A wireless interactive goaf multi-field coupling data acquisition system and its application method

Abstract

The present invention provides a wireless interactive goaf multi-field coupling data acquisition system and its use method. The device includes a data collector placed in the goaf for data acquisition, a signal amplification device for amplifying signals, The device protector used to protect the data collector and signal amplifying device, also includes the downhole data receiving station for receiving data information, the ground console for controlling the data acquisition system and storing and displaying the collected data , a downhole mobile console, and a tracer gas release device for releasing tracer gas into goafs. This device can collect data such as the pressure field, seepage field, velocity field, gas concentration field, and temperature field of the goaf during the mining process of the working face. Provide basic data for research on the characteristic of spontaneous combustion oxidation and temperature rise of residual coal in goafs, and formulating efficient prevention and control measures for residual coal spontaneous combustion. The device has more flexible location selection of measuring points in the goaf, more convenient device installation, free setting of the number of measuring points, more reliable system stability, and more timely and accurate data collection. The device has low manufacturing cost, convenient operation and wide applicability.

Description

technical field [0001] The invention relates to the technical field of mine safety engineering, in particular to a wireless interactive goaf multi-field coupling data acquisition system and a using method. Background technique [0002] Fire is one of the five major disasters in mines. Once it occurs, it can cause serious property losses and casualties. If secondary disasters are triggered, the losses will increase further. Mine fires are mainly coal spontaneous combustion disasters, accounting for more than 90% of the total number of fires. According to statistics, more than 50% of the state-owned coal mines in my country have the risk of coal spontaneous combustion, and coal spontaneous combustion is the most spontaneous combustion of leftover coal in goafs, accounting for more than 95% of coal spontaneous combustion disasters in mines. It can be seen that preventing spontaneous combustion of residual coal in goafs is the key to controlling mine fires. With the increase o...

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Problems solved by technology

[0005] For the study of the reasons for the spontaneous combustion of leftover coal in the goaf, the current data collection in the goaf mainly has the following deficiencies: 1) The data collection in the goaf is incomplete, and it is impossible to analyze the cause of the spontaneous combustion of the leftover coal in the goaf

2) Due to the long bundle tubes and wires laid in the goaf, they are easily crushed by falling rocks in the goaf, resulting in data often not being collected normally

3) The conditions in the mined-out area are relatively complicated, and there are often water seepage and coal dust, which can easily enter the bundle pipe to block the bundle pipe, soak and bury the temperature sensor, resulting in the failure of the bundle pipe to take gas and the temperature sensor to sense the gas temperature normally

4) Due to the difficulty of laying bundle tubes, wires and protective sleeves (metal protection tubes set outside the wires), the installation positions of bundle tubes and temperature sensors are largely limited, and data at some key positions cannot be collected

5) The data collection position in the vertical direction is difficult to fix, especially in caving coal mining, the data collection position must be at a certain height from the floor to accurately measure the data, and the beam tube and temperature sensor often fall under the action of roof pressure and gravel. Being pressed to the bottom plate, data cannot be collected normally

6) The number of data collection points is limited, generally 2 to 8, so that the data observation density in the goaf is not enough, and the analysis results have large deviations

7) Since the bundle tubes and wires of each data collection point are bundled together and lead out from the goaf, once damaged by the broken roof, the data of all data collection points cannot be collected

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