Test device and test method of fractured rock mass collapse and rockfall and fracture water inrush

Patent metadata

Field	Value
Publication number	US-10768083-B2
Application number	US-201716314607-A
Country	US
Kind code	B2
Filing date	Sep 13, 2017
Priority date	Sep 14, 2016
Publication date	Sep 8, 2020
Grant date	Sep 8, 2020

Abstract

A test device and a test method of fractured rock mass collapse and blockfall and fracture water inrush includes a fractured rock mass preparation device, a water source loading device, a surrounding rock pressurization device and a slide rail, wherein the fractured rock mass preparation device is fixed at one end of the slide rail, and the water source loading device is fixed on the other side of the slide rail. An opening is formed in the rock mass water storage structure, and the size of the opening is adapted to the size of the fractured rock mass; the surrounding rock pressurization device includes one bracket and a pressurization structure arranged below the bracket, and a space for accommodating the fractured rock mass is reserved below the pressurization structure; and the bottom support and the bracket are both movably installed on the slide rail.

First claim

The invention claimed is:

1. A fractured rock mass preparation device for a fractured rock mass test, the device comprising:
a template comprising an upper die, and a lower die,
a bottom support movably installed on a slide rail to which is fixed a water source loading device and to which is connected a surrounding rock pressurization device, and
a cutterhead installed on a side face of the bottom support, wherein:
the template is arranged above the bottom support, with the lower die of the template being fixed on the bottom support;
the upper die is located above the lower die;
the upper die, the lower die, and the bottom support constitute a molding cavity of a simulative rock mass;
the cutterhead is movably installed on the lower die through a guide rail which is horizontally arranged;
after a rock mass is formed, the cutterhead is configured to slide toward the rock mass to cut the rock mass to obtain a fractured rock mass;
the fractured rock mass preparation device is fixed at one end of the slide rail, the other end of the slide rail is fixed to the water source loading device, and the water source loading device comprises:
a water source;
a rock mass water storage structure having an opening, a size of the opening being adapted to a size of the fractured rock mass formed by the cutterhead; and
a water pump connected between the water source and the rock mass water storage structure; and

the surrounding rock pressurization device comprises at least one bracket movably installed on the slide rail and a pressurization structure arranged below the bracket, a space for accommodating the fractured rock mass being reserved below the pressurization structure.

2. A test device of fractured rock mass collapse and fall-rock and fracture water inrush, comprising a fractured rock mass preparation device, a water source loading device, a surrounding rock pressurization device and a slide rail, wherein the fractured rock mass preparation device is fixed at one end of the slide rail, and the water source loading device is fixed on the other side of the slide rail;
the fractured rock mass preparation device comprises a template, a cutterhead and a bottom support, the template being arranged above the bottom support, and the cutterhead being installed on a side face of the bottom support for cutting the formed rock mass to form the fractured rock mass;
the water source loading device comprises a water source and a rock mass water storage structure, a water pump being connected between the water source and the rock mass water storage structure, an opening being formed in the rock mass water storage structure, and the size of the opening being adapted to the size of the fractured rock mass;
the surrounding rock pressurization device comprises at least one bracket and a pressurization structure arranged below the bracket, a space for accommodating the fractured rock mass being reserved below the pressurization structure; and
the bottom support and the bracket are both movably installed on the slide rail.

3. The test device according to claim 2 , wherein when the formed fractured rock mass slides to the arched opening of the rock mass water storage structure to form seal fit, a test device for simulating fracture water inrush is formed, and the water pressure in the rock mass water storage structure is controlled through the water pump to simulate the fracture water inrush under different water pressures.

4. The test device according to claim 2 , wherein template comprises an upper die and a lower die, the lower die is installed on a bottom bracket, and the upper die, the lower die and the bottom bracket form a molding cavity of the arched rock mass.

5. The test device according to claim 4 , wherein the upper surface of the lower die is a semi-cylindrical molding surface, and the chamber of the upper die is arched.

6. The test device according to claim 4 , wherein the cutterhead is movably installed on the lower die by the guide rail and is movable in the horizontal direction along the lower die; and the length of the lower die is greater than that of the cutterhead.

7. The test device according to claim 2 , wherein the lower die is placed on two groups of bottom brackets, which are a first group of bottom brackets and a second group of bottom brackets, the first group of bottom brackets being fixed at an end of the slide rail, the second group of bottom brackets being movably installed on the slide rail, and the upper die, the lower side and the second group of bottom brackets constituting the molding cavity of the arched rock mass.

8. The test device according to claim 2 , wherein the cutterhead is provided with a plurality of blades, and the blades are arranged in a stagger manner to generate joint fissures.

9. The test device according to claim 8 , wherein the angles of the blades on the cutterhead are adjustable to generate different joint fissures.

10. The test device according to claim 2 , wherein the bracket is a steel frame, and the lower surface of the steel frame is arched.

11. The test device according to claim 10 , wherein the pressurization structure comprises multiple groups of pressurization devices, each group of pressurization devices comprising a hydraulic jack and a curved plate, one end of the hydraulic jack being fixed on the lower surface of the steel frame, and the other end of the hydraulic jack being fixedly connected with the curved plate.

12. The test device according to claim 11 , wherein the multiple groups of pressurization devices are arranged in a row, and the plurality of curved plates are connected into an arch shape.

13. A test method of fractured rock mass collapse and rockfall and fracture water inrush, the method comprising the following steps:
1) injecting similar materials into upper and lower dies to prepare a simulative rock mass, and separating the upper die from the simulative rock mass;
2) sliding a cutterhead toward the simulative rock mass to cut the rock mass to obtain the fractured rock mass;
3) separating the fractured rock mass from the lower die;
4) moving the fractured rock mass to a rock mass water storage structure, and sealing the fractured rock mass with an opening of the rock mass water storage structure;
5) injecting water into the rock mass water storage structure, and adjusting the internal water pressure to perform a fracture water inrush test;
6) pressurizing the fractured rock mass by using a surrounding rock pressurization device to perform a fracture collapse test;
or pressurizing the fractured rock mass during the fracture water inrush test; and
the order of the above steps can be adjusted as long as the test is not affected.

Assignees

• Univ Shandong

Inventors

• Li Shucai
• Li Liping
• Shi Shaoshuai
• Zhou Zongqing
• Liu Hongliang
• Hu Jie
• Sun Shangqu
• Wang Jing
• Tu Wenfeng
• Wen Zhijie

Classifications

• G01N33/24 Primary

  Earth materials (G01N33/42 takes precedence) · CPC title

• G01N2203/0048

  Hydraulic means · CPC title

• G01N3/12

  Pressure testing · CPC title

• G01N2203/0019

  Compressive · CPC title

• G01N2203/0067

  Fracture or rupture · CPC title