Since 1990s,the spatial data warehouse technology has rapidly been developing, but due to the complexity of multi-dimensional analysis, extensive application of the spatial data warehouse technology is affected. In th...Since 1990s,the spatial data warehouse technology has rapidly been developing, but due to the complexity of multi-dimensional analysis, extensive application of the spatial data warehouse technology is affected. In the light of the characteristics of the flood control and disaster mitigation in the Yangtze river basin, it is proposed to design a scheme about the subjects and data distribution of the spatial data warehouse of the flood control and disaster mitigation in Yangtze river basin, i.e., to adopt a distributed scheme. The creation and development of the spatial data warehouse of the flood control and disaster mitigation in Yangtze river basin is presented .The necessity and urgency of establishing the spatial data warehouse is expounded from the viewpoint of the present situation being short of available information for the flood control and disaster mitigation in Yangtze river basin.展开更多
井工开采过程中,覆岩运动、应力演化及能量释放是影响安全生产的重要矿压与动力现象,但其隐蔽性、复杂性、间接性等特点给防灾减灾专业的教研教学带来了一定难度与挑战。传统教学方式受限于条件假设和不可视性,制约了学生对灾害机理的...井工开采过程中,覆岩运动、应力演化及能量释放是影响安全生产的重要矿压与动力现象,但其隐蔽性、复杂性、间接性等特点给防灾减灾专业的教研教学带来了一定难度与挑战。传统教学方式受限于条件假设和不可视性,制约了学生对灾害机理的深度理解与应用能力。基于此,该文将FLAC3D(fastlagrangian analysis of continua in 3D)数值模拟技术引入防灾减灾教学体系,阐述FLAC3D在教学中的实用价值,通过两个案例实验演示解释其在教学过程中的可视化、易接受的矿压响应特征、灾害诱因、优化防控措施,并评估教学质量的应用成效,给出优化建议。实践表明FLAC3D数值模拟技术可有效提升学生对矿山岩石力学与矿压响应特征的理解能力,培养其灾害预警与防范思维,以及工程决策能力。未来,随着具备强大数据处理和分析能力的AI技术的快速发展,可进一步与FLAC3D数值模拟基础软件深度联合,解析煤矿开采过程中复杂的数据信息,构建基于数据驱动的煤矿安全+教学与战略人才培养新模式。展开更多
为研究双柱式桥墩结构在含大块石泥石流冲击作用下的动力响应特征,基于光滑粒子动力学-有限元(smoothed particle hydrodynamics-finite element method,SPH-FEM)耦合方法,建立泥石流浆体-大块石-双柱式桥墩动态相互作用模型,分别从泥...为研究双柱式桥墩结构在含大块石泥石流冲击作用下的动力响应特征,基于光滑粒子动力学-有限元(smoothed particle hydrodynamics-finite element method,SPH-FEM)耦合方法,建立泥石流浆体-大块石-双柱式桥墩动态相互作用模型,分别从泥石流冲击特征、桥墩结构应变和冲击力时程等方面,分析泥石流冲击下双柱式桥墩的动力学行为,探讨了不同特性泥石流对桥墩承灾破坏特征的影响.结果表明:所提出的数值分析方法可以较好地模拟泥石流冲击、沿桥墩绕流及流出的整个分布过程;泥浆冲击桥墩底部会出现明显的绕流现象,上游的桥墩柱体所受冲击力远大于下游;受块石冲击的桥墩底部承受较大的横向冲击力,导致出现较大应变,甚至混凝土脱落;桥墩所受冲击力与泥石流的冲击速度和大块石直径都呈正相关;夹杂着大块石的泥石流对桥墩的冲击力远大于仅有浆体的冲击力,是造成桥墩破坏的主要因素.研究成果有助于理解泥石流多发区双柱桥墩的冲击灾变机制,并为其抗冲击设计提供科学依据.展开更多
文摘Since 1990s,the spatial data warehouse technology has rapidly been developing, but due to the complexity of multi-dimensional analysis, extensive application of the spatial data warehouse technology is affected. In the light of the characteristics of the flood control and disaster mitigation in the Yangtze river basin, it is proposed to design a scheme about the subjects and data distribution of the spatial data warehouse of the flood control and disaster mitigation in Yangtze river basin, i.e., to adopt a distributed scheme. The creation and development of the spatial data warehouse of the flood control and disaster mitigation in Yangtze river basin is presented .The necessity and urgency of establishing the spatial data warehouse is expounded from the viewpoint of the present situation being short of available information for the flood control and disaster mitigation in Yangtze river basin.
文摘井工开采过程中,覆岩运动、应力演化及能量释放是影响安全生产的重要矿压与动力现象,但其隐蔽性、复杂性、间接性等特点给防灾减灾专业的教研教学带来了一定难度与挑战。传统教学方式受限于条件假设和不可视性,制约了学生对灾害机理的深度理解与应用能力。基于此,该文将FLAC3D(fastlagrangian analysis of continua in 3D)数值模拟技术引入防灾减灾教学体系,阐述FLAC3D在教学中的实用价值,通过两个案例实验演示解释其在教学过程中的可视化、易接受的矿压响应特征、灾害诱因、优化防控措施,并评估教学质量的应用成效,给出优化建议。实践表明FLAC3D数值模拟技术可有效提升学生对矿山岩石力学与矿压响应特征的理解能力,培养其灾害预警与防范思维,以及工程决策能力。未来,随着具备强大数据处理和分析能力的AI技术的快速发展,可进一步与FLAC3D数值模拟基础软件深度联合,解析煤矿开采过程中复杂的数据信息,构建基于数据驱动的煤矿安全+教学与战略人才培养新模式。
文摘为研究双柱式桥墩结构在含大块石泥石流冲击作用下的动力响应特征,基于光滑粒子动力学-有限元(smoothed particle hydrodynamics-finite element method,SPH-FEM)耦合方法,建立泥石流浆体-大块石-双柱式桥墩动态相互作用模型,分别从泥石流冲击特征、桥墩结构应变和冲击力时程等方面,分析泥石流冲击下双柱式桥墩的动力学行为,探讨了不同特性泥石流对桥墩承灾破坏特征的影响.结果表明:所提出的数值分析方法可以较好地模拟泥石流冲击、沿桥墩绕流及流出的整个分布过程;泥浆冲击桥墩底部会出现明显的绕流现象,上游的桥墩柱体所受冲击力远大于下游;受块石冲击的桥墩底部承受较大的横向冲击力,导致出现较大应变,甚至混凝土脱落;桥墩所受冲击力与泥石流的冲击速度和大块石直径都呈正相关;夹杂着大块石的泥石流对桥墩的冲击力远大于仅有浆体的冲击力,是造成桥墩破坏的主要因素.研究成果有助于理解泥石流多发区双柱桥墩的冲击灾变机制,并为其抗冲击设计提供科学依据.
