摘要
急倾斜煤层由于开采边界不规则，及其它地质和技术因素，顶板破断具有明显的随机性。在相互挤压的破断板块系统中，２～３个关键板块对工作面矿压显现有决定影响。在“回转下沉反转上升”运动中，上升区如处于控顶区上方，使支架卸载造成顶板灾害。对关键板块运动的监测反馈，是进行有效岩层控制的重要环节。较软弱底板的破坏滑移，是造成顶板随机运动复杂化的又一原因。
The roof fracture of steep seam manifests obvious random characteristic owing to irregularity of mining boundary and different stowing feature of breakage waste along faceline as well as geological and technical factors in pitch mining of longwall face. The 2～3 key plates have important influence on the ground behaviour of face in system of reciprocal extrusion fracture plates.In movement of “rotating subsidencereverse uplift',if the uplift zone is situated over the roofcontrol district, the supports will unload and lead to roof accidents. The monitoring and feedback for key plates is a key link of strata controlling effectively. The damage and slump of softish floor is another reason of making random movement of roof complicated.
出处
《西安矿业学院学报》
1998年第1期1-7,共7页
Journal of Xi'an University of Science & Technology
基金
国家自然科学基金
