Second generation of conical strain gauge probe for stress measurement in rock massif

Title:

Second generation of conical strain gauge probe for stress measurement in rock massif

Creator:

Jaromír Knejzlík, Rambouský, Zdeněk, Kamil Souček, and Staš, Lubomír

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:33d5c6fd-f372-4927-88b4-355065754cfd
uuid:33d5c6fd-f372-4927-88b4-355065754cfd
issn:1214-9705

Subject:

Geologie. Meteorologie. Klimatologie, geodynamika, geodynamics, stress measurement, over-coring, 7, and 551

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

Compact conical strain gauge probe for borehole over-coring rock massif stress measurement (CCBO), based on experiences of K. Sugavara and Y. Obara, has been developed in Institute of Geonics ASCR, v.v.i. from 2004. First generation of CCBO is equipped by simple electronic circuit which requires continuous communication with control computer in the course of measurement. Prototypes of this type probes are used for long term stress changes monitoring induced by longwall advancement in mine. Solving of continuous data communication through rotating drilling tool filled by wash water in course of over-coring is very difficult technical task, which is not possible to solve in terms of grant project. To avoid this problem a development of second generation of CCBO equipped by microprocessor and internal data logger was initialised. Simplified modification of CCBO is developed as a probe for long-term monitoring of rock massif stress changes (Compact Conical Ended Borehole Monitoring - CCBM). Design of both models probes, discussion of measurement errors and technique of sensitivity self-calibration is described., Jaromír Knejzlík, Zdeněk Rambouský, Kamil Souček and Lubomír Staš., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Acta geodynamica et geomaterialia : | 2008 Volume:5 | Number:3 (151)

Harvested from:

CDK

Metadata only:

false