超长任务面可行性论证(国外英文资料).docVIP

超长工作面可行性论证(国外英文资料) The feasibility of a long working face The significance of the feasibility study of 1.1 working face Comprehensive mechanized coal mining working face length, average of 150 ~ 220 m, such as mining working face length for licensing the technology conditions of up to 250 ~ 300 m, each working face length consistent as much as possible. The length of ordinary mechanized coal mining is usually 120 ~ 160m, and the total length of the working face is 200 ~ 300m. The length of the working face is 80 ~ 150m. When tectonic influences such as fault are affected, the length is determined according to the actual situation. The working face of the slanted coal seam using the pseudo-slanted flexible shield is usually 30 ~ 60m. Overlong working face refers to the working face of more than 300m working face, with the following advantages: (1) in the process of recovery, it is possible to find the suitable working face length to ensure the safety factor of the coal mining. Extending the distance of working face in a certain scope can realize the high productivity and efficiency of the work surface, and reduce the purpose of consumption. (2) the length of the working face is the most effective. It is the study of coal mining technology. In suitable conditions, increase the length of working face, can not only improve the yield, convenient roadway layout, simplify the production system, is advantageous to the mine production is highly concentrated, and can improve the mine resource recovery rate, and is conducive to the surface buildings (such as railway, highway, etc.). (3) in perfect working face equipment and improve the level of mining equipment, on the basis of extended length of working face, raise the yield of full-mechanized caving mining face, to promote the development of the mine production is highly concentrated, accelerate the construction of high production and efficiency mine, this is the direction of further development of full-mechanized caving mi