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Device and method for measuring goaf large-diameter drilling mining range

A large-diameter and goaf technology is applied in the field of gas effect investigation in super-large diameter coal seam drilling and intubation mining goaf, which can solve the problem of destroying the original occurrence state of the coal body, affecting the drainage effect, and increasing the drainage channel. and other problems, to achieve the effects of good economy and popularity, easy capture and easy operation

Pending Publication Date: 2019-01-22
CCTEG SHENYANG RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large-diameter boreholes are constructed underground in coal mines, which increases the drainage channels and destroys the original state of the coal body. It is difficult to accurately determine the influence range of drainage through the previous direct method. At this stage, it is only based on the change of gas concentration or pressure in the hole Changes, this rough investigation method cannot accurately reflect the influence range of drainage, and the inability to accurately measure the effective influence range will lead to the existence of drainage blind spots, which will affect the drainage effect. Field practice shows that only scientific and accurate measurement of the influence radius , in order to effectively guide the underground drilling construction, determine the best effect, ensure the personal safety of underground personnel and maximize economic benefits

Method used

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  • Device and method for measuring goaf large-diameter drilling mining range
  • Device and method for measuring goaf large-diameter drilling mining range
  • Device and method for measuring goaf large-diameter drilling mining range

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Embodiment 1

[0031] Such as figure 2 As shown, this embodiment proposes a device for measuring the extraction range of large-diameter boreholes in the gob 8, including a tracer gas bottle 23, a gas pipe 24, a connecting main body 18 and a gas injection pipe 2422, and the connecting main body 18 has a gas cylinder for gas injection. The connection assembly 10 and the test steel pipe connector 20, wherein the tracer gas bottle 23 is connected to the gas cylinder gas injection connection assembly 10 connected to the main body 18 through the gas pipe 24, and the test steel pipe connector 20 connected to the main body 18 is connected to the gas injection pipe 2422.

[0032] Specifically, in this implementation, the tracer gas cylinder 23 is connected to the gas cylinder gas injection connection assembly 10 communicating with the main body 18 through the gas pipe 24, specifically the gas cylinder gas injection connection head 11 below the gas cylinder gas injection connection assembly 10, the ga...

Embodiment 2

[0037] combine Figure 1-Figure 3 As shown, the present embodiment proposes a method for measuring the extraction range of 8 large-diameter boreholes in the goaf, including the following steps:

[0038] Step 1. Start constructing the drainage borehole 4 along the vertical direction on the side of the return airway in the goaf 8 and record the depth of the drainage borehole 4. Put the drainage pipeline into the drainage borehole 4 and close the drainage The orifice of mining borehole 4;

[0039] Step 2. Construct several equally spaced gas injection holes from the direction of the parallel extraction borehole 4 of the return airway, and record the hole depth of the gas injection holes;

[0040] Step 3, inject tracer gas into the gas injection hole and block the gas injection hole;

[0041] Step 4. Go to the drainage hole through the drainage pipeline for gas drainage, and use a tracer gas detector to detect and record the concentration of tracer gas in each gas injection hole...

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Abstract

The invention relates to the technical field of super-large-diameter coal bed pipe insertion mining goaf gas effect observation and relates to a device and method for measuring a goaf large-diameter drilling mining range. The device comprises a tracer gas bottle, a gas pipe, a communication body and a gas injection pipe and is characterized in that the communication body is provided with a gas bottle gas injection connecting component and a testing steel pipe connector, the tracer gas bottle is connected with the gas bottle gas injection connecting component through the gas pipe and the communication body, and the testing steel pipe connector of the communication body is connected with the gas injection pipe. The device has the advantages that the blank of actual measuring of large-pore-diameter mining goaf gas influence radius is filled up, and the feature that SF6 gas does not have reaction with any factor in coal and is easy to capture is utilized to effectively measure the large-pore-diameter goaf gas mining influence range. The method is simple to operate, low in cost, capable of achieving measuring by the self-technological ability of a coal mine and quite good in economicalefficiency and popularity.

Description

technical field [0001] The invention relates to the technical field of investigation on the gas effect in goafs of ultra-large-diameter coal seam borehole intubation, and in particular to a device and method for measuring the range of goaf drainage by using tracer gas. Background technique [0002] Coal mines have invested a lot of manpower and financial resources in the prevention and control of gas disasters, especially in the aspect of gas drainage, which has carried out a lot of research work and engineering investment, and adopted a combination of various drainage methods to control mine gas. [0003] However, due to the current "U"-shaped ventilation method used in the mining face, and the high production intensity of the working face, the gas gushing out of adjacent layers has a serious impact, resulting in a large amount of gas gushing out of the goaf, and the management of gas in the upper corner is particularly difficult. From the perspective of gas sources, the pr...

Claims

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Application Information

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IPC IPC(8): E21F7/00E21B47/11E21B47/06
CPCE21B47/06E21F7/00E21B47/11
Inventor 雷云张兴华孙亮梁忠秋潘竟涛邹永洺贾男闫循强王祎刘扬刘飞张辉金广东
Owner CCTEG SHENYANG RES INST