Volume 50 Issue 8
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GUO Xinwei. Research on dynamic features of hydraulic system for fully mechanized mining support and its improvement design[J]. Journal of Mine Automation，2024，50（8）：20-29.  doi: 10.13272/j.issn.1671-251x.2024060046
Citation: GUO Xinwei. Research on dynamic features of hydraulic system for fully mechanized mining support and its improvement design[J]. Journal of Mine Automation，2024，50（8）：20-29.  doi: 10.13272/j.issn.1671-251x.2024060046
shu

Research on dynamic features of hydraulic system for fully mechanized mining support and its improvement design

doi: 10.13272/j.issn.1671-251x.2024060046

  • Beijing Tianma Intelligent Control Technology Co., Ltd., Beijing 101399, China

  • Received Date: 2024-06-13
  • Rev Recd Date: 2024-08-13
    • Available Online: 2024-08-22
    Abstract
  • In the hydraulic support work of fully mechanized working face, there are often problems such as insufficient initial support force and slow moving speed of the support. Currently, most solutions are based on the steady-state operation law of the hydraulic system of the support, such as increasing the flow rate of the pump station and reducing pressure loss. There is relatively little research on the dynamic features of the hydraulic system. The dynamic equation of the hydraulic system for the fully mechanized mining support is established. The dynamic features of the hydraulic system related to the initial support force and moving speed of the support, as well as the hydraulic impact features of the emulsion pipeline system, are theoretically analyzed. It is found that the approximate no-load operation of the column or jack and the hydraulic impact of long-distance pipelines are the main reasons for the significant pressure drop and fluctuation in the hydraulic system of the support. The mechanism of hydraulic impact in the hydraulic system of the bracket is revealed to be the sudden opening and closing of the electro-hydraulic directional valve and the pressure of the column touching the top. The correctness of the theoretical analysis is verified through on-site measured data and AMESim simulation. An improvement plan for the hydraulic system of the fully mechanized mining support is proposed. It includes the installation of multiple accumulators on the support, the addition of hydraulic control one-way valves and electro-hydraulic directional valves to control the charging and discharging methods of the hydraulic system accumulators at different stages of frame movement. The method uses the instantaneous high flow features of the accumulators and the overpressure generated by the peak hydraulic impact pressure of long-distance pipelines to enhance the initial support force of the support. The simulation results show that the improved system can effectively increase the initial support force and frame moving speed of the hydraulic support.

     

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    • References(21)
  • [1]
    王国法,庞义辉. 液压支架与围岩耦合关系及应用[J]. 煤炭学报,2015,40(1):30-34.

    WANG Guofa,PANG Yihui. Relationship between hydraulic support and surrounding rock coupling and its application[J]. Journal of China Coal Society,2015,40(1):30-34.
    [2]
    王国法. 工作面支护与液压支架技术理论体系[J]. 煤炭学报,2014,39(8):1593-1601.

    WANG Guofa. Theory system of working face support system and hydraulic roof support technology[J]. Journal of China Coal Society,2014,39(8):1593-1601.
    [3]
    徐亚军,王国法. 液压支架群组支护原理与承载特性[J]. 岩石力学与工程学报,2017,36(增刊1):3367-3373.

    XU Yajun,WANG Guofa. Supporting principle and bearing characteristics of hydraulic powered roof support groups[J]. Chinese Journal of Rock Mechanics and Engineering,2017,36(S1):3367-3373.
    [4]
    李恒,康天合,李晓坡,等. 大采高综采支架初撑力对煤壁稳定性的影响研究[J]. 煤炭科学技术,2016,44(9):67-71,92.

    LI Heng,KANG Tianhe,LI Xiaopo,et al. Study on setting load of powered support in high cutting fully-mechanized coal mining face affected to coal wall stability[J]. Coal Science and Technology,2016,44(9):67-71,92.
    [5]
    阎建华. 综采工作面支架初撑力与围岩相互作用关系分析[J]. 煤炭科学技术,2014,42(4):12-15.

    YAN Jianhua. Analysis on interaction relationship between initial support load of powered support and surrounding rock in fully-mechanized coal mining face[J]. Coal Science and Technology,2014,42(4):12-15.
    [6]
    钱鸣高,石平五,许家林. 矿山压力与岩层控制[M]. 北京:煤炭工业出版社,2003:84-90.

    QIAN Minggao,SHI Pingwu,XU Jialin. Ground pressure and strata control[M]. Beijing:China Coal Industry Publishing House,2003:84-90.
    [7]
    史帆. 综放液压支架选型及工作阻力确定[J]. 机械管理开发,2022,37(10):112-113.

    SHI Fan. Selection of hydraulic supports for heaving and determination of working resistance[J]. Mechanical Management and Development,2022,37(10):112-113.
    [8]
    刘前进,徐刚,卢振龙,等. 液压支架工况综合评价与预警模型研究及应用[J]. 煤炭科学技术,2022,50(10):198-206.

    LIU Qianjin,XU Gang,LU Zhenlong,et al. Research and application of comprehensive evaluation and early warning model of hydraulic support working condition based on working resistance analysis[J]. Coal Science and Technology,2022,50(10):198-206.
    [9]
    徐刚,张春会,蔺星宇,等. 基于分区支承力学模型的综放工作面顶板矿压演化与压架预测[J]. 煤炭学报,2022,47(10):3622-3633.

