The Prediction of Northern Slope Deformation and Failure Caused by the Transformation of Open-Pit to Underground Mining in the Yanqianshan Iron Mine

An Lin Shao; Hai Long Feng

doi:10.4028/www.scientific.net/AMM.580-583.364

Paper Titles

Analysis of Platform on Piles Application on Deformation Control of Underground Pipe in Reclamation Areas
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Research on Water Temperature Change of Hot Dry Rock Fracture Storage Layer in Shenyang
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Studies about Creep Characteristic of Silty Clay on Triaxial Drained Creep Test
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Test Study on Effects of Temperature, Sand Mix Ratios and Dry Density on Soil Water Characteristic Curves of Bentonite-Sand Mixtures
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The Prediction of Northern Slope Deformation and Failure Caused by the Transformation of Open-Pit to Underground Mining in the Yanqianshan Iron Mine
p.364

The Study on the Engineering Properties of Squeezed Branch Piles under Combined Load
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Triaxial Test Study on Marine Sediments Sample with Simulated Combustible Ice
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Weak Form Quadrature Element Analysis of Diaphragm Walls
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A Chemo-Elasto-Plastic Coupling Model for Sandstone Considering pH Effect
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 580-583The Prediction of Northern Slope Deformation and...

The Prediction of Northern Slope Deformation and Failure Caused by the Transformation of Open-Pit to Underground Mining in the Yanqianshan Iron Mine

Abstract:

The Yanqianshan iron mine is preparing to transform from an open-pit mine to an underground mine. We adopt the non-pillar sublevel caving approach to exploit the particularly thick steep ore bodies within the range from -183 m to -500 m from top to bottom. According to the features of ore body distribution and the approaches of exploitation, we expect that underground mining will result in the loss of stability on the northern slope of the open pit, causing traction-type landslides. Moreover, along with increasing the depth of the mining operation, the range of slope failure will continue to expand and further affect the safety of drainage features and roads distributed on the north side of the open pit. For this purpose, we select four sections along the trending direction of ore bodies and apply the limit equilibrium method to predict the failure process and characteristics on the northern slope according to the stratified mining process.