Horizontal roof gap of backfill hydraulic support

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• 作者：Qiang Zhang ; Ji-xiong Zhang ; Yang Tai …
• 关键词：horizontal roof gap ; backfill hydraulic support ; support height ; suspension height ; suspension angle ; tamping angle
• 刊名：Journal of Central South University
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：22
• 期：9
• 页码：3544-3555
• 全文大小：2,043 KB
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  [24]JUAREZ-FERRERAS, I, GONZALEZ-NICIEZA, C, MENENDEZDIAZ, A, áLVAREZ-VIGIL A E, áLVAREZ-FERNANDEZM I. Forensic
• 作者单位：Qiang Zhang (1)
  Ji-xiong Zhang (1)
  Yang Tai (1)
  Kun Fang (1)
  Wei Yin (1)
  
  1. Key Laboratory of Deep Coal Resource Mining of Ministry of Education of China, School of Mines, China University of Mining & Technology, Xuzhou, 221116, China
  
• 刊物类别：Engineering
• 刊物主题：Engineering, general
  Metallic Materials
  Chinese Library of Science
  
• 出版者：Central South University, co-published with Springer
• ISSN：2227-5223

文摘

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 aspects of control of roof subsidence in advance, support stress, backfilling process and the support design. Firstly, the reason why horizontal roof gap exists was analyzed and its definition, causes and connotation were introduced, then adopting the Pro/E 3D simulation software, three typical 3D entity models of backfill hydraulic supports were built, based on the influence of horizontal roof gap on backfilling effect, and influence rules of four factors, i.e. support height, suspension height, suspension angle and tamping angle, were emphatically analyzed on horizontal roof gap. The results indicate that, the four factors all have significant impacts on horizontal roof gap, but show differences in influence trend and degree, showing negative linear correlation, positive linear correlation, positive semi-parabolic correlation and negative semi-parabolic correlation, respectively. Four legs type is the most adaptive to the four factors, while six legs (II) type has the poorest adaptability, and the horizontal roof gap is small under large support height, small suspension height, small suspension angle and large tamping angle situation. By means of optimizing structure components and their positional relation and suspension height of backfill scrape conveyor in the process of support design and through controlling working face deployment, roof subsidence in advance, mining height and backfilling during engineering application, the horizontal roof gap is optimized. The research results can be served as theoretical basis for support design and guidance for backfill support to have better performance in backfilling. Keywords horizontal roof gap backfill hydraulic support support height suspension height suspension angle tamping angle