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Determination of the Critical Span for a Large-Caving above a Mined-out Area


Affiliations
1 College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China
2 College of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, China
3 Xigang Dengta Mining Co Ltd, Liaoning, Liaoyang, 111300, China
 

An analytical model presented here was developed to determine the critical span for a large-caving that developed above the mined out area in Xiaowanggou Iron Mine. The model development is based on field observations measurements, examination of the characteristics of overlying rock masses, research on caving process and application of simple loading conditions in the gravitational field. Key input parameters were determined and utilized to predict the critical span for a large-caving. The difference between the predicted and measured values is less than ±3%. Results from the analytical model and field measurements have demonstrated that the proposed model can be used to predict the timing and crater location of large-caving and it forms the theoretical basis for mitigation of risk associated with a largecaving in a safe and economical manner.

Keywords

Arch Theory, Critical Span, Large Caving, Mined Out Area, Subsidence.
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  • Determination of the Critical Span for a Large-Caving above a Mined-out Area

Abstract Views: 254  |  PDF Views: 104

Authors

Haiying
College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China
Fengyu Ren
College of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, China
Yunfeng Zhao
Xigang Dengta Mining Co Ltd, Liaoning, Liaoyang, 111300, China
Sitong Ren
College of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, China

Abstract


An analytical model presented here was developed to determine the critical span for a large-caving that developed above the mined out area in Xiaowanggou Iron Mine. The model development is based on field observations measurements, examination of the characteristics of overlying rock masses, research on caving process and application of simple loading conditions in the gravitational field. Key input parameters were determined and utilized to predict the critical span for a large-caving. The difference between the predicted and measured values is less than ±3%. Results from the analytical model and field measurements have demonstrated that the proposed model can be used to predict the timing and crater location of large-caving and it forms the theoretical basis for mitigation of risk associated with a largecaving in a safe and economical manner.

Keywords


Arch Theory, Critical Span, Large Caving, Mined Out Area, Subsidence.

References





DOI: https://doi.org/10.18520/cs%2Fv116%2Fi4%2F654-660