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| 1 | Deposit 3D modeling and application显示文摘By the aid of the international mining software SURPAC, a geologic database for a multi-metal mine was established, 3D models of the surface, geologic fault, ore body, cavity and the underground openings were built, and the volume of the cavity of the mine based on the cavity 3D model was calculated. In order to compute the reserves, a grade block model was built and each metal element grade was estimated using Ordinary Kriging. Then, the reserve of each metal element and every sublevel of the mine was worked out. Finally, the calculated result of each metal reserve to its actual prospecting reserve was compared, and the results show that they are all almost equal to each other. The absolute errors of Sn, Pb, and Zn reserves are only 1.45%, 1.59% and 1.62%, respectively. Obviously, the built models are reliable and the calculated results of reserves are correct. They can be used to assist the geologic and mining engineers of the mine to do research work of reserves estimation, mining design, plan making and so on. | 罗周全 刘晓明 苏家红 吴亚斌 刘望平 | 2007 | Journal of Central South University of Technology2007，14，2： | 45 |
| 2 | A strength reduction method based on double reduction parameters and its application显示文摘In the traditional strength reduction method,the cohesion and the friction angle adopt the same reduction parameter,resulting in equivalent proportional reduction.This method does not consider the different effects of the cohesion and friction angle on the stability of the same slope and is defective to some extent.Regarding this defect,a strength reduction method based on double reduction parameters,which adopts different reduction parameters,is proposed.The core of the double-parameter reduction method is the matching reduction principle of the slope with different angles.This principle is represented by the ratio of the reduction parameter of the cohesion to that of the friction angle,described asη.With the increase in the slope angle,ηincreases;in particular,when the slope angle is 45°,ηis 1.0.Through the matching reduction principle,different safety margin factors can be calculated for the cohesion and friction angle.In combination with these two safety margin factors,a formula for calculating the overall safety factor of the slope is proposed,reflecting the different contributions of the cohesion and friction angle to the slope stability.Finally,it is shown that the strength reduction method based on double reduction parameters acquires a larger safety factor than the classic limit equilibrium method,but the calculation results are very close to those obtained by the limit equilibrium method. | 袁维 白冰 李小春 汪海滨 | 2013 | Journal of Central South University2013，20，9： | 36 |
| 3 | 岩石材料的岩爆倾向性判据研究:综述与新观点显示文摘为了对岩石材料的岩爆倾向性判据的判别准确性进行综合比较,本文归纳了现有的20种岩爆倾向性判据,并利用14种岩石进行了一系列实验室测试,根据试验结果综合评估这20种岩爆倾向性判据的判别准确性。文中首先详细介绍了20种岩爆倾向性判据,包括其文献出处、定义、计算方法和具体的判据分级标准。随后,对14种岩石进行了一系列的实验室测试,包括单轴压缩试验、一次加卸载单轴压缩试验和巴西劈裂试验等,利用所得试验数据计算了20种判据针对每种岩石的岩爆倾向性判别结果。此外,为了统一评估上述判别结果的准确性,引入了一种基于室内实验室测试岩石试样破坏结果和现象的岩爆倾向性分级标准。将依据该分级标准得出的各岩石的实际岩爆倾向性与20种判据的判别结果进行对比,结果表明,基于剩余弹性能指数这一判据的判别结果与14种岩石的实际岩爆倾向性完全一致,其他判据的结果均存在误判的情况。剩余弹性能指数以线性储能规律为基础,而且以差值的形式进行定义,并考虑了岩石破坏全过程的能量转化。上述特点确保了其判别准则的科学性和准确性。根据以上分析可以得出,基于剩余弹性能指数的岩爆倾向性判据相对于其他判据更加科学、准确,在对岩石材料的岩爆倾向性进行评价时推荐优先使用该判据。 | 宫凤强 王云亮 罗松 | 2020 | Journal of Central South University2020，27，10： | 38 |
