工作面底板破坏范围是多煤层开采技术中关注的一个重要问题.直接影响到上部煤层开采对下部煤层顶板的影响。根据弹塑性理论,建立了底板塑性破坏的滑移线场计算模型,分析了底板破坏范围内主动极限区、过渡区和被动极限区的理论求解方法。
Damage scope of backplane the face plate in a multi-seam mining is the key technology in mining , directly impacting on the upper part the lower roof when the mining is executing in the upper coal seam . According to elastic-plastic theory, the plastic calculation model of the slip line field for the damage of bottom, a theory analysis method of the scope of the destruction zone, transition zone and passive theoretical limit zone of active backplane limit was carried out.