Estimation of fracturing mechanisms by the ratio of radiated energy between S and P waves of microseismic events during mining in metal mines

Liu, Jianpo; Si, Ying-tao; Zhang, Changyin; Ren, Wang

doi:10.1007/s11770-020-0856-0

Cited by 12 publications

(6 citation statements)

References 25 publications

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“…The distributions of the energy ratios (𝐸𝑠/𝐸𝑝) that are based on different mine failure case studies have been documented by numerous authors, including Cai et al (1998), Kwiatek and Ben-Zion (2013), Morkel et al (2019), Liu et al (2020), Rebuli and Kohler (2014) and Sweby et al (2006). The 𝐸𝑠/𝐸𝑝 ratio is compared to the moment tensor inversion results, in particular, the isotropic (ISO) and double-couple (DC) components.…”

Section: Introductionmentioning

confidence: 98%

Using legacy 3D seismic data and source parameters of mining‐induced earthquakes to mitigate the risk of rockbursting in Kloof Gold Mine, South Africa

Masethe

Manzi

Durrheim

2023

Geophysical Prospecting

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Rockbursts pose a significant risk in deep gold mines in the Witwatersrand Basin of South Africa as they may damage the excavation, injure workers, and delay production. We analysed the source mechanisms of 75 large mining‐related seismic events (ML 1.5–2.7) that caused damage to stopes in Kloof Gold Mine and used legacy 3D reflection seismic data to delineate the ore body and geological structures that may be correlated with mining‐related seismic events. The 75 seismic events took place at depths of 1600–4200 m below surface. Most events were located close to stopes mining the Ventersdorp Contact Reef ore body. The S‐to‐P‐wave energy ratio (Es/Ep) from the analysed seismic events ranged from 1.1 to 19.9. The source mechanisms of mining‐induced seismic events aid in understanding the dominant modes of failure. Planes of weakness may be the result of mining‐induced stresses or pre‐existing geological structures such as faults and dykes. The Es/Ep ratio, focal mechanism and moment tensor solutions were correlated to the underground mapped and seismically defined geological structures. Approximately 44% of the events showed strong correlation with the known underground mapped and seismically imaged geological structures (faults and dykes), whereas 56% of the events were related to elements of the mining geometry (dip pillars, abutments and remnants). This information enables mining layouts to be modified to minimize the risk of rockbursting.

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Section: Introductionmentioning

confidence: 98%

Using legacy 3D seismic data and source parameters of mining‐induced earthquakes to mitigate the risk of rockbursting in Kloof Gold Mine, South Africa

Masethe

Manzi

Durrheim

2023

Geophysical Prospecting

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“…Previous researches have obtained some achievements on backfill mining technology by developing new-type backfill material and improving mechanized level. However, some critical issues, such as high cost, low stability, and adverse ventilation, still restrict the large-scale application of downward route backfill method 10 , 11 . Thus, the present study focuses on the stability of surrounding rock in downward mining route supported by slab-wall backfill structure.…”

Section: Introductionmentioning

confidence: 99%

Stability assessment of surrounding rock in downward mining route supported by slab-wall backfill structure

Yin,

Yang,

et al. 2024

Sci Rep

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Characteristic of ground pressure in surrounding rock is generally considered as the theoretical basis of parameter optimization for stope structure and technology. To explore the feasibility of efficient method for the second-step downward route backfill stopes in Shanjin gold mine, various numerical simulation methods were used to investigate the effect of slab-wall backfill structure on stability of surrounding rock in downward route mining system. The maximum principal stress, artificial false roof stress, and displacement were analyzed to evaluate the level of ground pressure in different mining areas. These results indicate the optimized structural parameters for backfill stopes, which may also provide a low-cost way to achieve a high safety for downward route mining system.

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“…Consequently, comprehending the stress transfer dynamics in the mining eld is a fundamental prerequisite for ensuring continuous safe mine production and serves as the technical foundation for optimizing mining eld structural parameters and procedures [6]. While the downward approach back ll method is widely employed, its application to smaller stope parameters and higher bottoming back ll strength has received less attention in stope stability studies [7,8]. This paper focuses on the Shanjin gold mine downward approach back ll mining method, utilizing numerical simulations to scrutinize stress distribution and transfer patterns within the downward approach mining eld under various platewall structural back ll processes.…”

Section: Introductionmentioning

confidence: 99%

Stability assessment of surrounding rock in downward mining route supported by slab-wall backfill structure

Yin,

Yang,

et al. 2023

Preprint

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show abstract

Estimation of fracturing mechanisms by the ratio of radiated energy between S and P waves of microseismic events during mining in metal mines

Cited by 12 publications

References 25 publications

Using legacy 3D seismic data and source parameters of mining‐induced earthquakes to mitigate the risk of rockbursting in Kloof Gold Mine, South Africa

Using legacy 3D seismic data and source parameters of mining‐induced earthquakes to mitigate the risk of rockbursting in Kloof Gold Mine, South Africa

Stability assessment of surrounding rock in downward mining route supported by slab-wall backfill structure

Stability assessment of surrounding rock in downward mining route supported by slab-wall backfill structure

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