Yunnan Ya rong Mining Technology Co.

Kunming, China

Yunnan Ya rong Mining Technology Co.

Kunming, China
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Yang Z.,Kunming University of Science and Technology | Hou K.,Kunming University of Science and Technology | Cheng Y.,Yunnan Ya rong Mining Technology Co. | Chen F.,Kunmning Engineering & Research Institute of Nonferrous Metallurgy Co. | Kang Y.,Kunming Metallurgy Research Institute
Modern Tunnelling Technology | Year: 2014

At present it is a blank for a theoretical calculation formula for diffusion radius of Bingham fluid based on column penetration grouting both at home and abroad. In this paper, a theory formula in this regard was deduced according to rheological equation and seepage motion equation of Bingham fluid. The influences of Bingham fluid rheological behavior, grouting pressure, groundwater pressure and water temperature of prepared grout on diffusion radius based on column penetration grouting are theoretically analyzed and then verified by grouting test. Results show that though there is 30% differences between calculated theoretical values and measured values in grouting tests, they are still within the range of acceptable errors. Therefore, the research findings provide theoretical support and play a guiding role in the process of grouting. ©, 2015, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Yang Z.,Kunming University of Science and Technology | Niu X.,Kunming University of Science and Technology | Hou K.,Kunming University of Science and Technology | Zhou Z.,Kunming University of Science and Technology | And 5 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2015

The rheological parameters of cement grouts obeying power-law are time-dependent, which have significant influence on grouting effects in practical projects. Rheological and seepage equations for power-law cement grouts with time dependent rheological parameters were established through theoretical analysis and experiments. The mechanism of the columnar diffusion of grouts was analysed. The scope of the applicability, the method to determine the parameters and the basis of designing the side grouting hole on the grouting pipe were analyzed respectively and were validated by means of indoor grouting experiments. The equivalent radius of transverse diffusion from the measurement in the indoor grouting experiments had differences about 20%-30% to the calculated values with the proposed equation. ©, 2015, Academia Sinica. All right reserved.


Yang Z.,Kunming University of Science and Technology | Hou K.,Kunming University of Science and Technology | Cheng Y.,Yunnan Ya rong Mining Technology Co. | Yang B.,Yunnan Ya rong Mining Technology Co.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2014

Grouting method is a common way to the engineering practices, grouting diffusion mechanism is the key factor which make it applied successfully in engineering. Carrying out theoretical analysis and experimental researches, diffusion radius of hemispheroid and diffusion length belongs to cylinder of column-hemispherical penetration grouting mechanism based on power-law fluid are deduced, at the same time the scope of application and method to determine the parameters are analyzed respectively. Then they were validated by means of designing indoor grouting experiments. Experiment results show that diffusion radius of hemispheroid, diffusion length belongs to cylinder of actual measurement values in the indoor grouting experiments have about 30%-35% differences with that of theoretical values calculated by column-hemispherical penetration grouting mechanism based on power-law fluid, but they are all within the acceptable error limits. Because the international and domestic researches on them were seldom reported, therefore, research achievements may not only can provide strong theoretical basis for perfecting the penetration grouting mechanism, but also play a reference guiding role for the theoretical research, design and construction on grouting technique. ©, 2014, Academia Sinica. All right reserved.


Yang Z.-Q.,Kunming University of Science and Technology | Niu X.-D.,Kunming University of Science and Technology | Hou K.-P.,Kunming University of Science and Technology | Zhou Z.-H.,Kunming University of Science and Technology | And 4 more authors.
Yantu Lixue/Rock and Soil Mechanics | Year: 2015

Based on grouting simulation experiments and numerical analyses, the formulations are established for predicting grouting amount, grout diffusion radius and compressive strength of stone body in the gravel soil; the proposed formulations are validated by indoor grouting experiments. Experimental results show that there are about 10%, 5% and 10% differences respectively between the theoretical values of grouting amount, grout diffusion radius and compressive strength of stone body and their actual measurement values; but these differences valuse are admitted. So, the formulation can be used to predict grouting amount, grout diffusion radius and compressive strength of stone body in actual grouting engineering of gravel soil. Therefore, the research results may not only provide theoretical supports for actual grouting engineering of gravel soil, but also provide technical references for disaster prevention and mitigation of landslide and debris flow induced in the gravel soil. ©, 2015, Academia Sinica. All right reserved.

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