煤炭工程 ›› 2015, Vol. 47 ›› Issue (9): 39-42.doi: 10.11799/ce201509014

• 施工技术 • 上一篇    下一篇

富含水岩层斜井塑性区分布规律与变形控制研究

王丹,王渭明,宗永宏   

  1. 山东科技大学土木建筑学院
  • 收稿日期:2014-12-02 修回日期:2015-02-05 出版日期:2015-09-11 发布日期:2015-10-09
  • 通讯作者: 王丹 E-mail:492020719@qq.com

Study on Deformation Control and the Plastic Zone of Inclined Shaft in Water-rich Strata

  • Received:2014-12-02 Revised:2015-02-05 Online:2015-09-11 Published:2015-10-09

摘要: 针对深埋破碎、富含水岩层中井筒关键部位破坏特点,提出了塑性区半径理论-经验修正公式,通过与实测塑性区范围对比,结合数值模拟研究了基于富含水岩层内粘聚力为零时,在不同内摩擦角条件下围岩塑性区变化,提出了“锚杆注浆+锚网喷+薄弱处锚索补强+U型钢支护+反底拱混凝土”联合锚杆的支护对策。经现场证明:井筒拱顶下沉、两帮收敛值及底鼓量分别减少了7.9mm、5mm、2mm,围岩塑性区控制在1.8m范围内,确保了支护体系的整体支护能力,保证了斜井施工安全。

关键词: 富含水, 塑性区, 破坏机理, 支护对策, 数值模拟

Abstract: According to the breakage of shaft,the empirical and the therory formula was put forward and studied the change of plastic zone when the is zero in water-rich strata and proposed the reinforcement.Through the local practice,the settlement of vault reduced to 7.9mm,the convergence of sides reduced to 5mm,the floor heave reduced to 2mm and the plastic zone is 1.8mm.The reinforcement can ensure the safty of the construction of shaft

Key words: warter-rich, plastic zone, failure mechanism, supporting measure, numerical simulation

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