Abstract:
A solid-filling coal mining feeding and conveying monitoring system, suitable for monitoring of a vertical feeding and conveying system in underground mine solid-filling mining. The monitoring system mainly consists of an industrial control computer, a PLC control box, an operating platform, a liquid crystal display, a color four-picture divider, two video optical receivers and loudspeakers, four cameras, uphole electronic belt scales, downhole electronic belt scales, a radar level meter, a coal level sensor, a vibration sensor, and various matching junction boxes and cables, the components being installed in positions such as a material field, a control room, upper and lower openings of a storage silo, and a gangue transportation lane. The system implements four main functions of a solid-filling material transportation and feeding process, the four main functions being status monitoring, a full silo alarm, centralized control, and recording and querying. The monitoring content of the system is comprehensive; operation of the system is simple; and the system is safe and reliable.
Abstract:
A solid-filling coal mining feeding and conveying monitoring system, suitable for monitoring of a vertical feeding and conveying system in underground mine solid-filling mining. The monitoring system mainly consists of an industrial control computer, a PLC control box, an operating platform, a liquid crystal display, a color four-picture divider, two video optical receivers and loudspeakers, four cameras, uphole electronic belt scales, downhole electronic belt scales, a radar level meter, a coal level sensor, a vibration sensor, and various matching junction boxes and cables, the components being installed in positions such as a material field, a control room, upper and lower openings of a storage silo, and a gangue transportation lane. The system implements four main functions of a solid-filling material transportation and feeding process, the four main functions being status monitoring, a full silo alarm, centralized control, and recording and querying. The monitoring content of the system is comprehensive; operation of the system is simple; and the system is safe and reliable.
Abstract:
Disclosed is a method for designing supporting parameters of a transition support for a mixed mining face of filling and fully-mechanized mining. The method includes: first, determining a total length of a mixed mining working face and a length of a filling section according to requirements of a coal mining production capacity of the mixed mining working face and a filling capacity of the filling section working face; then, establishing a mixed mining numerical model of filling and fully-mechanized mining by using three-dimensional distinct element software, and simulating and calculating a caving height of a roof of a transition section and a stress influence range of the transition section when a filling rate of a mined-out area of the filling section changes; based on a result of numerical simulation and calculation, performing curve fitting according to a correlation coefficient to obtain a functional relationship between the filling rate and the caving height and a functional relationship between the filling rate and the stress influence range of the transition section; and finally designing supporting parameters of a transition support in combination with actual engineering geological parameters. The method can provide a reference for supporting design of a support, and enables a smooth transition between a filling support and a fully-mechanized mining support for a mixed working face, thereby further enriching filling mining theories and expanding the application range of filling mining.