摘要
本文建立了顶板的屈服状态结构模型,利用板的刚塑性极限载荷上限解推导出弹塑性上限解,消除了因忽略弹塑性变形而造成断裂步距偏大的影响,得到比较符合实际的四边实体煤采场顶板断裂步距计算式,并用实测资料确定了其修正参量的取值范围。
This paper has set up the structure model of the roof at yielding state. Using the upper-limit solution of the limiting load of rigid-plastic plate, it deduced the upper-limit solution of elastic-plastic plate and eliminated the influence of the relatively bigger fractacture length due to the neglecting of the elastic-plastic deformation. It has shown that the formula of fracture length of the roof is fairly coincident with actual situation ingoaf aronnd which is solid coal. It also determined the range of the revised parameter value using the observation data
出处
《山东矿业学院学报》
CAS
1989年第3期21-26,共6页
Journal of Shandong University of Science and Technology(Natural Science)
关键词
采场
顶板压力
断裂步距
板极限
roof pressure
fracture
elastic deformation
plastic deformation
limit
