Down-hole coal seam earthquake CT detection vibroseis and method based on seismal waves excited by spring

A shock wave and coal seam technology, which is applied in the field of vibroseis for underground coal seam CT detection, can solve the problem of automatic and normalized dynamic disaster prediction, difficult to effectively and timely test the effect of anti-shock measures, and potential safety hazards of explosive seismic sources To achieve the effect of automation and normalization, simple structure and guaranteed construction safety

Active Publication Date: 2015-02-25
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to aim at the existing underground seismic CT detection technology, the use of explosive seismic sources has many potential safety hazards, low efficiency, and large engineering volume, and it is difficult to meet the dynamic and timely prediction and forecast of impact mine pressure and other dynamic manifestations, and it is difficult to realize For the automation and normalization of dynamic disaster prediction and forecasting, it is difficult to effectively and timely test the effect of anti-scouring measures, etc., to provide a seismic source and method for exciting shock waves in boreholes for CT detection of underground coal seam earthquakes. The seismic source can be used in roadway construction. Excite shock waves in holes drilled at any angle, small size, safe and reliable, simple operation, high degree of automation, and can excite shock waves stably and controllably for a long time

Method used

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  • Down-hole coal seam earthquake CT detection vibroseis and method based on seismal waves excited by spring
  • Down-hole coal seam earthquake CT detection vibroseis and method based on seismal waves excited by spring
  • Down-hole coal seam earthquake CT detection vibroseis and method based on seismal waves excited by spring

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Experimental program
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Effect test

Embodiment 1

[0035] like Figure 1-3 shown.

[0036] A vibrator for CT detection of underground coal seam earthquakes based on spring-excited shock waves, which is mainly composed of a sleeve, a spring striking mechanism and a power mechanism. The spring striking mechanism is installed in the sleeve 11, and the sleeve 11 passes through the pressing plate 7 and the end cap 8 are fixed in the hole drilled in the roadway where the detection position needs to be carried out, the end cap 8 is fixed on the end face of the sleeve 11, and the pressure plate 7 can be fixed by the end 17 of the anchor rod or the anchor cable in the roadway ( figure 1 , 2 ), can also be fixed by the connector 19 on the bracket body 18 ( image 3 As shown), the pressure plate 7 presses the end cover 8, thereby fixing the casing 11 in the drilled hole and fixedly installed in the hole drilled on the roadway wall. The spring hitting mechanism includes a spring 12, a hammer head 15 and a backing plate 16, One end of t...

Embodiment 2

[0048] Such as Figure 2-4 shown.

[0049] A vibrator for CT detection of underground coal seam earthquakes based on spring-excited shock waves. It is mainly composed of a sleeve, a spring striking mechanism and a power mechanism. The spring striking mechanism is installed in the sleeve 11, and the sleeve 11 passes through the pressing plate 7 and the end cover 8 are fixed in the hole drilled in the roadway where the detection position needs to be carried out, the end cover 8 is fixed on the end face of the sleeve 11, and the pressure plate 7 can be fixed by the end 17 of the anchor rod or the anchor cable in the roadway ( figure 1 , 2 ), can also be fixed by the connector 19 on the bracket body 18 ( image 3 As shown), the pressure plate 7 presses the end cover 8, thereby fixing the casing 11 in the drilled hole and fixedly installed in the hole drilled on the roadway wall. The spring striking mechanism includes a spring 12, a hammer head 15 and a backing plate 16, One end...

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Abstract

The invention discloses a down-hole coal seam earthquake CT detection vibroseis and method based on seismal waves excited by a spring. The down-hole coal seam earthquake CT detection vibroseis is characterized by comprising a spring striking mechanism and a power mechanism, wherein the spring striking mechanism is installed inside a sleeve (11), the sleeve (11) is fixedly installed in a hole drilled in a roadway wall through a fixing mechanism, the spring striking mechanism comprises the spring (12), a hammerhead (15) and a base plate (16), one end of the base plate (16) is inserted into the sleeve (11), the other end of the base plate (16) is located outside the sleeve (11) and abuts against the bottom of the drilled hole, the spring (12) drives the hammerhead (15) to strike the base plate (16), and the end, outside the sleeve, of the base plate (16) strikes the bottom of the hole, so that the controllable seismal waves are generated in a coal seam; a guide groove is formed in the hammerhead (15), movement guiding is achieved through a guiding pin (14) installed on the sleeve (11), and the power mechanism is used for driving the hammerhead (15) to compress the spring (12), so that the hammerhead (15) is in the excited state. The down-hole coal seam earthquake CT detection vibroseis is simple in structure and easy to obtain.

Description

technical field [0001] The invention relates to a seismic CT detection technology, in particular to a vibroseis CT detection technology, in particular to a vibroseis and method for underground coal seam seismic CT detection based on spring-induced shock waves. Background technique [0002] At present, the frequency and intensity of rock burst in my country are increasing, which poses a major threat to the safe production of coal resources. The occurrence of rock burst is directly related to the high stress of coal and rock accumulation. The study of stress distribution in coal rock is the basis for analyzing and predicting the risk of rock burst and other dynamic phenomena. 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. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/143
Inventor 王桂峰巩思园窦林名毛永李振雷何江
Owner CHINA UNIV OF MINING & TECH
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