土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (2): 251-253.

• 测试技术 • 上一篇    下一篇

隧道炮孔钻进信息地质预报初探

蔡理平   

  1. （中国铁路广州局集团有限公司江门工程建设指挥部，广东江门 529101）
  • 收稿日期:2019-10-23 修回日期:2019-12-25 出版日期:2020-05-20 发布日期:2020-05-20
  • 作者简介:蔡理平（1986-），男，工程师，研究方向为铁路建设管理。
  • 基金资助:
    中国铁路广州局集团科研项目（2019K115）

Tunnel Geological Condition Forecast from the Blasting Borehole Drilling Information

CAI Liping   

  1. (Jiangmen Engineering Construction Headquarters, China Railway Guangzhou Group Co. Ltd., Jiangmeng 529101)
  • Received:2019-10-23 Revised:2019-12-25 Online:2020-05-20 Published:2020-05-20

摘要： 采用自研的炮孔钻进信息采集系统，记录钻进速度，在不同质量等级的围岩中开展钻进测试，对炮孔钻进地质预报在隧道掘进中的应用进行初步研究。测试结果表明钻进速率与岩体级别密切相关，钻进速度越快围岩的质量越差，钻进速度可作为判识岩体质量的关键指标。测试隧道的钻进速度变化幅度与岩体的节理裂隙发育情况密切相关，钻进速度的变化幅度越大与岩体节理裂隙越发育。

关键词: 地质预报, 炮孔钻进, 钻进速度, 岩体质量

Abstract: This paper presents a case history of using the blasting borehole drilling information to predict the geological conditions in rock mass with various rock qualities. This inhouse developed system records the penetration rate of the blasting borehole drilling in the tunnel excavation. The results indicate that the borehole drilling penetration rate is closely associated with the rock mass quality class and the higher rate relates to the poorer rock mass quality. Therefore, the borehole drilling penetration rate can be used as an index for determining the rock mass quality. The results also show that the change in the penetration rate might be related to the fissures in the rock mass. Higher penetration rate relates to the well-developed joints and fissures in the rock mass.

Key words: geological condition forecast, blasting borehole drilling, drilling penetration rate, rock mass quality

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