多元学习支架是促进学生有效学习的重要保障。基于支架理论的最新研究发展,本文以北师大版高中教材必修二第六单元第一课A Medical Pioneer的教学为例,深度探析了如何在高中英语阅读教学中合理且适时搭建环境支架、语言支架、感官支架...多元学习支架是促进学生有效学习的重要保障。基于支架理论的最新研究发展,本文以北师大版高中教材必修二第六单元第一课A Medical Pioneer的教学为例,深度探析了如何在高中英语阅读教学中合理且适时搭建环境支架、语言支架、感官支架、互动支架等硬支架以及即时动态生成的软支架,以提升阅读教学质量,促进学生核心素养的落地。展开更多
In Gengcun Colliery, Yima Coal Group Co. Ltd.the characteristics of the gateways of thick coal seam and the coal seam is with fully mechanized sublevel caving mining are that the thickness of roof coal seam of gateway...In Gengcun Colliery, Yima Coal Group Co. Ltd.the characteristics of the gateways of thick coal seam and the coal seam is with fully mechanized sublevel caving mining are that the thickness of roof coal seam of gateways is larger, their surrounding rocks are the whole-coal mass and the coal seam is prone to Spontaneous Combustion. With the natural equilibrium arch theory, the reasonable adjacent distance of No.11 mine-type metal supports was calculated in trapezoidal gateways based on these characteristics. Then, in-situ supporting experiments were carried out. The results indicate that under the action of virgin rock stress, the width of broken rocks zone of surrounding rocks is 1.7–2.0 m in return heading and 1.1–1.3 m in going headway. And their surrounding rocks belong to the Ⅳ-type soften rock and the Ⅲ-type common surrounding rock respectively. Therefore, under the movable abutment pressure, the gateways deformation is serious. It is suggested that the designed gateways have to use pre-broadened cross section to suit their deformation. At the same time, the accumulated water on gateway floor must be drained in time. These measures were taken in the 1302 and 1304 coal faces in Gengcun Colliery, and the satisfactory results have been obtained.展开更多
文摘多元学习支架是促进学生有效学习的重要保障。基于支架理论的最新研究发展,本文以北师大版高中教材必修二第六单元第一课A Medical Pioneer的教学为例,深度探析了如何在高中英语阅读教学中合理且适时搭建环境支架、语言支架、感官支架、互动支架等硬支架以及即时动态生成的软支架,以提升阅读教学质量,促进学生核心素养的落地。
基金Project 0511051900 supported by Natural Science Foundation of Henan Province
文摘In Gengcun Colliery, Yima Coal Group Co. Ltd.the characteristics of the gateways of thick coal seam and the coal seam is with fully mechanized sublevel caving mining are that the thickness of roof coal seam of gateways is larger, their surrounding rocks are the whole-coal mass and the coal seam is prone to Spontaneous Combustion. With the natural equilibrium arch theory, the reasonable adjacent distance of No.11 mine-type metal supports was calculated in trapezoidal gateways based on these characteristics. Then, in-situ supporting experiments were carried out. The results indicate that under the action of virgin rock stress, the width of broken rocks zone of surrounding rocks is 1.7–2.0 m in return heading and 1.1–1.3 m in going headway. And their surrounding rocks belong to the Ⅳ-type soften rock and the Ⅲ-type common surrounding rock respectively. Therefore, under the movable abutment pressure, the gateways deformation is serious. It is suggested that the designed gateways have to use pre-broadened cross section to suit their deformation. At the same time, the accumulated water on gateway floor must be drained in time. These measures were taken in the 1302 and 1304 coal faces in Gengcun Colliery, and the satisfactory results have been obtained.
