土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (4): 542-548.

• 测试技术 • 上一篇    下一篇

深钻孔壁面局部应力解除法三维地应力测试设备设计

吴振君1，汤 华1，秦雨樵1,2，袁 晖1   

  1.  (1.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点试验室，武汉 430071；2.中国科学院大学，北京 100000)
  • 收稿日期:2019-09-29 修回日期:2019-10-22 出版日期:2020-08-20 发布日期:2020-08-16
  • 作者简介:吴振君（1977-），男，博士，副研究员，研究方向为岩土工程试验测试设备研发。
  • 基金资助:
    国家科技重大专项(2016ZX05034)

Design of In-situ 3D Ground Stress Measuring Apparatus for Deep Boreholes Using Wall Stress Relief Method

WU Zhenjun1, TANG Hua1, QIN Yuqiao1,2, YUAN Hui1   

  1. (1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071;2.University of Chinese Academy of Sciences, Beijing 100000)
  • Received:2019-09-29 Revised:2019-10-22 Online:2020-08-20 Published:2020-08-16

摘要： 页岩气开采与利用、常规油气资源开发、重大水利水电工程、深部采矿、地球科学基础研究等领域对深部地应力测量有强烈需求。钻孔壁面局部应力解除法适用于深钻孔地应力测量。在水平孔地应力测试设备BWSRMH01基础上设计了一套适用于深钻孔的三维地应力测试设备，可实现设备定位、孔壁应变传感器粘贴、孔壁应力解除及应变测量等功能，介绍了设备的测试原理、关键部件设计方案，最后简介了该设备的地应力测试流程。该设备的设计研发具有完全自主知识产权，目前设备耐压耐温性能达到1 200 m深钻孔的测试环境要求。

关键词: 深钻孔, 地应力, 钻孔局部壁面应力解除法, 测试设备, 设计, 高温高压

Abstract: The measurement of deep ground stress is widely applied in shale gas extraction, conventional oil and natural gas exploration, large hydroelectricity and irrigation projects, deep mining and fundamental earth science research areas. The borehole wall local stress relief method is suitable for the rock stress measurement at a great depth. This paper presents an improved three-dimensional deep rock stress measurement apparatus based on the existing ground stress measurement device, BWSRM-H01 in a horizontal borehole. The improved device can perform the locating, installation of the strain gauges at the borehole surface, relieving of the borehole surface and strain measurement. The design approach of key components of the device is introduced in this paper. The in-situ rock stress measuring procedure of the improved apparatus is also briefly presented. The design and development of the apparatus has the in-house owned intellectual property. Currently, the pressure and temperature resistance of the instrument is suitable for the measurement of 1 200 m deep borehole. 

Key words: Deep Borehole, Ground Stress, Borehole Wall Stress Relief Method (BWSRM), Testing Equipment, Design, High-Temperature and High-Pressure Environment

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