In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing method
The proposed 2000-meter-deep auxiliary shaft at the Xiling mine, Sanshan Island, Shandong Province, is an ultra-deep shaft construction project. Revealing the characteristics of the in-situ stress field in the shaft construction area is one of the necessary prerequisites for the design and construct...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Institute of Geomechanics, Chinese Academy of Geological Sciences
2023-06-01
|
| Series: | Dizhi lixue xuebao |
| Subjects: | |
| Online Access: | https://journal.geomech.ac.cn//article/doi/10.12090/j.issn.1006-6616.20232911 |
| _version_ | 1827892148599521280 |
|---|---|
| author | ZHU Mingde WANG Zhaoya ZHANG Yuezheng LI Wenguang HOU Kuikui JI Hongguang YIN Yantian FU Zhen HAO Yingjie |
| author_facet | ZHU Mingde WANG Zhaoya ZHANG Yuezheng LI Wenguang HOU Kuikui JI Hongguang YIN Yantian FU Zhen HAO Yingjie |
| author_sort | ZHU Mingde |
| collection | DOAJ |
| description | The proposed 2000-meter-deep auxiliary shaft at the Xiling mine, Sanshan Island, Shandong Province, is an ultra-deep shaft construction project. Revealing the characteristics of the in-situ stress field in the shaft construction area is one of the necessary prerequisites for the design and construction of the shaft. We measured the in-situ stress in the deep shaft by hydraulic fracturing method to a depth of 1899.00 m and inverted the 2017.56-meter-deep in-situ stress field in the shaft construction area by numerical simulation. The results show that the maximum horizontal principal stress (SH) ranges from 23.16 to 70.86 MPa, and the minimum horizontal principal stress (Sh) from 15.24 to 47.06 MPa in the depth range from 357.76 to 1899.00 m in the borehole tested by hydraulic fracturing; the principal stress increases nearly linearly with depth, and the measured maximum horizontal principal stress directions in the measured boreholes are NW 55.5°, NW 60.4°, and NW 58.4°, respectively. Horizontal stress mainly dominates the stress field in the shaft engineering area, the vertical stress (Sv) below 1200.00 m is the intermediate stress, and the average value of the ratio of SH to Sv is 1.53. The in-situ stress field distribution pattern in the well-construction area with depth and stratigraphic changes is obtained by inversion analysis of FLAC 3D software. The inversion results are basically consistent with the measured values. It provides the fundamental scientific basis for shaft wall design and engineering risk assessment of shaft projects. |
| first_indexed | 2024-03-12T21:36:36Z |
| format | Article |
| id | doaj.art-8c1ac6eff6974a26ac33098959cfa11a |
| institution | Directory Open Access Journal |
| issn | 1006-6616 |
| language | zho |
| last_indexed | 2024-03-12T21:36:36Z |
| publishDate | 2023-06-01 |
| publisher | Institute of Geomechanics, Chinese Academy of Geological Sciences |
| record_format | Article |
| series | Dizhi lixue xuebao |
| spelling | doaj.art-8c1ac6eff6974a26ac33098959cfa11a2023-07-27T06:30:08ZzhoInstitute of Geomechanics, Chinese Academy of Geological SciencesDizhi lixue xuebao1006-66162023-06-0129343044110.12090/j.issn.1006-6616.20232911In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing methodZHU MingdeWANG Zhaoya0ZHANG YuezhengLI Wenguang1HOU KuikuiJI HongguangYIN YantianFU ZhenHAO YingjieSanshandao Gold Mine of Shandong Gold Mining Industry Co., Ltd., Laizhou 261400, Shandong, ChinaSanshandao Gold Mine of Shandong Gold Mining Industry Co., Ltd., Laizhou 261400, Shandong, ChinaThe proposed 2000-meter-deep auxiliary shaft at the Xiling mine, Sanshan Island, Shandong Province, is an ultra-deep shaft construction project. Revealing the characteristics of the in-situ stress field in the shaft construction area is one of the necessary prerequisites for the design and construction of the shaft. We measured the in-situ stress in the deep shaft by hydraulic fracturing method to a depth of 1899.00 m and inverted the 2017.56-meter-deep in-situ stress field in the shaft construction area by numerical simulation. The results show that the maximum horizontal principal stress (SH) ranges from 23.16 to 70.86 MPa, and the minimum horizontal principal stress (Sh) from 15.24 to 47.06 MPa in the depth range from 357.76 to 1899.00 m in the borehole tested by hydraulic fracturing; the principal stress increases nearly linearly with depth, and the measured maximum horizontal principal stress directions in the measured boreholes are NW 55.5°, NW 60.4°, and NW 58.4°, respectively. Horizontal stress mainly dominates the stress field in the shaft engineering area, the vertical stress (Sv) below 1200.00 m is the intermediate stress, and the average value of the ratio of SH to Sv is 1.53. The in-situ stress field distribution pattern in the well-construction area with depth and stratigraphic changes is obtained by inversion analysis of FLAC 3D software. The inversion results are basically consistent with the measured values. It provides the fundamental scientific basis for shaft wall design and engineering risk assessment of shaft projects.https://journal.geomech.ac.cn//article/doi/10.12090/j.issn.1006-6616.20232911deep shaftdeep stratahydraulic fracturingin-situ stress measurementin-situ stress inversion |
| spellingShingle | ZHU Mingde WANG Zhaoya ZHANG Yuezheng LI Wenguang HOU Kuikui JI Hongguang YIN Yantian FU Zhen HAO Yingjie In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing method Dizhi lixue xuebao deep shaft deep strata hydraulic fracturing in-situ stress measurement in-situ stress inversion |
| title | In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing method |
| title_full | In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing method |
| title_fullStr | In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing method |
| title_full_unstemmed | In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing method |
| title_short | In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing method |
| title_sort | in situ stress measurement and inversion analysis of the deep shaft project area in sanshan island based on hydraulic fracturing method |
| topic | deep shaft deep strata hydraulic fracturing in-situ stress measurement in-situ stress inversion |
| url | https://journal.geomech.ac.cn//article/doi/10.12090/j.issn.1006-6616.20232911 |
| work_keys_str_mv | AT zhumingde insitustressmeasurementandinversionanalysisofthedeepshaftprojectareainsanshanislandbasedonhydraulicfracturingmethod AT wangzhaoya insitustressmeasurementandinversionanalysisofthedeepshaftprojectareainsanshanislandbasedonhydraulicfracturingmethod AT zhangyuezheng insitustressmeasurementandinversionanalysisofthedeepshaftprojectareainsanshanislandbasedonhydraulicfracturingmethod AT liwenguang insitustressmeasurementandinversionanalysisofthedeepshaftprojectareainsanshanislandbasedonhydraulicfracturingmethod AT houkuikui insitustressmeasurementandinversionanalysisofthedeepshaftprojectareainsanshanislandbasedonhydraulicfracturingmethod AT jihongguang insitustressmeasurementandinversionanalysisofthedeepshaftprojectareainsanshanislandbasedonhydraulicfracturingmethod AT yinyantian insitustressmeasurementandinversionanalysisofthedeepshaftprojectareainsanshanislandbasedonhydraulicfracturingmethod AT fuzhen insitustressmeasurementandinversionanalysisofthedeepshaftprojectareainsanshanislandbasedonhydraulicfracturingmethod AT haoyingjie insitustressmeasurementandinversionanalysisofthedeepshaftprojectareainsanshanislandbasedonhydraulicfracturingmethod |