The rock mass failure induced by deep mining exhibits pronounced spatial heterogeneity and diverse mechanisms,with its microseismic responses serving as effective indicators of regional failure evolution and instabili...The rock mass failure induced by deep mining exhibits pronounced spatial heterogeneity and diverse mechanisms,with its microseismic responses serving as effective indicators of regional failure evolution and instability mechanisms.Focusing on the Level VI stope sublayers in the Jinchuan#2 mining area,this study constructs a 24-parameter index system encompassing time-domain features,frequency-domain features,and multifractal characteristics.Through manifold learning,clustering analysis,and hybrid feature selection,15 key indicators were extracted to construct a classification framework for failure responses.Integrated with focal mechanism inversion and numerical simulation,the failure patterns and corresponding instability mechanisms across different structural zones were further identified.The results reveal that multiscale microseismic characteristics exhibit clear regional similarities.Based on the morphological features of radar plots derived from the 15 indicators,acoustic responses were classified into four typical types,each reflecting distinct local failure mechanisms,stress conditions,and plastic zone evolution.Moreover,considering dominant instability factors and rupture modes,four representative rock mass instability models were proposed for typical failure zones within the stope.These findings provide theoretical guidance and methodological support for hazard prediction,structural optimization,and disturbance control in deep metal mining areas.展开更多
The general transmissivity law of ground vibrations was studied,and a user-friendly methodology for determining the behavior of vibrations generated in any rock mass is proposed.The study was based on a single blast i...The general transmissivity law of ground vibrations was studied,and a user-friendly methodology for determining the behavior of vibrations generated in any rock mass is proposed.The study was based on a single blast in a trench excavation,analyzing the vibration components recorded from two fixed locations.The attenuation law and the main variables according to the legal requirements,frequency and peak particle velocity(PPV),are defined with this novel method,achieving a high confidence level in a simple manner.The proposed approach can also have an important impact in terms of reducing the potential consequences of vibrations for the surrounding construction and achieving the required definition of rock mass.Reducing the cost and time in many projects where blasting techniques are applied is particularly useful for the design of future blasts.展开更多
A simple approach is proposed to study the main factors related to the mining activity’s impact on society,through a corporate social responsibility(CSR)qualitative analysis based on the type of raw materials extract...A simple approach is proposed to study the main factors related to the mining activity’s impact on society,through a corporate social responsibility(CSR)qualitative analysis based on the type of raw materials extracted,either by mine site or firm.A CSR index is defined by 30 environmental and socioeconomic elements and,subsequently,it is weighted by three primary factors;the recycling rate,the transition to green energy,and geographical conditions.The proposed method is adaptable to any change in raw material needs over time and,depending on the analyzed country or region,is applicable to any type of mineral resource.The system can be used to drive engagement with the different stakeholders,add value to a project,and establish a CSR continuous improvement system.展开更多
基金financial support from the Distinguished Youth Funds of the National Natural Science Foundation of China(No.52425403)the Hunan Province Graduate Research Innovation Project of China(No.CX20230168)。
文摘The rock mass failure induced by deep mining exhibits pronounced spatial heterogeneity and diverse mechanisms,with its microseismic responses serving as effective indicators of regional failure evolution and instability mechanisms.Focusing on the Level VI stope sublayers in the Jinchuan#2 mining area,this study constructs a 24-parameter index system encompassing time-domain features,frequency-domain features,and multifractal characteristics.Through manifold learning,clustering analysis,and hybrid feature selection,15 key indicators were extracted to construct a classification framework for failure responses.Integrated with focal mechanism inversion and numerical simulation,the failure patterns and corresponding instability mechanisms across different structural zones were further identified.The results reveal that multiscale microseismic characteristics exhibit clear regional similarities.Based on the morphological features of radar plots derived from the 15 indicators,acoustic responses were classified into four typical types,each reflecting distinct local failure mechanisms,stress conditions,and plastic zone evolution.Moreover,considering dominant instability factors and rupture modes,four representative rock mass instability models were proposed for typical failure zones within the stope.These findings provide theoretical guidance and methodological support for hazard prediction,structural optimization,and disturbance control in deep metal mining areas.
基金Perforaciones Noroeste S.A.in the frame of the University-Company collaboration project FUO-068-17.
文摘The general transmissivity law of ground vibrations was studied,and a user-friendly methodology for determining the behavior of vibrations generated in any rock mass is proposed.The study was based on a single blast in a trench excavation,analyzing the vibration components recorded from two fixed locations.The attenuation law and the main variables according to the legal requirements,frequency and peak particle velocity(PPV),are defined with this novel method,achieving a high confidence level in a simple manner.The proposed approach can also have an important impact in terms of reducing the potential consequences of vibrations for the surrounding construction and achieving the required definition of rock mass.Reducing the cost and time in many projects where blasting techniques are applied is particularly useful for the design of future blasts.
基金funding provided thanks to the CRUE-CSIC agreement with Springer Nature.
文摘A simple approach is proposed to study the main factors related to the mining activity’s impact on society,through a corporate social responsibility(CSR)qualitative analysis based on the type of raw materials extracted,either by mine site or firm.A CSR index is defined by 30 environmental and socioeconomic elements and,subsequently,it is weighted by three primary factors;the recycling rate,the transition to green energy,and geographical conditions.The proposed method is adaptable to any change in raw material needs over time and,depending on the analyzed country or region,is applicable to any type of mineral resource.The system can be used to drive engagement with the different stakeholders,add value to a project,and establish a CSR continuous improvement system.
