Development status of instruments for in-seam seismic exploration

Developing the high performance ISS exploration instrument will effectively promote the effective application of ISS exploration method in the field of coal mine geological structure survey. Based on the analysis of ISS exploration and the comparison of a new type of special seismic acquisition station of trough wave at home and abroad, it can be found that storage type radio telemetry seismic instrument is the main development direction of ISS exploration instrument. The data collecting stations of new seismic instruments all have 24 bit Δ-Σ AD converter and adjustable pre-gain. The performance of data collecting station can meet the need of ISS exploration, but the performance of geophone determines the accuracy and the fidelity of in-seam wave signal collected by ISS exploration instrument. Based on the principle and performance of six different types of geophone, it can be found that the research of geophone is mainly aimed at three aspects, improving sensitivity, broadening the frequency response range and enhancing anti interference ability. The high performance piezoelectric geophone has good application prospects in the trough wave seismic exploration. In addition, test results of a new type of piezoelectric geophone core were presented.