Static and dynamic combined intelligent pre-warning anchor rod

Abstract

The invention relates to a static and dynamic combined intelligent pre-warning anchor rod. The intelligent pre-warning anchor rod consists of a hollow grouting rod body (1) and a solid rod body (3) which are sleeved together through a sleeve (2) and are bonded and anchored to wall rock of a hole wall, wherein the sleeve (2) is not bonded to the wall rock of the hole wall; the solid rod body (3) can penetrate through a large internal diameter section of the sleeve (2), but part of the rod body cannot penetrate through a small internal diameter section of the sleeve (2); a displacement sensor (10) is fixed in the sleeve, and is connected with an intelligent pre-warning device (12) outside an anchor hole by penetrating through a communication wire (11) of the hollow grouting rod body (1); and the displacement sensor (10) can be a mechanical wheel, an ultrasonic range finder or an infrared range finder and the like. On the basis of the original static and dynamic combined anchor rod, the static and dynamic combined intelligent pre-warning anchor rod is provided with functions of intelligent measurement and pre-warning, can realize continuous and reliable supporting, safe monitoring and pre-warning in the field of surrounding rock dynamic disaster monitoring and control, and is suitable for market popularization and application.

Description

technical field [0001] The invention relates to a support and real-time monitoring and early warning equipment for hard and brittle surrounding rock caverns, in particular to a dynamic and static combined anchor rod with early warning function for preventing and controlling dynamic disasters in surrounding rock, belonging to the field of geotechnical engineering anchoring. Background technique [0002] Surrounding rock dynamic disaster is a complex safety problem in underground rock mass engineering in deep working environment. It is a dynamic instability failure induced by certain factors after excavation and unloading of hard and brittle surrounding rock with complete structure in high ground stress environment. The dynamic characteristics of the sudden and violent ejection, throwing, ejection and flaking of the cave wall to the excavation space have the characteristics of hysteresis, continuity, suddenness, violence and hazards, which seriously threaten the underground Sa...

AI Technical Summary

Problems solved by technology

The outstanding disadvantages of the drilling cuttings method are the danger of the operator during the implementation process, the operational errors that vary from person to person, and the inability to continuously monitor, which leads to the omission of useful information and false positives

Using the acoustic emission (microseismic) monitoring method requires drilling to install monitoring probes, which will cause further damage and impact on the surrounding rock. The installation and monitoring process is relatively cumbersome and expensive, and the sensor must be well coupled with the surrounding rock. The quality requirements are high, and blasting and mechanical equipment also interfere with the monitoring results

The above two methods cannot realize non-destructive real-time monitoring and early warning of rockburst in surrounding rock

For this reason, Patent No. 01272808.X discloses a coal-rock dynamic disaster electromagnetic radiation monitoring device, which can realize non-destructive (non-contact) and positioning monitoring, but due to the complexity of groundwater and electromagnetic environments in some mines, the monitoring results are relatively limited. large impact, resulting in large errors in monitoring results

Patent No. 201110109285.9 discloses a method of non-destructive real-time magnetic monitoring and prediction of rockburst in deep surrounding rocks, but the prediction accuracy of this method is unconvincing in the absence of theoretical and experimental research

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