Stability evaluation and optimal excavated design of rock slope at Antaibao open pit coal mine, China

He, Manchao; Feng, Jili; Sun, Xiaoming

doi:10.1016/j.ijrmms.2007.05.007

Cited by 48 publications

(23 citation statements)

References 4 publications

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“…Earthquakes or volcanic activity in the vicinity of open-pit slopes (Srikrishnan et al 2013;Zobin et al 2013;Xu et al 2014;Yang et al 2014) create more slope instability and other potential dangers (Bye and Bell 2001;Pradhan and Lee 2009;Pradhan and Youssef 2010;Yang et al 2012;Pourghasemi et al 2013). Such destabilizing events include the large landslides at the limestone open-pit mine in Panzhihua in June 1981 (Wang and Tian 1999), at the Antaibao open-pit coal mine in October 1991 (He et al 2008) and at the Betze-Post open-pit mine in May 2005 (Rose and Hungr 2007), all of which caused serious economic losses and casualties (Yang and Yang 1998). Therefore, it is important for safe mine operation to study the stability of open-pit slopes.…”

Section: Introductionmentioning

confidence: 99%

Deformation characteristics and mechanism of the landslide in West Open-Pit Mine, Fushun, China

Nie

Min

et al. 2014

Arab J Geosci

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The West Open-Pit mine in Fushun, NE China is currently the largest open-pit coal mine in Asia. A serious problem of slope instability has developed and is worsening. Several studies have investigated the northern slope instability, while little attention has been paid to the stability problem on the southern slope which faces northwards into the mine. Recent monitoring data show continuous deformation of the southern slope, which is a serious threat to the safe operation of the mine. In this paper, we study the deformation characteristics and mechanism of the landslide on the southern slope of the West Open-Pit mine. Our results show large deformation of the partial surface of the landslide, deep rock mass sliding, and clear sliding surface dislocation characteristics. The southern slope is a bedding rock slope with a weak interlayer. There are two faults in the study area, and the development of joint fissures promotes the internal mechanism of the landslide. The safety factor of the southern slope has decreased with the deepening of the open-pit, which shows that excavation unloading was a main triggering factor for the landslide. The mining is stripping rock mass from the bottom of the open-pit, cutting the foot of the slope and causing the rock mass to lose support. The downslide force caused by the gravity stress of the slope becomes greater than the shear strength of the weak interlayer, causing the slip body to undergo bedding slide and continuous deformation.

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Section: Introductionmentioning

confidence: 99%

Deformation characteristics and mechanism of the landslide in West Open-Pit Mine, Fushun, China

Nie

Min

et al. 2014

Arab J Geosci

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“…Given that most of road engineering embankments are symmetrical, the FLAC3D [27][28][29][30][31] is used for modeling analysis in half of the embankments, as shown in Figure 2. e total height of the embankment is 8 m, and the slope is 1 : 1.5. e width of the embankment is 25 m, and the width of the upper road is 13 m. e foundation is equal to the height of the slope, which is 10 m, and the slope to the right is about 1 time the width of the embankment, which is 25 m. Table 1 shows the parameters of the embankment modeling according to the actual data provided by the project.…”

Section: Modelingmentioning

confidence: 99%

Effect of Thickness of Gravel Base and Asphalt Pavement on Road Deformation

Yang

2018

Advances in Civil Engineering

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is study uses a test section of a highway, a study object, to explore the effect of thickness of the gravel base and asphalt layer on the vertical deformation of the road surface. e thickness of the asphalt layer and graded gravel base is changed. e nonlinear description equation of the relationship between the thickness (h1) of the asphalt layer and the vertical deformation (d1) is established: d1 � a 4 (1 b h1 4 ). e thickness of the asphalt pavement is then determined to reduce vertical deformation. Numerical calculation shows that the maximum vertical deformation of the foundation is within 8 mm, which is less than the 15 mm maximum vertical deformation of the embankment. is level meets the design requirements.

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“…In the past, the studies are mainly done with the laboratory test and the theoretical analysis, but the laboratory tests need some cost, and the theoretical analysis has its limitation due to some assumption are needed in applying. So we want to find some more methods to study the topic, fortunately, in recent years, rapid advances in computer technology and sustained development have pushed the numerical analysis methods like the fast lagrangian analysis of continua three dimensions (FLAC3D) to the forefront of geotechnical practice [15][16][17][18]. In the present paper, the direct tests of joint are done to study the strength and deformation of joint, which will give some guidance for the real practice and the analytical studies.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation for direct shear test of joint in rock mass

Lin¹,

Cao²,

Yong³

2010

IJIGSP

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Abstract-Joint is among the most important factors in understanding and estimating the mechanical behavior of a rock mass. The difference of the strength, deformation characteristic of joint will lead to different strength and deformation of rock mass. The direct shear test is very popular to test the strength of joint owing to its simplicity. In order to study the three dimensional characteristic of joint, the numerical simulation software FLAC3D is used to build the calculation model of direct shear test under both loads in normal and shear direction. Deformation and mechanical response of the joint are analyzed, showing that, (1) relationship between shear strength and normal stress meets the linear Mohr-Coulomb criterion, the results are similar with that from the laboratory test; (2) the distribution of stress on the joint increases from the shear loading side to the other; and with the increase of normal stress, the distribution of maximum shear stress does not change much. The analysis results can give some guidance for the real practice; (3) the result from the numerical modeling method is close to that from the laboratory test, which confirms the correctness of the numerical method.

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Stability evaluation and optimal excavated design of rock slope at Antaibao open pit coal mine, China

Cited by 48 publications

References 4 publications

Deformation characteristics and mechanism of the landslide in West Open-Pit Mine, Fushun, China

Deformation characteristics and mechanism of the landslide in West Open-Pit Mine, Fushun, China

Effect of Thickness of Gravel Base and Asphalt Pavement on Road Deformation

Numerical simulation for direct shear test of joint in rock mass

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