| 4 | Longitudinal forces of continuously welded track on high-speed railway cable-stayed bridge considering impact of adjacent bridges显示文摘A proven beam-track contact model was used to analyze the track-structure interaction of CWR (continuously welded track) on bridge. Considering the impact of adjacent bridges, the tower-cable-track-beam-pier-pile finite element model of the cable-stayed bridge was established. Taking a bridge group including 40-32m simply-supported beam and (32+80+112)m single-tower cable-stayed bridge and 17-32m simply-supported beam on the Kunming-Shanghai high-speed railway as an example, the characteristics of CWR longitudinal force on the cable-stayed bridge were studied. It is shown that adjacent bridges must be considered in the calculation of the track expansion force and bending force on cable-stayed bridge. When the span amount of adjacent bridges is too numerous, it can be simplified as six spans; the fixed bearing of adjacent simply-supported beams should be placed on the side near the cable-stayed bridge; the track expansion device should be set at the bridge tower to reduce the track force near the bridge abutment. | 戴公连 闫斌 | 2012 | Journal of Central South University2012，19，8： | 31 |
| 5 | Numerical analyses of influence of overlying pit excavation on existing tunnels显示文摘The response of existing tunnel due to overlying excavation was studied using 2D FEM (Finite element method). Three typical locations of tunnel with respect to excavation, namely at the central line under the excavation bottom, directly under the base of diaphragm wall and outside of diaphragm, were considered. The variation of tunnel response with the change of location of tunnel was analyzed. The stress path of soil surrounding tunnel during the process of excavation was compared. Numerical analysis results indicate that the underlying tunnels at different locations under the excavation will experience convergence and divergence due to overlying excavation. Moreover, the tunnel located below base of diaphragm wall will experience distortion. The deformation is mainly due to the uneven changes of ground contact pressure on tunnel linings. Both the vertical and horizontal displacement of the tunnel decrease with the increase of the tunnel embedded depth beneath the formation of excavation. | 郑刚 魏少伟 | 2008 | Journal of Central South University2008，15，S2： | 29 |
| 6 | Directly searching method for slip plane and its influential factors based on critical state of slope显示文摘In order to determine the slip plane of slope directly by the calculation results of strength reduction method, and analyze the influential factors of slope stability, a numerical model was established in plane strain mode by FLAC3D for homogeneous soil slope, whose parameters were reduced until the slope reached the critical state. Then FISH program was used to get the location data of slip plane from displacement contour lines. Furthermore, the method to determine multiple slip planes was also proposed by setting different heights of elastic areas. The influential factors for the stability were analyzed, including cohesion, internal friction angle, and tensile strength. The calculation results show that with the increase of cohesion, failure mode of slope changes from shallow slipping to the deep slipping, while inclination of slip plane becomes slower and slipping volume becomes larger; with the increase of friction angle, failure mode of slope changes from deep slipping to shallow slipping, while slip plane becomes steeper and upper border of slip plane comes closer to the vertex of slope; the safety factor increases little and slip plane goes far away from vertex of slope with the increase of tensile strength. | 林杭 曹平 宫凤强 李江腾 桂易林 | 2009 | Journal of Central South University2009，16，1： | 30 |
