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(a) Plan layout, (b) cross-section of the vertical …

Download scientific diagram | (a) Plan layout, (b) cross-section of the vertical shaft (turan 2013). from publication: Lateral earth pressures acting on circular shafts considering soil-structure ...

VERTICAL Shaft, Turbine Type VAB - Gruppo Aturia

VERTICAL Shaft, Turbine Type VAB Vertical shaft, turbine type centrifugal fire pumps have submerged impellers contained in a series-bowl assembly at the bottom of a vertical shaft. The design is similar to pumps used extensively for industrial and municipal service. These pumps are FM Approved for discharging water from lakes,

Vertical Shaft Impact Sbm-HN Mining Machinery …

When designing the VSI6X Vertical Shaft Impact Crusher, SBM took full consideration of safety and reliability. The more stable and reliable dual-motor drive and automatic diluted oil lubrication are adopted and at the same time, the gunk and the maintenance platform is optimized to ensure the safety and reliability of the equipment operation.

Shaft Sinking - McConnell Dowell

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(PDF) Experimental Analysis of a Vertical Drop …

An experimental analysis of a vertical drop shaft with a sharp-edged horizontal intake section and a coaxial venting pipe is undertaken to obtain design criteria given the limited attention ...

On the analysis of vertical shafts in soft ground ...

shaft has a diameter of 0.15m and a height of 1.0m embedded in a thick cohesionless sand layer. The geometry of the modeled problem is shown in Figure 1. Figure 1. Model of an axisymmetric vertical shaft Due to the axisymmetry in loading and geometry, an axisymmetric model has been selected for the shaft analysis.

Energy and Environmental Profile of the U.S. Mining …

The shaft is the primary vertical channel through which people and ore are transported in and out of the mine. It may be desirable to sink a vertical shaft in barren wall rock at one end or to one side of the ore deposit to keep haulage and hoisting facilities clear of actual

Three-dimensional arching effect on vertical circular shafts

The lateral earth pressure of vertical circular shaft is investigated by using experimental test and a numerical analysis. A framework for determining the earth pressure distribution on the basis of both centrifuge model test and 2D FE analysis results is introduced. Through these studies, it is found that the lateral earth pressure acting on a vertical circular shaft considering arching ...

Vertical Shaft Bearings-China Vertical Shaft Bearings ...

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Construction Technique of Vertical Shafts Excavation …

The vertical shaft method combined with uplift pile anti uplift plate structure system technology can effectively utilize the space–time effect principle. The key is to adopt the skip excavation method to reduce the unloading amount above the tunnel at the same time, and combine the local anti-uplift structure system to reduce the unloading ...

(PDF) DESIGN OF DEEP VERTICAL CIRCULAR DIAPHRAGM …

support system. The dim ensions of the ring beam are 0.5m thick and 1.0m deep. The diaphragm wall and. ring beam are modelled as plate elem ent with Young's modulus of …

Effects of vertical shaft geometry on natural ventilation ...

A set of burning experiments were conducted to investigate the effect of vertical shaft geometry on natural ventilation in urban road tunnel fires. Results show that using vertical shafts to discharge smoke leads to a boundary layer separation near the right-angle connection of the shaft and the tunnel ceiling.

Vertical shaft collapse at the Jinchuan Nickel Mine, Gansu ...

In mining areas, vertical ventilating shafts are often threatened by ground movements induced by underground mining. In this paper, damage characteristics related to collapse of the vertical ventilating shaft at the No. 14 exploratory line in Jinchuan Nickel Mine, China are documented. The damage mechanism is then analyzed based on comprehensive …

Stability analysis of vertical shaft surrounding rock and ...

The Convergence Constraint method was applicated to the stability analysis of shaft supporting structure in Coal Mine.Through the investigation and numerical simulation methodit was calculated the ground reaction curves and longitudinal deformation profile by Hoek Brown criterion.Combined with the parameters of supporting structuraldrawing the support …

Large Vertical Circulating Water Pumps - Goulds Pumps

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Effects of vertical shaft arrangement on natural ...

In each case, the area of each shaft was the total area of shafts divided by the shaft amount. The shafts were evenly distributed in the region between the fire and the right end of the tunnel and numbered consecutively in the downstream direction of the fire (for example, the shafts in case with three shafts for natural ventilation were numbered as shaft 1, shaft 2 and shaft 3, …

Article Experimental Analysis of a Vertical Drop Shaft (2013)

BibTeX @MISC{Padulano13articleexperimental, author = {Roberta Padulano and O Carravetta}, title = {Article Experimental Analysis of a Vertical Drop Shaft}, year = {2013}}

Vertical Shaft Excavation Shaping and Surrounding Rock ...

The stability discrimination method of surrounding rock in vertical shaft construction and the safety technology of shaft construction under the geological condition of a super-thick crush belt were studied. Through the establishment of a shaft ...

Evaluation on the Stability of Vertical Mine Shafts below ...

established a system for monitoring the stability of vertical shafts by means of observation, through the arrangement of a number of on-site observation points. Liu et al. [22] ana-lyzed a number of factors affecting the stability of shafts and built a vertical shaft stability evaluation model in combi-nation with fuzzy clustering analysis theory.

Measurement of Additional Strains in Shaft Lining Using ...

The depth of these vertical shaft linings is commonly ranging from 400 to 1000 meters. When the fracture happened, the falling of broken concrete caused casualties and damage to equipments. According to the existing results, the mechanism …

Vertical Shaft Support Improvement Studies by Strata ...

The shaft lining failure which occurs in deep alluvium is a sudden coal mine hazard. The strata grouting is one of the treatment methods for the shaft lining failure. To investigate the impact of grout injection pressure on the shaft lining, the field measurement and the numerical analysis of the shaft lining stress variation during the grouting were conducted.

Overview on vertical and directional drilling technologies ...

The vertical and directional drilling are the key technologies for the exploration and exploitation of oil and gas resources in deep formations. Meanwhile, they are also the very important ways to exploit deep geothermal energy and geo-resources, conduct international continental scientific drilling program. The aim of the present overview is to review and discuss …