| 采场坚硬顶板断裂步距的板极限分析 |
| |
| 引用本文： | 谭云亮,蒋金泉.采场坚硬顶板断裂步距的板极限分析[J].山东科技大学学报(自然科学版),1989(3). |
| |
| 作者姓名： | 谭云亮 蒋金泉 |
| |
| 作者单位： | 山东矿业学院矿压研究所，山东矿业学院矿压研究所 |
| |
| 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。
|
| 关 键 词： | 顶板压力 断裂 弹性变形 塑性变形 极限 |
THE PLATE LIMIT ANALYSIS OF THE FRACTURE LENGTH OF HARD ROOF BACK OF THE COALFACE |
| |
| Tan Yunliang,Jiang Jinquan.THE PLATE LIMIT ANALYSIS OF THE FRACTURE LENGTH OF HARD ROOF BACK OF THE COALFACE[J].Journal of Shandong Univ of Sci and Technol: Nat Sci,1989(3). |
| |
| Authors: | Tan Yunliang Jiang Jinquan |
| |
| Institution: | Res. Inst. of Mjn. Pressure |
| |
| Abstract: | 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 |
| |
| Keywords: | roof pressure fracture elastic deformation plastic deformation limit |
| 本文献已被 CNKI 等数据库收录！ |