| 7 | 基于小波变换和改进中值滤波的医学图像耦合去噪算法(英文)显示文摘为了克服医学图像采集和传输过程中的图像模糊和边缘丢失现象,提出了一种基于小波变换和改进中值滤波的医学图像耦合去噪方法。该方法由四个模块组成:图像采集,图像存储,图像处理和图像重建。图像采集,获取包含高斯噪声和脉冲噪声的医学图像。图像存储,包括原始图像和处理后图像的数据、参数等信息的保存。在第三模块中,通过小波分解将医学图像分解为四个子带(LL,HL,LH,HH),其中LL为低频部分,LH,HL,HH分别为水平,垂直和对角线高频部分。利用改进的小波阈值处理高频系数,保留低频系数,并在小波阈值处理后对三个高频子带进行改进中值滤波处理。最后一个模块是图像重建,即通过小波重构去噪后的图像。这种方法的优点是结合中值滤波和小波的优点,去噪效果更好,而不是前两种方法的简单组合。通过DWT和改进的中值滤波器系数耦合去噪,对于包含复杂噪声的高精度医学图像处理非常实用。将所提算法的实验结果与中值滤波,小波变换,Contourlet和DT-CWT等方法的结果进行了比较。根据视觉评价指标PSNR和SNR以及Canny边缘检测得出:在低噪声图像中,PSNR和SNR分别提高10%~15%;在高噪声图像中,PSNR和SNR增加2%~6%。与其他方法相比,该算法取得了较好的结果,为医学诊断提供了重要方法。 | 陈炳权 崔金鸽 徐庆 舒婷 刘宏立 | 2019 | Journal of Central South University2019，26，1： | 27 |
| 8 | 酸浸-分步萃取法从赤泥中回收铁和稀土(英文)显示文摘提出了一种'酸浸-配位萃取'选择性回收赤泥中的铁和稀土的新工艺。浸出过程表明,在优化条件下,Fe、Al、Ti、Sc、La、Ce、Nd和Y的浸出率分别可达95.9%,82.1%,68.3%,93.3%,82.3%,96.9%,98.3%和95.6%。Aliquat 336在高氯体系下表现出良好的萃铁性能,以30%Aliquat 336+15%仲辛醇+55%煤油为萃取有机相对浸出液中的铁进行萃取,在相比为1,萃取时间为20 min的条件下,铁单级萃取率可达95.7%,各稀土元素损失率不足10%,铁和稀土有较好的分离效果。以P204对萃铁后液中的钪进行回收,可以将钪富集在萃取剂中与Al和大部分稀土元素分离。 | 张雪凯 周康根 陈伟 雷清源 黄颖 彭长宏 | 2019 | Journal of Central South University2019，26，2： | 27 |
| 9 | Simulation of spatially coupling dynamic response of train-track time-variant system显示文摘There exist three problems in the calculation of lateral vibration of the train-track time-variant system athome and abroad and the method to solve them is presented. Spatially coupling vibration analysis model of train-track time-variant system is put forward. Each vehicle is modeled as a multi-body system with 26 degrees of freedomand the action of coupler is also considered. The track structure is modeled as an assembly of track elements with 30degrees of freedom, then the spatially coupling vibration matrix equation of the train-track time-variant system is es-tablished on the basis of the principle of total potential energy with stationary value and the 'set-in-right-position'rule. The track vertical geometric irregularity is considered as the excitation source of the vertical vibration of thesystem, and the hunting wave of car bogie frame is taken as the excitation source of lateral vibration of the system.The spatially coupling vibration matrix equation of the system is solved by Wilson-θ direct integration method. Theapproximation of the calculated results to the spot test results demonstrates the feasibility and effectiveness of thepresented analysis method. Finally, some other vibration responses of the system are also obtained. | 向俊 李德建 曾庆元 | 2003 | Journal of Central South University of Technology2003，10，3： | 26 |
| 10 | Cavity 3D modeling and correlative techniques based on cavity monitoring显示文摘According to the mining method for Dongguashan Copper Mine and Tongkeng Mine in China, and with the help of the cavity monitoring system(CMS) and mining software Surpac, the 3D cavity models were established exactly. A series of correlative techniques for calculating stope over-excavation and under-excavation, stope dilution and ore loss rates, and the blasting design of the pillar with complicated irregular boundaries were developed. These techniques were applied in Dongguashan Copper Mine and Tongkeng Mine successfully. Using these techniques, the dilution rates of stopes 52-2#, 52-6#, 52-8# and 52-10# of Dongguashan Copper Mine are calculated to be 2.12%, 8.46%, 12.67% and 10.68%, respectively, and the ore loss rates of stopes 52-6# and 52-8# are 4.41% and 3.70%, severally. Furthermore, according to the design accomplished by the technique for a pillar of Tongkeng Mine with irregular boundary, the volume, total length of boreholes and the dynamite quantity of the pillar are computed to be 1.2×104 m3, 2.98 km and 10.97 t, correspondingly. | 罗周全 刘晓明 张保 鹿浩 李畅 | 2008 | Journal of Central South University of Technology2008，15，5： | 25 |
