A New Method of Dynamic Matching Test for Rock Stress Gauges-One-dimensional Impact Test

A new method of dynamic matching test for rock stress gauges is introduced in this paper. It is based on the principle similar to that of Hopkinson pressure bar. This method is simple, inexpensive and practical. It can be used not only to measure the dynamic matching coefficient of stress gauge but also to determine experimentally the dynamic measuring performances of stress gauge in solid media. The aesign principle of the equipment, the measuring systems and test results are described. This method can be also used to measure the decay of one-demensional stress wave propagating in the rock or concrete specimen in laboratory.