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Three-dimensional discrete element analysis of the excavation face stability of deep-buried shield tunnels
Published 2025-02-01Subjects: Get full text
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Evolution Law of Overburden Longitudinal Connected Fissures in a Shallowly Buried Coal Face with Thin Bedrock
Published 2019-01-01“…Longitudinal connected fissures in a shallowly buried coal face with thin bedrock are the main factor causing sand-burst accidents, water-burst accidents, and abnormal increases in water inflow. …”
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Research on Surface Failure Law of Working Faces in Large Mining Height and Shallow Buried Coal Seam
Published 2020-01-01“…To study the influence of overlying rock movement on surface failure of near-field single key strata of near-shallow buried and large mining height working face, the relationship between overburden movement, strata pressure appearance, and surface failure at working face 52307 in Daliuta mining area was analyzed by field measurement and numerical simulation. …”
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Research on Damage Assessment of Buried Standard and Carbon-Fibre-Reinforced Polymer Petroleum Pipeline Subjected to Shallow Buried Blast Loading in Soil
Published 2021-01-01“…In this study, under fixed end constraints, experimental analysis and numerical simulations were combined to assess the damage of a standard petroleum pipeline and a CFRP petroleum pipeline buried in soil under blast loading. The results showed that, for a scaled distance of 0.19 m/kg1/3, plastic deformation occurred on the surfaces of the two pipelines facing the explosive. …”
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Active phase compensation technique for buried target extraction
Published 2017-03-01“…The range migration algorithm (RMA) is the conventional method for synthetic aperture radar (SAR) image reconstruction, but if targets exist in different media, identification of the target can be difficult because of losses and the significant reflection from the boundary face. In this regard, the matrix pencil method is utilised to actively find the boundary point and buried target responses. …”
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Failure Mechanisms and the Control of a Longwall Face with a Large Mining Height within a Shallow-Buried Coal Seam
Published 2021-01-01“…Correspondingly, in the western part of the country, the mining heights of longwall faces in shallow-buried coal seams have shown an increasing trend, resulting in enhanced mining efficiency. …”
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Nano-Perforated Silicon Membrane with Monolithically Integrated Buried Cavity
Published 2025-01-01“…Existing fabrication methods are suitable for many desired geometries, but face challenges related to mechanical robustness and fabrication complexity. …”
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Additional Stress on a Buried Pipeline under the Influence of Coal Mining Subsidence
Published 2018-01-01“…Furthermore, based on the ground subsidence along the pipeline predicted in advance by the probability integral method, the additional stresses and Von Mises equivalent stresses and their distributions along the buried pipeline induced by the exploitation of a coal mining working face named 14101 were obtained. …”
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Study on Seismic Dynamic Response of Deep-Buried Tunnel Based on Tectonic Stress
Published 2022-01-01“…Since the construction of tunnels in this region faces a seismic hazard, it is necessary to explore the seismic responses of related construction areas there. …”
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Associated Factors of Postpartum Modern Contraceptive Use in Burie District, Amhara Region, Ethiopia
Published 2020-01-01“…Data were collected using face to face interviewer administered structured questionnaires. …”
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Robust Wiener filter‐based time gating method for detection of shallowly buried objects
Published 2021-02-01“…Abstract A robust method for ultra‐wideband (UWB) imaging of buried shallow objects based on time gating, Wiener filtering, as well as constant false alarm rate (CFAR) is proposed. …”
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Research on Dynamic Response of Shallow Buried Tunnel Lining Constructed by Drilling and Blasting Method
Published 2022-01-01“…To study the dynamic response of shallow buried tunnel lining by drilling and blasting method, ABAQUS simulation software was used to establish a tunnel blasting finite element model based on the consideration of in situ stress. …”
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Numerical Study on the Movement Laws of Overlying Strata in Shallow-Buried Stope Based on the Goaf Compaction Effect
Published 2021-01-01“…The simulation indicates that the fracture zone volume is 1.7-1.8 times that of the caving zone in the 31108 working face, and the failure volume of the overlying strata is 9-10 times that of the stope. …”
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Characteristics of Stratum Structure and Fracture Evolution in Stratified Mining of Shallow Buried High-Gas-Thick Coal Seam by Similarity Simulation
Published 2021-01-01“…When a small-size section coal pillar (less than 10 m) is used, the complex rock structure evolution and fissure development characteristics during the stratified mining of shallow buried thick coal seam will directly affect the movement of gas transportation between the working face and the goaf and will directly affect the safety of the working face. …”
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Study on the mechanism and control of strong ground pressure in the mining of shallow buried close-distance coal seam passing through the loess hilly region
Published 2025-01-01“…Abstract Shallow buried close-distance coal seam (SBCCS) is widely found in northern Shaanxi, China. …”
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Efficient Excavation and Support Cooperation Technology for Surrounding Rock of Deep Buried Long-Distance and Large Section Gob-Side Roadway: A Case Study
Published 2022-01-01“…This paper puts forward the time-effect collaborative control countermeasures of the roof and rib in gob-side roadway of “hole collapse anchor cable of solid coal rib lag construction and waits for pressure relief and rapid excavation-support cycle in the heading face.” Engineering practice shows that the mine pressure behavior of roadway roof and solid coal rib is effectively controlled, and the roadway forming speed is greatly improved, which can provide reference for the efficient excavation-support design of gob-side roadway under the conditions of deep buried, long-distance, and large section in similar deep mines.…”
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New insight into the controlling factors of differences in carbonate buried-hills driven by tectonic activity: a case study of the Weixinan Sag, Beibuwan Basin, China
Published 2025-01-01“…Based on this, divide karst facies zones, measure karst thickness, and analyze their distribution patterns. …”
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Study on scour simulation and boundary condition conversion technology for a shallow foundation bridge
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