Subsidence analysis and prediction with measured data have been conducted and applied to local strata and mining conditions worldwide. Underground coal mines chose the most suitable analysis and prediction method for ...Subsidence analysis and prediction with measured data have been conducted and applied to local strata and mining conditions worldwide. Underground coal mines chose the most suitable analysis and prediction method for them. However, there was no study based on the measured data of subsidence induced by underground mining operation in Indonesia. This paper describes the condition of underground coal mine in Indonesia and then discusses the subsidence behavior due to longwall mining operation based on measured data in Balikpapan coal-bearing formation in Indonesia.展开更多
With the increasing demand for oil, the state and related enterprises attach more and more importance to the oil exploitation. As we all know, the most important link in oil production is downhole operation. In downho...With the increasing demand for oil, the state and related enterprises attach more and more importance to the oil exploitation. As we all know, the most important link in oil production is downhole operation. In downhole operation, the oil test is the most important part. In recent years, with the development of science and technology in China and the increase of oil demand, higher requirements are put forward for the oil test technology in China's oil exploitation technology. With the continuous exploitation of oil, the complex geological characteristics of oil fields and other factors, it is urgent to further improve the oil test technology in oil recovery technology. In this paper, based on the actual construction situation of oil test work in China at the present stage, combined with the current existing oil test technology, the oil test technology of China's future petroleum technology is analyzed.展开更多
Ensuring the safe evacuation of miners during fire emergencies in the shortest possible time is one of the most critical aspects of underground mining operations.Despite advances in mining evacuation methods,little re...Ensuring the safe evacuation of miners during fire emergencies in the shortest possible time is one of the most critical aspects of underground mining operations.Despite advances in mining evacuation methods,little research has been conducted on mine vehicles in this context.This study proposed a vehicle-augmented evacuation integer programming(VEIP)model to minimize the total evacuation cost as a function of the required evacuation time during fire emergencies.This approach aims to minimize the risk of miners being exposed to dangerous fire conditions by strategically integrating mine vehicles into the evacuation procedure.The approach determines the optimal evacuation path for each miner,considering factors such as available mine vehicles,miners’locations,refuge chambers,and fresh-air bases.To validate the effectiveness of the developed VEIP model,a case study was conducted using the mine layout of the Turquoise Ridge Underground Mine in the United States.Furthermore,a statistical comparison was conducted between the VEIP model and the evacuation integer programming(EIP)model,tailored to evacuation on foot,to emphasize vehicles’influence on the evacuation process.The results showed that integrating mine vehicles into evacuation procedures significantly reduces the total evacuation time.A cost savings analysis in the VEIP model revealed that the evacuation time savings increase exponentially as the number of miners present during evacuation increases.The potential benefits of using mine vehicles to improve the efficiency of evacuation from underground mine fires were highlighted in this study.展开更多
文摘Subsidence analysis and prediction with measured data have been conducted and applied to local strata and mining conditions worldwide. Underground coal mines chose the most suitable analysis and prediction method for them. However, there was no study based on the measured data of subsidence induced by underground mining operation in Indonesia. This paper describes the condition of underground coal mine in Indonesia and then discusses the subsidence behavior due to longwall mining operation based on measured data in Balikpapan coal-bearing formation in Indonesia.
文摘With the increasing demand for oil, the state and related enterprises attach more and more importance to the oil exploitation. As we all know, the most important link in oil production is downhole operation. In downhole operation, the oil test is the most important part. In recent years, with the development of science and technology in China and the increase of oil demand, higher requirements are put forward for the oil test technology in China's oil exploitation technology. With the continuous exploitation of oil, the complex geological characteristics of oil fields and other factors, it is urgent to further improve the oil test technology in oil recovery technology. In this paper, based on the actual construction situation of oil test work in China at the present stage, combined with the current existing oil test technology, the oil test technology of China's future petroleum technology is analyzed.
基金funded by the National Institute for Occupational Health and Safety under grant U60OH012351an Artificially Intelligent Mining Systems(AIMS)Capacity Building Project under contract number 75D30119C06044 for safer and healthier automated operations.
文摘Ensuring the safe evacuation of miners during fire emergencies in the shortest possible time is one of the most critical aspects of underground mining operations.Despite advances in mining evacuation methods,little research has been conducted on mine vehicles in this context.This study proposed a vehicle-augmented evacuation integer programming(VEIP)model to minimize the total evacuation cost as a function of the required evacuation time during fire emergencies.This approach aims to minimize the risk of miners being exposed to dangerous fire conditions by strategically integrating mine vehicles into the evacuation procedure.The approach determines the optimal evacuation path for each miner,considering factors such as available mine vehicles,miners’locations,refuge chambers,and fresh-air bases.To validate the effectiveness of the developed VEIP model,a case study was conducted using the mine layout of the Turquoise Ridge Underground Mine in the United States.Furthermore,a statistical comparison was conducted between the VEIP model and the evacuation integer programming(EIP)model,tailored to evacuation on foot,to emphasize vehicles’influence on the evacuation process.The results showed that integrating mine vehicles into evacuation procedures significantly reduces the total evacuation time.A cost savings analysis in the VEIP model revealed that the evacuation time savings increase exponentially as the number of miners present during evacuation increases.The potential benefits of using mine vehicles to improve the efficiency of evacuation from underground mine fires were highlighted in this study.
