顶煤放出散体介质流理论的现场观测研究 |
| |
引用本文: | 王家臣,杨建立,刘颢颢,赵大鹏,郑立永. 顶煤放出散体介质流理论的现场观测研究[J]. 煤炭学报, 2010, 0(3): 353-356 |
| |
作者姓名: | 王家臣 杨建立 刘颢颢 赵大鹏 郑立永 |
| |
作者单位: | 中国矿业大学(北京) |
| |
基金项目: | 国家自然科学基金资助项目(50974123);;国家自然科学基金重点资助项目(50834005);;煤炭资源与安全开采国家重点实验室自主研究课题资助项目 |
| |
摘 要: | 研制了观测顶煤移动和放出规律的专用顶煤运移跟踪仪,用于观测现场顶煤放出率。在室内进行了顶煤放出规律的模拟试验,通过在顶煤不同层位放标志点的方法,详细研究了不同层位顶煤放出率和颗粒移动轨迹,得出靠近支架的下位顶煤受移架步距等影响采出率偏低,靠近顶板的上位顶煤由于窜矸影响,采出率明显低于其他部分。结合标志点在放出过程中的坐标变化,运用回归分析,得出了不同层位顶煤颗粒运移轨迹的曲线方程,表明顶煤颗粒在放出过程中分3个阶段:先沿二次曲线轨迹向后下方移动,然后垂直下降,最后顶煤颗粒会以二次或三次曲线的轨迹向前下方流出放煤口。
|
关 键 词: | 顶煤移动规律 介质流理论 顶煤跟踪仪 采出率 颗粒轨迹 放顶煤 |
收稿时间: | 2009-10-12 |
The practical observation research on loose medium flow field theory on the top-coal caving |
| |
Abstract: | The special top-coal tracking system used for surveying the top-coal movement and running in the coal face was developed.The simulation experiment on the rule of top-coal running was done in laboratory.The recovery ratio and movement trace of the top-coal in the different layers were researched in detail by means of marking grains in the top-coal.The experiment result shows that the recovery ratio of the lower layer top-coal which is closed to the support is smaller due to drawing support,and the ratio of h... |
| |
Keywords: | rule of top-coal movement medium flow field theory top-coal movement trace recovery ratio grain trace top-coal caving |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《煤炭学报》浏览原始摘要信息 |
|
点击此处可从《煤炭学报》下载免费的PDF全文 |
|