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- periodic roof pressure 周期顶板压力
- The paper analysed the maximum damage depth of the working face floor. Based on the result, the relationship between roof pressure and water-irruption from floor are discussed. 从矿山压力角度分析采煤工作面底板破坏带最大深度产生的时间和位置,进而探讨顶板来压和底板突水之间的关系,最后给出工作面来压和非来压期间,底板究水的可能性。
- The TRT system was decomposed into blast furnace gas reaction container, roof pressure container, gas pipeline and gas flowrate regulating valve after its mechanism analysis. 在分析TRT系统工作机理基础上,将其分解为高炉煤气反应容器、炉顶压力容器、煤气管道、煤气流量调节阀4部分。
- Keywords roof pressure;coal floor;water-irruption; 顶板来压;支承压力;承压开采;底板突水;
- Study of the main roof pressure and gas outburst rules 采场老顶来压活动瓦斯涌出规律的研究
- Effect of igneous rock on the roof pressure of mining field 火成岩对采场顶板压力分布的影响
- Keywords roof pressure;accoustic emission;forecasting; 顶板压力;声发射;预报;
- That period was a bright page in the history of Chinese literature. 那个时期是中国文学史上光辉的一页。
- Let us hope that the period of this injustice will be over soon. 让我们希望这个不公正的时期很快结束吧。
- Childhood is a period of rapid growth. 幼年是生长迅速的时期。
- New method to determine the main roof pressure in tridimensional simulated test 立体相似模拟实验判断老顶来压的新方法
- He consulted the chronicles of the period. 他参考了这一时期的编年史。
- Test and research on roof pressure bearing and support zone in mining district 采场支承压力带范围的实验研究
- He had to decide within a given period. 他得在一定时间内作出决定。
- She has a detailed knowledge of this period. 她对这段时期的情况了解地相当详细。
- In that period auto sales hit a14-year low. 这时期汽车销售量达到14年来最低水平。
- In this period, unemployment reaches record levels. 这段时间的失业人数又达到了创纪录水平。
- Which period of history are you studying? 你正在学哪一段历史?
- Keywords first roof weighting pace;periodic roof weighting pace;updip mining;downdip mining; 初次来压步距;周期来压步距;仰斜开采;俯斜开采;
- Can you tell me the time period when it was stolen? 能不能告诉我大概什么时候被偷的?