Kunming Prospecting Design Institute of China Nonferrous Metals Industry

Kunming, China

Kunming Prospecting Design Institute of China Nonferrous Metals Industry

Kunming, China
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Zhou Y.,Kunming Construction and Management Co. | Fei W.,Kunming University of Science and Technology | Liu W.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry
Advanced Materials Research | Year: 2011

The seepage field of tailings pond is analyzed. Based on the result distribution of hydraulic head and velocity in the dam body, seismic analysis is carried out for the tailings pond in steady flow state. Three seismic waves are input and the safety factors of dam under seismic action are also achieved. The results show that the safety factor will decrease 9%∼16% with the seismic intensity increase one degree. © (2011) Trans Tech Publications, Switzerland.


Liu H.M.,Kunming University of Science and Technology | Wang J.J.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry | Hu J.K.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry | Cao J.,Kunming University of Science and Technology
Applied Mechanics and Materials | Year: 2014

The excavations engineering, which is a traditional topic, has an epoch-marking characteristics in geotechnical engineering. With the process of urbanization, the excavations engineering is confronted with new problems. Firstly, the retaining and protection structure (RPS) which is common at present is introduced. Then, their applicable conditions and advantages and disadvantages are discussed, which can provide basis for selecting the RPS in excavations engineering. On this basis, some important problems which exist in the supporting technology are analyzed, and the developing trend is prospected for the supporting technology in excavations engineering. © (2014) Trans Tech Publications, Switzerland.


Yu Z.H.,Kunming University of Science and Technology | Gui Y.,Kunming University of Science and Technology | Wang Z.C.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry | Hou Y.J.,Kunming University of Science and Technology
Advanced Materials Research | Year: 2014

In allusion to double sheet piles(DSP) global optimal solution, the response surface(RS) technique based on Uniform Design- Support Vector Machine(UD-SVM) was introduced to build the RS by nonparametric regression, thus to avoid the complex non-linear RS form between the double sheet piles parameters and indexes under the current standard. Use the Monte Carlo simulation as generator to produce samples, the RS can do considerable and non-repetitive efficiency prediction and get global optimal value satisfying to the target value with high accuracy and stability, also without figuring out the explicit formulations. This article applied the method to a double sheet piles optimal design, and took minimum engineering quantity as criterion to screen for the optimal parameters aiming at illustrating the feasibility. © (2014) Trans Tech Publications, Switzerland.


Xu L.,Kunming University of Science and Technology | Liu W.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry
Advanced Materials Research | Year: 2013

The liquefaction problem of saturated sand under cyclic loading is essentially a dynamic strength problems,but under the action of load,its strength has a sudden dramatic loss and it is unexpected.so it is different from the general dynamic strength problem.This paper analyzes the dynamic strength of saturated sand under cyclic loading.And its vibration liquefaction mechanism, influencing factors and preventive measures are analyzed and discussed. © (2013) Trans Tech Publications, Switzerland.


Xie J.,Yunnan University | Liu W.,Kunming University of Science and Technology | Liu W.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry | Shi L.,Huaneng Lancang River Hydropower Co. | And 2 more authors.
Advanced Materials Research | Year: 2012

In this paper, it has been studied that types and mechanical properties of tailings silt in Zhuziqing tailings dam based on the Zhuziqing tailings' deposition characteristics, particles size distribution test, physical and mechanical properties test. Then it has been studied subsequently by the dynamic triaxial test, wave velocity test and standard penetration test for tailings silt that the dynamic characteristics, dynamic strength and vibration liquefaction of the tailing silt. Results show that the tailings silt in tailings pond is graded well. Under the condition of isotropic or anisotropic consolidation, dynamic shear modulus of tailings silt increase as the dynamic shear strain decreasing and increase as the increase of confining pressure or consolidation ratio. But the variation law on damping ratio of tailings silt is just opposite to that of dynamic shear modulus. Results also show that there is more liquefied possibility over the seventh sub-dam in the tailings dam, and the liquefied possibility position locates at the place from new sub-dam to deposited beach in tailing pond. © (2012) Trans Tech Publications.


