Ground movement resulting from underground backfill mining in a nickel mine (Gansu Province, China)

Ma, Feifei; Zhao, Haijun; Yuan, Rui; Guo, Jie

doi:10.1007/s11069-014-1513-9

Cited by 38 publications

(20 citation statements)

References 26 publications

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“…This will greatly ease the situation of coal production difficulties and extend the mining life of the Beixu Coal Mine. and ecological environment and is conducive to safe production [10][11][12]. This technology opens up a new technical method for coal mining under villages in China [13].…”

Section: Geological and Geotechnical Overviewmentioning

confidence: 96%

“…In the process of mining under villages, the problems of subsidence area governance and the treatment of the relationship between the workers and peasants have caused certain economic pressure and unstable factors to the coal enterprises [7][8][9]. Filling mining technology can effectively control the overlying strata and surface subsidence, can protect the ground structures and ecological environment and is conducive to safe production [10][11][12]. This technology opens up a new technical method for coal mining under villages in China [13].…”

Section: Introductionmentioning

confidence: 99%

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A New Thin Seam Backfill Mining Technology and Its Application

et al. 2017

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Abstract:Backfill mining is an effective way to control ground subsidence and govern gangue. To solve the problem of thin coal seam mining under villages, a new thin seam backfill mining technology was proposed. This paper investigated a reasonable proportion of filling materials by experiments, designed the filling system and introduced key technologies for thin seam working face filling. Finally, an industrial test of thin seam backfill mining technology was carried out in the C1661 working face, Beixu Coal Mine. The results show that the developed filling material meets both the pumping liquidity and strength requirements of the filling body during the early and late stages. The design and equipment selection of the paste filling system were reasonable. By using the key technologies for thin seam working face filling, the time needed for working face filling, the connection and disconnection of the filling pipeline and gob-side entry retaining were all greatly shortened. The labor intensity of the workers was reduced, and the mechanization level of the mine was improved. A fill mining length of 480 m was successfully completed. With effective roof subsidence control, the ground subsidence can be reduced, and good results can be achieved. This study can contribute to the development of backfill mining in thin coal seams.

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Section: Geological and Geotechnical Overviewmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

A New Thin Seam Backfill Mining Technology and Its Application

et al. 2017

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“…Fortunately, Long-term GPS ground movement monitoring network has been built in Jinchuan Mine area since 2001 [26]. Z-12-type GPS receiver and antenna (Ashtech, USA) were employed to receive data from 289 monitoring points.…”

Section: Indirect Monitoringmentioning

confidence: 99%

Deformation Failure Mechanism of Deep Vertical Shaft in Jinchuan Mining Area

Sun

Guo

et al. 2020

Sustainability

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Vertical shafts play an important role in the safe operation of mines. The stability of vertical shafts has always been a difficult problem in mining engineering, especially with the increasing of mining depth. In order to keep the engineering works stable, it is necessary to make the deformation failure mechanism of vertical shafts clear. This paper describes a case study of the deformation and failure mechanisms of the vertical shaft in Jinchuan No. 2 mining area in Gansu Province, China. Long-term deformation trends and characteristics of the vertical shaft are analyzed through ground movement and GPS monitoring of ground fissures. Then, based on previous research experience and a detailed field investigation, the modes, influencing factors, and mechanisms of deformation failure in the vertical shaft are studied. To further investigate the mechanism of shaft deformation failure and damage process under mining, the Universal Discrete Element Code (UDEC) software with Trigon approach is employed to build the numerical model of the vertical shaft. Through displacement, stress, and damage analysis, the time, location, and cause of vertical shaft failure during mining are explicitly illustrated. The results suggest that the upper and lower parts of the fault are activated in different ways. The damage to the vertical shaft is still developing at a very high rate under mining with filling method. All our results throw light on the nature of deformation and failure of vertical shafts, and several suggestions for the engineering of deep vertical shafts are finally put forward, providing a reference for other engineering.

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“…The mine is located in the city of Jinchang in northwest of China. The ore deposit is about 6.5 km long, 10s of meters to 570 m in width, and extends to more than 1000 m in depth [36][37][38]. The strike of the ore body is northwest and dips to the southwest, and the dip angle ranges from 40 • to 70 • .…”

Section: Geologymentioning

confidence: 99%

Monitoring and Analysis of Stress and Deformation Features of Boundary Part of Backfill in Metal Mine

Rong

Zhao³

et al. 2020

Sustainability

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The backfill mining method is widely used in metal mines. A large and thick backfill body has formed in the No.2 zone of Jinchuan Nickel Mine, and its stability is critical for mining safety. In order to study the mechanical behavior of the boundary part of backfill, ground subsidence monitoring, underground filed monitoring of displacement, and stress and numerical simulation were conducted to analyze stress distribution and deformation of backfill. According to underground monitoring, the bed separated displacement has the consistent trend with ground subsidence in the mine area. Based underground stress monitoring, both horizontal and vertical stress of the internal part of backfill is less than the stress boundary part of the backfill. The characteristic of backfill boundary outline is a step-profile. Contact interaction between the surrounding rock and backfill led to complex stress distribution. According to stress monitoring of the boundary points in a numerical model, the multi-peak value of stress development is the major feature of the boundary part of backfill. The multi-peak stress behavior of the boundary part of backfill was influenced by mining depth. The boundary part of backfill deformation influenced the local stability of mining. This article provided a scientific basis for strength design and the support choice of a metal mine by the method of backfill mining.

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Ground movement resulting from underground backfill mining in a nickel mine (Gansu Province, China)

Cited by 38 publications

References 26 publications

A New Thin Seam Backfill Mining Technology and Its Application

A New Thin Seam Backfill Mining Technology and Its Application

Deformation Failure Mechanism of Deep Vertical Shaft in Jinchuan Mining Area

Monitoring and Analysis of Stress and Deformation Features of Boundary Part of Backfill in Metal Mine

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