Investigating the effect of earthquakes on open pit mine slopes

Azhari, Amin; Ozbay, U.

doi:10.1016/j.ijrmms.2017.10.005

Cited by 26 publications

(5 citation statements)

References 45 publications

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“…With the development of open-pit mining, the stability of open-pit high slope and inclined shaft has also become one of the key technical problems in mine resources development [11]. For a long time, many scholars have explored the deformation and stability of slopes in increasing depth [12][13][14][15]. The exploration results show that during the mining process, the geological environment conditions change, especially the blasting operations in mining activities, artificial activities, and geological structure changes such as rock faults and stable structural surfaces with more developed fracture joints have a greater impact on the stability of slopes [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Monitoring and Analysis of Dynamic Response for Open-Pit Mine with Inside Inclined Shafts under Train Loading

Wang

Yang³

et al. 2021

Metals

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The stability of open-pit mining is a hot issue in geotechnical engineering. A mining railroad is in operation on the slope where the east exhaust inclined shaft and the east sand injection inclined shaft on the Laohutai Mine are located, and it was necessary to determine whether railroad vibration would have an impact on the safety of the inclined shafts. With this project as the background, the dynamic response of the slope with inside two inclined shafts was conducted under train loading. A three-dimensional numerical model by using PLAXIS 3D was established to analyze the stability of the slope. The results show that the dynamic reaction caused by the full-loaded train is significantly greater than the no-load train. The safety factor of the slope under the dynamic load is 1.201, and the maximum displacement of the slope which occurred in the gravel layer directly beneath the train track is about 5 mm. The acceleration responses of the two inclined shafts are almost consistent. The maximum horizontal and vertical acceleration occur at the epidote weak layer. The acceleration directly below the load increases significantly. Therefore, it can be considered that the slopes are stable under the action of train vibration, and the influence on the two inclined shafts is small and negligible.

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Section: Introductionmentioning

confidence: 99%

Monitoring and Analysis of Dynamic Response for Open-Pit Mine with Inside Inclined Shafts under Train Loading

Wang

Yang³

et al. 2021

Metals

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“…In such deep mining process, the high-stress hard rock experiences various extreme events such as blasting operations, mechanical shock earthquakes, excavation unloading, and other dynamic disturbances around the deep underground rock [9][10][11][12][13][14][15][16], causing the significant change of the stress field and displacement field in the slopes and thus worsening the instability of slopes and landslide [17][18][19][20]. For example, on May 13, 2011, the north side of Shengli open-pit mine in Inner Mongolia, China, experienced a catastrophic landslide, which had a length of about 1.3 km, an area of 0.886 km 2 , and a volume of approximately 85 million m 3 [21]. Note that there also have been four small-and medium-scale landslides reported in this area during the past five years.…”

Section: Introductionmentioning

confidence: 99%

“…e rock mass of the deep concave slope in the open-pit and underground combined mining is usually composed of multilayer soft and hard interlayer structural planes, of which the mechanical properties influence the slope deformation characteristics [19,21,22]. A number of studies have shown that structural planes are the main controlling factor in controlling coal slopes' local instability.…”

Section: Introductionmentioning

confidence: 99%

“…MATLAB was used to compile the Chebyshev II bandpass filter in order to filter the wave and obtain the effective waveform frequency.3.3. Dynamic Response Characteristics of the Slope.In order to study the influence of input wave frequency on slope dynamic response characteristics, the displacement and shear strain nephograms of slope under dynamic loads with different frequencies(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) are shown in Figures 4 and 5.…”

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confidence: 99%

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Dynamic Response Characteristics and Failure Mechanism of Coal Slopes with Weak Intercalated Layers under Blasting Loads

Liu

Song

Chen

et al. 2020

Advances in Civil Engineering

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Rock slopes with weak intercalated layers could experience disturbance from various deep mining activities; however, their dynamic stability has not been thoroughly investigated. In this paper, the dynamic response characteristics and failure mechanism of the coal slopes with weak intercalated layers under blasting loads were studied by means of numerical analysis, shaking table tests, and field tests. The effects of dynamic loads with different frequencies on the dynamic response of the slope were analyzed, and the natural frequency of the slope was also determined. The results show that the dynamic amplification effect of the slope is smaller than that of the homogeneous slope, and weak layers weaken the wave propagation in the rock mass. Both experimental and field investigation results show that the slope’s natural frequency was approximately 35 Hz. The slope deformation decreased with the distance of the blasting source. Cracks appear along the weak interlayer firstly under the action of horizontal vibration; then, longitudinal cracks occur at the slope crest. With the increase of dynamic loads, cracks continue expanding, deepening, and penetrating in the main controlled weak interlayer; then, the sliding body presents tensile shear failure along the sliding surface. This study could provide insights into the understanding of the coal slope instability and failure mechanism; this could benefit the blasting operation of the coal slope in fields.

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“…Pavloudakis et al [24] analyse the effects of the environmental damages caused by the intensive operation of a surface lignite mine and review the relevant regulatory aspects and public involvements, with emphasis on the provisions of the Aarhus Convention. Azharib and Ozbaya [25] investigated 177 different cases of hazards caused by seismic activity in open-pit mines showing the importance of the excess pore pressure as a significant risk factor for earthquake-triggered failures in highly excavated mines with steep slope formations. Park et al [26] researched the role of coal spoil and tailing wastes that may cause environmental problems and associated risks with potential failures of tailing dam constructions, as well as the associated geochemical effects such as acid mine drainage and presence of saline water and heavy metals.…”

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confidence: 99%

A Fuzzy-AHP Methodology for Planning the Risk Management of Natural Hazards in Surface Mining Projects

Spanidis¹,

Roumpos

Pavloudakis

2021

Sustainability

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Surface mining projects are vulnerable to natural hazards (earthquakes, floods, soil instabilities, and epidemic crises) which constitute the primary source of risks which affect the mining operations. In the framework of sustainable planning and development of such projects, the investigation of risk impacts is essential for taking the appropriate preventive measures before disastrous events appear in a mine. This paper proposes a methodology for the risk assessment of natural hazards in surface mining projects using the triangular Fuzzy Analytical Hierarchy Process (FAHP) for the determination of the probability of risk occurrence, combined with the Expected Value (EV) function, the Monte Carlo simulation, and the Program Evaluation Review Technique PERT method for making predictions of cost and time overruns. A case study of a hazardous event with impacts in the operations of a surface mine demonstrates the methodology as a flexible and low-cost tool for mining executives. This tool is useful in the planning stage of pre-disaster management projects in the mineral industry, considering mine sustainability views. The research work also investigates critical technical and economic aspects.

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Investigating the effect of earthquakes on open pit mine slopes

Cited by 26 publications

References 45 publications

Monitoring and Analysis of Dynamic Response for Open-Pit Mine with Inside Inclined Shafts under Train Loading

Monitoring and Analysis of Dynamic Response for Open-Pit Mine with Inside Inclined Shafts under Train Loading

Dynamic Response Characteristics and Failure Mechanism of Coal Slopes with Weak Intercalated Layers under Blasting Loads

A Fuzzy-AHP Methodology for Planning the Risk Management of Natural Hazards in Surface Mining Projects

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