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Testing method for determining modulus ratio and strength ratio of jointed rock mass through drill energy

A technology of jointed rock mass and strength ratio, which is applied in surveying, earthwork drilling, wellbore/well components, etc., can solve problems such as differences in mechanical properties of jointed rock mass, save survey costs, high calculation accuracy, and simple calculation process. Effect

Active Publication Date: 2020-05-29
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of in-situ test method that utilizes rock drilling to determine the modulus ratio and strength ratio of join

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  • Testing method for determining modulus ratio and strength ratio of jointed rock mass through drill energy
  • Testing method for determining modulus ratio and strength ratio of jointed rock mass through drill energy
  • Testing method for determining modulus ratio and strength ratio of jointed rock mass through drill energy

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Embodiment

[0058] This embodiment takes the drilling test of the traffic tunnel of the Daheba Hydropower Station on the Han River in China as an example:

[0059] (1) Traffic tunnel engineering background and drilling test equipment of Hanjiang Daheba Hydropower Station in China

[0060] The traffic tunnel is located under the right bank of the Daheba Hydropower Station on the Hanjiang River in China, on a steep slope with good stability and good geological conditions, with a slope of 45-52°. The morphology of the area is mainly high mountains and deep valleys, with steep sides, and the surrounding rocks are mainly composed of gray Silurian marble and crystalline limestone. Drilling tests were carried out along the tunnel route (approximately 0-25m) from the entrance section to the first fault, and in the test area, there were weak areas, including broken pieces, joints, and broken and broken pieces.

[0061]The main engineering equipment is the drilling process monitoring equipment DPM...

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Abstract

The invention discloses an in-situ testing method for determining the modulus ratio and the strength ratio of a jointed rock mass through drill energy. The in-situ testing method is particularly implemented according to the following steps that 1, the torque, the drill pressure, the rotation speed and the drill speed are acquired through while-drilling monitoring equipment on the field, and the drill energy of the jointed rock mass is calculated; 2, normalization processing is conducted on the drill energy, acquired in the step 1, of the jointed rock mass; 3, the discontinuous frequency of thejointed rock mass is calculated; and 4, the modulus ratio and the strength ratio of the jointed rock mass are calculated. According to the in-situ testing method for determining the modulus ratio andthe strength ratio of the jointed rock mass through the drill energy, the problem that in the prior art, the mechanical property of the jointed rock mass and an indoor testing result have the great difference is solved.

Description

technical field [0001] The invention belongs to the technical field of in-situ testing of geotechnical engineering, and in particular relates to an in-situ testing method capable of determining the modulus ratio and strength ratio of jointed rock mass by using a rock drill. Background technique [0002] For the design of underground structures in rocks such as nuclear waste storage spaces, oil and gas storage systems, and water transfer tunnels, it is of great significance to reliably determine the mechanical properties of jointed rock masses, such as strength ratio and modulus ratio. Typically, laboratories using small jointed samples cannot accurately determine the strength and modulus ratios of jointed rock due to size regularity, discontinuities, and inhomogeneities in the jointed rock mass, and it is difficult to avoid trial and error throughout the process. Due to the influence of human factors such as sample disturbance, the mechanical properties of jointed rock mass ...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/00
CPCE21B49/003E21B47/00
Inventor 何明明庞帆刘毅王滈藤杨贝贝张志强李宁陈蕴生
Owner XIAN UNIV OF TECH