The invention relates to a real-time dynamic measurement and
control system and method for an empty roof distance of a
coal mine tunnel based on
energy feedback. According to the
system, a multi-dimensional monitoring
assembly comprises a
drill hole, a roof multi-dimensional sensing module and a bottom plate reference target; the top plate multi-dimensional sensing module comprises a pressure-bearing shell, a quick-
insertion type anchor rod, an X / Y / Z-direction
stress sensor, a
laser range finder, a processor I and a pre-pressing adjusting nut; the
tail section of the quick-inserting type anchor rod is anchored in a
drill hole, and the pressure-bearing shell is pressed on a top plate through the pre-pressing adjusting nut; the bottom plate reference target is correspondingly mounted on a bottom plate of a roadway; the edge intelligent sensing box is arranged in the roadway and comprises an outer shell and a processor II; the method comprises the following steps: synchronously acquiring X / Y / Z three-dimensional stress data and overhead distance data, sequentially calculating a three-dimensional energy accumulation value, a
safety coefficient and a maximum overhead distance, then carrying out graded early warning, and meanwhile, sending
monitoring data and early warning information to a monitoring
server through a
wireless access point. According to the
system and the method, the roof rock
mass stress and the empty roof distance can be monitored intelligently.