Research on Movement Monitoring and Law of Overlying Strata in Goaf Based on IMU Technology

The overlying strata of the stope can be divided into low ( immediate roof ), medium and high according to degree influence mine pressure behavior working face. Among them, step distance rock judged appearance hydraulic support, middle not accurately intuitively determined only by theoretical calculation. Therefore, IMU is used monitor motion state fracture different layers, so as study relationship between them periodic weighting. Firstly, accuracy monitoring effect error data are indoor test. Then, taking 52507 face Daliuta engineering background, 3DEC software assist verification. research shows that meets requirements accuracy, movement ; period at heights different. As height increases, displacement gradually median play a key role in strata. monitored twice actual pressure.