Chen W.,Kunming University of Science and Technology | Chen W.,Yunnan Traffic Consulting Co. | Xu Z.-M.,Kunming University of Science and Technology | Liu W.-L.,Kunming University of Science and Technology | Liu W.-L.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry
Yantu Lixue/Rock and Soil Mechanics | Year: 2015

Differential weathering can cause unstable rock mass in rock slope with alternating strata. The alternating strata can be sandstone and mudstone and belong to the soft and hard rocks. The rock collapse damage is a common form of geological disasters. This paper uses unstable rock mass at Puerdu as case study. The calculation formula for the compressive stress of unstable hard rock block on the soft mudstone base is derived for the slope rock mass with cavity in the soft mudstone due to differential weathering. The stress increases as the cavity depth increase. According to the slope topography, geomorphology and characteristics of geological structure of unstable rock blocks at Puerdu, two kinds of four unstable rock mechanical models due to differential weathering are established. The first type is the type of mudstone base fracturing damage and rotational damage unstable rock block whose main control fissure connectivity rate is equal to 1. The second type is the type of falling and toppling of unstable rock block whose main control fissure connectivity rate is less than 1. The rock strength theory is used to derive the quadratic parabolic Mohr strength envelope equation for sandstone at the study area. The limit equilibrium theory and Mohr strength theory is used to deduce the collapsing damage and judgment expression of four kinds of unstable rock blocks under the gravity, earthquake force and fissure water pressure. The critical collapse boundary equation is derived for the unstable rock mass at the study area. The relationships among rock cavity depth, thickness, height and the main control fissure depth are also derived. Those results provide an intuitive and reliable basis for the prediction and judgment of stability and collapse of the unstable rock mass. ©, 2015, Academia Sinica. All right reserved.


Gui Y.,Kunming University of Science and Technology | Yu Z.-H.,Kunming University of Science and Technology | Liu H.-M.,Kunming University of Science and Technology | Cao J.,Kunming University of Science and Technology | Wang Z.-C.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2015

The peaty soil foundation has notable post-construction settlement due to long-term loading. Based on the test results, the secondary consolidation properties of peaty soil from Kunming and Dali cities are studied, and some influencing factors of the secondary consolidation coefficients (Cα), such as the depth of sampling, consolidation pressure (p), loading ratio (R) and loading method, are discussed. The results show that the curve of e-lgt is mainly reverse "S", and the secondary consolidation deformation has relatively high percentage in the total compressive deformation. The secondary consolidation coefficient (Cα) of peaty soil increases with the increasing consolidation pressure to the peak value, then decreases slowly and stably. But the consolidation pressure corresponding to the peak value of Cα, is about 100~200 kPa, does not agree with the preconsolidation pressure (pc). The mechanism of the secondary consolidation is analyzed by establishing the micro-structure models for peaty soil. A conclusion is drawn that the peak value of consolidation pressure is the critical load which generates peaty soil changing from porous to tight state. Moreover, there is a significant correlativity between the coefficient of secondary consolidation and the compression index, and the Cα/Cc ratio is almost a constant value, which is consistent with the values reported in the literatures for similar soils. ©, 2015, Chinese Society of Civil Engineering. All right reserved.


Gui Y.,Kunming University of Science and Technology | Yu Z.,Kunming University of Science and Technology | Liu H.,Kunming University of Science and Technology | Cao J.,Kunming University of Science and Technology | Wang Z.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2016

Based on a series of test results, the one-dimensional consolidation coefficient and consolidation mechanism of plateau lacustrine peaty soil from Kunming and Dali city were studied, and some factors, such as the depth of sampling, consolidation pressure(p), loading method, loading ratio(R) and preloading were discussed. Test results showed that the consolidation coefficients(Cv) of peaty soil decreased with increasing of consolidation pressure firstly, then reduced slowly and stably. The relationship between the consolidation pressure and the consolidation coefficients of peaty soil was a power regression. Under preloading, the consolidation coefficients of peaty soil were pretty much exactly the same as the nature sample when preloading was lower than 100 kPa. It was lower than the nature sample once the preloading was larger than 200 kPa. When consolidation pressure was larger than 200 kPa, consolidation coefficients of peaty soil changed little with consolidation pressure increased. The mechanisms of consolidation were analyzed, which caused the peculiar consolidation properties was rarely structural strength of natural peaty soil. With consolidation pressure increasing, peaty soil changed from porous to relatively dense state. © 2016, Science Press. All right reserved.


