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Method and apparatus for measuring volume of goaf by using gas concentration difference method

A technology of gas concentration and goaf, applied in the direction of volume measurement instrument/method, measuring device, measuring capacity, etc., can solve the problems of smaller volume of goaf, unsuitable for karst cavity, unable to accurately obtain the volume of goaf, etc. , to achieve the effect of improving budget accuracy, facilitating integration and promotion, and simple principle

Pending Publication Date: 2019-09-06
山东省地质矿产勘查开发局八〇一水文地质工程地质大队
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The inventors have found that both methods of collecting mineral mining data and three-dimensional laser scanning have their own shortcomings: (1) collecting mineral mining data: first, this method is not suitable for karst cavities; secondly, most of the mining goafs have been closed Over the years, due to factors such as natural settlement and disrepair, the internal space of the goaf has undergone major changes, and the volume of the goaf has become smaller
There are many roadways and stopes in the underground goaf, and it is often impossible to accurately obtain the volume of the entire goaf in actual measurement
To sum up, the existing methods cannot accurately obtain the volume of the underground goaf, therefore, the amount of backfill for treatment cannot be accurately determined

Method used

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  • Method and apparatus for measuring volume of goaf by using gas concentration difference method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A method for measuring the volume of a gob by using the gas concentration difference method in this embodiment includes:

[0057] Step 1: After determining the location of the goaf, drill to obtain a borehole connected to the goaf;

[0058] Step 2: Use the concentration detection sensor to measure and obtain the original pre-selected gas concentration value ρ in the goaf 1 ;

[0059] Step 3: Connect the preselected gas storage equipment and inject the preselected gas into the goaf, record the mass Δm of the injected preselected gas and the concentration value ρ of the preselected gas in the goaf at this time 2 ;

[0060] Step 4: According to the formula Calculate the goaf volume V x .

[0061] In specific implementation, the pre-selected gas in this embodiment is CO 2 gas.

[0062] In order to avoid harm to the measurement personnel due to gas leakage, the pre-selected gas in this embodiment is CO 2 gas, and CO 2 Gas is also common in gobs.

[0063] It should...

Embodiment 2

[0073] A device for measuring the volume of a gob by using the gas concentration difference method in this embodiment includes:

[0074] A concentration sensor, which is arranged in the goaf, is used to detect the pre-selected gas concentration value in the goaf;

[0075] A communication pipeline, which is used to communicate with preselected gas storage equipment and inject preselected gas into the goaf;

[0076] Gravimetric equipment for obtaining the mass Δm of the preselected gas injected into the goaf;

[0077] Controller, configured as:

[0078] Receive the concentration detection sensor to measure the original pre-selected gas concentration value ρ in the goaf 1 ;

[0079] The concentration value ρ of the preselected gas in the goaf when the preselected gas mass Δm is injected into the goaf 2 ;

[0080] According to the formula Calculate the goaf volume V x .

Embodiment approach

[0081] As an embodiment, the preselected gas is CO 2 gas.

[0082] In order to avoid harm to the measurement personnel due to gas leakage, the pre-selected gas in this embodiment is CO 2 gas, and CO 2 Gas is also common in gobs.

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Abstract

The disclosure provides a method and apparatus for measuring the volume of a goaf by using a gas concentration difference method. The method comprises: after determination of a goaf position, carryingout drilling to obtain a drill hole communicated with the goaf; carrying out measurement by using a concentration detecting sensor to obtain an originally preselected gas concentration value rho1; communicating a preselected gas storage device, injecting preselected gas into the goaf, and recording the mass deltam of the injected preselected gas and a concentration value pho2 of the preselected gas in the goaf at the time; and according to a formula, calculating the volume Vx of the goaf. The volume of the goaf is measured by using the gas concentration difference method; and the volume can be obtained accurately on the premise that the specific shape of the goaf is not considered, so that the accurate data are provided for backfilling of the goaf.

Description

technical field [0001] The disclosure belongs to the field of goaf volume measurement, and in particular relates to a method and a device for measuring the volume of a gob by using a gas concentration difference method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Most of the goaf treatment needs backfilling, so its volume measurement is particularly important. At present, the goaf volume measurement mainly adopts two methods of mining data collection and three-dimensional laser scanning. [0004] The inventors have found that both methods of collecting mineral mining data and three-dimensional laser scanning have their own shortcomings: (1) collecting mineral mining data: first, this method is not suitable for karst cavities; secondly, most of the mining goafs have been closed Over the years, due to factors such as natural settlemen...

Claims

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Application Information

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IPC IPC(8): G01F17/00
CPCG01F17/00
Inventor 杨茂伟郭长恩雷柄霄王蕾
Owner 山东省地质矿产勘查开发局八〇一水文地质工程地质大队
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