Influence of stress distribution in coal seams of non-uniform extremely thick key stratum and disaster-causing mechanisms [PDF]
Scientific Reports, 2022 This paper analyzes the influence of the overlying extremely thick primary key stratum on the strong mine pressure hazard at the large mining face in Gaojiapu coal mine.
Shan Ning +7 more
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International Journal of Mining Science and Technology, 2023 In the process of using the original key stratum theory to predict the height of a water-flowing fractured zone (WFZ), the influence of rock strata outside the calculation range on the rock strata within the calculation range as well as the fact that the
Jianghui He +5 more
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The field monitoring experiment of the high-level key stratum movement in coal mining based on collaborative DOFS and MPBX. [PDF]
Sci Rep, 2022 Abstract The deformation and movement characteristics of high-level key stratums in overlying strata are important for estimating ground subsidence and understanding failure characteristics of ultrathick strata during mining. In this study, a distributed optical fiber sensor (DOFS) and multipoint borehole extensometers (MPBXs) were ...
Wang X, Xie J, Zhu W, Xu J.
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Influence of the Primary Key Stratum on Surface Subsidence during Longwall Mining
Sustainability, 2022 The surface subsidence caused by mining influences the mine environment and construction safety. In this paper, strata movement and surface subsidence were combined. Based on elasticity and Winkler theory, a prediction method of surface subsidence was established with the primary key stratum as the research object.
Kang Wang, Jiazhen Li, Zhupeng Jin
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Parameters and surrounding rock control of gob-side driving under double key stratum after roof cutting. [PDF]
Sci RepAbstractTaking the return-airway 4204 with roof cutting in Longquan Coal Mine as the engineering background, roof structure, key parameters, and deviatoric stress evolution were studied. Conclusion: The Key Stratum within a 4–8 times mining height is considered as Near Key Stratum.
Xu L +7 more
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Strong Ground Pressure Mechanism and Control at the Longwall Top Coal Caving with a Single Key Stratum in Goaf [PDF]
Shock and Vibration, 2020 A strong ground pressure in the multiseam environment manifested by rib spalling and roadway deformation at the fully mechanized working face was assessed by a comprehensive combination of field measurements, physical simulations, and theoretical ...
Ke Yang +4 more
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Energy Geoscience, 2023 No breakthrough has been made in petroleum exploration of the Sinian Dengying Formation in the southeastern Sichuan Basin as the major factors controlling the hydrocarbon accumulation of the Dengying Formation have not been well established, including ...
Shuangjian Li +5 more
doaj +1 more source
Influencing Factors’ Analysis of Disturbance Degree of Key Stratum Based on the Response Surface Method [PDF]
Advances in Civil Engineering, 2021 The key stratum controls the activities of the overlying strata or the whole strata up to the surface, which is one of the important research objects in the coal seam mining. Based on the analysis of several geological factors affecting on the key stratum, the definition of “disturbance degree of key stratum” (KSDD) was proposed.
Yang Li +6 more
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Classified characteristics of helium gas resources and controlling factors for the enrichment
Shiyou shiyan dizhi, 2023 The lack of helium resources accounts for the limited helium supply in China. It is of great significance to classify of helium-enriched natural gas according to the characteristics of helium reservoirs and the main controlling factors of helium ...
Xinjun CHEN +3 more
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Echolocation and Stratum Preference: Key Trait Correlates of Vulnerability of Insectivorous Bats to Tropical Forest Fragmentation [PDF]
Frontiers in Ecology and Evolution, 2019 (Uploaded by Plazi for the Bat Literature Project) Habitat loss and fragmentation rank high amongst the most pressing threats to biodiversity. Understanding how variation in functional traits is associated with species vulnerability in fragmented landscapes is central to the design of effective conservation strategies.
Silvia Fraixedas Núñez +14 more
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