Rock stratum bidirectional displacement monitoring device and monitoring method

Abstract

The invention relates to a rock stratum bidirectional displacement monitoring device which comprises an anchor head and a reading device. The reading device comprises a first spring, a second spring and scales for monitoring stretching quantities of the first spring and the second spring, wherein the first spring and the second spring do not interfere with each other. The anchor head is connected with a first lead connected with the movable end of the first spring; the first lead is provided with a friction buckle; a friction pair is formed by the friction buckle and the first lead; and the friction buckle is connected with a second lead connected with the movable end of the second spring. The invention also relates to a rock stratum bidirectional displacement monitoring method. According to the invention, by simulating the stretching quantity of the first spring, a total displacement generated by a positive displacement of a abscission layer of a rock stratum and a squeezing density negative displacement is monitored; by simulating the stretching quantity of the second spring, a negative displacement of the rock stratum is monitored; the technical difficult problem that a mechanical displacement monitoring device can only be used for monitoring a unidirectional displacement is broken through; and the rock stratum bidirectional displacement monitoring device and the rock stratum bidirectional displacement monitoring method are simple and convenient to implement, provide accurate and reliable field data for analysis on the activity rhythm, the collapse mode and the like of the rock stratum and have good popularization and application prospects. The rock stratum bidirectional displacement monitoring device and the rock stratum bidirectional displacement monitoring method can be applied to geotechnical engineering.

Description

technical field [0001] The invention relates to geotechnical engineering, in particular to a two-way displacement monitoring device and a monitoring method for invisible deep rock formations. Background technique [0002] In geotechnical engineering, the displacement of deep rock formations is complex and concealed. There are mainly electronic and mechanical types of rock displacement monitoring devices in use. [0003] Electronic monitoring devices can complete positive and negative two-way monitoring of rock formation displacement, but the cost is high and the failure rate is high, which is not conducive to large-scale application. However, the currently used mechanical displacement monitoring instruments are mainly unidirectional displacement meters, which cannot complete two-way displacement monitoring. This kind of displacement meter can record the total displacement of the rock formation within a period of time, and whether the total displacement during this period is...

AI Technical Summary

Problems solved by technology

[0003] The electronic monitoring device can complete the positive and negative two-way monitoring of rock formation displacement, but the cost is high and the failure rate is high, which is not conducive to large-scale application

However, the currently used mechanical displacement monitoring instruments are mainly one-way displacement meters, which cannot complete two-way displacement monitoring.

This kind of displacement meter can record the total displacement of the rock formation within a period of time, and whether the total displacement during this period is a single positive abscission displacement or accompanied by a negative extrusion compaction displacement cannot be determined from the observation results. judge

However, this will inevitably lead to errors in the judgment of the law of rock formation activity.

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