Wuhan Iron and Steel Group Minerals Co.

Wuhan, China

Wuhan Iron and Steel Group Minerals Co.

Wuhan, China

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Qu H.Y.,Chinese Academy of Geological Sciences | Qu H.Y.,Nanjing University | Wang H.L.,Chinese Academy of Geological Sciences | Pei R.F.,Chinese Academy of Geological Sciences | And 3 more authors.
Acta Petrologica Sinica | Year: 2012

During the Late Mesozoic, extensive magmatism and associated ore deposits were developed in the Middle-Lower Yangtze River metallogenic belt, East China.As the Tieshan and Jinshandian quartz diorite in the southeastern Hubei Province examples, we performed in situ zircon U-Pb dating and Hf isotopic analyses on 5 samples. Twenty-six zircons in the quartz diorite from the Tieshan sample jlsl-110 yield excellent concordant results with a weighted mean 206Pb/238U age of 138.9 ±0.96Ma (n = 26, MSWD =0.82). Zircons from Tieshan sample jls3 yield excellent concordant results with a weighted mean 206 Pb/238 U age of 138.2 ±0.94Ma (n =24, MSWD =0.85). Zircons from Tieshan sample jls4 yield excellent concordant results with a weighted mean Pb/ U age of 131.0 ± 1.2Ma ( n = 11 , MSWD =0.94). Zircons from Tieshan sample jls5 yield excellent concordant results with a weighted mean 206Pb/238U age of 118.9 ± 1.2Ma ( n = 14, MSWD = 1.20) . Zircons from Jinshandian sample jsd yield excellent concordant results with a weighted mean 206Pb/238U age of 128.6 ±0.88Ma (n =22, MSWD =0.98). εHf(0) and εHf(t) values of the Tieshan quartz diorite are minus.Hf model age of the first stage (t DM1 ) is 1.33Ga and the age of the second stage (tDm ) is 2.03Ga. εHf(0) and εHf(t) values of the Jinshandina quartz diorite are minus.Hf model age of the first stage (tDM1 ) is 1.03 Ga and the age of the second stage (tDM2) is 1.56 Ga. Hf isotopic compositions from the Tieshan and Jinshandian quartz diorites show that maybe the curst-derived materials joined in the rock body forming supplement for the crust-derived magma of the Middle-Lower Yangtze River. Based on the datum of petrology, geochemistry and ore isotope ages, we can infer that the skarn type iron deposits of the Early Cretaceous in the southeastern Hubei Province formed on the environment of lithospheric extending and thinning.


Xu C.-Y.,University of Science and Technology Beijing | Sun T.-C.,University of Science and Technology Beijing | Qi C.-Y.,Wuhan Iron and Steel Group Minerals Co. | Li Y.-L.,University of Science and Technology Beijing | And 4 more authors.
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2011

With a high-phosphorus oolitic hematite ore as the sample, the effects of reductants on direct reduction and synchronous dephosphorization were investigated, the effects of different solid reductant dosages on the contents of Fe and P as well as iron recovery in direct reduced iron (DRI) at a fixed dephosphorization agent dosage were studied, and the roasted products were also discussed. The results show that the fixed carbon and volatile in the reductants have a great influence on Fe grade and recovery of direct iron, and the ash has a great effect on P grade of the direct iron. The contents of Fe and wustite in the roasted products increase and decrease respectively by increasing the dosage of reductants, the trend of sodium aluminosilicate generated from the reaction of dephosphorization agent and the gangue minerals can be reduced by increasing the dosage of reductants. Under the same dosage of reductants, the highest content of Fe in the roasted product is produced by using activated carbon as reductant, followed by coke, anthracite and lignite, the content of wustite in the roasted products is gradually decreased. Among these solid reductants, lignite has the best effect of direct reduction and synchronous dephosphorization, while anthracite and coke take the second place, and activated carbon has the worst effect.