| 11 | Formation mechanism of aerodynamic drag of high-speed train and some reduction measures显示文摘Aerodynamic drag is proportional to the square of speed. With the increase of the speed of train, aerodynamic drag plays an important role for high-speed train. Thus, the reduction of aerodynamic drag and energy consumption of high-speed train is one of the essential issues for the development of the desirable train system. Aerodynamic drag on the traveling train is divided into pressure drag and friction one. Pressure drag of train is the force caused by the pressure distribution on the train along the reverse running direction. Friction drag of train is the sum of shear stress, which is the reverse direction of train running direction. In order to reduce the aerodynamic drag, adopting streamline shape of train is the most effective measure. The velocity of the train is related to its length and shape. The outer wind shields can reduce train's air drag by about 15%. At the same time, the train with bottom cover can reduce the air drag by about 50%, compared with the train without bottom plate or skirt structure. | 田红旗 | 2009 | Journal of Central South University2009，16，1： | 25 |
| 12 | Prediction and optimization of process parameter of friction stir welded AA5083-H111 aluminum alloy using response surface methodology显示文摘A systematic approach was presented to develop the empirical model for predicting the ultimate tensile strength of AA5083-H111 aluminum alloy which is widely used in ship building industry by incorporating friction stir welding(FSW) process parameters such as tool rotational speed,welding speed,and axial force.FSW was carried out considering three-factor five-level central composite rotatable design with full replications technique.Response surface methodology(RSM) was applied to developing linear regression model for establishing the relationship between the FSW process parameters and ultimate tensile strength.Analysis of variance(ANOVA) technique was used to check the adequacy of the developed model.The FSW process parameters were also optimized using response surface methodology(RSM) to maximize the ultimate tensile strength.The joint welded at a tool rotational speed of 1 000 r/min,a welding speed of 69 mm/min and an axial force of 1.33 t exhibits higher tensile strength compared with other joints. | R.Palanivel P.Koshy Mathews | 2012 | Journal of Central South University2012，19，1： | 26 |
| 13 | 埋深对圆形硬岩隧洞板裂破坏特征影响的模拟试验显示文摘为了研究埋深对圆形隧洞诱发板裂破坏的影响,对含圆形孔洞的立方体红砂岩试样进行了一系列的真三轴压缩试验,并采用自制的微型视频监测设备对孔洞洞壁破坏过程进行了实时监测和记录,得到了不同初始埋深(500、1000和1500 m)圆形隧洞的竖直应力调整过程中洞壁破坏完整演化过程。结果表明:隧洞洞壁在发生应变型岩爆之前,均形成了板裂破坏,并最终形成V-型槽。隧洞初始破坏所需的远场主应力与深度线性正相关。随着深度的增加,隧洞洞壁初始破坏所需的应力明显增大,板裂破坏变得越剧烈,岩片的尺寸和质量、V-型槽的深度和宽度均增大,破坏区的范围逐渐由隧洞洞壁局部扩大至整个洞壁。因此,随着深度的增加,隧洞支护区域应相应增大,以防止板裂破坏的发生。 | 罗勇 宫凤强 李夕兵 王善勇 | 2020 | Journal of Central South University2020，27，3： | 26 |
| 14 | 动态加载率对深部岩石破坏过程裂隙分形维数的影响显示文摘本文采用高速摄像与数字散斑法相结合的方法记录煤样动态破坏过程,并通过图像处理对高速摄影捕捉到的试样图片进行裂隙提取,采用盒分形维数定量描述煤样裂隙,得到了不同加载率冲击载荷下煤样动态裂隙的分形维数变化特性。结果表明,分形方法可以有效地定量描述动载荷作用下煤样裂隙演化过程。在动态加载过程中,煤体裂隙演化呈现明显的阶段性;在裂隙扩展阶段,分形维数随着加载的进行迅速增大;在裂隙宽度增加阶段,分形维数随着加载的进行缓慢增大;在动态加载过程中,煤样裂隙扩展阶段时间随着加载率的增大而逐渐延长,随着加载率的增大,裂纹初始产生时间提早;在相同的加载时间内,分形维数随着加载率的增大而逐渐增大。 | 高明忠 张建国 李圣伟 王满 王英伟 崔鹏飞 | 2020 | Journal of Central South University2020，27，10： | 25 |
