SOME PROBLEMS OF IN-SITU CRUSTAL STRESS MEASUREMENTS

Measuring data at home and abroad confirm that tectonic stress near the surface is interfered with by several influence factors and is usually overlapped by non-tectonic stress,e.g.stress caused by topography.This paper discusses the problems that need consideration before and after crustal str ess measurements.Before the measurements,we should give full consideration to the determination of measuring sites and the influences of landforms,rock types,fractures and so on.After the measurements,an analysis on the various influence factors and reliability of measuring values and correction and comparative analysis of the mechanical properties of rocks,as well as a representative analysis of the measuring values are necessary.