Quantitative Energy-Based Evaluation of the Intensity of Mining-Induced Seismic Activity in a Fractured Rock Mass

Sainoki, Atsushi; Mitri, Hani S.; Chinnasane, Damodara; Schwartzkopff, Adam Karl

doi:10.1007/s00603-019-01861-1

Cited by 22 publications

(10 citation statements)

References 45 publications

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“…Based on a large number of engineering practices, different numerical analysis models (Zhang et al, 2017;Zeng et al, 2022), mechanical theoretical models (Ning et al, 2020;Zhu et al, 2020;Yang et al, 2021;Tan et al, 2022) and monitoring methods (Wang et al, 2016;Mondal et al, 2020) have been successively introduced into the prediction and exploration of the height of water-conducting fracture zones. In addition, some researchers have effectively observed the development of water-conducting fracture zones from the perspective of strain energy (Swift, 2013;Qi et al, 2019;Sainoki et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Study on prevention and control mechanism of runoff water hazard in thick coal seam mining in valley terrain

Zhang

Qian²,

Wang³

et al. 2023

Front. Earth Sci.

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During the mining of thick coal seams under the gully slope, the mining-induced fractures are prone to connect with the gully runoff, which may induce potential water hazards and affect underground production. Based on the occurrence characteristics of coal seams and the landform in the gully-developed mining area, the coal seam mining under the slope of Na’er Coal Mine and Baoshan Coal Mine was taken as the engineering background, the seasonal runoff of gullies was considered as the influencing factors of the safe mining, and the spatial relationship between the working face and the gully slope was analyzed when the mining-induced fractures were connected with the gully surface and caused the gully runoff water disaster. The research results show that the occurrence structure of the gully slope has a greater impact on the strata movement of the slope. When the key layer is incomplete, the horizontal sliding and local block overturning of the slope rock strata are strong; when the key layer is complete, the horizontal sliding and local block overturning of the slope rock strata are weakened. According to the safety distance of the working face and the generalized model of safety coal pillar setting, the method of setting the safety coal pillar was used to prevent the connection of slipping cracks of the rock strata at the slope bottom and the gully surface during the slope mining, thus preventing the occurrence of runoff hazards during the thick coal seams mining in the valley terrain. The results can provide a theoretical basis and technical support for the prevention and control of seasonal runoff hazards, as well as a reference for the prevention and control of mining-induced landslides, water conservation mining, and ecological environment protection.

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Section: Introductionmentioning

confidence: 99%

Study on prevention and control mechanism of runoff water hazard in thick coal seam mining in valley terrain

Zhang

Qian²,

Wang³

et al. 2023

Front. Earth Sci.

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“…This is attributed to the methodology adopted such that the isotropic, homogenous mechanical properties are applied to the near‐fault rock mass, thereby being impossible to replicate the complex mechanical behavior and stress state of the rock mass containing densely distributed fractures. Recently, several studies demonstrated, based on a numerical modeling approach with the discrete element method (DEM) that a fracture network in a local shear zone away from active mining areas contributes to the generation of abnormal stress state and intense seismic activity whilst quantifying strain energy accumulated and resultant burst‐prone potential (Sainoki et al., 2019; Sainoki, Tabata, et al., 2017). Such studies provided insight into the influence of densely fractured local region on the heterogeneous characteristic of in‐situ stress state with highly stressed regions, emphasizing the importance of considering a fracture network in simulating pre‐mining stress state and evaluating the risk for severe seismic activity.…”

Section: Introductionmentioning

confidence: 99%

“…For example, at Garson Mine located in Sudbury, Canada, source locations of seismic events with strong ground motions detected in 2012 are predominantly concentrated within a major shear zone obliquely passing across the orebodies (Sainoki & Mitri, 2014c). At the Copper Cliff Mine, Sudbury, Canada, regions with comparatively high cumulative radiated energy correspond to those of geological structures, such as a shear zone and a dyke (Sainoki et al, 2016(Sainoki et al, , 2019. It has been then demonstrated by performing numerical simulations with a discrete element method that a fracture network in such geological structures significantly contributes to the generation of the burst-prone stress condition.…”

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confidence: 99%

Numerical Modeling of Complex Stress State in a Fault Damage Zone and Its Implication on Near‐Fault Seismic Activity

et al. 2021

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“…e releasable strain energy is the driving force for the failure of coal or rock mass structure, and the crushing energy is related to the damage degree of coal or rock mass structure in the plastic zone [25][26][27]. e effects of water contents and incident energy levels on coal dynamic behavior were studied.…”

Section: Introductionmentioning

confidence: 99%

Research on Energy Dissipation Laws of Coal Crushing under the Impact Loads

Zhang

et al. 2021

Shock and Vibration

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Dynamic crushing characteristics of coals are closely related with energy absorption and release of coals under certain strain rate. Hence, it is necessary to investigate energy dissipation laws of coal crushing under the impact loads with different strain rates. Based on the dynamic and static mechanical tests, crushing energy, total absorption energy, total releasable elastic latent energy, and relations between fractal feature of fragments, mean particle diameter and energy during crushing behaviors of outburst coal and nonoutburst coal were investigated. According to research results, crushing energy, total absorption energy, and releasable elastic latent energy of outburst coal and nonoutburst coal are related with strain rate, and they present exponential growths with the increase of the strain rate. However, the energy dissipation rate (ratio of crushing energy and incident energy) was basically constant at about 10%∼20%, that is, energy dissipation rate is a variable unrelated with strain rate. There is a good logarithmic relationship between the dynamic compressive strength of coals and the absorption energy density and elastic latent energy density, and dynamic comprehensive strength of coals has important impacts on energy absorption. The fractal features of coal fragments were obvious under dynamic impacts. The higher fractal dimension of fragment and the smaller mean particle diameter of experimental fragments bring the greater energy needed.

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Quantitative Energy-Based Evaluation of the Intensity of Mining-Induced Seismic Activity in a Fractured Rock Mass

Cited by 22 publications

References 45 publications

Study on prevention and control mechanism of runoff water hazard in thick coal seam mining in valley terrain

Study on prevention and control mechanism of runoff water hazard in thick coal seam mining in valley terrain

Numerical Modeling of Complex Stress State in a Fault Damage Zone and Its Implication on Near‐Fault Seismic Activity

Research on Energy Dissipation Laws of Coal Crushing under the Impact Loads

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