To determine the filling body's width along the gob-side remained roadway which is underneath the gob,the authors analyzed the interaction mechanism between the roof and the supporting body along the remained road...To determine the filling body's width along the gob-side remained roadway which is underneath the gob,the authors analyzed the interaction mechanism between the roof and the supporting body along the remained roadway, based on the elastic thin plate theory of the stope roof. The stress state and mechanical response of the filling body along the remained roadway were studied. Specifically, firstly, the supporting pressure of the coal pillar which is on one side of the gob-side remained roadway was deduced.Also, an equation that is used to calculate the width of the balance area in the stress limit state was acquired. Then, an equation that is used to calculate the roof cutting force on one side of the supporting body was obtained. By using FLAC3D, the authors investigated the displacement field and stress field response laws of rock masses around the roadway with different filling body's widths. The results show that with the filling body's width increasing, the supporting ability of the filling body increases.Meanwhile, the rock mass displacement around the roadway and the filling body deformation decrease.The better the filling body's supporting effect is, the higher the roof cutting force will be. When the filling body's width is larger than 3.0 m, its internal bearing ability becomes stable and the filling body's deformation became non-apparent. Finally, analysis shows that the filling body's width should be 2.5 m.Furthermore, the authors conducted field tests in the supply roadway 1204, using high-water materials and acquired expected outcomes.展开更多
Firstly, physical and chemical properties of dust removed from BOF gas are analyzed, and then the cold banding technology of dust removed from BOF gas and its application are introduced. Tests have proved that using c...Firstly, physical and chemical properties of dust removed from BOF gas are analyzed, and then the cold banding technology of dust removed from BOF gas and its application are introduced. Tests have proved that using cooled agglomerated pellets made of the dust removed from BOF gas and small amounts of modified starch as a coolant and slagging agent in steel production can bring about considerable economic, social and environmental benefits.展开更多
Optic neuritis （ON）,an acute inflammatory optic neuropathy,causes conduction blocks in the optic nerve and a series of visual functional changes.It is characterized not only by the inflammation of the optic nerve bu...Optic neuritis （ON）,an acute inflammatory optic neuropathy,causes conduction blocks in the optic nerve and a series of visual functional changes.It is characterized not only by the inflammation of the optic nerve but also the visual dysfunction caused by the neuropathy involving optic chiasm,lateral geniculate body,optic radiation,and visual cortex.Clinical diagnosis mainly relies on the visual function evaluation using electrophysiology,vision examination,and magnetic resonance imaging （MRI）.However,pattern-visual evoked potential （P-VEP） and visual field examination have limitation.Blood-oxygenation level dependent functional magnetic resonance imaging （BOLD-fMRI）,an integrative modality of the function,images and anatomy,can be used to monitor the status of brain activity in the functional areas in vivo.The present study aimed to examine the status of functional activities of the visual cortex in the patients with optic neuritis using of BOLD-fMRI technique and to evaluate the application of fMRI in the optic neuritis.Keywords：optic neuritis; functional magnetic resonance imaging,; visual field; pattern-visual evoked potential展开更多
基金Supported by National Natural Science Foundation of China(81500377,81370248)Chenzhou Science and Technology Bureau(CZ-XNXY-201510)+1 种基金Research Funds for Young Scientists of the Department of Education of Hunan Province(16B245)Hunan Provincial University Innovation Platform Open Fund Project(16K082)~~
基金supported by the Sub-Project of National Key Basic Research and Development Program (No. 2015CB251600)funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)+1 种基金the Fundamental Research Funds for the Central Universities (No. 2014XT01)the National Natural Science Foundation of China (No. 51574227)
文摘To determine the filling body's width along the gob-side remained roadway which is underneath the gob,the authors analyzed the interaction mechanism between the roof and the supporting body along the remained roadway, based on the elastic thin plate theory of the stope roof. The stress state and mechanical response of the filling body along the remained roadway were studied. Specifically, firstly, the supporting pressure of the coal pillar which is on one side of the gob-side remained roadway was deduced.Also, an equation that is used to calculate the width of the balance area in the stress limit state was acquired. Then, an equation that is used to calculate the roof cutting force on one side of the supporting body was obtained. By using FLAC3D, the authors investigated the displacement field and stress field response laws of rock masses around the roadway with different filling body's widths. The results show that with the filling body's width increasing, the supporting ability of the filling body increases.Meanwhile, the rock mass displacement around the roadway and the filling body deformation decrease.The better the filling body's supporting effect is, the higher the roof cutting force will be. When the filling body's width is larger than 3.0 m, its internal bearing ability becomes stable and the filling body's deformation became non-apparent. Finally, analysis shows that the filling body's width should be 2.5 m.Furthermore, the authors conducted field tests in the supply roadway 1204, using high-water materials and acquired expected outcomes.
文摘Firstly, physical and chemical properties of dust removed from BOF gas are analyzed, and then the cold banding technology of dust removed from BOF gas and its application are introduced. Tests have proved that using cooled agglomerated pellets made of the dust removed from BOF gas and small amounts of modified starch as a coolant and slagging agent in steel production can bring about considerable economic, social and environmental benefits.
文摘Optic neuritis （ON）,an acute inflammatory optic neuropathy,causes conduction blocks in the optic nerve and a series of visual functional changes.It is characterized not only by the inflammation of the optic nerve but also the visual dysfunction caused by the neuropathy involving optic chiasm,lateral geniculate body,optic radiation,and visual cortex.Clinical diagnosis mainly relies on the visual function evaluation using electrophysiology,vision examination,and magnetic resonance imaging （MRI）.However,pattern-visual evoked potential （P-VEP） and visual field examination have limitation.Blood-oxygenation level dependent functional magnetic resonance imaging （BOLD-fMRI）,an integrative modality of the function,images and anatomy,can be used to monitor the status of brain activity in the functional areas in vivo.The present study aimed to examine the status of functional activities of the visual cortex in the patients with optic neuritis using of BOLD-fMRI technique and to evaluate the application of fMRI in the optic neuritis.Keywords：optic neuritis; functional magnetic resonance imaging,; visual field; pattern-visual evoked potential
