Skip to main content
Log in

Permeability of the Coal Seam Floor Rock Mass in a Deep Mine Based on In-situ Water Injection Tests

Permeabilität des Kohlefözliegenden in einer Tiefbaugrube auf Basis von Injektionstests

Permeabilidad de la masa de roca del piso de la veta de carbón en una mina profunda basada en pruebas de inyección de agua in situ

大采深矿井煤层底板渗透性现场注水试验

  • Technical Article
  • Published:
Mine Water and the Environment Aims and scope Submit manuscript

Abstract

In-situ water injection tests were carried out to study the hydraulic conductivity of the roadway floor strata in the Chengjiao coal mine. Reliable water pressure test data were obtained to assess the permeability of the floor’s rock mass. The initial water pressure of the intact rock mass was greater in the first water injection test, which indicated that its permeability was low. The water pressures increased when the test was repeated, which showed that cracks had propagated in the rock mass. The maximum hydraulic conductivity of the intact rock mass was obtained from different water injection tests and the results were compared with those of the Dongtan Mine in the Yanzhou coalfield, where the floor strata is geologically similar to the Chengjiao Mine’s. The test data verifies that the mine floor’s intact rock mass is very water-resistant. The risk of a water inrush can be judged by the numerical relationship between this resistance and the water pressure of the limestone aquifer. These results can be useful in preventing water inrush through the floor strata in other deep mines.

Zusammenfassung

Zur Untersuchung der hydraulischen Durchlässigkeit der Liegendschichten der Steinkohlengrube von Chengjiao wurden in-situ-Wasserinjektionstests durchgeführt. Die Wasserdruckversuche ergaben belastbare Werte zur Bewertung der Durchlässigkeit der Liegendschichten. Der Initialwasserdruck des intakten Gebirges war während des ersten Tests größer, was einer geringen Durchlässigkeit entspricht. Beim Wiederholungsversuch wurden höhere Wasserdrücke beobachtet was auf eine Rissausbreitung im Gebirge hinweist. Maximaldurchlässigkeiten des intakten Gebirges wurden von unterschiedlichen Wasserdrucktests erhalten und die Ergebnisse mit denen aus der Dongtan-Mine im Yanzhou-Revier, deren Liegendschichten einen mit der Grube von Chengjiao vergleichbaren geologischen Aufbau besitzen, verglichen. Die Testergebisse bestätigen die geringe Wasserdurchlässigkeit des Flözliegenden. Das Risiko eines Wassereinbruchs lässt sich anhand der numerischen Beziehung zwischen dieser Undurchlässigkeit und dem Wasserdruck des Kalksteinaquifers beurteilen. Die erzielten Ergebnisse können helfen, Wassereinbrüche durch die Liegendschichten in anderen Tiefbaugruben zu verhindern.

Resumen

Se realizaron pruebas de inyección de agua in situ para estudiar la conductividad hidráulica de los estratos del piso de la carretera en la mina de carbón Chengjiao. Se obtuvieron datos confiables de presión de agua para evaluar la permeabilidad de la masa rocosa del piso. La presión de agua inicial de la masa rocosa intacta fue mayor en la primera prueba de inyección de agua, lo que indicó que su permeabilidad era baja. Las presiones de agua aumentaron cuando se repitió la prueba, lo que mostró que las grietas se habían propagado en la masa rocosa. La conductividad hidráulica máxima de la masa rocosa intacta se obtuvo de diferentes pruebas de inyección de agua y los resultados se compararon con los de la mina Dongtan en el yacimiento de carbón de Yanzhou, donde los estratos del piso son geológicamente similares a la mina Chengjiao. Los datos de prueba verifican que la masa rocosa intacta del piso de la mina es muy resistente al agua. El riesgo de una entrada de agua puede ser juzgado por la relación numérica entre esta resistencia y la presión del agua del acuífero de piedra caliza. Estos resultados pueden ser útiles para prevenir la entrada de agua a través del estrato de piso en otras minas profundas.

