METHOD OF STRESS CONCENTRATION RELATIVE CHANGES MEASURING IN FRONT OF MINING FACE FRONT Russian patent published in 2016 - IPC E21C39/00 

FIELD: data processing.

SUBSTANCE: method consists in fact that managing-recording server records oscillations measuring signals from three-dimensional geophone measuring probes installed in entries adjacent to longwall face, synchronously spatially oriented in all measuring channels and in synchronized time interval, as well as in close correlation with signals, informing on cleaning machine operation mode and location in working face and on this basis, during interaction with server localizes seismic phenomena. After cutter-loader each cut cutting analysis of relative changes of stress in coal massif is carried out in front of mining face front by seismic amplitude tomography weakening-attenuation using recorded wave energy. After cutting when loader is stationary, performing active seismic speed or amplitude tomography by illumination of rock mass between gates adjacent to longwall by means of seismic waves, caused by actuation of remote launched from mine surface, by means of converting server pulse oscillations exciters. Stress analysis is performed by passive seismic velocity or amplitude tomography method, using translucent seismic wave shocks as source of vibrations, caused by mining development.

EFFECT: then stresses relative changes concentration averaged tomographic map is periodically complied, and separate types of tomography maps are complied.

6 cl, 4 dwg