Determination of the Caving Zone and Fracture Zone Heights by Using the LK-Means Algorithm
Advances in Civil Engineering, 2023 The caving zone and fracture zone frequently appear after coal excavation. However, the caving zone and fracture zone can hardly be obtained with an empirical equation. Therefore, identifying a proper method to determine the caving zone and fracture zone
Ze Zhou +4 more
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Evolution Characteristics of Void in the Caving Zone Using Fiber Optic Sensing. [PDF]
Sensors (Basel)Addressing the issue of low filling efficiency in gangue slurry backfilling due to unclear evolution characteristics of voids in the overlying collapsed rock mass during mining, this study utilizes fiber optic sensing technology to monitor real-time strain changes within the rock mass.
Chai J, Qiu F, Zhu L, Zhang D.
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Numerical simulation and field test of height of caving zone and fracture zone in Heshan Coal Mine
Meikuang Anquan, 2023 In order to explore the distribution rules of caving zone and water conducted zone of lower layer coal under the influence of mining on upper layer coal, based on theoretical analysis, distribution rules of floor fracture zone of upper coal layer and ...
Gang HAO +4 more
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Study on crack propagation law of overlying strata in the process of small coal pillar mining in inclined extra-thick coal seam [PDF]
Scientific ReportsAiming at the problem of unclear crack propagation law of overburden rock in the process of small coal pillar mining in inclined extra-thick coal seam, this paper takes the 11,002 working face of Tengda Coal Mine in Heze, Xinjiang as the background ...
Weidong Lu +5 more
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Deformation characteristics of weakly cemented overburden in Western mining areas in China [PDF]
Scientific ReportsUnderstanding the deformation behavior of weakly cemented overburden in western coalfields is critical for assessing mining-induced instability and groundwater hazards. Taking the 23 − 2 coal seam of Yili No.
Guanyu Zhang +5 more
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Evolution of the roof caving and fracture zones during mining of close range coal seams [PDF]
Scientific ReportsThis study employs an integrated methodology combining slip line field theory, FLAC3D numerical simulation, and hydraulic injection testing to systematically investigate the evolutionary characteristics of roof two zones under repeated mining conditions ...
Jianhua Li +4 more
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It’s All about the Zone: Spider Assemblages in Different Ecological Zones of Levantine Caves [PDF]
Diversity, 2021 Caves possess a continuum of ecological zones that differ in their microhabitat conditions, resulting in a gradient of nutrients, climate, and illumination. These conditions engender relatively rapid speciation and diverse assemblages of highly specialised spider fauna.
Jordan P. Cuff +5 more
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Stability Monitoring and Deformation Laws of the Yuanjue Cave in the Influence Zone of the Unloading Zone [PDF]
Geofluids, 2021 As a representative of cliff-like stone cultural relics, caves are carved on natural mountains and cliffs, which overlap with the influence zone of the geological unloading zone. Cracks in the unloading zone lead to stability issues, including falling blocks, collapse, water seepage, and deformation.
Zhigang Meng +4 more
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Applied Sciences, 2022 To study the caving of thick hard overburdens and evolution of water-conducting fracture zones in fully mechanized top-coal caving faces of gently inclined extra-thick coal seams, we comprehensively analyzed the 8103 working face of the Beixinyao Coal ...
Yang Zhou, Xueyi Yu
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Evidence of ancestral nocturnality, locomotor clock regression, and cave zone-adjusted sleep duration modes in a cave beetle [PDF]
Subterranean Biology, 2023 The small carrion beetle Ptomaphagus hirtus is an abundant inhabitant of the exceptionally biodiverse Mammoth Cave system. Previous studies revealed negative phototaxis and the expression of biological clock genes in this microphthalmic cave beetle. Here we present results from probing P.
Sonya Royzenblat +2 more
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