SAFECOMINE INTRINSICALLY SAFE SYSTEM FOR MONITORING OF HAZARDS IN MINES RELATED TO DISTURBANCE OF THE STRATA AND ENVIRONMENT EQUILIBRIUM

摘要

A structure and operating of SAFECOMINE - intrinsically safe system for monitoring of risk in mines, related to disturbance of the strata and environment equilibrium have been described. The system has a modular structure and consists of several cooperating sub-systems: seismo-acoustic ARES-5/E, seismic ARAMIS M/E, GEOTOMO/E and seismic at surface ARP 2000 P/E. The sub-systems record current physical parameters (velocity and acceleration) of spatial vibration field of the strata. The excitation of spatial vibration field can be resulted by the group of natural events connected with fracture of the strata, like: bumps accompanied by vibrations as well as by subsidence on surface. The information recorded by the measurement network consisted of sub-systems placed on the area of one or more mines can be integrated in time by the use of time markers generated by GPS clock. The system controls risk on the area of mine with special attention to longwalls. By the use of seismic, seismo-acoustic and small diameter borehole-drilling methods the system allows for comprehensive assessment of rock bumps risk in areas of workings. The system allows for determination of the stress concentration area in front of the longwall by the use of attenuation-tomography methods, where the shearer is used as a source of imaging wave. Passive tomography and natural seismic events are the second method used by the system for determination of the stress concentration area in front of the longwall. The parts of the system operating in the areas hazarded by methane explosion are intrinsically safe and can be supplied remotely from the surface. Such solution allows the system to keep its metrological functions at any conditions, independently of the underground power-net state. Several dozen of sub-systems from SAFECOMINE were implemented in many Polish mines, some in China and Russia and few in Ukraine.