Given the conditions of residual coal from the boundary of a flat dipping open-pit mine,which uses strip areas mining and inner dumping with slope-covering,we propose an open-pit and underground integrated mining tech...Given the conditions of residual coal from the boundary of a flat dipping open-pit mine,which uses strip areas mining and inner dumping with slope-covering,we propose an open-pit and underground integrated mining technology for residual coal of end slopes.In the proposal a conveyance road and ventilation conveyance near the slope are built,corresponding to the pit mining area and the surface coal mine dump,as well as an interval haulage tunnel and air-inlet tunnel.The outcome shows that such mining method may reduce the effect to slope stability from underground mining,it does not affect the dumping advance and has a high recovery rate of residual coal resources.The working face is timbered by single hydraulic props,transported by a scraper conveyor and supported by coal walls.This method of mining is one of layered top coal caving,with high resource recovery,low production cost where positive economic benefit can be realized.展开更多
Under circumstances in which both underground mining and open-pit mining are employed, the mining effects of two approaches will be superposed and the mining slope will receive several induced stress fields, which mak...Under circumstances in which both underground mining and open-pit mining are employed, the mining effects of two approaches will be superposed and the mining slope will receive several induced stress fields, which makes the sliding mechanism and deformation law of slope rock mass more complicated. This paper, targeting at the east slope of Antaibao Mine with the joint employment of underground mining and open-pit mining, aims to study the moving law of the slope rock mass and the damage mechanism to the overburden of the goaf by numerical simulation. It is supposed that models of possible damage to the slope could be explored for guidance to safety-production of the mine.展开更多
Mineral resources,often referred to as“industrial food,”play a pivotal role in the national economic construction sector.Specifically,strategic minerals(SMs)bear a direct influence on the development of emerging str...Mineral resources,often referred to as“industrial food,”play a pivotal role in the national economic construction sector.Specifically,strategic minerals(SMs)bear a direct influence on the development of emerging strategic industries within China.This paper aims to shed light on the supply and demand dynamics,current status,and characteristics of SMs from the perspective of China's national security.We offer a comprehensive review of the current status and challenges associated with SM mining technology in China.Our analysis spans various mining methods,including open-pit mining,deep underground mining,green mining of complex underground bodies,integrated underground mining and processing,and intelligent mining.Within this framework,we delve into multiple initiatives aimed at improving the status of the mining industry,increasing production,and maintaining the adequate supply of these resources.We discuss these strategies from both a top-level policy and system design perspective,as well as detailed implementation plans.展开更多
文摘Given the conditions of residual coal from the boundary of a flat dipping open-pit mine,which uses strip areas mining and inner dumping with slope-covering,we propose an open-pit and underground integrated mining technology for residual coal of end slopes.In the proposal a conveyance road and ventilation conveyance near the slope are built,corresponding to the pit mining area and the surface coal mine dump,as well as an interval haulage tunnel and air-inlet tunnel.The outcome shows that such mining method may reduce the effect to slope stability from underground mining,it does not affect the dumping advance and has a high recovery rate of residual coal resources.The working face is timbered by single hydraulic props,transported by a scraper conveyor and supported by coal walls.This method of mining is one of layered top coal caving,with high resource recovery,low production cost where positive economic benefit can be realized.
文摘Under circumstances in which both underground mining and open-pit mining are employed, the mining effects of two approaches will be superposed and the mining slope will receive several induced stress fields, which makes the sliding mechanism and deformation law of slope rock mass more complicated. This paper, targeting at the east slope of Antaibao Mine with the joint employment of underground mining and open-pit mining, aims to study the moving law of the slope rock mass and the damage mechanism to the overburden of the goaf by numerical simulation. It is supposed that models of possible damage to the slope could be explored for guidance to safety-production of the mine.
基金supported by the National Natural Science Foundation of China (Nos.52274151,552104156,and 52074351)the Science and Technology Innovation Program of Hunan Province (No.2021RC3125)the 14th Five Years Key Programs for Science and Technology Development of China (No.2021YFC2900400).
文摘Mineral resources,often referred to as“industrial food,”play a pivotal role in the national economic construction sector.Specifically,strategic minerals(SMs)bear a direct influence on the development of emerging strategic industries within China.This paper aims to shed light on the supply and demand dynamics,current status,and characteristics of SMs from the perspective of China's national security.We offer a comprehensive review of the current status and challenges associated with SM mining technology in China.Our analysis spans various mining methods,including open-pit mining,deep underground mining,green mining of complex underground bodies,integrated underground mining and processing,and intelligent mining.Within this framework,we delve into multiple initiatives aimed at improving the status of the mining industry,increasing production,and maintaining the adequate supply of these resources.We discuss these strategies from both a top-level policy and system design perspective,as well as detailed implementation plans.
