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Shock wave excitation method and device for seismic CT detection arranged in roadway

A technology of shock wave and internal arrangement, which is applied in the field of seismic CT detection in coal mines and the field of shock wave excitation for seismic CT detection. Effect

Active Publication Date: 2017-08-04
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to use explosives as a seismic source with many potential safety hazards, low efficiency, and large engineering volume. It is difficult to use seismic CT detection technology to reflect the dynamic changes and transfer of stress in the working face in a timely manner, and it is difficult to meet dynamic disasters such as rock bursts, coal and gas outbursts, etc. In order to solve the problems of dynamics and timely prediction and forecasting, a shock wave excitation method and device for seismic CT detection arranged in the roadway was invented. moderately excited shock wave

Method used

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  • Shock wave excitation method and device for seismic CT detection arranged in roadway
  • Shock wave excitation method and device for seismic CT detection arranged in roadway
  • Shock wave excitation method and device for seismic CT detection arranged in roadway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as Figure 1-4 shown.

[0052] A shock wave excitation method for earthquake CT detection arranged in a roadway, in which a fuselage 8 is fixed between the roadway roof 11 and the bottom plate 4 through a jacking mechanism 10, the backing plate 1 is buried in the roadway bottom plate 4, and placed on the base 2 One side of backing plate 1 is in contact with the coal and rock mass, the pin 7 is held up by the claw arm 13 of the hydraulic lifting mechanism, the gas spring 9 is compressed, the grapple 14 of the pneumatic release device grabs the pin 7, and the cylinder 17 of the pneumatic release device catches the pin 7 Compressed air is injected into the upper cavity, the cylinder 17 is retracted, and the splint 18 locks the grapple 14, so that the source is in a state to be excited, such as figure 2 . Inject compressed air into the lower chamber of the cylinder 17, the cylinder 17 extends out, the splint 18 is unlocked, the gas spring 9 is released, the gas spri...

Embodiment 2

[0056] Such as Figure 5-6 shown.

[0057] A shock wave excitation method for seismic CT detection arranged in a roadway, in which the fuselage 8 is bolted to the roadway wall through anchor rods, anchor cable ends 20 , steel plates 21 and steel plates 22 . The backing plate 1 is buried in the roadway floor 4 and placed on the base 2. One side of the backing plate 1 contacts the coal and rock mass, and the pin 7 is lifted by the claw arm 13 of the hydraulic lifting mechanism, the compressed gas spring 9, and the grip of the pneumatic release device. Hook 14 grabs pin 7, injects compressed air into the upper cavity of cylinder 17 of pneumatic release device, cylinder 17 retracts, splint 18 locks grabbing hook 14, makes the seismic source in the state to be excited. Inject compressed air into the lower chamber of the cylinder 17, the cylinder 17 extends out, the splint 18 is unlocked, the gas spring 9 is released, the gas spring 9 drives the hammer head 6 to hit the backing pla...

Embodiment 3

[0061] Such as Figure 7 shown.

[0062] A shock wave excitation method for earthquake CT detection arranged in a roadway, in which a fuselage 8 is fixed between the roadway roof 11 and the bottom plate 4 through a jacking mechanism 10, the backing plate 1 is buried in the roadway bottom plate 4, and placed on the base 2 One side of backing plate 1 contacts the coal and rock mass, drives drum 30 by air motor 31, pulls wire rope 26, drives pulley 25 through pulley 29, claw hook 23 grasps hammerhead 6 and moves up, and compresses metal spring 27. When the positioning cylinder 28 pushes the push plate 24 to move down, the claw hook 23 is forced to open, and the metal spring 27 is released. The metal spring 27 drives the hammer head 6 to hit the backing plate 1 embedded in the roadway floor 4, and the backing plate 1 hits the coal. The rock mass excites shock waves in the coal rock mass. The tightening mechanism tightens the reaction force of the roof of the roadway, and applies...

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Abstract

Provided are a seismal wave excitation method for earthquake CT detection and a seismal wave excitation device arranged in a roadway. The method and device are characterized in that an earthquake source is fixed between a top plate and a bottom plate of the roadway through a tightening mechanism or fixed to a roadway wall through an anchor rod and an anchor cable end, a gas spring and a metal spring are used to serve as excitation power sources, a coal and rock mass is stricken through the cushion plate by driving a hammer head to strike a cushion plate buried in the bottom plate of the roadway, or the coal and rock mass is stricken through the cushion plate by striking the cushion plate arranged on the surface of the bottom plate of the roadway, and a seismal wave is excited in the coal and rock mass; or explosion of gas or solids is used to serve as the excitation power source, and the seismal wave is excited in the coal and rock mass. The seismal wave excitation device can be applied to the working environment of a coal mine underground roadway, is simple in structure, convenient to assemble and disassemble and capable of replacing an explosion earthquake source and improving the efficiency of the earthquake CT detection technology.

Description

technical field [0001] The invention relates to a seismic CT detection technology, in particular to a coal mine underground seismic CT detection technology, in particular to a shock wave excitation method and device for seismic CT detection arranged in a roadway. Background technique [0002] The occurrence of dynamic disasters such as rock burst, coal and gas outburst is directly related to the high stress of coal and rock mass accumulation. According to the good correspondence between wave velocity and stress, seismic CT detection technology can invert the stress distribution characteristics during the excavation of coal and rock mass, so as to predict the rock burst and other dangerous areas where dynamics appear in the next period. In recent years, this technology has begun to be applied in the field of coal mines. The seismic source is generated by blasting in the coal seam mining face. This method has many safety hazards and a large amount of engineering, which makes i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/18
CPCE21F17/18G01V1/147
Inventor 王桂峰巩思园窦林名何江蔡武李振雷
Owner CHINA UNIV OF MINING & TECH