In the mining field, Liang Minfu proposed an FBG inclination sensor to monitor the attitude of hydraulic support [20]; Tao Zhigang monitors coal and rock movement in real time based on a quasi ...
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One of the most critical is the implementation of the linkage of the coal mining machine, scraper conveyor, and hydraulic support [5] for the comprehensive mining face. Memory cutting, hydraulic ...
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A hydraulic support is one of the key pieces of equipment in a fully mechanized coal-mining face. The shaft is seriously worn due to repeated support shifting in coal-mining operations, and the hydraulic …
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Zeng Qingliang et al. 14 studied the impact response of the hinge of the support when the coal gangue particles impacted the hydraulic support in the process of top coal caving mining based on ...
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A hydraulic support is one of the key pieces of equipment in a fully mechanized coal-mining face. The shaft is seriously worn due to repeated support shifting in coal-mining operations, and the hydraulic support bears a large amount of impact load in the support process, leading to a threat to its dynamic stability. In order to study the …
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of coal mining and the lack of eective management tools have led to a high incidence of coal mine disasters. The coal mining face support is the primary condition for safe and ecient mining, and hydraulic supports are the core of the mechanised mining system []. Ideally, hydraulic supports 2 are arranged in a straight line at the mining face ...
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DOI: 10.1007/s11277-018-5294-4 Corpus ID: 52278069; The Research on Characteristics of Hydraulic Support Advancing Control System in Coal Mining Face @article{Cao2018TheRO, title={The Research on Characteristics of Hydraulic Support Advancing Control System in Coal Mining Face}, author={Lian Min Cao and Shi-jiao …
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Taking ZF5600/16.5/26 hydraulic support as an example, simulation software was used to study the influencing factors of coal release efficiency, and the most efficient coal release method was found …
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With the increase of mining height, the problem of coal wall spalling in the working face gradually worsens. Hydraulic support and its face guard structure are the key pieces of equipment to ...
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Hydraulic fracturing technology is widely used in the initial release of hard roofs on working faces, pressure relief of roadways under dynamic pressure, weakening of hard top coal, gas drainage, and other aspects of coal mining [1], [2].To ensure the effectiveness of hydraulic fracturing, segmented fracturing technology is usually used to …
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The dataset utilized in this study is the Underground Longwall Mining Face (DsLMF+) image dataset, comprising 138,004 images annotated with six classes: coal miner, hydraulic support guard plate, large coal, mine safety helmet, miner behaviors, and towline. The dataset incorporates diverse angles, scenes, and tasks, providing a …
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Pan Y.S., Xiao Y.H., Li G.Z., 2020b, Roadway hydraulic support for rockburst prevention in coal mine and its application, Journal of China Coal Society, 45, 1, 90-99 Show more Recommended publications
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Introduction. Hydraulic supports [1–10] are important equipment in mechanized coal mining systems [].It mainly supports the working face in the mine, cooperating with the shearer and scraper. The …
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With the increase of coal mining depth, hydraulic supports with large mining height and high working resistance are widely used, and the length of working face and the number of supports are ...
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A mathematical hydraulic support self-tracking model for three-machine cooperative mining is proposed to address low efficiency and difficulties in strategy evaluation of a fully mechanized coal face. The proposed model uses the coordinates and traction speed of the shearer to calculate the frequency of the circular hydraulic …
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Hydraulic support is an indispensable equipment for coal mining face. To detect the position and posture of the hydraulic support and automatically control its straightness at the mining working ...
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Under the environment of coal mine underground and coal control system safety limit, the hydraulic support electro control system generally uses the weak electricity voltage or the electro hydraulic signal, so the support controller outputs weak electrical signal, and the servo control system needs to connect power amplifier to …
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Key words: Moving velocity of hydraulic support; Rated flow; Hydraulic controlled check valve; AMESim 1 Tntroduction In the process of coal mining,the movement of hydraulic support needs in a ...
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According to the actual situation of the existing hydraulic support in Zhaogu No. 2 Mine, the hydraulic support model of the working face is ZF10000/22/32D. ... it can be seen that the pressure of ...
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In order to master the strength adaptability of super-large mining height hydraulic support, the paper presents a study of super-large height hydraulic support which is used in Jinjitan Colliery, China. The numerical model is established with 3D modeling software Pro/ Engineer and then analyzed by finite element analysis software ANSYS …
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As the core equipment for fully mechanized coal mining, hydraulic support can provide a safe working face, and to move the scraper conveyor and shearer in the working face 3. It can also reliably ...
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The hydraulic support is one of the most important equipments in the fully mechanized coal mining face. With the development of China's coal mining industry, the demand for the hydraulic support is increasing, and its performance requirements are also increasing. The hydraulic technology is the technical basis of the hydraulic support.
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The hydraulic support electro-hydraulic control system communication protocol was given based on discussing the system hardware architecture. ... The Communication Protocol Design of Electro-Hydraulic Control System for Hydraulic Supports at Coal Mine. In: Gong, Z., Luo, X., Chen, J., Lei, J., Wang, F.L. (eds) Web Information Systems …
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Hydraulic support is the main supporting equipment of the coal mining systems, and they are usually subjected to fatigue failure under the high dynamic load. The fracture positions are generally at welded joints where there is a serious stress concentration. In order to investigate and further improve the fatigue strength of …
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Offers up to 16in (400mm) of stable deformation for unmatched safety in coal mine roof support. 004 Transport & Handling. Specialized system bundling for optimized transport and handling. Improves haulage productivity up to 70% compared to comparable support capacity roof supports ... Compact mechanical steel prop that provides active roof ...
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The coupling relationship between the hydraulic support and the surrounding rocks in a mine was also analyzed from a stiffness …
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In addition, if the three hydraulic supports are not forwarded immediately after the coal-mining machine cuts the backfilling body, the tip-to-face dimension (i.e., the distance from the hydraulic support tip to the front coal wall) (see Fig. 1) will be relatively large. If the upper part of goaves caves in large scale at this point, the part ...
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School of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, Shandong, China; 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 …
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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 …
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Design and selection of hydraulic support is the core of coal mine fully mechanized mining equipment selection and matching, determine the hydraulic supporting strength Using the numerical simulation method and shallow buried depth of roof structure of theoretical calculation method, determines the necessary technical parameters such as …
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