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Thermal recovery process of a backfilled open-pit in permafrost area at the Gulian strip coal mine in Northeast China

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Journal of Mountain Science 2017年第11期14卷 2212-2229页

作者： GAO Shu-hui HE Rui-xia JIN Hui-jun HUANG Ya-dong ZHANG Jian-ming LUO Dong-liang State Key Laboratory of Frozen Soils Engineering Northwest Institute of Eco-environment and Resources Chinese Academy of Sciences University of Chinese Academy of Sciences School of Civil Engineering Harbin Institute of Technology

Timely and proper backfilling of open-pits in strip coal-mines has been an effective measurement for the recovery of the hydrothermal regimes and ecological environment in permafrost regions. In this study, numerical simulations and statistical regressions were applied for analyzing the recovery processes of the backfill and its major influencing factors for the thermal equilibrium in recently backfilled open pits at the Gulian strip coalmine in Mo'he, Northeast China. Results show that the thermal recovery time of backfilled areas is positively correlated to the backfill depth(BD) of the soils, the backfilled soil temperature(BST), and the mean annual ground surface temperature(MAGST); meanwhile, climate warming can impact on thermal regimes of the backfill area. The impact of climate warming on ground temperature of the backfill will show up significantly in about 50 years afterbackfilling(BD at 10.0 and 20.0 m, BST at 20.0°C) under the climate warming scenario(CWS) of 0.025°C·year ^(-1). Grey-relation analyses show that the sensitivity of the backfill recovery time declines in the order of the BD, BST and MAGST. On the basis of the abovementioned studies, the layer-by-layer backfilling in cold seasons is advised for more effective and more rapid recovery of thermal regimes of the backfilled open-pits in cold regions.

关键词： Coal-mine open-pit backfill Numericalsimulation Thermal recovery process Sensitivityanalysis Gulian strip coal mine

Easy proft maximization method for open-pit mining

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Journal of Rock Mechanics and Geotechnical Engineering 2013年第5期5卷 350-353页

作者： C.Dinis da Gama IST – Technical University of Lisbon

A methodology applicable at any phase of a surface mining project for evaluating its current technical and economic feasibility is *** requires the typically available quantitative data on the ore-body,with its three-dimensional block model developed upon accurate *** it allows estimations of exploitable reserves in function of various cut-off grades,such as the average grade of mineable ore,the tonnages of ore and waste rock,stripping ratios and proft estimates for different production *** cost evaluations of essential mine operations are available(such as ore mining,waste removal,ore concentration,transportation,indirect project costs and expected concentrate selling prices),the methodology will provide clear indications on the economic feasibility of mining,including the best available options at any *** expressions are developed on the basis of a proft mathematical function and an application example is presented with data available from an existing iron ore deposit.

关键词： open-pit Proft maximization Ore grade Stripping ratio Economic feasibility

The Influence of Earthquakes on open-pit Slope Stability

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International Journal of Geosciences 2012年第4期3卷 799-808页

作者： Sergei Vadimovich Tsirel Boris Yurievich Zuev Anton Anatolevich Pavlovich State Mining University

Estimation of stability of natural slopes, embankments, dams and open-pit slopes during earthquakes are complex and non-linear problems, therefore physical modeling is used for decision of it. As a result of physical modeling the pattern of seismic vibrations impact based on the movement process of probable collapse prism delineated by the most stressed plane of sliding has been established. Particular recommendations on the basis of safety factors selection in seismoactive zones are given.

关键词： Earthquakes open-pit Slope Stability Safety Factor Pseudostatic Approach

GPS monitoring and analysis of ground movement and deformation induced by transition from open-pit to underground mining

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Journal of Rock Mechanics and Geotechnical Engineering 2012年第1期4卷 82-87页

作者： Fengshan Ma Haijun Zhao Yamin Zhang Jie Guo Aihua Wei Zhiquan Wu Yonglong Zhang Key Laboratory of Engineering Geomechanics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China 2Longshou Mine Jinchuan Group Co.Ltd.Jinchang737100China

To trace the potential hazards of open-pit slope in Longshou mine,global positioning system（GPS） is applied to monitoring ground movement and deformation induced by transition from open-pit to underground *** long-term monitoring from 2003 to 2008,huge amounts of data were *** results show that large-scale ground movement and deformation have occurred in mining area,and the movement area is *** displacement boundary of settlement trough is 2.0 km long along the exploratory line,and 1.5 km long along the strike of ore *** monitoring results basically agree with the practical deformation state of open-pit *** is indicated that the long-term GPS monitoring is an effective way to understand the mechanism of ground movement and deformation in mine area. 更多

关键词： open-pit ground movement long-term GPS monitoring deformation analysis

Study on the Law of the Movement and Damage to Slope with the Combination of Underground Mining and open-pit Mining

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Engineering（科研） 2010年第3期2卷 201-204页

作者： Gaofeng Ren Xingkui Fang 不详

Under circumstances in which both underground mining and open-pit mining are employed, the mining effects of two approaches will be superposed and the mining slope will receive several induced stress fields, which makes the sliding mechanism and deformation law of slope rock mass more complicated. This paper, targeting at the east slope of Antaibao Mine with the joint employment of underground mining and open-pit mining, aims to study the moving law of the slope rock mass and the damage mechanism to the overburden of the goaf by numerical simulation. It is supposed that models of possible damage to the slope could be explored for guidance to safety-production of the mine.

关键词： Combination of Underground and open-pit Mining Mining Damage Deformation Mechanism Numerical Simulation

Easy profit maximization method for open-pit mining

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Easy profit maximization method for open-pit mining

Approach to monitoring, data processing and regularity on landslip in open-pits

第13届全国岩石动力学学术会议

作者： C.Dinis da Gama IST-Technical University of Lisbon Avenida Rovisco Pais 11049-001 LisboaPortugal

A methodology applicable at any phase of a surface mining project for evaluating its current technical and economic feasibility is presented. It requires the typically available quantitative data on the ore-body,with its three-dimensional block model developed upon accurate *** it allows estimations of exploitable reserves in function of various cut-off grades,such as the average grade of mineable ore,the tonnages of ore and waste rock,stripping ratios and profit estimates for different production levels. If cost evaluations of essential mine operations are available(such as ore mining,waste removal,ore concentration,transportation,indirect project costs and expected concentrate selling prices),the methodology will provide clear indications on the economic feasibility of mining,including the best available options at any *** expressions are developed on the basis of a profit mathematical function and an application example is presented with data available from an existing iron ore deposit.

关键词： open-pit Profit maximization Ore grade Stripping ratio Economic feasibility

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中国有色金属学会会刊：英文版 2005年第S1期15卷 132-135页

作者： MA Zhen-li, LI Zheng-zhong, XU Xin-jun (Liaoning Technical University, Fuxin 123000, China)

A new method of landslip monitoring in open-pit is presented, in which the monitoring data processing and a variety of deformation curvilinear drawings are carried out by microcomputer system, based on the practice in... 详细信息

关键词： open-pit landslip observation line monitoring data processing landslip prediction