煤炭工程 ›› 2017, Vol. 49 ›› Issue (10): 119-121.doi: 10.11799/ce201710031

• 研究探讨 • 上一篇    下一篇

密实充填面双沿空留巷矿压及围岩变形规律研究

曲华,高琳   

  1. 山东科技大学
  • 收稿日期:2016-10-08 修回日期:2016-11-22 出版日期:2017-10-25 发布日期:2018-03-22
  • 通讯作者: 高琳 E-mail:21703785@qq.com

Study on the law of the rock pressure and roadway deformation of the double gob-side entry retaining of the compacted filling surface

  • Received:2016-10-08 Revised:2016-11-22 Online:2017-10-25 Published:2018-03-22

摘要: 为探明双沿空留巷密实充填工作面的巷道及覆岩运动及应力的演化规律,对充填体工作面超前支承应力显现及沿空留巷围岩变形进行了现场实测和数据分析。研究表明:相较于垮落法,充填工作面超前支承应力影响范围明显减小,矿山压力显现较弱;充填体内部应力变化分为初始应力区、应力增高区和应力平稳区,与采空区顶板运动的小变形区、剧烈变形区、变形稳定区相对应;沿空留巷围岩变形较显著,前期顶底板变形量大于两帮变形,应加强顶板支护,后期围岩稳定后的移近速度仍大于2.4mm/d,仍需定期维护。

Abstract: In order to explore the evolution law of the movement and stress of the roadway and the overlying strata of the dense filling working face with the double edge of the goal,the stress of working face and the deformation of surrounding rock of filling mining were measured and analyzed . Research shows that: compared with caving method, advance support stress concentration coefficient and the influence scope was significantly reduced in filling mining, mine pressure appeared weak; filling body stress changes into the initial stress area, the stress increasing zone and stress stable zone, which correspondence with the the small deformation zone, the goaf roof movement violently deformation, and stability deformation zone of roof movement in goaf; the gob-side entry retaining deformation significantly, the deformation of the top floor is more than roadway's sides in the early stage, should strengthen the roof support, nearly the speed shift after the stability of surrounding rock is still greater than 2.4mm/d, the late need to strengthen the maintenance.

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