Results 71 to 80 of about 1,016,619 (289)
Frontiers in Earth ScienceRockburst prevention poses a major challenge in coal mining, with thick and hard roof strata being the primary cause of rockbursts. To analyze the feasibility and effectiveness of using hydraulic fracturing as an alternative to blasting methods for ...
Kunlun Liu +8 more
doaj +1 more source
olcernaim/roof-type-classification: Roof type classification Release 1
, 2022 Roof Type Classification with Innovative Machine Learning ...
olcernaim
core +1 more source
Early evolution of the gular musculature and its innervation in ray‐finned fishes
The Anatomical Record, EarlyView.Abstract Gular muscles are an important but often overlooked component of cranial anatomy in bony fishes. They are located on the ventral surface of the head and are derived from the mandibular and hyoid arches. We present a comprehensive review of the gular musculature and its innervation across early diverging actinopterygian lineages. By integrating
Aléssio Datovo +4 more
wiley +1 more source
Research of cumulative energy blasting technology with deep and shallow hole combined in hard roof
矿业科学学报, 2020 To solve the problems of low crack rate and large overhanging roof after directional presplitting cumulative blasting technology is implemented under the condition of hard roof, through theoretical analysis, numerical simulation and field monitoring, the
Li Minzu +3 more
doaj +1 more source
The Control Mechanism of the Coal Pillar Width on the Mechanical State of Hard Roofs
MathematicsThis study addresses the critical challenge of optimizing coal pillar width in burst-prone mines with thick, hard roof strata, balancing resource recovery, roadway stability, and coal burst mitigation. Through integrated analytical modeling and rigorously calibrated numerical simulations, the research reveals the complex interplay between pillar width,
Qifeng Jia +5 more
openaire +3 more sources
Innervation of the tubarial glands: A hypothesis‐driven anatomical review
The Anatomical Record, EarlyView.Abstract The tubarial glands have been described as a macroscopic bilateral glandular complex in the posterolateral nasopharynx near the torus tubarius and the pharyngeal opening of the Eustachian tube. Since their recognition on prostate‐specific membrane antigen‐based imaging, their anatomical classification has remained debated, with converging ...
Mugurel Constantin Rusu +2 more
wiley +1 more source
Applied SciencesThe safety and efficiency of underground coal mining are threatened by thick hard roofs characterized by large overhang areas, problematic spontaneous caving, and high dynamic load upon their breakage.
Wei Zhang +5 more
doaj +1 more source
Exceptional preservation informs the paleobiology of tapinocephalid dinocephalians
The Anatomical Record, EarlyView.Abstract The tapinocephalid dinocephalian Moschops is one of the most iconic taxa of the middle Permian, yet its paleobiology remains one of the least well‐known. Here, we address some aspects of paleoneurology and paleobiology of Moschops using CT scanning of four well preserved skulls from the upper Abrahamskraal Formation of South Africa. Two of the
Julien Benoit +6 more
wiley +1 more source
Meitan xuebaoLarge mining height technology is characterized by high yield, high efficiency, and high recovery rate. It has become the preferred technology for mining thick coal seams in Yushen mining area.
Jiachen WANG +6 more
doaj +1 more source
Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesAbstractDeep mining stress increase and thick hard rock layer endowment drive rock body fissure expansion, leading to sudden fracture of the roof plate accidents. The roof slab of 11,129 working face in Zhangji Mine is a 16 m thick sandstone composite roof slab, whose compressive strength reaches 89.8 MPa.
Jiaxin Dang +3 more
openaire +2 more sources