Coal mining-induced surface subsidence poses significant ecological and infrastructural challenges, necessitating a comprehensive study to ensure safe mining practices, particularly in underwater conditions. This proj...Coal mining-induced surface subsidence poses significant ecological and infrastructural challenges, necessitating a comprehensive study to ensure safe mining practices, particularly in underwater conditions. This project aims to address the extensive impact of coal mining on the environment, infrastructure, and overall safety, focusing on the Shigong River area above the working face. The study employs qualitative and quantitative analyses, along with on-site engineering measurements, to gather data on crucial parameters such as coal seam characteristics, roof rock lithology, thickness, water resistance, and structural damage degree. The research encompasses a multidisciplinary approach, involving mining, geology, hydrogeology, geophysical exploration, rock mechanics, mine surveying, and computational mathematics. The importance of effective safety measures and prevention techniques is emphasized, laying the foundation for research focused on the Xingyun coal mine. The brief concludes by highlighting the potential economic and social benefits of this project and its contribution to valuable experience for future subsea coal mining.展开更多
Children and adults are often exposed to lead in homes as a result of deteriorating lead-based paint surfaces and any disturbance to those surfaces. There are a number of laws, regulations, standards and guidance docu...Children and adults are often exposed to lead in homes as a result of deteriorating lead-based paint surfaces and any disturbance to those surfaces. There are a number of laws, regulations, standards and guidance documents in place aimed at minimization of lead dust contamination following renovation and repair activities. These laws and regulations are oftentimes confusing and conflicting for the maintenance contractor who has limited time and resources for researching the right and appropriate course of action. This paper provides a comprehensive review and discussion of the lead laws, regulations, standards and guidelines for contractors.展开更多
文摘Coal mining-induced surface subsidence poses significant ecological and infrastructural challenges, necessitating a comprehensive study to ensure safe mining practices, particularly in underwater conditions. This project aims to address the extensive impact of coal mining on the environment, infrastructure, and overall safety, focusing on the Shigong River area above the working face. The study employs qualitative and quantitative analyses, along with on-site engineering measurements, to gather data on crucial parameters such as coal seam characteristics, roof rock lithology, thickness, water resistance, and structural damage degree. The research encompasses a multidisciplinary approach, involving mining, geology, hydrogeology, geophysical exploration, rock mechanics, mine surveying, and computational mathematics. The importance of effective safety measures and prevention techniques is emphasized, laying the foundation for research focused on the Xingyun coal mine. The brief concludes by highlighting the potential economic and social benefits of this project and its contribution to valuable experience for future subsea coal mining.
文摘Children and adults are often exposed to lead in homes as a result of deteriorating lead-based paint surfaces and any disturbance to those surfaces. There are a number of laws, regulations, standards and guidance documents in place aimed at minimization of lead dust contamination following renovation and repair activities. These laws and regulations are oftentimes confusing and conflicting for the maintenance contractor who has limited time and resources for researching the right and appropriate course of action. This paper provides a comprehensive review and discussion of the lead laws, regulations, standards and guidelines for contractors.
