2results about How to "Improve coal mining efficiency" patented technology

The application provides a fitting method and device for a coal face floor of a coal mining machine and an electronic device. The method comprises the following steps: obtaining a fluctuation curve of a coal seam floor of a coal mine; after the coal mining machine cuts a coal, obtaining a minimum radius of a stope floor, wherein the stope floor is a floor of a model corresponding to a lowermost coal seam in a space formed after the coal mining machine mines coal, and the minimum radius is a radius of a circular arc formed by up and down fluctuations of a drum of the coal mining machine; generating a circle according to the minimum radius of the stope floor, fitting the circle along the fluctuation curve of the coal seam floor until a curve generated by the circle coincides with the fluctuation curve. In the method, the circle obtained by the minimum radius of the stope floor is fitted in the fluctuation curve of the coal seam floor, so that the curve generated by the circle can be fitted with the fluctuation curve of the coal seam floor as much as possible, and the fitted stope floor can adapt to the change of the coal seam, thereby improving the efficiency of coal mining.

The utility model discloses a kind of mine scraper conveyor chain break monitoring devices, the monitoring device includes proximity switch, current transformer and controller;The signal output end of the proximity switch is connected with the output end of current transformer and the signal input end of controller;The proximity switch is installed in the chain scraper both sides of head, for monitoring scraper conveyor chain;The current transformer monitors the input current of the motor of scraper conveyor.The monitoring device of the utility model makes judgment after the occurrence of chain break condition, and controller makes judgment through the signal monitored by proximity switch and current transformer, controls head, tail motor to stop quickly, effectively avoids overload operation after scraper conveyor failure, stops in time to ensure equipment safety to avoid larger range failure, improve coal mining efficiency, reduce enterprise production cost.