Second, the choice of the location of the roadway at the bottom of the well should meet the following requirements: 1 should be selected in stable hard rock formations, and should avoid large faults, tectonic stress areas, strong aquifers. 2 Do not place in coal seams with coal and gas outburst danger and impact ground pressure. 3 When the coal seam roof is stable and the coal seam is hard, it can also be placed in the coal seam. 3. When coal transportation is carried out by fixed-type mining locomotives, the length of the main well empty and heavy-duty lines should be 1.5 to 2.0 times the length of the train. When the auxiliary transportation is transported by fixed mine train, the length of the auxiliary shaft empty and heavy line should be 1.0 to 1.5 times the length of the train. Fourth, the use of 600mm gauge 1t or 1.5t mine car inclined shaft yard, its flat curve radius can be 12 ~ 15m; vertical curve radius can be 12 ~ 20m; lifting traction angle should not be greater than 20 °; empty, heavy vehicles The height difference of the line should not be greater than 1.0m. The length of the empty and heavy lanes is determined according to the mode of transportation of the lanes, but should not be less than 2 to 3 times the length of the truck. With the wellbore lifted by other vehicles, the radius of the horizontal and vertical curves of the brake yard should be determined according to the parameters of the selected vehicle. 5. The shunting operation at the bottom of the well should be mechanically operated, supplemented by the necessary automatic sliding. The operation of the mine car into the cage or into the dumper should be mechanically operated. 6. The ability to pass through the bottom of the well site. When using locomotive transportation, it should be calculated according to the operation schedule chart, and its passing capacity should be 30% larger than the mine design production capacity. When the operation schedule chart is compiled, the running speed and additional time of the locomotive shunting operation can be selected according to the following values: when the locomotive is located in front of and behind the train and the transport distance is less than 50m, the train speed is 1.0m/s and the transport distance is 50~150m. The train speed is 1.5m/s. High Whiteness Offset Paper,High Whiteness Book Paper,High Whiteness Woodfree Paper,High Whiteness Woodfree Offset Paper Puyang Longfeng Paper Co.,Ltd. , https://www.lonfonpaper.com
Coal mining technology - bottom hole yard
1. The layout of the bottom hole yard should be comprehensively analyzed and determined according to the geological conditions, the transportation mode of the main road, the transportation volume, the relative position of the wellbore and the transportation lane, and the layout of the ground production system.