针对堆石坝填筑进度控制以及土石方动态调运问题,受AlphaGo-Zero的启发,本文提出了一个基于蒙特卡洛树搜索(Monte Carlo tree search,MCTS)的土石方智能动态调配模型。该模型以当前累计填筑工程量、紧邻前一月份完成工程量以及当前月份...针对堆石坝填筑进度控制以及土石方动态调运问题,受AlphaGo-Zero的启发,本文提出了一个基于蒙特卡洛树搜索(Monte Carlo tree search,MCTS)的土石方智能动态调配模型。该模型以当前累计填筑工程量、紧邻前一月份完成工程量以及当前月份为状态,用各月填筑工作面对应的填筑可达强度约束动作空间,综合考虑节点工期、总工期、坝面施工机械费用和土石方调运费用等因素构造奖励函数。此外,结合本文研究问题的特点,对MCTS迭代中的上限置信区间算法(upper confidence bound apply to tree,UCT)进行了改进和比较分析,最后以一个工程实例对本文提出模型的有效性进行了验证分析。结果表明,与施工仿真相比,以MCTS为框架的土石方动态调配模型的计算分析时间大大减少,为土石方动态调配问题提供了新的模型与手段。展开更多
In order to recover the strip pillar coal resources, reduce the amount of gangue mountain and realize remediation of the goaf environment in the old mining area, the raw gangue filling mining technology was proposed. ...In order to recover the strip pillar coal resources, reduce the amount of gangue mountain and realize remediation of the goaf environment in the old mining area, the raw gangue filling mining technology was proposed. According to the previous practical experience, the feasibility of the implementation of raw gangue filling mining technology in the coal-pressed area was analyzed. Through the filling gangue compaction test, the deformation under different loading stages was obtained. Further, a reasonable prediction of the deformation beyond the experimental limited loading load was made based on the experimental results. Through the deformation source analysis of the whole process of gangue filling, the key factors for controlling deformation before, during, and after filling were determined. Additionally, the proportion of deformation during different stages was quantified. Considering the protection of surface buildings, mining fullness of the working face and mining technology, the production parameters of 1209 and 1210 filling working faces were preliminarily determined. Through numerical simulation, the rationality of mining scheme was verified. Based on the practice of 1209 working face and the key factors to control the deformation of gangue filling, the mining system and process in 1210 working face were optimized. According to the measured surface rock movement, raw gangue filling mining technology can meet the requirements of surface building protection level. Especially, this paper provides a method to quantitatively calculate the equivalent mining height (EMH) of raw gangue filling and its mining deformation, which has reference significance for old mining areas.展开更多
文摘针对堆石坝填筑进度控制以及土石方动态调运问题,受AlphaGo-Zero的启发,本文提出了一个基于蒙特卡洛树搜索(Monte Carlo tree search,MCTS)的土石方智能动态调配模型。该模型以当前累计填筑工程量、紧邻前一月份完成工程量以及当前月份为状态,用各月填筑工作面对应的填筑可达强度约束动作空间,综合考虑节点工期、总工期、坝面施工机械费用和土石方调运费用等因素构造奖励函数。此外,结合本文研究问题的特点,对MCTS迭代中的上限置信区间算法(upper confidence bound apply to tree,UCT)进行了改进和比较分析,最后以一个工程实例对本文提出模型的有效性进行了验证分析。结果表明,与施工仿真相比,以MCTS为框架的土石方动态调配模型的计算分析时间大大减少,为土石方动态调配问题提供了新的模型与手段。
文摘In order to recover the strip pillar coal resources, reduce the amount of gangue mountain and realize remediation of the goaf environment in the old mining area, the raw gangue filling mining technology was proposed. According to the previous practical experience, the feasibility of the implementation of raw gangue filling mining technology in the coal-pressed area was analyzed. Through the filling gangue compaction test, the deformation under different loading stages was obtained. Further, a reasonable prediction of the deformation beyond the experimental limited loading load was made based on the experimental results. Through the deformation source analysis of the whole process of gangue filling, the key factors for controlling deformation before, during, and after filling were determined. Additionally, the proportion of deformation during different stages was quantified. Considering the protection of surface buildings, mining fullness of the working face and mining technology, the production parameters of 1209 and 1210 filling working faces were preliminarily determined. Through numerical simulation, the rationality of mining scheme was verified. Based on the practice of 1209 working face and the key factors to control the deformation of gangue filling, the mining system and process in 1210 working face were optimized. According to the measured surface rock movement, raw gangue filling mining technology can meet the requirements of surface building protection level. Especially, this paper provides a method to quantitatively calculate the equivalent mining height (EMH) of raw gangue filling and its mining deformation, which has reference significance for old mining areas.
