Comprehensive analysis of safe mining to heavy and steep coal seam under complex geophysics environment

• Published in: Journal of coal science & engineering, China Vol. 14; no. 3; pp. 378 - 381
• Main Author: 王宁波 李立波 来兴平 柴鑫
• Format: Journal Article
• Language: English
• Published: Heidelberg China Coal Society 01.09.2008
• Subjects: Earth and Environmental Science; Earth Sciences; EDZ; Geochemistry; Geology; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; Mechanical Engineering; 复杂地质环境; 崩落开采法; 重深煤井; excavation disturbance zone(EDZ); high-section-top-coal-caving(HSTCC); dynamic destabilization; complex geophysics environment; heavy-steep coal seam
• ISSN: 1006-9097; 1866-6566
• DOI: 10.1007/s12404-008-0083-4

In virtue of effect of N-S intensive ground stress and mining disturbance to ＋579E2EB1＋2 mining site at Weihuliang Mine, the dip angle and section height is 65° and 52 m, respectively, the collapses happed frequently during mining. Firstly, mining conditions, spatial structure and parameters were investigated. Then physical simulation and dynamic numerical tracing and elaborate simulation relating roof and top-coal were applied based on 2D-Block Program and quantitative regularity of stress at variable depths had been estimated. Furthermore, it was manifested that effective measures, i.e., fast mining, control symmetrical top-coal-caving at dip and strike directions, optimizing ventilation system, active-stereo preventing gas were performed successfully in mining practice. Ultimately, the derived dynamic hazard were prevented so as to safety mining.