Song W.-D.,University of Science and Technology Beijing | Du J.-H.,University of Science and Technology Beijing | Yin X.-P.,Wuhan Iron and Steel Group Minerals Co. | Tang G.-Y.,Wuhan Iron and Steel Group Minerals Co.
Meitan Xuebao/Journal of the China Coal Society | Year: 2010

Presented a case study and gave a detailed discussion on how to predict the caving process and the subsidence range in the western region of Chengchao iron mine. First, analyzed on monitoring data (such as the caving curved of roof surrounding rock, accumulating conditions of the ore body, stratigraphic configuration and drill core datas) of two drill-holes, revealed the fundamental features and principles of the caving process of roof surrounding rock. Then, an observation system for surface subsidence was built based on 103settlement observation points and 55horizontal displacement points. Through observational data of 15months, especially relation curves between the settling amount, the settlement rate, the horizontal displacement and the time, the developing process of settlement crater were analyzed to show the magnitude characteristics and general principles of the surface deformation. The research results show the caving mechanism of roof surrounding rock and the essential law of surface deformation during the process of pillarless sub-level caving in an iron mine.


Cao S.,University of Science and Technology Beijing | Cao S.,State Key Laboratory of High Efficient Mining and Safety of Metal Mines of Ministry of Education | Song W.,University of Science and Technology Beijing | Song W.,State Key Laboratory of High Efficient Mining and Safety of Metal Mines of Ministry of Education | And 3 more authors.
International Journal of Mining Science and Technology | Year: 2016

Combined with a digital bored photography system and in-situ statistics concerning the joints and fissures of both ore-body and surrounding rock, a 2D discrete model was constructed using UDEC. The stress field and displacement field changes of different sublevel stoping systems were also studied. Changes in the overlying rock strata settlement pattern has been analyzed and validated by in-situ monitoring data. The results show that: in the caving process, there exists an obvious delay and jump for the overlying rock strata displacement over time, and a stable arch can be formed in the process of caving, which leads to hidden goafs. Disturbed by the mining activity, a stress increase occurred in both the hanging wall and the foot wall, demonstrating a hump-shaped distribution pattern. From the comparison between simulation results and in-situ monitoring results, land subsidence shows a slow-development, sudden-failure, slow-development cycle pattern, which leads eventually to a stable state. This pattern validates the existence of balanced arch and hidden goafs. © 2016 Published by Elsevier B.V. on behalf of China University of Mining & Technology.


Wu L.,Wuhan University of Science and Technology | Yu D.,Wuhan Iron and Steel Group Minerals Co. | Duan W.,Wuhan University of Science and Technology | Zhong D.,Wuhan University of Science and Technology
Advanced Materials Research | Year: 2012

In order to enhance smooth blasting adaptability and its effect in mining for rock mass complex characteristics, and based on the dynamic finite element analysis software with the material model of Mat-Plastic-Kinemetic, the dynamic stress characteristics and failure mechanism of blast-hole near-field with level soft interlayer are researched on different air-decked charge structures. The main effect of soft interlayer on top-air-decked charge structure is the tensile strength and range at the top of blasting hole, but the main effect of soft interlayer on middle-air-decked charge structure is the tensile strength and range at the middle of blasting hole, and some effect of soft interlayer on bottom-air-decked charge structure is the extension of rock crack at the bottom of blast-hole.


Tan Y.-Y.,University of Science and Technology Beijing | Song W.-D.,University of Science and Technology Beijing | Lei Y.-K.,Wuhan Iron and Steel Group Minerals Co. | Han H.-L.,University of Science and Technology Beijing
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | Year: 2012

Primary selection of mining methods was handled as a classification problem with Chengchao Iron Mine as the engineering background. Fuzzy clustering was used to make primary classification in accordance with the similarity degree of technical factors. This can decrease the subjective arbitrariness of using the engineering analog method and improve the scientific accuracy of the primary selection. In consideration of economic benefit, resource utilization, labor productivity, safety and environment factors, a comprehensive hierarchy structure of evaluation indexes for mining method optimization was built to get a reasonable weight matrix. This provides a better solution for weight distribution in multi-factor decision-making when the judging indexes of mining programs show cross superiority. Finally, the optimal mining method was selected by fuzzy comprehensive judgment.


