Technological optimization of fully mechanized caving mining face with large mining heights

• Published in: Journal of coal science & engineering, China Vol. 19; no. 3; pp. 290 - 294
• Main Authors: Fan, Lu-Jia, Yang, Sheng-Li
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.06.2013
• Subjects: Earth and Environmental Science; Earth Sciences; Geochemistry; Geology; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; Mechanical Engineering; 优化; 厚煤层开采; 大采高综采工作面; 巷道掘进; 开采厚度; 技术; 采矿方法; 顶煤回收率; large mining height; caving process optimization; fully mechanized caving face; numerical calculation by PFC; top-coal tracking system
• ISSN: 1006-9097; 1866-6566
• DOI: 10.1007/s12404-013-0304-3

Fully mechanized cave mining with large mining height is a new mining method, due to its large mining thickness and lower roadway excavation, the technology has been widely used in China＇s thick seam mining. In order to improve the top-coal recovery ratio of fully mechanized cave mining with large mining height, a study was conducted on optimizing the caving process, based on the mechanized caving face 1302N in Longgu Coal Mine. This was achieved by improving the PFC numerical calculation methods, and establishing a more accurate model system. On this basis, the recovery ratio of the top coal in different drawing intervals and technologies was investigated in order to achieve a reasonable caving process. The top-coal tracking system was used for practical surveying of the recovery ratio of top coal.