SYSTEM FOR DYNAMICALLY MONITORING ROADWAY ROOF SEPARATION BASED ON FIBRE GRATING AND PRE-WARNING METHOD

摘要

#$%^&*AU2017204543A120170727.pdf#####A system for dynamically monitoring roadway roof separation based on a fibre grating and a prewarning method, which belongs to the field of mine safety monitoring. Three parts, i.e., a ground data processing and control sub-system, a downhole data transmission communication sub-system and a downhole sensing data collecting sub-system are comprised: the ground data processing and control sub-system is placed in a ground control centre room, and is composed of a ground upper master monitoring computer, a fibre grating demodulation apparatus and a power supply; the downhole data transmission communication sub-system is composed of a mining transmission fibre and a fibre junction box; and the downhole sensing data collecting sub-system comprises at least one apparatus for monitoring fibre grating roof separation. The real-time online dynamic consecutive measurement of roof separation is realized, a transformation circumstance of a roadway surrounding rock is obtained, and the rationality of a bolting support parameter is verified. Once the pre-warning threshold of separation is exceeded, a pre-warning signal can be sent correctly, so that measures can be taken in time, and roof collapse can be prevented, which is of great importance for the outer roof separation size and the roadway stability in an anchorage zone.