Tan Y.,University of Science and Technology Beijing | Song W.,University of Science and Technology Beijing | Li T.,Wuhan Iron and Steel Group Minerals Co. | Xia H.,Wuhan Iron and Steel Group Minerals Co.
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2014

In this paper, selection of mining methods is handled as a system engineering problem with multi-objective decision-making. First, in consideration of technical feasibility, economic benefit, resource utilization, labor productivity, safety and environment factors, a comprehensive multi-objective decision-making index system for mining method optimization is built. Then, relatively objective fuzzy weights are assigned by fuzzy judgment matrix after consistency check and adjustment. Finally, an engineering project is conducted concerning filling mining method selection in Jinshandian iron mine. On the basis of primary classification by fuzzy clustering, the sublevel stoping filling method is selected as the optimal mining one by multi-objective fuzzy decision method.


Tan Y.-Y.,University of Science and Technology Beijing | Song W.-D.,University of Science and Technology Beijing | Li T.-Y.,Wuhan Iron and Steel Group Minerals Co. | Xia H.,Wuhan Iron and Steel Group Minerals Co.
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | Year: 2014

Mining method selection was handled as a system engineering problem with multi-objective decision-making. First, a comprehensive multi-objective decision-making index system for mining method optimization was built in consideration of technical feasibility, economic benefit, resource utilization, labor productivity, safety and environment factors. Then, the analytic hierarchy process, fuzzy judgment matrix and Delphi method were used to get three groups of single weights for the decision-making index system. On this basis, a group of reasonable combination weights were determined through Kendall nonparametric test and Spearman rank correlation analysis. This provides a better solution for weight distribution in multi-objective decision-making, and can improve the rationality and scientificity of weight-determining methods for the decision-making index system. Finally, Jinshandian iron mine was taken as a case study on mining method selection, and the optimal mining method, sublevel open stope with backfill, was determined by this combination weight and fuzzy multi-objective decision-making method.


Wu L.,Wuhan University of Science and Technology | Yu D.,Wuhan Iron and Steel Group Minerals Co LTD | Duan W.,Wuhan University of Science and Technology
Applied Mechanics and Materials | Year: 2012

In modern mining and project construction, how to make use of the explosion energy effectively is the key technology demanding prompt solution at present. The application of air-decked blasting technology has enabled the efficient use of explosion energy, which proves that the air-decked blasting technology can overcome many disadvantages caused by column charge effectively, getting ideal explosion effect. Based on the dynamic finite element analysis software with the material model of Mat-Plastic-Kinemetic, the dynamic stress characteristics and failure mechanism of blast-hole near-field with level soft interlayer are researched with different air-decked charge structures. There is significant effect on the rock at the middle of blast-hole if top-air-decked charge structure with indirect initiation and middle-air-decked charge structure with two ends initiation at the same time. If bottom-air-decked charge structure with indirect initiation, soft inter-layer don't change the peek of compression and tensile stress curves of typical elements with distance from the bottom of hole, so there is not effect significantly of level soft interlayer on bottom-air-decked charge structure with indirect initiation. © (2012) Trans Tech Publications.


Du J.,University of Science and Technology Beijing | Song W.,University of Science and Technology Beijing | Lei Y.,Wuhan Iron and Steel Group Minerals Co.
2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings | Year: 2011

The paper is based on actual situation of Chengchao iron mine to study the pillar recovery schemes under challenging conditions. According to the three-dimensional ore body and adjacent rock model, rock mechanics test and analyses, a largescale physical and technical emulation model was built, after checked by the terrene monitoring data, and then it was used to study the different scheme. The surface displacement was disposed by ArcGis software, the result shows: the influence dimension of pillar exploit mainly in the left of the pillar and hanger surface, the filling method is effective to limit the ground deformation and maintained the shaft sites stability. The surface deformation of different mine level is phased grow, the impact of pillar extract to ground was shown after-360m level mine finished, particularly after-465m level exploited. The distortion grade of industry building caused by pillar mined is closely related to the distance to the pillar, the washing plan is the most dangerous. Fill mining method is the appropriate plan for the pillar recovery. © 2011 IEEE.

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