煤炭工程 ›› 2015, Vol. 47 ›› Issue (9): 43-45.doi: 10.11799/ce201509015

• 施工技术 • 上一篇    下一篇

基于塑性区分布的深部巷道支护技术研究

孙波   

  1. 中煤科工集团沈阳设计研究院有限公司
  • 收稿日期:2014-12-12 修回日期:2015-03-25 出版日期:2015-09-11 发布日期:2015-10-09
  • 通讯作者: 孙波 E-mail:smysunbo@126.com

Study on support technology of deep roadway based on distribution of plastic zone

  • Received:2014-12-12 Revised:2015-03-25 Online:2015-09-11 Published:2015-10-09

摘要: 应用弹塑性理论对深部不同侧压系数(λ)时圆形巷道围岩塑性区分布进行了研究,分析了巷道围岩塑性区分布的影响因素,研究表明:λ=1时,巷道围岩塑性区为圆形;λ≠1时,巷道围岩塑性区为椭圆形;塑性区范围与外载荷、侧压系数、岩石黏聚力及内摩擦角相关;λ>1时巷道支护应以控制顶底板为主,λ<1时巷道支护应以控制两帮为主。根据巷道围岩塑性区分布,研究了巷道锚杆、锚索长度设计参数,并进行了现场工业性试验,试验表明以控制深部巷道围岩塑性区的锚网支护技术能保证巷道稳定。

关键词: 侧压系数, 弹塑性理论, 塑性区分布, 锚杆支护

Abstract: Destruction of roadway surrounding rock is a key area of reinforcement, the plastic zone surrounding rocks of circular deep roadway was researched in the different side pressure coefficient(λ)by elastic-plastic theory, and the influence of plastic zone distribution of surrounding rock was analyzed. The results show that: λ=1, plastic zone of roadway surrounding rock was circular. λ≠1, plastic zone of roadway surrounding rock was ellipse. The plastic zone was related to the external load and side pressure coefficient and rock cohesion and internal friction angle. λ>1, roadway support should be to control the roof and floor mainly. λ<1, roadway support should be to control the side wall mainly. Based on the distribution of plastic zone surrounding rocks, the length of bolt and cable were designed, by the industrial experiment, shows that bolt support technology can guarantee the stability of deep roadway by control deep plastic zone in surrounding rock of the roadway.

Key words: Side pressure coefficient, Elastic-plastic theory, Plastic zone distribution, Bolt support

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