Coal spontaneous combustion downhole detection system and method based on self-potential method

A coal spontaneous combustion downhole detection method based on a self-potential method, comprising the following steps:

• S1, digging a plurality of electrode baths in the top plate area of the goaf roadway according to the roadway length;
• S2, welding the measuring electrodes to the metal anchor rods, and then connecting and protecting the measuring electrodes, the low pass filter and the data acquisition card sequentially;
• S3, burying the measuring electrodes into the electrode baths of the top plate through fixing the measuring electrodes with the metal anchor rods, and transmitting signals wirelessly;
• S4, enabling the self-potential processing apparatus to give a command to each data acquisition card to collect the information of each measuring electrode, and storing the information in the data acquisition card temporarily;
• and
• S5, utilizing the characteristic that the metal anchor rods can enhance signal transmission to transmit the information in the data acquisition card to a data processing sensor in the self-potential processing apparatus, enabling the data processing sensor to process the information according to the collecting time, the serial number of the measuring electrodes, the size of the self-potential signal, and the relationship between the self-potential signal and temperature, and transmitting the processed data to an imaging sensor to convert the data into images.