抽象

采用现场注水试验方法研究了城郊煤矿巷道底板地层渗透系数。利用可靠的水压数据估算底板渗透系数。第一次注水时,未破坏底板较大的初始水压表明底板渗透性较弱。当重复试验时,增大的水压表明底板裂隙已经扩展。通过多次注水试验获取未破坏底板最大渗透系数,并将试验结果与具有相似地质条件的兖州东潭矿进行对比。试验证实未破坏底板隔水性能良好。阻水性与灰岩含水层水压之间的数值关系可以判断突水危险。研究对其它大采深矿井底板突水防治也具有借鉴意义。

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

Similar content being viewed by others

References

  • Guo WB, Xu FY (2016) Numerical simulation of overburden and surface movements for Wongawilli strip pillar mining. Int J Min Sci Tech 26(1):71–76

    Article  Google Scholar 

  • Huang Z, Jiang ZQ, Zhu SY, Qian ZW, Cao DT (2014) Characterizing the hydraulic conductivity of rock formations between deep coal and aquifers using injection tests. Int J Rock Mech Min Sci 71:12–18

    Article  Google Scholar 

  • Huang Z, Jiang ZQ, Fu JJ, Cao DT (2015) Experimental measurement on the hydraulic conductivity of deep low-permeability rock. Arab J Geo Sci 8:5389–5390

    Article  Google Scholar 

  • ISBN 978-7-5020-3586-0 State Administration of Work Safety (2009) Provisions on prevention and control of water in coal mines [M]. China Coal Industry Press, Beijing, pp 62–63

    Google Scholar 

  • Jiang ZM, Fu S, Li SG, Hu DK, Feng SR (2014) High pressure permeability test on hydraulic tunnel with steep obliquity faults under high pressure. Chin J Rock Mech Eng 26 (11):2318–2323

    Google Scholar 

  • Jin J, Cao P, Chen Y, Pu CZ, Mao DW, Fan X (2017) Influence of single flaw on the failure process and energy mechanics of rock-like material. Comput Geotechol 86:150–162

    Article  Google Scholar 

  • Kitagawa Y, Kano Y (2016) Changes in permeability of the Nojima fault damage zone inferred from repeated water injection experiments. Earth Planets Sp 68:185–193

    Article  Google Scholar 

  • Li P, Qian H (2013) Global curve-fitting for determining the hydrogeological parameters of leaky confined aquifers by transient flow pumping test. Arab J Geo Sci 6 (8):2745–2753

    Article  Google Scholar 

  • Li P, Qian H, Wu J, Liu H, Lyu X, Zhang H (2014a) Determining the optimal pumping duration of transient pumping tests for estimating hydraulic properties of leaky aquifers using global curve-fitting method: a simulation approach. Environ Earth Sci 71(1):293–299

    Article  Google Scholar 

  • Li P, Qian H, Wu J (2014b) Comparison of three methods of hydrogeological parameter determination in leaky aquifers using transient flow pumping tests. Hydrol Process 28(4):2293–2301

    Article  Google Scholar 

  • Liu RX, Cao DT, Hu DX (2016) A study of the impermeability of the lower coal seam floor rocks at the Yanzhou coalfield based on in-situ test. Hydrogeol Eng Geol 43(1):106–110

    Article  Google Scholar 

  • Pfunt H, Houben G, Himmelsbach T (2016) Numerical modeling of fracking fluid migration through fault zones and fractures in the North German Basin. Hydrogeol J 24:1343–1358

    Article  Google Scholar 

  • Xu JP, Zhang FC, Gui H, Zhang TJ (2012) Characteristics and experimental study of water conduction caused by fault activation due to mining. Int J Min Sci Tech 41(3):415–419

    Google Scholar 

  • Zhang XM, Jiang ZM, Feng SR, Chen SH (2011) Study on the determination of permeability coefficient of fractured rock mass under high pressure test condition. J Hydroelectr Eng 30(1):156–159

    Google Scholar 

  • Zhang WJ, Zhang XW, Zhang D (2015) Experiment of reduction infiltration ability of rock formation under the coal seam floor at Dongtan Coal Mine. Coal Mine Modern 3:82–85

    Google Scholar 

  • Zheng D, Frost JD, Huang RQ, Liu FZ (2015) Failure process and modes of rockfall induced by underground mining: a case study of Kaiyang phosphorite mine rockfalls. Eng Geol 197:145–157

    Article  Google Scholar 

  • Zhu SY, Lu LL, Wu Y, Zhang TT (2017) Comprehensive study on deformation and failure characteristics of the mining-impacted deep double-longwall working faces floor. J Geophys Eng 14(3):641–653

    Article  Google Scholar 

Download references

Acknowledgements

This research was supported by the Fundamental Research Funds for the Central Universities (2015XKMS035) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD). The authors thank the anonymous reviewers for their helpful comments on the manuscript.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Yun Wu Shuyun Zhu.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Zhu, Y.W.S., Zhang, T. Permeability of the Coal Seam Floor Rock Mass in a Deep Mine Based on In-situ Water Injection Tests. Mine Water Environ 37, 724–733 (2018). https://doi.org/10.1007/s10230-018-0524-2

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10230-018-0524-2

Keywords

Navigation