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Influence of Structural Elements and Stress on Mining-Induced Fault Slip
Abstract This study examines the relationships between the structural elements, stress state and fault slip at the No. 8 mine in the Pingdingshan area, northern China. Based on a geological environment investigation of the field and the structural setting of the mine, two tectonic zones are identified as hosts to numerous fault slip events. The spatial distribution of events is closely linked to horst structures, but different types of horst structures may represent different mechanisms of fault dynamic fault behavior. Almost all of the fault slip events are concentrated in the region with steep orebody dip gradients, and the radius of curvature shows an impressive correlation with the cumulative occurrence of fault slip. Geophysical information of fault surfaces is used for stress reconstruction to estimate the orientation of the principal stresses. The results obtained from this analysis show that the principal stress oriented NNE–NE exerts the primary control in the western region of the field, yet the principal stress oriented NWW–NW strongly influences the middle region of the field. The analysis conducted here may be easily applied to other underground developments in structural zones and may show a positive effect on assessment of fault slip hazard.
Influence of Structural Elements and Stress on Mining-Induced Fault Slip
Abstract This study examines the relationships between the structural elements, stress state and fault slip at the No. 8 mine in the Pingdingshan area, northern China. Based on a geological environment investigation of the field and the structural setting of the mine, two tectonic zones are identified as hosts to numerous fault slip events. The spatial distribution of events is closely linked to horst structures, but different types of horst structures may represent different mechanisms of fault dynamic fault behavior. Almost all of the fault slip events are concentrated in the region with steep orebody dip gradients, and the radius of curvature shows an impressive correlation with the cumulative occurrence of fault slip. Geophysical information of fault surfaces is used for stress reconstruction to estimate the orientation of the principal stresses. The results obtained from this analysis show that the principal stress oriented NNE–NE exerts the primary control in the western region of the field, yet the principal stress oriented NWW–NW strongly influences the middle region of the field. The analysis conducted here may be easily applied to other underground developments in structural zones and may show a positive effect on assessment of fault slip hazard.
Influence of Structural Elements and Stress on Mining-Induced Fault Slip
Lin, Chen (author) / Guo, Deyong (author) / Liang, Yueqiang (author)
2017
Article (Journal)
English
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