煤炭工程 ›› 2015, Vol. 47 ›› Issue (3): 58-60.doi: 10.11799/ce201503020

• 生产技术 • 上一篇    下一篇

薄煤层沿空留巷巷旁充填体参数的合理确定

李全战1,董关杰2,卢前明3   

  1. 1. 中国矿业大学(北京)
    2. 郑煤集团芦沟煤矿
    3. 中国矿业大学(北京)资源与安全工程学院
  • 收稿日期:2014-09-28 修回日期:2014-11-13 出版日期:2015-03-10 发布日期:2015-03-25
  • 通讯作者: 李全战 E-mail:524724592@qq.com

Determination of Rational Parameters for Roadside Backfill Body in Gob-Side Entry Retaining in Thin Coal Seam

  • Received:2014-09-28 Revised:2014-11-13 Online:2015-03-10 Published:2015-03-25

摘要: 摘 要:巷旁充填体的参数设计是沿空留巷围岩控制的关键,其中充填体强度及宽度是主要影响因素。本文以杨东矿为工程背景,通过理论计算得出最合理的充填混凝土强度等级为C20,采用FLAC3D数值模拟软件研究了不同充填体宽度下围岩变形规律,并确定最佳充填体宽度为1m。现场实践表明:采用该设计参数进行巷旁充填之后,顶底板及两帮移近量均在可控制范围内,验证了参数设计的合理性。

关键词: 关健词:薄煤层, 沿空留巷, 巷旁充填, 数值模拟

Abstract: Abstract: The parameters designation of roadside backfill body is the key to control surrounding rock in gob-side entry retaining. Among which strength and width of backfill body are the main influencing factors. Yangdong Mine is chosen as the analysis object in this paper,through theoretical calculation, the most reasonable strength grade of backfill concrete is determined to be C20. FLAC3D numerical simulation software is used to study the deformation law of surrounding rock in different width of backfill body, and the optimal width of backfill body is determined to be 1m. Field practice shows that the two-sided displacement and convergence between roof and floor are all in the controllable range after using this design parameters to build roadside backfill body, which verifies the rationality of the parameter designation.

Key words: Key words: thin coal seam, gob-side entry retaining, roadside backfill, numerical simulation

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