Investigation of failure prediction of open-pit coal mine landslides containing complex geological structures using the inverse velocity method

Du, Han; Song, Danqing

doi:10.1007/s11069-021-05159-w

Cited by 18 publications

(9 citation statements)

References 49 publications

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“…The mechanical parameters of the surrounding rock samples were measured in accordance with "GB/T 23561-2009 Method for the Determination of Physical and Mechanical Properties of Coal and Rock." The uniaxial compressive strength test, tensile strength test, and variable shear test were carried out in rock mechanics experiments (Du et al, 2020;Du and Song 2022). The rock specimens and test process are illustrated in Figure 3.…”

Section: Mechanical Parameters Test Of the Surrounding Rockmentioning

confidence: 99%

Law of strata pressure behavior of surrounding rock in nearby goaf roadway for extra-thick coal seams of Datong mine area

Lian

et al. 2023

Front. Earth Sci.

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The nearby goaf road in the extra-thick coal seam of the Datong mining area exhibits intense strata pressure behavior, which affects the working face mining. Herein, we study the laws of the strata pressure behavior of this road in detail using various methods, including laboratory tests, theoretical analyses, numerical simulation, and field monitoring. Considering the mine pressure characteristics of the nearby goaf road, namely, roof cracking, two-side deformation, and floor heaving, the mechanical tests and theoretical failure analyses of the surrounding rock in the mining-induced non-uniform stress field were carried out. The circular-oval-butterfly failure trend of the surrounding rock in the nearby goaf road under the influence of mining was obtained. The steady failure evolution lateral pressure coefficient (λ=0.5∼1.8) and butterfly mutation lateral pressure coefficient (λ<0.35 or λ>2.1) of the surrounding rock in the nearby goaf road were analyzed. We performed numerical simulation to study the stress field and the plastic zone shape-size characteristics of the surrounding rock during excavation and mining (with or without the top extraction road), and the theoretical law of the mine pressure was obtained for the Tong Xin coal mine. Finally, field monitoring indicates that the mine pressure behavior of the nearby goaf road exhibits spatial differences, namely, the difference between the stresses of the two sides and roof, and the stress characteristics of the deep and shallow surrounding rock. The findings of this study on the mine pressure behavior in the nearby goaf road have great practical significance for targeted measures to control the surrounding rock stability.

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Section: Mechanical Parameters Test Of the Surrounding Rockmentioning

confidence: 99%

Law of strata pressure behavior of surrounding rock in nearby goaf roadway for extra-thick coal seams of Datong mine area

Lian

et al. 2023

Front. Earth Sci.

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“…Often, multiple sliding events form a composite landslide, which can be difficult to control. More than 80 landslides occurred in the Fuxin Haizhou open-pit coal mine landslide (He et al, 2011), and the comprehensive geological environment management of the mine forms a systematic and intricate project, with many of the topics confronted at the mine being problems worldwide (Du and Song, 2022). The abovementioned studies have illustrated the complexity and difficulty of open-pit coal mine landslides, but the deformation and failure processes remain in empirical judgments and simple mechanical calculations.…”

Section: Introductionmentioning

confidence: 99%

Landslide mechanism and stability of an open-pit slope: The Manglai open-pit coal mine

Chen

Shu²,

Liu³

et al. 2023

Front. Earth Sci.

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A clear understanding of landslide mechanisms and stability analyses is of great significance for landslide monitoring, prediction, and control. A large-scale end wall landslide occurred and its area reached 47,752 m2 on August 7–20, 2020, in the Manglai open-pit coal mine, China. In this paper, the engineering geological survey, mechanical test, large-deformation finite element numerical method, limit equilibrium method and analytical formula are used to analyze how the groundwater level rise caused this end wall failure and landslide. The engineering geological conditions, hydrogeological conditions, landslide activity signs and physical and mechanical parameter calibration of the sliding mass are investigated in detail and tested. Three-dimensional and two-dimensional numerical models of slopes are established, and an analytical formula calculation method to calculate the factor of safety (FoS) is proposed when sliding cracks are located on the top and toe of a slope. The results indicate that the fault fracture zone, soft strata, continuous heavy rainfall, and groundwater were the main contributors to this landslide. The three-dimensional numerical calculation results are consistent with the deformation and failure process of the slope observed in the field, which shows a retrogressive progressive failure mode. The calculation results of SLOPE/W and the analytical formula are consistent; i.e., when the groundwater level rises to +950, the stability of the end wall reaches the critical stability state. With the passage of time, the creep of the sliding surface accelerates until the entire end wall landslide.

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“…In China, safety monitoring technology of tailings ponds is relatively simple, and remote management is difficult. Landslide monitoring and assessment are indispensable parts of the tailings dam failure warning system [8], including the study of tailings pond failure and the identification of the deformation zone [9]. In tailings pond monitoring systems, the combination of landslide monitoring with general packet radio service (GPRS), Internet +, satellite remote sensing, and other advanced technologies can improve the dynamic monitoring ability and disaster prevention ability of tailings ponds.…”

Section: Introductionmentioning

confidence: 99%

Application of Space–Sky–Earth Integration Technology with UAVs in Risk Identification of Tailings Ponds

Zhang

Wang

et al. 2023

Drones

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Unmanned aerial vehicle (UAV) tilt photography technology has gradually become a new technical means of disaster risk identification. This technology combines UAVs, satellite remote sensing, and ground online monitoring systems to establish an integrated space–sky–Earth system that can be used for tailings pond risk identification. With the use of this system for visual interpretation, water body identification, and monitoring data analysis, multiple types of monitoring parameters of a typical tailings pond in China, such as the seepage line and surface deformation, were obtained. Moreover, intelligent fusion analysis was performed of multisource data to outline the problems affecting tailings safety in the process of elevation expansion and irregular ore discharge of the tailings pond. Warning values of different levels were obtained to assess the overall safety condition of the tailings pond, and the proposed technology was verified. The research results could provide a new basis for accurate evaluation of the running state of tailings ponds and offer an effective remote monitoring means for tailings pond enterprises and supervisory departments.

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Investigation of failure prediction of open-pit coal mine landslides containing complex geological structures using the inverse velocity method

Cited by 18 publications

References 49 publications

Law of strata pressure behavior of surrounding rock in nearby goaf roadway for extra-thick coal seams of Datong mine area

Law of strata pressure behavior of surrounding rock in nearby goaf roadway for extra-thick coal seams of Datong mine area

Landslide mechanism and stability of an open-pit slope: The Manglai open-pit coal mine

Application of Space–Sky–Earth Integration Technology with UAVs in Risk Identification of Tailings Ponds

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