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| Content Provider | Springer Nature Link |
|---|---|
| Author | Liang, De xian Jiang, Zhen quan Guan, Yun zhang |
| Copyright Year | 2014 |
| Abstract | Seam floor water-inrush accidents in mine stopes are often associated with fault structures in which water pressure resistance capacities are less than that of the intact seam floor. A new in situ water resistance capacity test was recently developed and used to determine the water resistance properties of a section of a normal fault. The in situ tests defined initial seepage conditions, the state of seepage after flow stabilized, and the measure and calculation of water resistance capability. The test results were used to calculate the unit seepage failure resistance strength, a quantification of the water pressure resistance capacity. It appears that such tests can be used to better evaluate the safety of coal extraction, and whether coal seams under inferred threat from water inrushes can be excavated safely without dewatering or depressurizing the underlying confined aquifers.Unkontrollierte Wassereinbrüche in Kohlebergwerke aus Grundwasserleitern im Liegenden treten häufig beim Auffahren von Störungsstrukturen auf, wo die Wasserdruckbeständigkeit der Sohlbereiche gegenüber intakten Abbausohlen verringert ist. Aktuell neu entwickelte Testverfahren zur Bestimmung der Wasserdruckbeständigkeit ermitteln die (hydraulischen) Eigenschaften von Sohlbereichen mit steil stehenden Verwerfungszonen. Die in situ Tests definieren die Ausgangszuflussbedingungen, die Wasserzutrittmengen nach stabilisiertem Zufluss und die Leistungsfähigkeit des Zuflusswiderstandes. Die Testergebnisse können genutzt werden, um Grenzwerte des Zuflusswiderstandes zu berechnen und die Kapazität der Wasserdruckbeständigkeit zu quantifizieren. Solche Tests werden verwendet, um Sicherheiten im Kohleabbau genauer zu quantifizieren. Bei Abbauführungen in Wasser-Gefährdungsbereichen können sie die Sicherheit in der Form zu erhöhen, dass Entwässerungen bzw. Druckentlastungen in Liegenden, gespannten Aquiferen vermieden werden.Los accidentes de irrupción de agua en fondos de veta en hoyos de minas, son frecuentemente asociadas a fallas estructurales en las cuales las capacidades de resistencia a la presión de agua son menores que aquellas de fondos de vetas intactos. Se desarrolló un nuevo ensayo para medir in situ la capacidad de resistencia al agua que fue usado para determinar las propiedades de resistencia al agua de una sección de una falla normal. Los ensayos in situ definen las condiciones de filtración inicial, la cantidad que se filtra después de estabilizado el flujo y la capacidad de resistencia al agua medida. Los resultados del ensayo fueron usados para calcular la unidad de fuerza de resistencia a la infiltración que presenta la falla, una cuantificación de la capacidad de resistencia a la presión del agua. Estos ensayos pueden ser usados para una mejor evaluación de la seguridad para la extracción de carbón y para conocer si las vetas de carbón bajo amenaza de irrupciones de agua pueden ser excavadas en forma segura sin evacuación o despresurización de los acuíferos subyacentes confinados.通常,断层抗水压能力比完整煤层底板小,因此煤层底板突水多与断层构造相关。本文研究了一种新型底板抗水压能力现场测试方法并评价了某正断层的抗水压性能。通过现场实测定义了起始渗流条件、稳态渗流和抗水压能力的测试与计算方法。利用测试结果计算了表征底板抗水压能力的量化指标:单位渗流破坏阻抗能力。该测试结果可用于评价受水压威胁煤层在不进行底板含水层疏水或降压条件下是否可以安全开采。 |
| Starting Page | 320 |
| Ending Page | 328 |
| Page Count | 9 |
| File Format | |
| ISSN | 10259112 |
| Journal | Mine Water and the Environment |
| Volume Number | 34 |
| Issue Number | 3 |
| e-ISSN | 16161068 |
| Language | Chinese |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2014-12-28 |
| Publisher Institution | International Mine Water Association (IMWA) |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | In-situ measurement Water inrush Permeability Geology Hydrogeology Water Quality/Water Pollution Energy Economics Ecotoxicology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Water Science and Technology Geotechnical Engineering and Engineering Geology |
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