ROADWAY WALL DISPLACEMENT MEASUREMENT DEVICE AND METHOD

A roadway wall displacement measurement device and method. The device comprises a particle emitting source (1) used for emitting charged particles, a first space used for selecting the charged particles having a specific speed, a particle receiver (8), and a second space used for deflecting the charged particles onto the particle receiver (8); a vertical and downward electric field is provided in the first space, and uniform magnetic fields (6) that are perpendicular to a roadway section and inward are provided in the first space and the second space; the particle receiver (8) is connected to a follower rod (11); the fixed end (13) of the follower rod (11) is inserted into a loose rock layer of a roadway wall. The device and method perform measurement on the amount of creep displacement of the roadway wall according to the laws of motion of the charged particles in a uniform electric field and the uniform magnetic fields (6), thereby being capable of greatly improving the accuracy of a measurement result of t