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