| 15 | Optimization of suspension system of off-road vehicle for vehicle performance improvement显示文摘Vehicle suspension design includes a number of compromises to provide good leveling of stability and ride comfort. Optimization of off-road vehicle suspension system is one of the most effective methods, which could considerably enhance the vehicle stability and controllability. In this work, a comprehensive optimization of an off-read vehicle suspension system model was carried out using software ADAMS. The geometric parameters of suspension system were optimized using genetic algorithm (GA) in a way that ride comfort, handling and stability of vehicle were improved. The results of optimized suspension system and variations of geometric parameters due to road roughness and different steering angles were presented in ADAMS and the results of optimized and conventional suspension systems during various driving maneuvers were compared. The simulation results indicate that the camber angle variations decrease by the optimized suspension system, resulting in improved handling and ride comfort characteristics. | M. Mahmoodi-Kaleibar I. Javanshir K. Asadi A. Afkar A. Paykani | 2013 | Journal of Central South University2013，20，4： | 24 |
| 16 | Numerical analysis of application for induction caving roof显示文摘New method for handling roof of the base successive mining is proposed, which is induction caving in the roof. The key is that it is made certain to the station of the space-time in the induction caving roof, as the stress is released with the mining process. And applying the catastrophe theory, the influencing factors of induction caving roof are studied in the emptied areas, such as the mechanical property of the surrounding rock, the area of the gob,the scope and dimension of tensile stress. The results show that the key factor is the area of the gob to the method of the induction caving roof. Then according to the geology and the ore characteristic, the three dimension FEM mechanical model is built in Tongkeng Mine, the laws of the tensile stress are analyzed to the space and the time in the roof with the mining, then it is rational design to the mine step and time of the handing the roof. | HU Jian-hua ZHOU Ke-ping LI Xi-bing YANG Nian-ge SU Jia-hong | 2005 | Journal of Central South University of Technology2005，12，z1： | 22 |
| 17 | Upper bound analysis of slope stability with nonlinear failure criterion based on strength reduction technique显示文摘Based on the upper bound limit analysis theorem and the shear strength reduction technique,the equation for expressing critical limit-equilibrium state was employed to define the safety factor of a given slope and its corresponding critical failure mechanism by means of the kinematical approach of limit analysis theory.The nonlinear shear strength parameters were treated as variable parameters and a kinematically admissible failure mechanism was considered for calculation schemes.The iterative optimization method was adopted to obtain the safety factors.Case study and comparative analysis show that solutions presented here agree with available predictions when nonlinear criterion reduces to linear criterion,and the validity of present method could be illuminated.From the numerical results,it can also be seen that nonlinear parameter m,slope foot gradient β,height of slope H,slope top gradient α and soil bulk density γ have significant effects on the safety factor of the slope. | 赵炼恒 李亮 杨峰 罗强 刘项 | 2010 | Journal of Central South University2010，17，4： | 22 |
| 18 | Seismological method for prediction of areal rockbursts in deep mine with seismic source mechanism and unstable failure theory显示文摘The research on the rock burst prediction was made on the basis of seismology,rock mechanics and the data from Dongguashan Copper Mine(DCM) ,the deepest metal mine in China.The seismic responses to mining in DCM were investigated through the analyses of the spatio-temporal distribution of hypocenters,apparent stress and displacement of seismic events,and the process of the generation of hazardous seismicity in DCM was studied in the framework of the theory of asperity in the seismic source mechanism.A method of locating areas with hazardous seismicity and a conceptual model