Zhang K.,Central South University | Cao P.,Central South University | Bao R.,Central South University | Bao R.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2013

A rigorous back analysis of shear strength parameters of landslide slip was presented. Kinematical element method was adopted to determine factor of safety and critical failure surface, which overcomes the disadvantage of limit equilibrium method. The theoretical relationship between the combination of shear strength parameters and stability state was studied. The results show that the location of critical slip surface, F/tan φ and F/c depend only on the value of c/tan φ. The failure surface moves towards the inside of slope as c/tan φ increases. According to the information involving factor of safety and critical failure surface in a specific cross-section, strength parameters can be back calculated based on the above findings. Three examples were given for demonstrating the validity of the present method. The shear strength parameters obtained by back analysis are almost consistent with their correct solutions or test results. © 2013 The Nonferrous Metals Society of China.


YANG A.,Nanjing University | ZHU M.,Chinese Academy of Sciences | ZHURAVLEV A.Y.,Moscow State University | YUAN K.,Kunming Prospecting Design Institute of China Nonferrous Metals Industry | And 2 more authors.
Geological Magazine | Year: 2015

Detailed analysis of the distribution of archaeocyaths in five lower Cambrian sections in South China has resulted in the erection of four new archaeocyathan zones and one new archaeocyathan bed. Listed in order of ascending age, these are: the Dailycyathus xiuqiensis Zone; the Dictyocyathus shaanxiensis Zone; the Spirillicyathus duplex Range Zone; the Sibirecyathus meitanensis Range Zone; and the Archaeocyathus yanjiaoensis beds. These new subdivisions permit a correlation of lower Cambrian strata both within the area of the Yangtze Platform (South China) as well as between this region and Siberia, Australia, Western Europe and North America. Within the Yangtze Platform area, archaeocyaths of the Dailycyathus xiuqiensis and Dictyocyathus shaanxiensis zones co-occur with trilobites of the middle and upper Eoredlichia Trilobite Zone of the Qiongzhusian Stage. The Spirillicyathus duplex and the Sibirecyathus meitanensis Range Zone correspond to the Malungia, Yiliangella–Yunnanaspis and Drepanuroides Trilobite zones of the basal and middle Canglangpuan Stage, respectively. Finally, the Archaeocyathus yanjiaoensis beds belong to the Palaeolenus fengyangensis Trilobite Zone of the upper Canglangpuan Stage. Global correlations based on archaeocyath assemblage zones suggest that: (1) the middle–upper Qiongzhusian of South China correlates with the middle Atdabanian Stage of the Siberian Platform, the Warriootacyathus wilkawillinensis Archaeocyath Zone in South Australia, the middle Issendalenian Stage of Morocco and the lower Ovetian Stage in Spain; (2) the lowermost Canglangpuan Stage of South China correlates with the uppermost Atdabanian of the Siberian Platform, the Spirillicyathus tenuis – Jugalicyathus tardus archaeocyath zones in South Australia, the uppermost Issendalenian – lower Banian stages of Morocco, the middle Ovetian Stage of Spain and the middle Montezuman Stage of North America; (3) the middle Canglangpuan Stage approximates the lowermost Botoman Stage of the Siberian Platform, middle Banian Stage of Morocco, the uppermost Ovetian – lowermost Marianian stages of Spain and the upper Montezuman Stage of North America; (4) the uppermost Canglangpuan Stage is equivalent of the middle Toyonian Stage of the Siberian Platform, Archaeocyathus abacus beds in Australia, the middle Bilbilian Stage in Spain and the middle Dyeran Stage (Bolbolenellus euryparia Trilobite Zone) in North America. Copyright © Cambridge University Press 2015

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