Results 21 to 30 of about 381,789 (309)
Research on the hydraulic support top beam based on dynamic load bearing
Frontiers in Earth Science, 2023 Introduction: Aiming at the problem of structural damage of top beam and column in the actual bearing process of top coal caving hydraulic support caused by uneven roof pressure in the process of fully mechanized caving mining in thick coal seam coal ...
Lianmin Cao +4 more
doaj +1 more source
Dynamic model analysis of hydraulic support [PDF]
Advances in Mechanical Engineering, 2019 In view of the shortcomings of traditional hydraulic support system, such as poor mobility and limited range of adjustment, a new configuration with double parallelogram structure is proposed. Combining the kinematic diagram of the mechanism of the new support system and the relevant parameters of the balance moment, using the kinematic vector closed ...
Enguang Guan +4 more
openaire +2 more sources
Applied Sciences, 2023 Solid backfilling is an environmentally friendly method of coal mining. Backfilling hydraulic supports are important devices in solid backfill mining. In order to speed up the design and manufacturing process of them, this paper proposes a method of hydraulic support reformation and evaluation. The mechanical models of top-coal caving hydraulic support
Qiang Zhang +4 more
openaire +2 more sources
Cooperative control technology of shear and hydraulic support on fully-mechanized coal mining face
Gong-kuang zidonghua, 2020 Aiming at low cooperative control efficiency of shearer and hydraulic support on fully-mechanized coal mining face, a cooperative control technology of shearer and hydraulic support on fully-mechanized coal mining face was proposed based on technologies ...
LIU Qing +3 more
doaj +1 more source
Overview of technologies for constructing the facilities at the Dniester pumped storage power station [PDF]
, 2019 Purpose. Perform an overview of the construction technologies and substantiate the effectiveness of the Ukrainian experience in building a pumped storage power station (PSPS) on the Dniester River in difficult engineering-geological conditions with the ...
Horbatiuk, Yu +4 more
core +1 more source
Research on the dynamic law of automatic following of hydraulic support
Gong-kuang zidonghua, 2023 Currently, research on the automatic following of hydraulic support in fully mechanized working faces focuses on controlling the movement of hydraulic support based on external environmental variables.
REN Huaiwei +5 more
doaj +1 more source
Improve the Xinanjiang model based on various hydrological model structures
Guan'gai paishui xuebao【Objective】 The Xinanjiang model is a hydrological model widely used for catchment modelling, but its accuracy depends on many factors. The objective of this paper is to present ways to improve the Xinanjiang model.
ZHANG Liping +5 more
doaj +1 more source
Gong-kuang zidonghua, 2023 The communication system is the channel and bridge for information transmission in the hydraulic support electro-hydraulic control system of the fully mechanized mining face. Currently, CAN bus is commonly used as the communication bus. It is susceptible
YANG Yongkai +7 more
doaj +1 more source
Foliar and wood traits covary along a vertical gradient within the crown of long-lived light-demanding species of the Congo Basin semi-deciduous forest [PDF]
, 2019 Plant functional traits have shown to be relevant predictors of forest functional responses to climate change. However, the trait-based approach to study plant performances and ecological strategies has mostly been focused on trait comparisons at the ...
Beeckman, Hans +8 more
core +2 more sources
Study on Fracture Behavior of Directly Covered Thick Hard Roof Based on Bearing Capacity of Supports
Applied Sciences, 2023 Mine pressure at the working face is severe due to it being directly covered by a thick hard roof. To further investigate the technology of controlling the mine pressure of a thick hard roof, the upper working face of 13,121 in Gubei mine of Huainan ...
Jiawen Li +4 more
doaj +1 more source