TEST APPARATUS AND METHOD FOR KEY ROOF BLOCK COLLAPSE IN BIDIRECTIONAL STATIC-DYNAMIC LOADING

Title:

TEST APPARATUS AND METHOD FOR KEY ROOF BLOCK COLLAPSE IN BIDIRECTIONAL STATIC-DYNAMIC LOADING

Document Type and Number:

WIPO Patent Application WO/2019/205189

Kind Code:

A1

Abstract:

A test apparatus and method for key roof block collapse in bidirectional static-dynamic loading. The apparatus comprises: an integrated framework, a horizontal pressure loading system, a vertical pressure loading system, a horizontal pendulum impact disturbance system, a vertical drop hammer impact disturbance system, an incident wave monitoring system, and a response measurement monitoring system. The test method comprises: in a first working condition, an integrated tunnel model test sample performs a bidirectional static-dynamic loading disturbance test to explore the initial stress state of a wall rock around a tunnel and the initial stress condition of a key block rock, and observe the law of crack extension, the formation process of a key block, and the overall phenomenon of key block instability during the disturbance process; in a second working condition, a key block model test sample performs a bidirectional static-dynamic loading disturbance instability test, and abstracts, on the basis of the result in the first working condition, the key block and wall rocks on both sides to more accurately explore the law of crack extension caused by stress waves, critical conditions of the instability sliding of the key block, and the mechanism of action of the instability caused by disturbance.

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Inventors:

ZHU WANCHENG (CN)
DAI FENG (CN)
XU ZENGHE (CN)
LI SHUAI (CN)
NIU LEILEI (CN)
CHENG GUANWEN (CN)
LIU XIGE (CN)
ZHANG PENGHAI (CN)
YU QINGLEI (CN)

Application Number:

PCT/CN2018/085937

Publication Date:

October 31, 2019

Filing Date:

May 08, 2018

Export Citation:

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Assignee:

UNIV NORTHEASTERN (CN)

International Classes:

G01M7/08

Foreign References:

CN105738208A	2016-07-06
CN104266913A	2015-01-07
CN106339546A	2017-01-18
CN101936171A	2011-01-05
CN204330494U	2015-05-13
SU1670508A1	1991-08-15

Other References: