Some improvements of the marching cubes algorithm for the rendering of an orebody

Wei

et al. 2013

AMR

The influences of operating parameters (bed height, air flow rate, and separation time) on the separation effect for lump coal were experimentally studied. The results show that shallow bed takes less time to reach steady separation state comparing with the deep bed. Increasing separation time at low air flow rate and decreasing separation time at high air flow rate could improve the separation effect. Separation effect could get the optimal under the condensation of bed height at 90mm, air flow rate at 8m3/h and separation time at 60s.

Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Investigation of a Gas-Solid Fluidized Bed for Lump Coal Separation

Wei

et al. 2013

AMR

“…As the temperature difference of surrounding rock in the axis direction of tunnel is small, and the heat flux in this direction is close to zero, the surrounding rock temperature field is regarded as a two-dimensional unsteady temperature field. Concerning the unique and anomalous temperature changes in Gaoligong mountain region, the earth heat flux in this region takes the averaged value 100mW/m 2 , the elastic modulus E, the Poisson's Ratio µ , the coefficient of thermal conductivity λ changing with temperature, linear expansion coefficientα is referenced to the value of 25°C, and thermal conductivity coefficient takes 36 KJ/hr-m-C [8]. Calculation thermodynamic parameters of surrounding rock and lining are shown in Table 1 and Table 2…”

Section: ) Coefficient Of Thermal Expansionmentioning

confidence: 99%

A Study on Temperature Distribution of Surrounding Rock and Mechanical Characteristics of Lining of Monglian Tunnel under High Geothermal

Liang

2011

AMR

To solve design and construction problems of Monglian tunnel under high geothermal, based on the change rules of thermal parameters of surrounding rock and lining during excavation period, this paper analyzed the temperature distribution, heat transfer in tunnel and interaction between lining and surrounding rock, then by using numerical simulation, the relationship between temperature field and mechanical characteristics of lining and surrounding rock was discussed. Finally, the methods of using blast furnace cement, utilizing wet spraying concrete construction technology, and making surrounding rock exposure time as short as possible to reduce damages high temperature caused was proposed. The result can provide experience in similar tunnel design and construction.

“…And this situation is more serious in China. Large deformation disasters induced by deep mining appeared in roadway and workface, including high ground pressure, periodic weighting in a large range, roof fall and coal bump [1] . Many reasons could induce surrounding rock deformation.…”

Section: Introductionmentioning

confidence: 99%

Study on Characteristic and Mechanism of Deformation and Failure of Roadway Surrounding Rock in Deep Mining

Wang

et al. 2013

AMR

In order to study the mechanics of the deformation of the wall rock, the right roadway in Chengshan mining field, Jixi Mine was chosen to determine the physical property, micro-structure, ingredients, clay and the inner-relationships between these properties using scanning electron microscope (SEM) and theoretical analysis. For further understanding the deformation mechanics within the wall rock, hollow inclusion stress release method was used. At the end, mechanism of the wall rock in the deep was established and corresponding deformation control technology was discussed by numerical simulation.