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Static and dynamic loading experiment machine and method for simulating underground roadway tunneling and drilling operation

A technology of loading experiment and dynamic loading, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., which can solve the problems of unclear research on safety factors, etc.

Active Publication Date: 2021-03-09
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to design a simulated underground roadway excavation and excavation that can simulate the influence of dynamic and static factors on safety in the actual roadway excavation process, aiming at the problem that the research on safety factors is unclear due to the lack of corresponding test equipment in the existing roadway excavation. Static and dynamic loading test machine for drilling operations, and provide corresponding dynamic and static loading and static loading methods

Method used

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  • Static and dynamic loading experiment machine and method for simulating underground roadway tunneling and drilling operation
  • Static and dynamic loading experiment machine and method for simulating underground roadway tunneling and drilling operation
  • Static and dynamic loading experiment machine and method for simulating underground roadway tunneling and drilling operation

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as Figure 1-4 shown.

[0041] A static and dynamic loading test machine for simulating roadway excavation and underground drilling operations, which includes a base 1, a load cell 48 is installed on the lower part of the base 1 to collect drilling debris in real time, and a sample 12 is installed in the middle of the base 1 ( Such as image 3), the static hydraulic servo cylinder 2 is installed in the X+ direction of the base 1, and the reaction force frame 3 and the three-axis numerical control drilling simulation device 4 are installed in the X-direction. The cutter 41 and the cutter bar 42 of the axis numerical control drilling simulation device 4, on the cutter bar 42 there are a drilling speed sensor 43, a torque sensor 44 and a servo rotation drive motor 45 in sequence, and the servo rotation drive motor 45 is installed on the servo drive horizontal moving workbench 46. ​​The servo-driven lifting device 47 is connected to the bottom of the horizontal movin...

Embodiment 2

[0043] Such as Figure 1-6 shown.

[0044] A static and dynamic loading test method for simulating roadway excavation comprises the following steps:

[0045] (1) Use the similarity criterion to prepare cuboid samples or process cuboid samples from coal and rocks taken from mines12;

[0046] (2) Apply a static load to the sample 12 by using a static hydraulic servo cylinder or a hollow sliding hydraulic cylinder or a dynamic hydraulic servo cylinder;

[0047] (3) The computer program controls the movement trajectory of the cutter 41, simulates the tunneling operation of the coal mine underground roadway, excavates rectangular, circular, and arched roadways, and uses acoustic emission sensors, infrared sensors, electromagnetic radiation sensors and mechanical sensors to collect the operation process during the test Acoustoelectric and mechanical signals in

[0048] (4) Use the cutter 41 to excavate a certain depth on the sample 12, withdraw the cutter 41 from the sample 12, a...

Embodiment 3

[0056] Such as Figure 1-4 shown

[0057] A static loading test method for simulating downhole drilling operations, comprising the following steps:

[0058] (1) Use the similarity criterion to prepare cuboid samples or process cuboid samples from coal and rocks taken from mines12;

[0059] (2) Apply one-way, two-way and three-way static loads to sample 12 to simulate different coal and rock stress environments;

[0060] (3) The computer program controls the cutting tool 41 to simulate the downhole drilling operation. During the test, the drilling speed sensor 43 and the torque sensor 44 are used to collect the drilling speed and torque, and the weighing sensor is used to collect the amount of drilling chips in real time. , The electromagnetic radiation sensor collects the acoustic and electric signals during the drilling process;

[0061] (4) After using the tool 41 to drill a certain depth on the sample 12, withdraw the tool 41 from the sample 12, and use a micro camera to...

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Abstract

A static and dynamic loading experiment machine and method for simulating roadway tunneling and underground drilling operation are characterized in that the experiment machine comprises a base, and astatic hydraulic servo cylinder, a counter-force frame, a three-axis numerical control drilling and tunneling simulation device, a horizontal dynamic loading device, a workbench and stand columns areinstalled on the base; the horizontal dynamic loading device is a hollow sliding hydraulic cylinder with an impact bar, and a Hopkinson impact device or a pendulum bob impact device is placed in the direction of the impact bar of the hollow sliding hydraulic cylinder; and a sample is placed on the workbench, the stand columns are connected with a liftable top plate, a vertical dynamic loading device is installed in the middle of the top plate, the vertical dynamic loading device is a hollow sliding hydraulic cylinder or a dynamic hydraulic servo loading cylinder with an impact bar, and a drophammer impact device is installed on the upper portion of the impact bar of the hollow sliding hydraulic cylinder. The experiment machine is simple in structure and complete in function, can be used for various dynamic and static tests, and has important engineering application value for rock burst prevention and control of mines.

Description

technical field [0001] The invention relates to a mine safety technology, in particular to a roadway excavation safety technology, in particular to a static and dynamic loading test machine and method for simulating underground roadway excavation and drilling operations. Background technique [0002] At present, there are problems such as unclear induction mechanism of rock burst in coal roadway excavation, low prevention and control effectiveness, and lack of targeted risk assessment and basic theory of prevention and control. In recent years, it has become a weak area in coal mine rock burst prevention and control work. Experimental research is an important research method to reveal the breeding mechanism of rock burst in coal roadway excavation. At present, the excavation operation is simulated in the loading sample, and dynamic disturbance is applied at the same time to systematically study the impact appearance law of the tunnel excavation under the action of dynamic lo...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N3/307G01N3/02
CPCG01N3/02G01N3/12G01N3/307G01N2203/0003G01N2203/001G01N2203/0019G01N2203/0026G01N2203/0048G01N2203/0067G01N2203/0252G01N2203/0254G01N2203/0256G01N2203/0282G01N2203/0617G01N2203/0641G01N2203/0658
Inventor 王桂峰刘阳曹安业巩思园窦林名蔡武
Owner CHINA UNIV OF MINING & TECH
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