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Method for detecting abnormity of gas quantity monitoring information in coal mine monitoring system

A monitoring system and monitoring information technology, applied in mining equipment, mining equipment, earthwork drilling and mining, etc., can solve problems such as complex modeling and inability to fully reflect the actual situation of coal mines, and achieve the effect of expanding functions and improving reliability

Inactive Publication Date: 2013-07-24
TIANDI CHANGZHOU AUTOMATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few types of "normal performance models of monitoring data based on the principle of non-overrunning" disclosed in this document, which cannot fully reflect the actual situation of coal mines, and the model needs to be established according to the site conditions when applying it. The modeling is relatively complicated, so its practicability requires Further improve

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  • Method for detecting abnormity of gas quantity monitoring information in coal mine monitoring system
  • Method for detecting abnormity of gas quantity monitoring information in coal mine monitoring system
  • Method for detecting abnormity of gas quantity monitoring information in coal mine monitoring system

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Embodiment 1）

[0018] The method for detecting the abnormality of gas quantity monitoring information in the coal mine monitoring system of this embodiment includes: in the same roadway under the coal mine without fresh air, there are a plurality of gas sensors distributed along the wind flow direction, and each gas sensor acquires a gas sensor at intervals. The minimum value measured in the time period (the length of the time period is any value between 1-10 minutes, and the length of the time period for each sensor to detect is equal), the size relationship of the minimum value measured by each gas sensor is consistent with: The minimum value measured by the gas sensor at the upstream of the wind flow ≤ the time delay t of the gas sensor at the downstream of the wind flow 0 The minimum value measured later (due to the time difference when the same air mass flows through different sensors, the downstream sensor should be oriented after the delay time t when comparing the measured values 0 T...

Embodiment 2）

[0021] Such as figure 1 , set the first gas sensor T on the working face and the return airway 1 , the second gas sensor T 2 , the working face is the main emission point of coal mine gas. In the same roadway under the coal mine, between multiple gas sensors distributed along the wind flow direction downstream of the working face, each gas sensor acquires a record of the difference between the maximum value and the minimum value measured during this period of time at regular intervals. is the range value D (the length of the time period is any value between 1-10 minutes, and the length of the time period of each sensor is equal), the range value of each gas sensor should meet: The first extreme difference D1 measured by the gas sensor is greater than the time delay t of the gas sensor far away from the main gas gushing point 0 The second extreme difference value D2 measured in the same length of time period (due to the time difference when the same air mass flows through di...

Embodiment 3）

[0024] The correlation between the measured values ​​of the two gas sensors downstream of the working face in the same roadway without fresh air in the coal mine is consistent: the gas sensor at the upstream of the wind flow is in the first time period (the length of the time period is 1-8 An indicator of the correlation between a set of measurements (each averaged over a period of 1-10 minutes) within a period of time) and the measurements of a gas sensor downstream of the wind flow during a second period of time greater than a set value; if the condition is not met and reaches a certain period of time, it will be judged that the gas monitoring information in the coal mine monitoring system is abnormal and an alarm will be issued;

[0025] Wherein: the time lengths of the first and second time periods are the same, and the time difference between the first and second time period starting points is the wind current translation time t 0 , the wind current translation time t 0...

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Abstract

The invention relates to a method for detecting the abnormity of gas quantity monitoring information in a coal mine monitoring system. The method comprises the following steps of: distributing a plurality of gas sensors in the same alley without new air along an air flow direction under a coal mine well, wherein the relation of minimum values of measured values measured by the gas sensors in the same air flow section accords with the condition that: the minimum value measured by the gas sensor at the upstream of the air flow is less than or equal to the minimum value measured by the gas sensor at the downstream of the air flow; and if the relation does not accord with the condition and a certain time is reached, sending out an alarm. The theory is that: the gas in the coal wall of the alley may emerge along the air flow of the underground air, so the gas at the downstream is more than the gas at the upstream; moreover, after the gas emerges from the coal wall, the gas groups change from unevenness to evenness along the air flow, so the minimum value of the gas concentration in the same air flow cannot be reduced.

Description

technical field [0001] The invention relates to the technical field of underground real-time monitoring of coal mines, in particular to a method for detecting abnormality of gas quantity monitoring information in a coal mine monitoring system. Background technique [0002] Coal mine safety monitoring system is a kind of monitoring equipment widely used in coal mines. It is mainly used to monitor various environments and equipment status in coal mines. When gas is found to exceed the limit, it will perform power-off control, and when other abnormalities are found, it will alarm and power-off control. The current coal mine safety monitoring system distinguishes abnormal analog signals (CH4, CO, wind speed, etc.) mainly by exceeding or lowering a certain value (called over-limit alarm). These methods are all based on the size of the measured value of a single sensor, and cannot find some other abnormalities (abnormal use) in the use of the coal mine monitoring system. For exam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/18
Inventor 邹哲强屈世甲
Owner TIANDI CHANGZHOU AUTOMATION