Research on electro-hydraulic control system for hydraulic support at coal mine

Yue-sen, YU; Dai, Peng; Xu, Yajun; Peng, Liming; Wu, Xiaojie

doi:10.1016/j.proeps.2009.09.239

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…It is vital to carry out an economic analysis of the effective protection of the powered roof support together with all machines of the longwall complex. In the past, several studies on the automation of the entire mining process were conducted [50][51][52][53][54]. The selection of a safety valve for the hydraulic system of the leg of the powered roof support working in the conditions where tremors often occur is key as it affects the safety of machines and people [55,56].…”

Section: Introductionmentioning

confidence: 99%

A Step-by-Step Procedure for Tests and Assessment of the Automatic Operation of a Powered Roof Support

et al. 2021

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A powered longwall mining system comprises three basic machines: a shearer, a scraper (longwall) conveyor, and a powered roof support. The powered roof support as a component of a longwall complex has two functions. It protects the working from roof rocks that fall to the area where the machines and people work and transports the machines and devices in the longwall as the mining operation proceeds further into the seam by means of hydraulic actuators that are adequately connected to the powered support. The actuators are controlled by a hydraulic or electro-hydraulic system. The tests and analyses presented in the developed procedure are oriented towards the possibility of introducing automatic control, without the participation of an operator. This is important for the exploitation of seams that are deposited at great depths. The primary objective was to develop a comprehensive methodology for testing and evaluating the possibility of using the system under operating conditions. The conclusions based on the analysis presented are a valuable source of information for the designers in terms of increasing the efficiency of the operation of the system and improving occupational safety. The authors have proposed a procedure for testing and evaluation to introduce an automatic control system into the operating conditions. The procedure combines four areas. Tests and analyses were carried out in order to determine the extent to which the system could be potentially used in the future. The presented solution includes certification and executive documentation.

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Section: Introductionmentioning

confidence: 99%

A Step-by-Step Procedure for Tests and Assessment of the Automatic Operation of a Powered Roof Support

et al. 2021

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“…The FAD1000/50 produced by Zhengzhou Coal Mining Machinery Group Co.(ZMJ),Ltd is already used which current capacity has achieved 1000L/min, absorbing domestic and international advanced technique, FAD3000/50 is developed that is a high water-based large current capacity safety valve [1,2]. The designed current is 3000L/min and the accent presses scope is 33~55Mpa.the merits are compacting structure, large current capacity, high working pressure, well sealing property and so on which can satisfy the hydraulic support request.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics Analysis of High Water-Based Large Flow Safety Valve

Zhang

Su³

et al. 2011

AMR

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The FAD3000/50 safety valve is researched that is newly developed by Zhengzhou Coal Mining Machinery Group Co.,Ltd with high water-based pressure ultra great current capacity. The mathematical model is fistly established according to the study of its structure and the practical system on hydraulic support. The simulation computation has carried under the MATLAB software, and this simulation model has confirmed through the test result. After a comparison of multiple sets of simulation results, the influence of primary structure parameter’s change in safety valve to dynamic characteristics is gived.

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