Monitoring the stability of steep slopes of open-pit mines is a major issue relating to production safety in mines.In order to determine the technical parameters of a new type of supervising system applied in monitori...Monitoring the stability of steep slopes of open-pit mines is a major issue relating to production safety in mines.In order to determine the technical parameters of a new type of supervising system applied in monitoring steep slopes of open-pit mines,the MSARMA method was used to establish analytical models for the monitoring system,given various parameter settings based on the description of mechanical monitoring principles.We used this sensitivity analysis to conclude that the setting of the most sensitive location of a mechanical monitoring system should be within a range of 1/5～1/2 of the lower part in a vertical direction of steep slopes,with a rational and feasible range of the dip angle setting between 0°～20°.Given the analytical results of our on-site experiments,we have shown that the parameters determined reflect the stability of steep slopes accurately and effectively.These conclusions provide a basis for the application of a new type of steep slope stability monitoring technology in open-pit mines.展开更多
The electrical potential inside a cylinder with a space charge layer is used to express the neck potential barrier of nano-SnO2 gas elements, and the neck-controlled sensitivity and the grain size effect are studied. ...The electrical potential inside a cylinder with a space charge layer is used to express the neck potential barrier of nano-SnO2 gas elements, and the neck-controlled sensitivity and the grain size effect are studied. It is shown that the sensing properties are influenced by the microstructural features, such as the grain size, the geometry and connectivity between grains, and that the neck controlled sensitivity alone is higher than the neck-grain controlled sensitivity and the difference between the neck controlled sensitivity and the neck-grain controlled sensitivity is large in the high sensitivity range for nano-SnO2 gas elements, which suggests a possible approach to the improvement of the sensitivity of a sensor by decreasing the number of necks of a nano-grain SnO2 gas element.展开更多
基金Project 1053G032 supported by the Youth Science Foundation of Educational Committee of Heilongjiang Province
文摘Monitoring the stability of steep slopes of open-pit mines is a major issue relating to production safety in mines.In order to determine the technical parameters of a new type of supervising system applied in monitoring steep slopes of open-pit mines,the MSARMA method was used to establish analytical models for the monitoring system,given various parameter settings based on the description of mechanical monitoring principles.We used this sensitivity analysis to conclude that the setting of the most sensitive location of a mechanical monitoring system should be within a range of 1/5～1/2 of the lower part in a vertical direction of steep slopes,with a rational and feasible range of the dip angle setting between 0°～20°.Given the analytical results of our on-site experiments,we have shown that the parameters determined reflect the stability of steep slopes accurately and effectively.These conclusions provide a basis for the application of a new type of steep slope stability monitoring technology in open-pit mines.
基金Chongqing Education Committee Foundation (No.020804)
文摘The electrical potential inside a cylinder with a space charge layer is used to express the neck potential barrier of nano-SnO2 gas elements, and the neck-controlled sensitivity and the grain size effect are studied. It is shown that the sensing properties are influenced by the microstructural features, such as the grain size, the geometry and connectivity between grains, and that the neck controlled sensitivity alone is higher than the neck-grain controlled sensitivity and the difference between the neck controlled sensitivity and the neck-grain controlled sensitivity is large in the high sensitivity range for nano-SnO2 gas elements, which suggests a possible approach to the improvement of the sensitivity of a sensor by decreasing the number of necks of a nano-grain SnO2 gas element.
