Rock mass stress monitoring device

Abstract

The invention relates to a stress monitoring device for monitoring stress inside a rock body and a surrounding rock of a roadway. The rock mass stress monitoring device comprises an oil pressure transverter, a transmitter and a collecting instrument, the oil pressure transverter comprises a pressure bearing cover plate and an oil pressure cylinder, an oil cylinder hole is arranged on the oil pressure cylinder, a cylindrical pressure bearing plunger piston is installed in the oil cylinder hole, the upper end of the pressure bearing plunger piston is connected with the pressure bearing cover plate, and a first oil path communicated with the lower end of the oil cylinder hole is arranged on the oil pressure cylinder. The transmitter comprises a transmitter casing and a stress sensor, an oil cavity is arranged on the transmitter casing, the stress sensor is installed in the oil cavity through an installation hole, a second oil path and a third oil path which are communicated with the oil cavity are further arranged on the transmitter casing, the second oil path is communicated with the first oil path through an oil tube, a holding-back valve is further arranged on the third oil path, and the stress sensor is connected with the collecting instrument. The stress monitoring device can rapidly and accurately detect small stress changes in the rock body.

Description

technical field [0001] The invention relates to a measuring device, in particular to a stress monitoring device for monitoring the internal stress of rock masses and roadway surrounding rocks. Background technique [0002] At present, there are many types of sensors and monitors for stress detection in engineering, each with its own characteristics and scope of application. Monitoring and forecasting instruments are rare, especially the real-time automatic monitoring of high precision and large displacement is almost blank. Safety accidents caused by roof fall, bottom sill, rockburst, etc. caused by internal displacement changes of roof (bottom) slabs, coal pillars, etc. Up to now, there is still a lack of reliable instruments capable of real-time automatic monitoring and forecasting. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a real-time rock mass stress monitor with simple structure, convenient operation...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many types of sensors and monitors for stress detection in engineering, each with its own characteristics and scope of application. Monitoring and forecasting instruments are rare, especially the real-time automatic monitoring of high precision and large displacement is almost blank. Safety accidents caused by roof fall, bottom heap, rockburst, etc.

Up to now, there is still a lack of reliable instruments capable of real-time automatic monitoring and forecasting

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