深部岩盤における初期応力測定プローブの改良および原位置適用試験

• Material Type: 文書・図像類
• Title: 深部岩盤における初期応力測定プローブの改良および原位置適用試験
• Author/Editor: 加藤 春實
• Author Heading: 加藤 春實
• Publication Date: 2003-03
• Publication Date (W3CDTF): 2003-03
• Alternative Title: Inprovement of an automatic in situ stress measurement probe and it's application in the field test
• Periodical title: JNC TJ7410 2003-003
• Text Language Code: jpn
• Target Audience: 一般
• Note (General): 東濃鉱山02SE-04号孔において深部岩盤における初期応力測定プローブの原位置適用試験を実施した。本試験を実施するにあたって,新たにワイヤラインタイプのプローブ運搬・切り離し装置を開発した。しかしながら5深度で実施した試験は天然き裂のために正常な解放ひずみは測定できなかったものの,深部岩盤を対象とした応力解放法による初期応力測定の作業効率を格段に高めることができた。; The overcoring tests in the vertical borehole 02SE-04 (a standard HQ-WL) were made at depths of 122.7m, 142.7m, 157.0m, 173.5m and 192.0m by using modified equipments and an automatic probe developed by Japan Nuclear Cycle Development Institute (JNC). By adopting a newly developed wire line type probe carrier and pilot hole drilling tool, it was ensured that quick accomplishment of steps followed during overcoring at great depth was possible. Modifications to a glue capsule were carried out to achieve successful grouting of the SI cell in the pilot hole at great depths. Since cracks developed along the planes of weakness during the overcoring, none of the tests at the five depths provided valid measurement. In order to determine the elastic properties of the overcore and epoxy cement, cyclic loading test was made. The test reviled that the core taken down to a depth of 160m possessed plastic property. It was also found that long periods of up to three days were required for the epoxy cement extruded in the pilot hole to change into elastic material. Hydraulic fracturing tests were also conducted in the borehole 02SE-04 at depths ranging from 125.8m to 168.0m. At two depths, fractures parallel to the borehole axis were induced. The test results indicated that the stress regime at the two depths was reverse faulting tectonic environment (Sv$<$Sh$<$SH+) and the orientation of the hydraulic fracture trace in 02SE-04 was found to give an average azimuth for the maximum horizontal stress SH of N60°E.
• Source: /JNC-TJ7410-2003-003.pdf （fulltext）; https://jopss.jaea.go.jp/pdfdata/JNC-TJ7410-2003-003.pdf
• Access Restrictions: 限定公開
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 日本原子力研究開発機構 : JOPSS:JAEA Originated Papers Searching System

• Summary, etc.: 東濃鉱山02SE-04号孔において深部岩盤における初期応力測定プローブの原位置適用試験を実施した。本試験を実施するにあたって,新たにワイヤラインタイプのプローブ運搬・切り離し装置を開発した。しかしながら5深度で実施した試験は天然き裂のために正常な解放ひずみは測定できなかったものの,深部岩盤を対象とし...