Model test of the overburden deformation and failure law in close distance multi-seam mining

• Published in: Journal of coal science & engineering, China Vol. 14; no. 2; pp. 181 - 185
• Main Author: 杨伟峰 隋旺华 夏筱红
• Format: Journal Article
• Language: English
• Published: Heidelberg China Coal Society 01.06.2008
• Subjects: Earth and Environmental Science; Earth Sciences; Geochemistry; Geology; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; Mechanical Engineering; 多裂缝采矿; 工程地质机械模式; 矿山安全; 覆盖层; overburden failure; safety mining; multi-seam mining; engineering geological mechanical model
• ISSN: 1006-9097; 1866-6566
• DOI: 10.1007/s12404-008-0037-x

Based on characteristic of the associated mining of multi-coal seam and the engineering geological characteristics of overburden, the mining impact pattern of multi-seam mining and the dynamic fracture mechanism of overburden were characterized by applying the engineering geological mechanical model test. The related strata movement parameters and influence area of multi-seam mining were obtained, the strike boundary angle is 61°, the full extraction coefficient is 0.93, the greatest subsidence angle is 81°, the horizontal movement factor is 0.38, the deviation of inflection point/mining deep is 0.11. The development height of caving zone and water flowing fractured zone of multi-seam mining were calculated, is 32 m and 81.5 m separatly. The assess of influence degree of coal layer safety mining is that, there exists the possibility of water and sand inflow when mining, some messures for mine water prevention and control should be used, and the mining thickness should be local strictly limit.