of hazardous seismic nucleation in DCM were proposed.A criterion of rockburst prediction was analyzed theoretically in the framework of unstable failure theories,and consequently,the rate of change in the ratio of the seismic stiffness of rock in a seismic nucleation area to that in surrounding area,dS/dt,is defined as an index of the rockburst prediction.The possibility of a rockburst will increase if dS/dt>0,and the possibility of rock burst will decrease if dS/dt<0.The correctness of these methods is demonstrated by analyses of rock failure cases in DCM. | 唐礼忠 XIA K W | 2010 | Journal of Central South University2010，17，5： | 23 |
| 19 | The Aging Feature of Al-L-Cu-Mg-Zr Alloy Containing Sc显示文摘The aging behaviors of Al 1.42%Li 2.41%Cu 0.93%Mg 0.073%Zr 0.17%Sc(mass fraction, the same below) alloy at room temperature, 160 ℃ , and 160 ℃ after 8% pre deformation were studied respectively by hardness measurement. The microstructure of the alloy in various aging conditions was observed by TEM. The results show that the main precipitations of the alloy in quenching condition are the particles containing Sc and Zr which have certain coherent relation with the matrix. Addition of Sc in Al Li Cu Mg Zr alloy will be favorable to promoting precipitation. The particles can serve as preferred nucleation sites for δ′ phases which accelerate the aging hardening rate at initial aging. The main hardening phases of the alloy aged at 160 ℃ are δ′ and δ′/β′ composite precipitates. The size of the composite precipitates is very small (nanometer size). The composite precipitates will preclude efficiently the formation concentrative slip location and will improve the mechanical properties of the alloy. S′ phase will occur in the alloy aged at 160 ℃ after 8% pre deformation. It is found that 8% pre deformation has no obvious influence on the precipitation of the composite phase. | TAN Cheng yu,ZHENG Zi qiao,XIA Chang qing,LIANG Ying (Department of Materials Science and Engineering, Central South University of Technology, Changsha 410083, China) | 2000 | Journal of Central South University2000，12，2： | 22 |
| 20 | Risk evaluation of rock burst through theory of static and dynamic stresses superposition显示文摘Rock burst is one of the most catastrophic dynamic hazards in coal mining. A static and dynamic stresses superposition-based(SDSS-based) risk evaluation method of rock burst was proposed to pre-evaluate rock burst risk. Theoretical basis of this method is the stress criterion incurring rock burst and rock burst risk is evaluated according to the closeness degree of the total stress(due to the superposition of static stress in the coal and dynamic stress induced by tremors) with the critical stress. In addition, risk evaluation criterion of rock burst was established by defining the 'Satisfaction Degree' of static stress. Furthermore,the method was used to pre-evaluate rock burst risk degree and prejudge endangered area of an insular longwall face in Nanshan Coal Mine in China. Results show that rock burst risk is moderate at advance extent of 97 m, strong at advance extent of 97-131 m,and extremely strong(i.e. inevitable to occur) when advance extent exceeds 131 m(mining is prohibited in this case). The section of two gateways whose floor abuts 15-3 coal seam is a susceptible area prone to rock burst. Evaluation results were further compared with rock bursts and tremors detected by microseismic monitoring. Comparison results indicate that evaluation results are consistent with microseismic monitoring, which proves the method's feasibility. | 李振雷 窦林名 王桂峰 蔡武 何江 丁言露 | 2015 | Journal of Central South University2015，22，2： | 22 |
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