Graded depressurization type borehole crack detection method

A detection method and step-down technology, applied in geophysical measurements, instruments, etc., can solve the problems of unsuitable control of water pressure, troublesome operation process, poor stability of conversion process, etc. sexual effect

Inactive Publication Date: 2018-11-20
DALIAN UNIV OF TECH
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Problems solved by technology

The on-site detection adopts a series of detection equipment represented by "double-end plugging leak detection device". There are multiple operation and control systems connected to the external end, and there are at least 2 or more pipelines in the corresponding interior. The operation process is cumbersome and There is a winding problem, and the stability is poor during th

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  • Graded depressurization type borehole crack detection method
  • Graded depressurization type borehole crack detection method
  • Graded depressurization type borehole crack detection method

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Embodiment Construction

[0068] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0069] Such as Figure 1-3 As shown, a hierarchical step-down drilling fissure detection system mainly includes a test probe, a drilling rig 14 , a drill pipe 12 , and a control console 36 .

[0070] The test probe mainly includes a front occluder 34, a tail occluder 35, a pressure-dividing assembly 47 connected to the tail of the front occluder 34, and the pressure-dividing assembly 47 is blocked with the tail by a connecting pipe 28. Connected to the device 35, mainly including the primary converter 6 and the secondary converter 37, the secondary converter 37 is sleeved on the outer end of the primary converter 6, and the two are threaded, and the occluder is composed of the leakage pipe 3, a series of The joint and the rubber bag 5 are composed, and the rubber bag 5 is wrapped around the outer end of th...

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Abstract

The invention relates to a graded depressurization type borehole crack detection method, and belongs to the technical field of determination of the rock mining damage range. A used system comprises atest probe, a drilling machine, a drilling rod and a control operating console, the test probe comprises a plugging device and a partial pressure assembly, the partial pressure assembly is connected with the tail plugging device via a communicating pipe and comprises primary and secondary converters, the secondary converter sleeves the primary converter and is in threaded connection with the primary converter, the plugging device comprises a water leakage pipe, a series joint and a rubber capsule, the rubber capsule wraps the water leakage pipe, a plugging cavity is formed between the rubber capsule and the water leakage pipe, and the two ends of the plugging cavity are fixed by fastening loops. The water leakage pipe is provided with water leakage holes, outside water enters the pluggingcavity via the water leakage holes, the rubber capsule is expanded, and a water injection cavity is formed with a borehole. An original operating system is simplified, the problem of drilling coilingis solved, plugging and observation processes are realized via the same outside, and are kept in different pressures, and pressure conversion is more sensitive and more stable.

Description

technical field [0001] The invention belongs to the technical field of rock mass damage range measurement, and in particular relates to a detection method for graded pressure-reducing drilling fissures. Background technique [0002] The measurement of the depth of the mining fracture zone in the mine floor is an important parameter to indicate the occurrence state of coal and rock. It is a key basic parameter in the study of mine water prevention and control. Therefore, in order to study the formation of water-conducting channels in mining surrounding rocks, it is necessary to grasp the law of rock movement and determine the height of mining damage zones. The on-site detection adopts a series of detection equipment represented by "double-end plugging leak detection device". There are multiple operation and control systems connected to the external terminals, and there are at least 2 or more pipelines in the corresponding interior. The operation process is cumbersome and The...

Claims

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Application Information

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IPC IPC(8): G01V9/00
Inventor 梁正召宋文成张梅丽李迎春唐春安滑笑笑赵慧子
Owner DALIAN UNIV OF TECH
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