Wang J.,China University of Geosciences |
Huang X.,China University of Geosciences |
Hu K.,China University of Geosciences |
Cui Z.-Q.,Yunnan Phosphate Chemical Group Co. |
Li X.,China Mining Association
Resources Policy | Year: 2017
The corporate-community relations have always been an important influencing factor for the development of mining enterprises. In recent years, residents in the mining areas have been paying increased attention to their rights in the mining process, but the failure to properly handle corporate-community relations has resulted in conflict between mining enterprises and local communities. In severe situations, this may even trigger mass disturbances that cause disorders in their normal operations. Considering these potential circumstances, some Chinese mining enterprises started to emphasize corporate social responsibility (CSR), especially the construction of a sound corporate-community relationship, rather than simply making superficial efforts. As a model in such endeavors, the paper takes Kunyang Phosphate of Yunnan Phosphate Chemical Group as a case study; firstly, the development of relations between Kunyang Phosphate and the local community (Hanying Village) is divided into different periods, and each stage is analyzed from the aspect of corporate social responsibility performance of the mine. In addition, this paper makes a summary of “Hanying model”, and analyzes the mine's strategy of community engagement through its practice. © 2017 Elsevier Ltd
Li Y.-J.,Yunnan Phosphate Chemical Group Co.
Advanced Materials Research | Year: 2014
With the largest open-air phosphate mining company-Yunnan Phosphate Chemical Group Co., LTD (YPCG) as engineering background, phosphate rock mountains belonged to YPCG are all located in the surrounding plateau Dianchi Lake with great ecological pressure on the environment. According to ecological fragile district in the mining area, to carry out rehabilitation and reconstruction for ecosystem function is the priority requirement for enterprise development. With the enterprise's subordinates Kunyang, Jinning, Jianshan and Haikou four phosphate rock mountains as actual study, environmental protection is the basic point in the green mine construction. Based on development and utilization of phosphate resources, for instance YPCG mining in open-air phosphate rock mountain and land reclamation, our group focuses on phosphate rock land reclamation, ecological restoration and other key technologies. Besides, these key ecological restoration technologies would be integrated and demonstrated in YPCG green mine construction process. Related research could provide technical or theoretical guidance and demonstration projects for the green mining construction of phosphate industry in China, which contributes important practical and instructive significance for promoting green mine construction. © (2014) Trans Tech Publications, Switzerland.
Li Y.-J.,Yunnan Phosphate Chemical Group Co. |
Hu S.,Kunming University
Applied Mechanics and Materials | Year: 2014
On basis of the geology mining condition of the deep ore bodies of north mining area of Two-hang hau of Jingning mine of Yunnan phosphate group Co. Ltd, the strata behavior regularity of the working-face in the process of underground mining was systematic research with the dip angle of twenty degreen and fity degren. The result showed that: (1)after the underground mining of the phosphorus ore, the stress bearing of the excavation phosphate rock transfer to the surrounding rock mass, the initial rock stress was disturbated, this process has been extend outward with the expansion of the excavation space, deformation and failure problems has been happened, and the new stress equilibrium will be formed in the last, mined-out area was formed after ore body's excavation, near the gob roof area formated stress unloading area, stress formed in certain areas ahead of the stope roof pressurization district, with the excavation of the ore bodies, the roof stress pressurization district dynamic forward position, the pressurization district scope and degree of pressure also decreases as the excavation scope of mined-out area space and gradually increase, and is located in the rear area of the stope deformation of old goaf roof damage fracture belt and the abscission zone was gradually closed. and in the mined-out area space range after reaching a certain size tends to be stable,then recovery section stress and to support its upper part of the gravity of overburden rock. (2)As the orebody dip Angle increases, the same excavation space range, goaf in front of the maximum stress concentration factor was reduced, unloading of overburden rock and concentrated area of the whole range becamed smaller, the rock pressure activity becamed easing as a whole. Relevant results can provide Yunnan phosphate group co., LTD., subordinate to the mines and mining under similar conditions of phosphate rock mountain project to provide certain reference basis. © (2014) Trans Tech Publications, Switzerland.
Li X.,Yunnan Phosphate Chemical Group Co.
