Peng, C. (University of Science and Technology Beijing) | Guo, Q. S. (University of Science and Technology Beijing) | Zhang, Z. C. (University of Science and Technology Beijing) | Zhao, L. (University of Science and Technology Beijing) | Yan, Z. X. (University of Science and Technology Beijing)
ABSTRACT: With the increase of the slope height in open-pit mines, the contradiction between the mining safety and stripping quantity becomes progressively serious. According to the analysis and calculation, the original slope angle in Gaocun Iron mine is conservative. After engineering geological investigation and rock mechanical tests, three optimization schemes were proposed. FLAC numerical simulation software was used to analyze the slope stability by several indexes such as displacement and plastic zone. In addition, the safety factors were obtained according to the limit equilibrium method by Geo-slope software. Eventually, the final slope angle of the mine was determined. It showed that the optimized slope angle is improved by 3° compared with that of the former design on the whole, and the slope stability well meets the requirement of production. 1 INTRODUCTION There are a growing number of metal mines carrying on deep mining in our country, and the design of open pit slopes faces a dilemma in that situation: When the slope angle is too big, the steep slope will cause instability and failure, which is not conducive to the normal production of the mine; In contrast, the small angle will increase the stripped amount and the production costs significantly. To solve this problem, slope angle must be optimized on the premise of mining safety (Heok & Bray 1981, Duncan & Christopher 2005). Gaocun pit of Nanshan Mining Co., Ltd., is a large open pit mine, whose ore production has reached 7 million tons per year with the total mining and stripping of 18 million tons. After entering the second phase of open pit mining, the north-south length of the stope expands from 780 m to 1500 m, and the east-west width expends from 575 m to 820 m. The highest level of open pit mining is up to +90 m and the bottom elevation is down to-186m. Under the conditions of high and steep slope mining, with mining depth increases, the contradiction between security and economic production is gradually highlighted. Therefore, slope design must be optimized to ensure the production safety and increase economic efficiency.
, reservoir simulation, slope angle, (16more...)
OnePetro
ISRM
ISRM-YSS-2014-076
3rd ISRM Young Scholars Symposium on Rock Mechanics
November, 2014
OnePetro PDF
- Country:
- Asia>China (0.19)
- Genre:
- Research Report (0.34)
- Geology:
- Geology (1.00)
- Industry:
- Materials> (1.00)
- SPE Disciplines:
- >Information Management and Systems (0.51)
- Reservoir Description and Dynamics
- Reservoir Characterization (0.49)
- Reservoir Simulation (0.37)
- Technology:
- Information Technology
- Mathematics of Computing (0.37)
- (0.35)
- Information Technology
Duplicate Docs Excel Report
Title | ||
---|---|---|
None found |
Similar DocsExcel Report more
Title | Similarity | Source | |
---|---|---|---|
Analysis of the Constitutive Model of Gaomiaozi Bentonite Based on the Experiments About Elastic-Plastic Mechanical Feature | 1.000 | OnePetro | |
Study on the Failure Omen of Cemented Filling Body-Features of the Response Ratio | 1.000 | OnePetro | |
Experimental Research on Damage Characterization of Porous Rock-Like Composite Material Under External Loadings | 1.000 | OnePetro | |
Research on the Variation Rules of Stress in Deep Exploitation of Hard Rock Metal Mines Based on Dynamic Mine Pressure Monitoring | 1.000 | OnePetro | |
Comprehensive Application of Digital Borehole Camera in the Geological Survey of Coral Reefs | 1.000 | OnePetro | |
GIS Method Based Risk Evaluation for Landslide Hazard in Mian County, Shaanxi Province | 1.000 | OnePetro | |
The Failure Law and Support Technique for Fully-Mechanized Top-Coal Caving Working Face in Extra-Thick Coal Seams in Deep Coal Mines | 1.000 | OnePetro | |
Stability Analysis and Reinforcement on Three-Dimensional Slope Based on Long-Term Strength of Rock Mass | 1.000 | OnePetro | |
Experiment Study on Bearing Capability of Bolt Arched Pallet | 1.000 | OnePetro | |
Derive Grouting Technology in Rock Micro Fissure | 1.000 | OnePetro | |
The Deformation Mechanism of Soft Coal Roadway Under Mining Activity Influence and Its Support Technology | 1.000 | OnePetro | |
Coal-Rock Mass Dynamic Fracturing Characteristics and Deep Critical Discrete Range in Fault Zones | 1.000 | OnePetro | |
Research on Open-Pit Mine Blasting Load Equivalent Way | 1.000 | OnePetro | |
Rock Burst Prediction for Deep-Buried Tunnels at Jinping II Hydropower Station Using Microseismic Monitoring | 1.000 | OnePetro | |
Numerical Simulation of Rock Burst Danger of Longwall Mining Face Located in the Footwall of Skew Fault | 1.000 | OnePetro | |
Technology for Reducing Boulder Yield of Blasting in Fracture Developed Rock of an Open-Pit Mine | 1.000 | OnePetro | |
Numerical Simulation of Surface Blasting in Influence of Stability of Underground Chambers | 1.000 | OnePetro | |
Characteristics of Stress Field of the Erdos Basin and Its Effects on the Deep Mining | 1.000 | OnePetro | |
Numerical Tests on Failure Process of Rock Slopes With a Weak Stratum | 1.000 | OnePetro | |
Impact of Supporting Pressure at Excavation Face on Surface Deformation in Xi'an Metro Shield Construction | 1.000 | OnePetro | |
Experimental Study on the Whole Process of Excavation Deformation and Failure Phenomena of Slope Rock Mass Under the Condition of High Pressure | 1.000 | OnePetro | |
The Analysis of Slope Stability and Optimized Slope Angle for the Open-Pit Mining of a Porphyry Copper Mine | 1.000 | OnePetro | |
Time Effect of Stress and Deformation for Surrounding Rocks in Deep-Buried Tunnels During Unloading | 1.000 | OnePetro | |
Deformation and Failure Characteristics of High and Steep Slope and the Impact of Underground Mining | 1.000 | OnePetro | |
The Analysis of Effects on Shear Strength Characteristics of Loess by Moisture Content Changes and Freeze-Thaw Circle | 1.000 | OnePetro | |
A Hydro-Mechanical Coupled Algorithm for Unsaturated Soil in FLAC3D | 1.000 | OnePetro | |
Study on Mechanical Property and Temperature Field of Frozen Wall in Cretaceous Strata | 1.000 | OnePetro | |
The Physical Model Experimental Study on the Construction of Bedded Salt Rock Energy Underground Storage | 1.000 | OnePetro | |
Anisotropic Numerical Analysis on Failure Modes of Dip Layered Rock Slopes and Engineering Application | 1.000 | OnePetro | |
The 3D Numerical Study on Growth and Coalescence of Pre-Existing Flaws in Rock-Like Materials Subjected to Compressive Loads | 1.000 | OnePetro | |
Tensile Stress Mobilization Along a Rock Bolt Under Shear Load | 1.000 | OnePetro |