Wireless interactive goaf multi-field coupling data collection system and using method

Abstract

The invention provides a wireless interactive goaf multi-field coupling data collection system and a using method. The wireless interactive goaf multi-field coupling data collection system comprises adata collector placed in a goaf and used for collecting data, a signal amplification device used for amplifying signals, a device protector used for protecting the data collector and the signal amplification device, a downhole data receiving station used for receiving data information, a ground control panel used for controlling the data collection system and storing and displaying the collecteddata, a downhole movable control panel and a tracer gas release device used for releasing tracer gas to the goaf. According to the wireless interactive goaf multi-field coupling data collection systemand the using method, the data such as a pressure field, a seepage field, a velocity field, a gas concentration field and a temperature field of the goaf in the mining process of a working surface can be collected, and basic data can be provided for research of analyzing a mutual effect law of the fields of the goaf, giving the temperature rising characteristics of spontaneous combustion oxidation of residual coal in the goaf with the universality, and formulating efficient prevention measures of spontaneous combustion of the residual coal. According to the wireless interactive goaf multi-field coupling data collection system and the using method, site selection at goaf inner measuring points is more flexible, device installation is more convenient, the number of the measuring points canbe set freely, the stability of the system is more reliable, and data collection is more timely and accurate. Therefore, the device is low in cost and convenient to operate, and has 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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