Electronic Journal of Geotechnical Engineering | Year: 2015
Taking the Haikou phosphate rock of the largest open-air phosphate mining company-Yunnan Phosphate Chemical Group Co., LTD (YPC) as engineering background, its mining transport process was studied on the basis of the ore body characteristics of the open pit mine and the specific conditions of mining technology, and combine the mining transport process of the domestic and foreign similar conditions of surface phosphate mine. The results showed that: (1) With the continue increasing of oil prices, energy consumption, labor cost and the transportation distance, the single car intermittent transportation process will gradually be eliminated, the continuous and semi-continuous combined transport process with higher degree of mechanization and automation will be carried out in the deep mining stage. (2) Along with the national requirements on environmental protection is increasingly severe, electric double energy harvesters and pure electric car hydraulic drives are the future development direction of mining transportation equipments. (3) Large scale, digital and intelligent is the ultimate direction of mining transportation equipment in the future. It is also the main direction of mining transport process optimization. Related research could provide technical and theoretical guidance for the selection and optimization of process mining transportation of Yunnan Phosphate Chemical Group Co., LTD and a large number of similar occurrence conditions of open phosphorus mines at home and abroad. © 2015 ejge.
Zheng W.-B.,Tongji University |
Zhuang X.-Y.,Tongji University |
Li Y.-J.,Yunnan Phosphate Chemical Group Co. |
Cai Y.-C.,Tongji University
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2013
The widely-used analysis methods for slope stability based on the limit equilibrium conditions have limitations. In the limit equilibrium method, the constitutive model for soils or rocks cannot be considered, and assumptions are needed between slices of soils/rocks. The strength reduction method, another dominant method for slope stability analysis, requires iterative calculations and cannot represent the effect of stress paths. Besides, it does not give the slip surface directly. Based on the current stress state of slopes, the numerical manifold method, which can unify the continuum analysis and discontinuum analysis with its dual covers, is adopted to calculate the stress distributions of soil slopes or rock slopes with joints. Then the slope stability analysis is converted to a graph problem, and the Bellman-Ford algorithm is used to obtain the slip surface and the safety factor which is defined as the ratio of the resistant force and the slip force along the slip surface. The proposed method removes the difficulties in iterative calculations and unifies the stability analysis of rock/soil slopes, and is capable of including the effects of stress paths.
Li Y.-J.,Yunnan Phosphate Chemical Group Co. |
Li X.-S.,Yunnan Phosphate Chemical Group Co.
Environment, Energy and Sustainable Development - Proceedings of the 2013 International Conference on Frontier of Energy and Environment Engineering, ICFEEE 2013 | Year: 2014
Reclamation years and reclamation vegetation types are two key factors influencing the quality of soil under restoration. Investigations of the effects of reclamation years and vegetation types on soil properties and relevant processes will contribute to a better understand of soil restoration dynamics at different years using different vegetation types. In addition, such studies will shed lights on the evolution of soil fertility and related processes. In this study, changes in soil fertility and driving forces were analyzed based on data from Kunyang Phosphate Mine, where soil restoration has been conducted for more than 30 years using various vegetation types. Effects of reclamation years and vegetation types on soil pH, organic matter content, total nitrogen, total phosphorus, total potassium, available nitrogen, available phosphorus and available potassium were quantitatively determined. Correlation analyses were conducted to determine the driving forces for soil property change. Knowledge obtained will provide reference for selection of vegetation types to improve soil quality in the mining site. © 2014 Taylor & Francis Group, London.
Jing X.-F.,Chongqing University |
Yin G.-Z.,Chongqing University |
Yin G.-Z.,University of the Southwest |
Wei Z.-A.,Chongqing University |
And 3 more authors.
Yantu Lixue/Rock and Soil Mechanics | Year: 2011
Based on the physical model experiment and the design data of Xiaoda'e tailings impoundment, the course of tailings dam gravitational collapse in flood was modeled with the field tailings. The water system is controlled to model the tailings impoundment to suffer the flood situation, through the technique of side displacement points, water level measurement pipes, stress transducers and digital photography measurement, a series of important test data are obtained; such as displacements, saturation line, stresses and the broken processes, The mechanism and mode of tailings dam failure in flood are explored. The results indicate that: (1) the character of saturation line change has a time lag of the water level of tailings impoundment; (2) in the processes of the flood into tailings impoundment to the maximum water level of tailings impoundment design data in flood, the horizontal stress increment is larger than that of vertical beside dam slope center, and it is one of the important cause of dam failure; (3) the seepage force, buoyant force, gravity and pore pressure are increased by flood; then the cohesion of tailings dam is weakened and the load of dam is augment; then the stability of tailings dam is reduced; (4) the broken mode of tailings dam performs progressive failure; the failure of tailings dam happened in the toe of the dam and evolved from toe to upstream; it is shown pull-typed behavior, the failure slippage faces are composed of multi-arc faces. The model experiment results can provide significant data for deep study the mechanism of collapse and broken mode of such tailings dam in flood, so as to provide useful information for the prevention and control measures in flood disaster.
