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Stress Measurement with an Improved Hollow Inclusion Technique In jinchuan nickel mine

International Journal of minerals,Metallurgy and Materials 2000年第3期14卷 157-160页

作者： Meifeng Cai, Lan Qiao, Bo Yu, Shuanghong Wang (Resources Engineering School, University of Science and Technology Beijing, Beijing 100083) Resources Engineering School University of Science and Technology Beijing Beijing 100083 China

Borehole overcoring stress measurement with an improved hollow inclusion technique was carried out at 10 points on 3 levels in jinchuan nickel mine which is situated in north-west of China. Through the measurement, 3-D in situ stress state at the measuring points and distribution characteristics of the stress field in the mine were obtained. The stress state in jinchuan mine is dominated by the horizontal tectonic stress field. The maximum principal stress is horizontal which is about twice the weight of the overburden and its orientation is approximately vertical to the regional tectonic line. The difference between two horizontal principal stresses is quite large which is an important reason to cause failure of underground excavations.

关键词： stress measurement overcoring technique hollow inclusion cell improvement jinchuan nickel mine

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Feasibility Study on Continuous Mining Method in Deep Position of jinchuan nickel mine, China

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Journal of University of Science and Technology Beijing 2001年第2期8卷 81-85页

作者： Meifeng Cai, Lan Qiao, Changhong Li, Shuanghong Wang (Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China) Univ Sci & Technol Beijing Civil & Environm Engn Sch Beijing 100083 Peoples R China

jinchuan nickel mine is the largest nickel mine in China. Cut-and-fill mining method with high density cementing materials is used in the mine. The original mining design divided the mining operation into two steps. The first step stopped the mining rooms and the second step stopped the pillars. Because the two-step method made big trouble for finally mining pillars and strongly limited the mining speed and production, it was successfully changed to a continuous cut-and-fill method without pillars. However, the mining operation in the mine has been down to 800 m and the mining condition is getting worse and more complicated. Through systematical field investigations and 3-D FEM analysis, it is proved that the mining method without pillars is feasible for mining deeper orebodies in jinchuan nickel mine.

关键词： jinchuan nickel mine deep position continuous mining feasibility study

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Engineering geology,ground surface movement and fissures induced by underground mining in the jinchuan nickel mine

Engineering geology,ground surface movement and fissures ind...

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中国科学院地质与地球物理研究所2004学术年会

作者： X.Li~(a,*),S.J.Wang~a,T.Y.Liu~b,F.S.Ma~a a Engineering Geomechanics Laboratory,Institute of Geology and Geophysics,Chinese Academy of Sciences,P.O.Box 9825, Beijing 100029,PR China b jinchuan Group Ltd.Jinchang,Gansu,PR China

The jinchuan nickel mine is the largest underground mine with cut-and-fill mining in *** 1999,there appeared evident ground surface movement and many ground fissures in jinchuan No.2 *** an introduction to the engineering geology and mechanical properties of the rock mass in the jinchuan mine areas,this paper reveals the features of the measured in situ stresses and puts emphasis on an analysis of the mechanism of surface movement and ground fissures induced by the underground mining with *** is indicated that both the fault structures and the alteration contact zones are well developed as the dominant engineering geological characteristics in the jinchuan mine *** stress redistribution in surrounding rocks resulting from the mining,the low stiffness of the filling body,the existence of the void space and the influence of on-going mining activities is the main reason for the occurrence of surface movement and ground fissures.

关键词： Engineering geology Surface movement Ground fissures Cut-and-fill mining jinchuan nickel mine

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Vertical shaft collapse at the jinchuan nickel mine,Gansu Province,China:analysis of contributing factors and causal mechanisms

Vertical shaft collapse at the Jinchuan Nickel Mine,Gansu Pr...

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中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： Feng-shan Ma Qing-hai Deng Dickson Cunningham Ren-mao Yuan Hai-jun Zhao Institute of Geology and Geophysics Chinese Academy of Sciences College of Geological Science and Engineering Shandong University of Science and Technology College of Resources and Environment Science Chongqing University Department of Earth and Environmental Sciences Eastern Connecticut State University Key Laboratory of Active Tectonics and Volcano China Earthquake Administration Institute of Geology China Earthquake Administration

In mining areas,vertical ventilating shafts are often threatened by ground movements induced by underground *** this paper,damage characteristics related to collapse of the vertical ventilating shaft at the No.14 exploratory line in jinchuan nickel mine,China are documented. The damage mechanism is then analyzed based on comprehensive consideration of geological conditions and distribution of underground *** results indicate that the high dip angle of the ore body and fault/ fissures were responsible for the damage of the shaft when ground movements *** the damaged shaft was repaired in a short time,its stability and safe usage are still threatened by potential future ground movements, because the shaft is located within a subsiding depression induced by underground *** case study indicates that when designing an underground mining operation,it is very important to locate a shaft outside of any area where future mining-induced subsidence may occur.

关键词： Shaft collapse Vertical ventilating shaft Underground mining jinchuan nickel mine China

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jinchuan nickel mine——SECOND STAGE

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China Nonferrous Metals Monthly 1995年第3期 11-11页

Production scale of the second stage ex-pansion for jinchuan nickelmine was formed with the total capitalinvestment of RMB 2.66 billion yuanand five systems of mining,ore dress-ing,smelting,sulfuric acid and auxil-iar... 详细信息

关键词： SECOND STAGE jinchuan nickel mine

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