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Zhang G, Zhou G, Wang L, Li Y, Gu Y, Qu Z, Zhao X, Yin M, Wang F, Zhang L. Study on the mechanism and response law of fracture movement on the super-high position hard-thick strata. Sci Rep 2023; 13:22938. [PMID: 38129470 PMCID: PMC10739810 DOI: 10.1038/s41598-023-49584-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 12/09/2023] [Indexed: 12/23/2023] Open
Abstract
In this paper, a thick plate structural mechanical model was established for the hard-thick rock strata in the Ordos region, which was characterized by the occurrence of high-energy strong earthquakes caused by the fracture of hard-thick rock strata. Subsequently, based on Vlasov's theory, the evolution process of hard-thick rock strata was analyzed. And the paper validated the analysis results using high-energy mine earthquake and surface subsidence data. The following conclusions were drawn: (1) The hard-thick strata in the cretaceous system will not be broken during the advancing and mining process of the test panel of the Shilawusu coal mine. (2) When the test panel is mined to a distance of two panel widths, no fracture occurred in the lower part of the hard-thick strata, because no separated space was formed. (3) When the test panel was advanced to about 856 m, the hard-thick strata have fractured in a vertical direction. (4) No high-energy mine earthquake event has occurred during mining at test panel, and the amount of surface subsidence is approximately 200 mm. (5) In the mining at test panel, two high-energy mining earthquakes occurred at 837 m, 1153 m away from the initial position of the panel, respectively, and the maximum amount of surface subsidence increased to 1397 mm, which accords with the results of the first and periodic breaks calculated by theory. The research results of this paper are of guiding significance for the study of the breaking law of hard-thick strata under similar engineering geological conditions and disaster pre-control.
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Affiliation(s)
- Guangchao Zhang
- State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Huainan, 232001, China
- College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
- Yankuang Energy Group Company Limited, Yanzhou, 272102, China
| | - Guanglei Zhou
- College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Lei Wang
- State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Huainan, 232001, China
| | - You Li
- College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Yingshi Gu
- Yankuang Energy Group Company Limited, Yanzhou, 272102, China
| | - Zhi Qu
- College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Xipo Zhao
- Yankuang Energy Group Company Limited, Yanzhou, 272102, China
| | - Maosheng Yin
- College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Fangfang Wang
- Yankuang Energy Group Company Limited, Yanzhou, 272102, China
| | - Lingzhuo Zhang
- College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
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Application of MEMS-Based Accelerometers for Near-Field Monitoring of Blasting-Induced Seismicity. MINERALS 2022. [DOI: 10.3390/min12050533] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Proper monitoring of seismic risk and reliable evaluation of destress blasting efficiency requires a well-developed seismic network surrounding the analyzed area. Unfortunately, the construction of a dense seismic monitoring system using standard types of seismometers and accelerometers is associated with high costs of seismic network development and maintenance. Significant improvements in this regard may be potentially achieved by replacing expensive monitoring devices with other cost-effective sensors such as MEMS-based accelerometers. Nevertheless, this topic has not been sufficiently investigated yet, and the usefulness of such devices for monitoring seismicity in deep underground mines has not been recognized. The goal of this paper was to perform preliminary measurements of blasting-induced seismicity in the near-wave field with the use of a single three-axial MEMS-based accelerometer and three uniaxial seismometers. The collected seismic records induced by multi-face blasting were compared in time and frequency domains. In the time domain, the values of 3D peak motion plots were analyzed, and the possibility of identification of subsequent delay times in recorded waveforms was investigated. In the case of frequency distribution, the Power Spectrum Density plots were calculated and compared. The results of the analysis proved that MEMS-based accelerometers provide reliable results and may be successfully implemented for regular use in underground seismic monitoring systems.
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Zembaty Z, Bernauer F, Igel H, Schreiber KU. Rotation Rate Sensors and Their Applications. SENSORS 2021; 21:s21165344. [PMID: 34450786 PMCID: PMC8402159 DOI: 10.3390/s21165344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 08/02/2021] [Indexed: 11/21/2022]
Affiliation(s)
- Zbigniew Zembaty
- Faculty of Civil Engineering and Architecture, Opole University of Technology, ul. Prószkowska 76, 45-758 Opole, Poland
- Correspondence:
| | - Felix Bernauer
- Department of Earth and Environmental Sciences, Ludwig Maximilian University, Theresienstr. 41, 80333 Munich, Germany; (F.B.); (H.I.)
| | - Heiner Igel
- Department of Earth and Environmental Sciences, Ludwig Maximilian University, Theresienstr. 41, 80333 Munich, Germany; (F.B.); (H.I.)
| | - Karl Ulrich Schreiber
- Geodetic Observatory Wettzell, Research Unit Satellite Geodesy, Technical University of Munich, 93444 Bad Koetzting, Germany;
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