DEVICE FOR TESTING DISCONTINUOUS PLANE IN ROCK

Japanese Patent JP3666799

B2

PROBLEM TO BE SOLVED: To provide a test device capable of accurately determining the dynamical property of a discontinuous plane in bedrock reflecting the distortion property of underground cavern bedrock deeply existing as well as constant of normal stress (CNL) and constant of normal displacement (CND).
SOLUTION: The device for testing the discontinuous plane on a rock includes an upper box 2 in which an object 3 with the discontinuous plane for shearing test is caught and a lower box being moved on the upper box 2, horizontally applies the shearing force onto the lower box along the object with the discontinuous plane for shearing test while applying the normal stress onto the object 3 for shearing, and automatically controls the normal stress in accordance with the normal displacement of the object for shearing test. The variation ΔN of the normal stress is determined for the variation Δu of the normal displacement of the sheared object for shearing test such as the following: ΔN=kn.Δu, i.e., ΔN={E/(1+v)r}Δu, where E is distortion coefficient of the surrounding bedrock, and v is Poisson's ratio, and r is affected range.

JP2773355	[Title of Invention] Control device for material testing machine
WO/2020/151091	TEST DEVICE AND METHOD FOR SIMULATING BREAKAGE OF ROOF ROCK BEAM
JP3211449	AUTOMATIC TEARING TESTING DEVICE

Mizogami
Jiang Uzushi

JP2000358536A

June 29, 2005

November 24, 2000

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Kyushu Electric Power Co., Inc.

G01N3/08; G01N3/00; G01N3/24; (IPC1-7): G01N3/08; G01N3/00; G01N3/24

JP4084732A
JP8247913A
JP9264832A
JP64030432U

三谷泰浩,垂直変位制御および垂直応力制御下での岩の不連続面のせん断-透水同時特性,岩盤力学に関するシンポジウム講演論文集,日本,1999年 1月,29,29-35
大西有三, 大津宏康, 矢野隆夫, 高木克実、,垂直剛性一定せん断試験方法を用いた岩盤不連続面の強度推定に関する基礎的研究,地盤工学研究発表会発表講演集,日本,vol. 35th,1039-1040

Masu Kobori
Takato Tsutsumi

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