20.500.12556/DKUM-72663 A geostress measurement method based on an integrated drilling and optical microscopic imaging system Metoda merjenja geostatičnih napetosti, ki temelji na vgrajenem vrtalnem in optično mikroskopskem slikovnem sistemu Conventional geostress measurement methods are limited by deficiencies including the measurable depth, the complexity, and the long duration of operation. To address these problems and achieve the measurement of geostress in deep wells under conditions of complex high pressures and high temperatures, we propose a new measurement method for geostress based on an integrated drilling and optical microscopy system. Its innovative integrated structure eliminates the problems associated with complex procedures and depth limits, and avoids rock creep caused by long delays, significantly improving the accuracy and range of the measurements. It works by using microscopic imaging and direct contact probes to capture the changes of a borehole’s cross-sectional outlines before and after stress relief. The resulting images are analyzed with search circles to obtain the positions of probe apices, which can be fitted into ellipses that describe the outlines, and calculate the state of the stress. The validity and accuracy of the method was verified by in-door tests and field applications in the ZK1 borehole. The results show that: (1) the integrated system can be used to measure micrometer-grade deformations; (2) the searchcircle approach can accurately obtain the positions of probe apices; and (3) the stress measurement method based on the system is accurate and feasible. Konvencionalne metode merjenja geostatičnih napetosti so omejene zaradi pomanjkljivosti, vključno z izmerljivo globino, kompleksnostjo in dolgim trajanjem izvedbe. Da bi rešili te probleme in dosegli merjenje geostatičnih napetosti v globokih vodnjakih v pogojih kompleksnih visokih tlakov in visokih temperatur, je predlagana nova merilna metoda za geostatične napetosti na osnovi integriranega sistema vrtanja in optičnega mikroskopa. Njena inovativna integrirana konstrukcija odpravlja probleme, povezane s kompleksnimi postopki in globinskimi omejitvami, ter se izogiba lezenju kamnin zaradi dolgotrajnosti postopka, kar bistveno izboljša natančnost in obseg meritev. Deluje s pomočjo mikroskopskega slikanja in neposrednimi sondami, da zajame spremembe zunanje površine prereza vrtine pred in po zmanjšanju napetosti. Rezultirajoče slike se analizirajo z iskalnimi krogi, da se pridobijo položaji vrhov sond, ki so lahko vstavljeni v elipse, ki opisujejo obrise, in izračunajo stanje napetosti. Veljavnost in natančnost metode sta bili preverjeni z laboratorijskimi preizkusi in aplikacijami na terenu v vrtini ZK1. Rezultati kažejo, da: (1) se integrirani sistem lahko uporablja za merjenje mikrometerskih deformacij; (2) pristop iskalnega kroga lahko natančno pridobi položaje vrhov sond; (3) metoda merjenja napetosti, ki temelji na tem sistemu, je točna in izvedljiva. geostress probe optical microscopy measurement while drilling search circle geostatična napetost sonda optična mikroskopija merjenje med vrtanjem iskalni krog true false true Angleški jezik Slovenski jezik Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru Znanstveno delo 2018-10-11 11:54:01 2018-10-11 12:02:03 2023-07-31 12:18:06 2019-07-11 19:26:28 2018 0 0 str. 17-27 št. 1 Letn. 15 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1854-0171 215987712 305146880 10.18690/actageotechslov.15.1.17-27.2018 1854-0171 URN:SI:UM:DK:8BVLUJFU Acta_geotechnica_slovenica_2018_Wang_et_al._A_geostress_measurement_method_based_on_an_integrated_drilling_and_optical_microscopic_imagi.pdf Acta_geotechnica_slovenica_2018_Wang_et_al._A_geostress_measurement_method_based_on_an_integrated_drilling_and_optical_microscopic_imagi.pdf 1 2340BDDCE54370E85F644EC8EE5134FA 7064772cec079cfa605bf993d5794f5036f983aaf1f1a689ad438ff3e1a4414c 78395643-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/a0531ef8-c741-48a2-9ecd-e5ee91839fa5 https://dk.um.si/Dokument.php?lang=slv&id=131013 http://fgserver6.fg.um.si/journal-ags/2018-1/article-2.asp 1 https://dk.um.si/Dokument.php?lang=slv&id=131011 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Acta geotechnica Slovenica 0 0 0