Research on Stability of an Open-Pit Mine Dump with Fiber Optic Monitoring

Tao, Zhigang; Zhu, Chun; Wang, Yong; Wang, Jiamin; He, Manchao; Zhang, Bo

doi:10.1155/2018/9631706

Cited by 22 publications

(14 citation statements)

References 31 publications

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“…As the presented research indicate and, among others, research by Rajak et al [57], the addition of fly ash increases the shear strength of natural soils. They stated that the factor of safety of a 37° slope, obtained from calculations in the FLAC/Slope program, increased with the increase in Numerous publications (among others: [22,[51][52][53][54][55][56]) indicate that the problem of slope stability in industrial waste landfills is an important engineering issue. The results of tests on shear strength parameters of materials stored there are often carried out either at low values of their moisture content or at optimum moisture content and indicate that these materials usually have high values of shear strength parameters, although the height of the slopes or their too-steep inclination are the reason why they are destroyed (a landslide occurs).…”

Section: Results Of Stability Calculationsmentioning

confidence: 99%

Shear Strength of Industrial Wastes and Their Mixtures and Stability of Embankments Made of These Materials

Gruchot¹,

Zydroń²

2019

Applied Sciences

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The paper presents the results of research on the influence of compaction on the shear strength of fly ash, unburnt and burnt coal wastes, and a composite (a mixture of unburnt coal waste and 30% of fly ash). The tests were carried out in a triaxial compression apparatus on samples with a diameter and height of 10 and 20 cm, respectively. In order to verify usability of the tested waste materials for earthworks, stability calculations of the road embankment made of these materials were carried out. It was shown that the tested materials were characterized by high values of shear strength parameters, which significantly depended on compaction. The most favorable values of the angle of internal friction and cohesion were obtained for the burnt coal waste, slightly lower for the composite, and the lowest for the fly ash. Stability calculations for the road embankment model showed that the slope inclination and the load on the embankment have a significant influence on the factor of safety. It was also shown that a decrease in cohesion causes significant decrease in the factor of safety. The tests and the stability calculations showed that the tested waste materials are useful for earth construction purposes.

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Section: Results Of Stability Calculationsmentioning

confidence: 99%

Shear Strength of Industrial Wastes and Their Mixtures and Stability of Embankments Made of These Materials

Gruchot¹,

Zydroń²

2019

Applied Sciences

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“…Plastic reinforced soil embankments are widely used in engineering practice. Although scientific and technological researchers have carried out certain research work on the seismic effects of reinforced soil slopes, the seismic effects of plastic geogrid-reinforced embankments have rarely been investigated [20][21][22][23][24][25]. The current seismic design of highways nor does the code evaluate the seismic performance of plastic-reinforced embankments.…”

Section: Introductionmentioning

confidence: 99%

Model Test Study on Dynamic Response of Expressway Plastic-Reinforced Earth Embankment under Earthquake

Han

et al. 2021

Geofluids

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Aiming at the seismic response of plastic geogrid-reinforced embankments, with Zhounan Expressway as the research engineering background, a self-designed seismic-rainfall coupled slope model test system was designed and used to produce 1 : 20 scale plastic geogrid-reinforced embankments. Moreover, the physical model of the unreinforced embankment under Hanshin wave, Wenchuan wave, Tianjin wave, etc. was also studied to carry out comparative analysis on seismic response and dynamic response on test model. The dynamic characteristics and dynamic response of the embankment model were tested from low to high seismic intensity; the changes of the embankment’s natural frequency, damping ratio, acceleration at the measuring point, and dynamic earth pressure were analyzed; and the main influencing factors and damage to the embankment seismic response feature were discussed herein. The test results showed that the initial natural frequency of the reinforced embankment was 42.4% higher than that of the unreinforced embankment, and its initial damping ratio reduced by 19.4%. The attenuation effect of the natural frequency and damping ratio of the reinforced embankment with the loading history was significantly lower than that of the unreinforced embankment. Embankment reinforcement exhibited a very good inhibitory effect on the PGA amplification effect of the embankment, and the inhibitory effect on the interior of the slope was more significant than that on the slope. Moreover, the type of seismic wave, the amplitude of the seismic wave, and the frequency of the seismic wave significantly influenced the PGA amplification effect of the embankment. The peak dynamic soil pressure of the unreinforced embankment at the same location was significantly greater than that of the reinforced embankment. The two embankment models showed significantly different antivibration damage performance. After the peak acceleration of 2 m s-2 was loaded, no cracks were seen on the surface of the embankment model. When the peak acceleration of 3 m s-2 was loaded, on the slopes of the two embankment models, smaller cracks were observed in the middle and upper parts of the face. When the peak acceleration of 4 m s-2 was loaded, the failure of the unreinforced embankment model was obvious. Large cracks on the top of the slope could reach 16 mm in width, and 27 mm settlement appeared at the top, and the slope was convex. The reinforced embankment model was only on the slope shoulder. Moreover, there were fine cracks on the top, and the slope top settlement was less than 5 mm. The research results provide theoretical support for preventing and controlling the road embankment vibration diseases and improving highway durability design.

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“…Wang and Luan built a fiber mesh structure on mine roof and conducted BOTDR strain measurement [10]. Zhigang et al conducted an experimental study using fiber optic sensing on the monitoring of deformation in the shallow layers of waste rock from the mining process in the Chinese Nanfen open pit iron mine [11]. Arzu et al built up a laboratory experiment set-up containing an optical fiber system to simulate landslide phenomenon and to record movements [12].…”

Section: Introductionmentioning

confidence: 99%

Monitoring of Strain and Temperature in an Open Pit Using Brillouin Distributed Optical Fiber Sensors

Lanciano

Salvini

2020

Sensors

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Marble quarries are quite dangerous environments in which rock falls may occur. As many workers operate in these sites, it is necessary to deal with the matter of safety at work, checking and monitoring the stability conditions of the rock mass. In this paper, some results of an innovative analysis method are shown. It is based on the combination of Distributed Optical Fiber Sensors (DOFS), digital photogrammetry through Unmanned Aerial Vehicle (UAV), topographic, and geotechnical monitoring systems. Although DOFS are currently widely used for studying infrastructures, buildings and landslides, their use in rock marble quarries represents an element of peculiarity. The complex morphologies and the intense temperature range that characterize this environment make this application original. The selected test site is the Lorano open pit which is located in the Apuan Alps (Italy); here, a monitoring system consisting of extensometers, crackmeters, clinometers and a Robotic Total Station has been operating since 2012. From DOFS measurements, strain and temperature values were obtained and validated with displacement data from topographic and geotechnical instruments. These results may provide useful fundamental indications about the rock mass stability for the safety at work and the long-term planning of mining activities.

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Research on Stability of an Open-Pit Mine Dump with Fiber Optic Monitoring

Cited by 22 publications

References 31 publications

Shear Strength of Industrial Wastes and Their Mixtures and Stability of Embankments Made of These Materials

Shear Strength of Industrial Wastes and Their Mixtures and Stability of Embankments Made of These Materials

Model Test Study on Dynamic Response of Expressway Plastic-Reinforced Earth Embankment under Earthquake

Monitoring of Strain and Temperature in an Open Pit Using Brillouin Distributed Optical Fiber Sensors

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