Roadway surrounding rock deformation full-space real-time monitoring device and construction technology

Abstract

The invention relates to a roadway surrounding rock deformation full-space real-time monitoring device and a construction process. The roadway surrounding rock deformation full-space real-time monitoring device comprises a roadway, an optical fiber, an anchoring structure, an anchoring structure rubber cushion plate, an optical fiber buckle, an optical fiber concrete spraying layer, an optical fiber monitoring system and an optical fiber arrangement process. The optical fibers are horizontally arranged on the left side, the right side and the bottom plate of the roadway in the axial direction of the roadway. The optical fiber is annularly arranged along the roadway from the roadway top plate, the left side, the bottom plate and the right side to the roadway top plate, the optical fiber is led out from the roadway top plate along the axial direction and extends to be arranged at the next roadway annular monitoring position, and the roadway annular optical fiber arrangement process is repeated so as to meet the requirement for roadway annular and roadway top plate full-space strain monitoring. When arranged along the left side and the right side of the roadway, the optical fiber surrounds the anchoring structure rubber cushion plate to monitor deformation of the anchoring structure and supporting surrounding rock. The optical fibers are fixed on the surface of the roadway through the optical fiber buckles, the optical fibers are sprayed and buried in the surface of the roadway through the optical fiber concrete spraying layer, and roadway surrounding rock full-space deformation is monitored in real time through the optical fiber monitoring system.

Description

technical field [0001] The invention relates to the field of roadway surrounding rock deformation and damage monitoring, in particular to a full-space real-time monitoring device and construction technology for roadway surrounding rock deformation. Background technique [0002] During the excavation of the roadway, the stress state of the rock mass has been changing, the stress of the surrounding rock of the roadway is redistributed, the tangential stress increases, the radial stress decreases, the principal stress difference increases, the shear stress in the surrounding rock increases, and the stress accumulates to To a certain extent, the surrounding rock will be displaced and deformed towards the free surface of the roadway, and large deformation characteristics such as top subsidence, bottom drum, and two-gang shrinkage will occur frequently. In addition, with the progress of the mining operation of the working face, the mining roadway will also have a strong mine press...

AI Technical Summary

Problems solved by technology

[0003] The traditional roadway surrounding rock deformation monitoring is to manually use a steel (leather) tape to measure the data difference or arrange a convergent meter in the limited space of the roadway, and judge the deformation of the surrounding rock by the change of the value before and after the monitoring. This process consumes manpower and the monitoring is not timely enough. , The monitoring range is small and only limited to some areas of the monitoring range, the manual measurement statistics have large errors, and it is difficult to eliminate the sudden danger caused by the accumulation of deformation during the measurement process

In addition, the traditional deformation monitoring of anchorage structures such as bolts and anchorages uses a hydraulic dynamometer device. The monitoring data range of this device is small, and the monitored data cannot well reflect the stress changes in a large range of surrounding rock around the anchorage structure.

The existing roadway optical fiber installation technology adopts the method of drilling installation. According to the drilling depth, a certain number of meters of optical fiber is intercepted, and the optical fiber is sprayed and buried after being put into the drilled hole to fix the installed optical fiber. The monitoring range of this operation is small and discontinuous. It is impossible to monitor the range of all-space lanes, and the process operation is complicated and consumes too much time, manpower, and material resources

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