Principles for choosing coal mining methods 1． Production safety 2. Economically reasonable 3. High coal recovery rate
The main factors affecting the selection of coal mining methods 1. Geological factors (1) the inclination of the coal seam; (2) the thickness of the coal seam (3) the characteristics of the coal seam and surrounding rock; (4) the geological structure in the coal seam; (5) the water inflow of the coal seam , Gas emission and natural ignition of coal. 2. The influence of technological development and equipment level 3. Management level factors
Development direction of coal mining method (1) Continuously improve coal mining technology and develop mechanization; (2) Improve roadway layout, optimize mining area system and parameters;
(3) Mining of gently sloping and inclined thick coal seams: full-thickness mining at one time for fully mechanized mining with large cutting height; caving coal mining method for thick coal seams; caving mining method with inclined slicing downwards (4) mechanized mining of thin coal seams; (5) Roadway protection technology without coal pillar; (6) Mining technology for steep coal seams; (7) Filling mining method in the problem of "three under" coal mining; (8) Column system coal mining method characterized by continuous shearer; (9) The coal mining technology is the core of the coal mining method, and the improvement of the coal mining technology mainly depends on the improvement of the mining equipment (especially the support and mining equipment). (10) Analyze the various parameters of the coal mining method and its Optimize the combination, develop the selection of coal mining method and optimize the design method, and improve the research and improvement of coal mining method to a new level.
