Optical fiber sensing array-type collecting system for coal-bed gas dynamic pressure measuring

Abstract

The invention discloses an optical fiber sensing array-type collecting system for coal-bed gas dynamic pressure measuring. The optical fiber sensing array-type collecting system comprises an optical fiber sensing array, a processing device and a compensation calibration device. The optical fiber sensing array is used for real-timely collecting gas pressure signals of all detecting points or designated detecting points in a measuring area and converting the gas pressure signals into optical measuring signals. The processing device is used for conducting spectrum parameter analysis through a sensor array spectrum processing unit and a measured information analyzing unit to obtain optical parameters to be subjected to data encapsulation. The compensation calibration device is used for analyzing the optical parameters transmitted by the processing device and subjected to data encapsulation and obtaining accurate gas pressure values after pressure calculating and compensation calibration according to the analyzed optical parameters. According to the optical fiber sensing array-type collecting system, the collected gas pressure information values can be subjected to compensation calibration through a scientific method, and an accurate data foundation is provided for forecasting and early warning of the coal-mine gas pressure.

Description

technical field [0001] The invention relates to a coal seam gas pressure acquisition system, in particular to an optical fiber sensing array type acquisition system for coal seam gas dynamic pressure measurement. Background technique [0002] Coal energy has long occupied the leading position in my country's energy production and consumption, but coal seam gas always threatens the lives of operators and the safety of production systems. The prevention and control of gas disasters and accidents is the top priority of coal mine safety production. Affected by coal seam pressure and coal seam geological conditions, coal seam gas pressure changes dynamically during coal production. If monitoring and treatment are not in place, there will be danger of gas outburst and gas explosion at any time. The real-time evaluation of coal seam gas pressure is the "lightning rod" for identifying and preventing gas disasters, and its measurement is the basis of all gas prevention and control me...

AI Technical Summary

Problems solved by technology

[0004] The accuracy, comprehensiveness and efficiency of coal seam gas dynamic pressure measurement are of great significance to the safety of coal production. Traditional electronic pressure gauges are simple, quick and widely used in gas pressure detection. It is found that there are still some deficiencies in the pressure measurement of the pressure gauge: the accuracy of its indication value cannot be guaranteed because it relies on manual reading; the acquisition of data points is relatively simple, and the monitoring technology of the distribution of gas dynamic pressure in the coal seam area is relatively difficult, and no one has ever adopted it.

[0013] 1. For electronic pressure measuring instruments and non-electronic pressure measuring instruments, the readings need to be read manually, which is inconvenient to operate. Due to the harsh downhole operating environment, when there are many pressure test points, the pressure test becomes very cumbersome;

[0014] 2. Only a single coal seam gas pressure data at a certain time period and a certain location can be obtained, and the gas pressure situation can be estimated through multi-point discrete measurement, and the dynamic pressure situation of coal seam gas cannot be measured in real time;

[0015] 3. During the test, the pressure gauge must be marked with a label and the measurement parameters of the corresponding location point must be recorded. Due to the harsh environment, the pressure gauge label is often lost or damaged, which makes it impossible to determine the specific location corresponding to the pressure value; nor can it be displayed in real time through data visualization methods Measure and evaluate results

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