Principle of NZ series shallow seismograph and maintenance of troubles;

R24 shallow seismograph troube-shooting;

Expanding capacity of acquisition channels of R24 shallow seismograph.;

Combining the result of shallow seismic exploration, the occurring locations of ore bodies, the surface structure and the structu.

Furthermore, by applying the shallow seismic exploration, combined geochemical exploration (primary halo, soil halo and partial extraction), the deep prospecting targets have been delineated and the accordant result between geophysical and geochemical anomalies has been achieved, which supplies reliable evidence f.

According to the application of ES 1225 shallow seismic detector in many large national communications engineers, the author suggests that the below problems can be solved with shallow earthquake reflection shooting.

An advanced technology, method and characteristic of shallow seism with developed countries is intreduced, analyzed present problems and fall short with an application of shallow seism method in China are analyzed and point out its tremendous potential and wide used prospects on geologic engineering and groundwater environment in our nation is pointed out.

Aiming at the problems of geological defects in the process of road detecting engineering, the exploration uses shallow seismic reflection wave method to divide the boundary of the soft-soil foundation, summarizes its characteristics and rules in seismic exploration, and analyses the interpreting results in detail.

Basic principles and techniques for the shallow seismic refraction wave method and the high-density resistivity method are described in this paper in combination with engineering practice to explain the results of the refraction wave method and the high-density resistivity method in railroad and highway tunnel exploration.