    XU Gang,ZHANG Chunhui,LIN Xingyu,et al. Predicting ground pressure evolution and support crushing of fully mechanized top coal caving face based on zoning support mechanical model[J]. Journal of China Coal Society,2022,47(10):3622-3633.
    [10]
    李然. 矿用高压大流量乳化液泵站应用现状及发展趋势[J]. 煤炭科学技术,2015,43(7):93-96.

    LI Ran. Current status of application and development trend of mining high-pressure and large-flow-rate emulsion pump station[J]. Coal Science and Technology,2015,43(7):93-96.
    [11]
    胡红伟. 大采高工作面液压支架初撑力实测及分析[J]. 能源与节能,2015(7):99-101.

    HU Hongwei. On the practical first support force measurement and analysis of hydraulic support in mining face with large height[J]. Energy and Energy Conservation,2015(7):99-101.
    [12]
    张德生,谭震,朱信龙,等. 分布式供液模式下液压支架快速推移控制技术研究[J]. 矿山机械,2022,50(12):1-6. doi: 10.3969/j.issn.1001-3954.2022.12.001

    ZHANG Desheng,TAN Zhen,ZHU Xinlong,et al. Research on control technology for rapid movement of hydraulic support in distributed liquid supply mode[J]. Mining & Processing Equipment,2022,50(12):1-6. doi: 10.3969/j.issn.1001-3954.2022.12.001
    [13]
    李宇琛,吴娟,郭凯宇,等. 综采面不同供液方式的压力损失分析[J]. 机床与液压,2022,50(12):131-136. doi: 10.3969/j.issn.1001-3881.2022.12.025

    LI Yuchen,WU Juan,GUO Kaiyu,et al. Analysis on pressure loss of different liquid supply modes in fully mechanized face[J]. Machine Tool & Hydraulics,2022,50(12):131-136. doi: 10.3969/j.issn.1001-3881.2022.12.025
    [14]
    杨阳,沈宏明,赵忠辉. 蓄能器在液压支架立柱动载过载试验系统中应用的研究[J]. 煤矿机械,2015,36(3):206-207.

    YANG Yang,SHEN Hongming,ZHAO Zhonghui. Research of accumulator in hydraulic support column impact testing system[J]. Coal Mine Machinery,2015,36(3):206-207.
    [15]
    车鹏,吴勇,赵玉贝,等. 液压支架供液方式压力损失分析[J]. 液压气动与密封,2013,33(7):69-72. doi: 10.3969/j.issn.1008-0813.2013.07.025

    CHE Peng,WU Yong,ZHAO Yubei,et al. Pressure loss analysis of hydraulic support different feed liquid manner[J]. Hydraulics Pneumatics & Seals,2013,33(7):69-72. doi: 10.3969/j.issn.1008-0813.2013.07.025
    [16]
    方中喜. 液压支架立柱自动增压阀的仿真与试验[J]. 煤矿机械,2022,43(7):45-47.

    FANG Zhongxi. Simulation and test of automatic pressurization valve for hydraulic support column[J]. Coal Mine Machinery,2022,43(7):45-47.
    [17]
    曹连民,郭震,仲崇涛,等. 液压支架初撑力手动增压装置设计与应用[J]. 工矿自动化,2017,43(6):10-14.

    CAO Lianmin,GUO Zhen,ZHONG Chongtao,et al. Design and application of manual pressurization device for initial support force of hydraulic support[J]. Industry and Mine Automation,2017,43(6):10-14.
    [18]
    常宝瑞. 液压支架液压系统的优化设计[J]. 机电工程技术,2019,48(12):199-201. doi: 10.3969/j.issn.1009-9492.2019.12.065

    CHANG Baorui. Optimum design of hydraulic system of hydraulic support[J]. Mechanical & Electrical Engineering Technology,2019,48(12):199-201. doi: 10.3969/j.issn.1009-9492.2019.12.065
    [19]
    王成宾,权龙. 大惯量负载液压冲击的主动变阻尼抑制方法[J]. 机械工程学报,2014,50(8):182-188. doi: 10.3901/JME.2014.08.182

    WANG Chengbin,QUAN Long. Methods of restrain the hydraulic impact with active adjusting the variable damping in system with large inertia load[J]. Journal of Mechanical Engineering,2014,50(8):182-188. doi: 10.3901/JME.2014.08.182
    [20]
    陆春月,寇子明,吴娟,等. 液压波动激励下的充液管道动力学特性[J]. 华中科技大学学报(自然科学版),2013,41(5):17-22.

    LU Chunyue,KOU Ziming,WU Juan,et al. Dynamic characteristics of pipes conveying fluid excited by hydraulic fluctuation[J]. Journal of Huazhong University of Science and Technology(Natural Science Edition),2013,41(5):17-22.
    [21]
    刘占,孟兰蔚. 流体力学[M]. 北京:科学出版社,2017:130-131.

    LIU Zhan,MENG Lanwei. Hydrodynamics[M]. Beijing:Science Press,2017:130-131.
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