Guo Y.J.,Yunnan Phosphate Chemical Group Co. |
Du L.P.,Yunnan Phosphate Chemical Group Co. |
Zhong J.,Yunnan Phosphate Chemical Group Co. |
Chen C.Y.,Yunnan Phosphate Chemical Group Co.
Advanced Materials Research | Year: 2014
Weathered phosphate ore is an important part of phosphate ore resources, it contains a huge reserves of this resources in Yunnan regions, and its reserves over 200 million tons. With the gradual consumption of the rich phosphate ore resources, recycling for weathering phosphate ore is receiving more and more people's attention. In this study, using Tian Ning weathered low magnesium phosphate ore which from Yunnan Dianchi Lake area as the study object, and based on its ore properties established a experimental program of pre-desliming with cyclone and then flotation. The P2O5 loss rate under 20% on the desliming operation, then using a single positive flotation process at room temperature, ultimately obtained a test indicators of phosphate concentrate of P2O5 grade of 29.98% and P2O5 recovery of 95.02%, which is a foundation of development and application for Tian Ning weathering phosphate ore. © (2014) Trans Tech Publications, Switzerland.
Yin G.,Chongqing University |
Yin G.,University of the Southwest |
Yin G.,Yunnan Phosphate Chemical Group Co. |
Li X.,Chongqing University |
And 5 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2011
Based on the gently inclined medium thick phosphate layer of the deep part of the east mining section of pithead #6 of Jinning phosphate mine of Yunnan phosphate chemical group Co., Ltd., the similar simulation model experiment for the transition from open pit to underground mining is carried out by using the mine pressure plane stress similar simulation experimental frame in College of Resources and Environmental Sciences, Chongqing University. The experimental results show as follows: (1) Affected by the underground mining, the stress distribution of the top, lumbar and bottom of open pit slope has readjusted; with the expanding of mining range, it presents a dynamic change trend that being in compression, then the compressive stress increases, finally being in tension in whole. Because of the supporting protective effect of boundary pillar, the vertical sink of open pit slope is very small after underground mining. (2) After the extraction of underground phosphate, a abutment pressure zone in a certain area of roof which is behind and in front of the underground goaf is formed; but in the area of roof which is close to upper side of underground goaf, a roof stress-relaxation zone appears. And at the same time, in the area of floor which is close to lower part of underground goaf, a floor stress-relaxation zone appears. The stress-relaxation zone expands gradually and the roof abutment pressure zone moves forward dynamically with the advance of extracting along the inclination extension of phosphate layer. (3) Due to the influence of mining, the roof and floor surrounding rocks near the goaf both have different degrees of deformation, the roof strata have different degrees of subsidence and the roof strata have different degrees of rising. The maximum subsidence point of roof and the maximum rising point of floor are located in the centre of underground goaf which is a little close to the lower part, and they moves forward dynamically with the advance of extraction. And the integral shapes of subsidence curve and rising curve of rock stratum are both tend to be bowl shape when the underground mining of phosphate reaches fully mining. Taking the goaf as center, with the increase in the distance from it along vertical and horizontal direction, the deformation of roof and floor strata are both monotone decreasing. (4) When the mining advances to the fault fracture zone and its influence region, the fault fracture zone is activated, it appears slipping and shear fracture along faulted interface. The experimental results have great significance for field engineering of the gently inclined medium thick phosphate layer of the deep part of the east mining section of pithead #6 of Jinning phosphate mine of Yunnan phosphate chemical group Co., Ltd. and similar mines transition from open pit to underground mining.
Yin G.,Chongqing University |
Li W.,Chongqing University |
Li M.,Chongqing University |
Jiang C.,Chongqing University |
And 2 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2013
Based on the self-made triaxial servo-controlled seepage equipment for thermo-hydro-mechanical coupling of coal containing methane, the experimental study of mechanical properties of coal containing methane was performed on raw coal samples in No.10 Mine, Pingdingshan Coal Mining Group Corporation Ltd., under different loading-unloading conditions i. e. increase axial pressure and unload confining pressure. The results show that mechanical properties of coal containing methane under different loading-unloading conditions are different; bearing strength of coal sample under loading-unloading is lower than peak intensity of coal sample under conventional loading; bearing strength of coal under loading-unloading decreases exponentially with the increasing of initial axial force, bearing strength decreases with increase in axial pressure loading speed which presents the power function relationship; it decreases exponentially with the increase in initial confining pressure, it decreases with increase in gas pressure which presents the linear relationship; with increase in axial strain, deformation modulus under different conditions presents the trend which decreases rapidly first then decreases slowly until to remain approximate stable after failure; the Poisson s ratio exhibits the tendency that first decreases then increases and maintains stability at last. The research has an important guiding significance on tunnel supporting and gas extraction.