A STUDY OF THE INFLUENCE OF RAINFALL ON SLOPE STABILITY ALONG THE TENDENCY OF COAL MEASURE STRATA

LI Hongru; ZHANG Pan; WANG Shenni; ZHAO Huapeng

doi:10.12090/j.issn.1006-6616.2018.24.06.087

Volume 24 Issue 6

Dec. 2018

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LI Hongru, ZHANG Pan, WANG Shenni, et al., 2018. A STUDY OF THE INFLUENCE OF RAINFALL ON SLOPE STABILITY ALONG THE TENDENCY OF COAL MEASURE STRATA. Journal of Geomechanics, 24 (6): 836-848. DOI: 10.12090/j.issn.1006-6616.2018.24.06.087

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A STUDY OF THE INFLUENCE OF RAINFALL ON SLOPE STABILITY ALONG THE TENDENCY OF COAL MEASURE STRATA

doi: 10.12090/j.issn.1006-6616.2018.24.06.087

LI Hongru^{1, 2
,},
ZHANG Pan^{1, 2},
WANG Shenni^{1, 2},
ZHAO Huapeng^{1, 2}

1.
Faculty of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, Shannxi, China
2.
Loess Soil Mechanics and Engineering Key Laboratory of Shaanxi Province, Xi'an 710048, Shannxi, China

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Received: 2017-07-03
Revised: 2018-08-02
Published: 2018-12-28

Abstract

Abstract

Coal strata are characterized by uneven soft and hard strata, poor interlaminar cementation, rapid weathering, being easy to soften when exposed to water, loss of strength due to structural damage and so on. In particular, the carbonaceous mudstone or shale in the interlayer has the characteristics of low strength, easy activation, volatility and relatively small permeability coefficient, which determines that it has a control effect on the stability of the overall slope. In this paper, the effects of saturated and unsaturated seepage rainfall conditions (rainfall intensity), soil property parameters (saturation permeability coefficient of interlayer) and slope shape and size (slope foot, dip angle and buried depth of interlayer) on the seepage characteristics and stability of the slope are analyzed. The results show that the difference of permeability between soft interlayer and upper and lower rock mass has obvious influence on the slope stability. The shallower the soft interlayer is, the more unstable the slope is; the higher the rainfall intensity, the easier the slope along the soft interlayer landslide. It is not that the slope safety factor decreases greatly with the increase of slope inclination, but that the slope safety factor decreases gradually with the increase of interlayer inclination, and the slope is more prone to landslide along the weak interlayer. These findings are significance reference for the design and control of coal measure stratum slope.
- coal measure strata,
- soft interlayer,
- slope,
- rainfall,
- safety factor

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References

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A STUDY OF THE INFLUENCE OF RAINFALL ON SLOPE STABILITY ALONG THE TENDENCY OF COAL MEASURE STRATA

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A STUDY OF THE INFLUENCE OF RAINFALL ON SLOPE STABILITY ALONG THE TENDENCY OF COAL MEASURE STRATA

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