Results 221 to 230 of about 330,134 (260)

Optimal design of hydraulic support

Structural and Multidisciplinary Optimization, 2000
This paper describes a procedure for optimal determination of two groups of parameters of a hydraulic support employed in the mining industry. The procedure is based on mathematical programming methods. In the first step, the optimal values of some parameters of the leading four-bar mechanism are found in order to ensure the desired motion of the ...
M. Oblak, B. Harl, B. Butinar
openaire   +1 more source

Variant Design of Hydraulic Support

Advanced Materials Research, 2012
As is known to all, new mechanical product design is always on the basis of the original product, so to better use the exiting design resource, a mechanical product variant design method is presented. The new method is based on SML and parameter CAD.
Yuan Yuan Shao, Qing Liang Zeng, Guan Tao Xuan, Xian Xi Liu   +3 more
openaire   +1 more source

Lightweight Design for Hydraulic Support

Key Engineering Materials, 2010
In large inclined angle mining condition, in order to decrease the effect of sliding force, a lightweight design for hydraulic support is presented in this paper. Taking minimum mass of top beam as optimization objective, the three-dimensional model of it is built firstly.
Xin Zhang, Jian Wu Zhang, Qing Liang Zeng, Cheng Long Wang   +3 more
openaire   +1 more source

Finite Element Analysis for Hydraulic Support

Advanced Materials Research, 2012
The paper was mainly research on hydraulic support by finite elements method. It took a certainly type of hydraulic powered support as an example. All parts of hydraulic support were analyzed in finite element analysis software Ansys Workbench12.1. The simulation data was compared with test data and the relative error factor was discussed, it indicated
Pei Dong Wu, Jian Yi Kong, You Jin Gao, He Gen Xiong   +3 more
openaire   +1 more source

Microprocessor-controlled hydraulic supports

Electronics and Power, 1985
Until recently the problems involved in co-ordinating the movement of the all-important roof supports in mining were strictly limited by existing hydraulic control. This article describes how the microprocessor has increased the flexibility, efficiency and safety of operation in the hazardous environment of the ...
openaire   +1 more source

Opened Performance of Hydraulic Support Electro-Hydraulic Valve Test Bench Design

Advanced Materials Research, 2013
A new performance test system is presented in this paper, as we all known, hydraulic support is the most important equipment in mechanized coal mining. Electric hydraulic valve, as the key components, consist of electromagnetic pilot valve and mechanical valve bodies. When electromagnetic pilot valve hasnt enough driving force, precursor core wont work
Xi Zhang, Yan Yan Wang, Ya Bin Cui, Miao Yu, Zhi Min Zhao   +4 more
openaire   +1 more source

Hydraulic Fills to Support Structural Loads

Journal of the Soil Mechanics and Foundations Division, 1970
Data are compiled based upon a review of the literature, concerning the relative density, penetration resistance, compressibility and rate of consolidation. Only hydraulic fills placed by sluicing through pipes are considered, and emphasis is upon performance under ordinary dead and live loads. Fills are classified according to the nature of the borrow
openaire   +1 more source

Hydraulic Support Equipment in Space Exploration

SAE Technical Paper Series, 1962
<div class="htmlview paragraph">With support equipment now being needed in space operation, a radical change is being made to the support industry. This paper describes these changes in respect to hydraulic support equipment for space applications.
openaire   +1 more source

Horizontal roof gap of backfill hydraulic support

Journal of Central South University, 2015
For the backfill hydraulic support as the key equipment for achieving integration of backfilling and coal mining simultaneously in the practical process, its characteristics will directly influence the backfill body’s compression ratio. Horizontal roof gap, as a key parameter of backfilling characteristics, may impact the backfilling effect from the ...
Qiang Zhang, Ji-xiong Zhang, Yang Tai, Kun Fang, Wei Yin   +4 more
openaire   +1 more source

Hydraulic unit prediction using support vector machine

Journal of Petroleum Science and Engineering, 2013
Abstract Hydraulic Flow Units or hydraulic units (HUs) concept is becoming popular for grouping reservoir rocks of similar petrophysical properties with the main goal of having a better estimate of permeability. HU approach has an advantage that it addresses the development of permeability in reservoir rocks from fundamentals of geology and physics ...
Syed Shujath Ali, Syed Nizamuddin, Abdulazeez Abdulraheem, Md. Rafiul Hassan, M. Enamul Hossain   +4 more
openaire   +1 more source