The authors analyzed the characteristic of surrounding rock temperature field around a drifting face, set up its mathematic model, and got its numerical result with the boundary element method(BEM). To calculate in tr...The authors analyzed the characteristic of surrounding rock temperature field around a drifting face, set up its mathematic model, and got its numerical result with the boundary element method(BEM). To calculate in tra domain integral, it was transformed into boundary integration with the DRM method. Using the similitude theory, the dimensionless differential equation was educed. Finally, the authors calculated two drifting faces of Sanhejian Coal Mine using the computer software developed by authors based on the above principium, and got the distribution characteristic of surrounding rock temperature field around a drifting face and the periodic variation in temperature with its periodic moving forward. Comparing the calculated heat dissipating capacity of surrounding rock with the measured data shows that the computer software is proper.展开更多
Aiming at the problem of the existing sorting for microstructure of fly ash, an improved scheme was put forward in this paper. First, fly ash particles are divided into four groups as low calcium, iron, high calcium a...Aiming at the problem of the existing sorting for microstructure of fly ash, an improved scheme was put forward in this paper. First, fly ash particles are divided into four groups as low calcium, iron, high calcium and char particle according to the substance components of fly ash. Then fly ash particles are divided into 14 sub groups, for example: cenospheres, plerospheres, solid spheres, porous char and dense char based on their chemical composition, shape and the characteristics of inner structure of fly ash. It has a distinct difference in granule configuration, inner structure and substance components. Some disadvantages of the existing scheme such as unilateralism and imprecision have been overcome in the advanced schemes.展开更多
The data tree table is a type of data structure consisting of data tree and table, which has a wide field of applications. The visual and dynamic growing algorithm of data tree table and its software method are presen...The data tree table is a type of data structure consisting of data tree and table, which has a wide field of applications. The visual and dynamic growing algorithm of data tree table and its software method are presented based on the theory of the data structure and visual technology of software. The method of the expression and management of data tree table with relational mode are explored.展开更多
Based on the neural network technique, this paper proposes a BP neural network model which integrates geological factors which affect top coal caving in a comprehensive index. The index of top coal caving may be used ...Based on the neural network technique, this paper proposes a BP neural network model which integrates geological factors which affect top coal caving in a comprehensive index. The index of top coal caving may be used to forecast the mining cost of working faces, which shows the model’s potential prospect of applications.展开更多
文摘The authors analyzed the characteristic of surrounding rock temperature field around a drifting face, set up its mathematic model, and got its numerical result with the boundary element method(BEM). To calculate in tra domain integral, it was transformed into boundary integration with the DRM method. Using the similitude theory, the dimensionless differential equation was educed. Finally, the authors calculated two drifting faces of Sanhejian Coal Mine using the computer software developed by authors based on the above principium, and got the distribution characteristic of surrounding rock temperature field around a drifting face and the periodic variation in temperature with its periodic moving forward. Comparing the calculated heat dissipating capacity of surrounding rock with the measured data shows that the computer software is proper.
文摘Aiming at the problem of the existing sorting for microstructure of fly ash, an improved scheme was put forward in this paper. First, fly ash particles are divided into four groups as low calcium, iron, high calcium and char particle according to the substance components of fly ash. Then fly ash particles are divided into 14 sub groups, for example: cenospheres, plerospheres, solid spheres, porous char and dense char based on their chemical composition, shape and the characteristics of inner structure of fly ash. It has a distinct difference in granule configuration, inner structure and substance components. Some disadvantages of the existing scheme such as unilateralism and imprecision have been overcome in the advanced schemes.
文摘The data tree table is a type of data structure consisting of data tree and table, which has a wide field of applications. The visual and dynamic growing algorithm of data tree table and its software method are presented based on the theory of the data structure and visual technology of software. The method of the expression and management of data tree table with relational mode are explored.
文摘Based on the neural network technique, this paper proposes a BP neural network model which integrates geological factors which affect top coal caving in a comprehensive index. The index of top coal caving may be used to forecast the mining cost of working faces, which shows the model’s potential prospect of applications.
