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- A mass of snow and rock break away and fall on the climber. 一堆积雪和岩石突然崩落到登山者的身上。
- Coal and rock oil, or petroleum, are of great value as fuels. 煤和石油或汽油，作为燃料，价值极大。
- A mass of snow and rock broke away and fell on the climbers. 一堆积雪和岩石突然崩落到登山者的身上。
- coal and rock break 煤岩破裂
- According to the index of bump proneness of coal and rock,weak bump proneness existed in . 煤岩冲击倾向性是煤岩的固有属性,是决定其产生冲击破坏的能力和发生冲击地压的必要条件。
- EME of coal and rock is a kind of phenomenon during the deformation and fractur... 顶板稳定性异常区域电磁辐射脉冲数明显增多,可以应用电磁辐射技术非接触监测评价矿山顶板的稳定性。
- The damage speed of coal and rock is EME impulse, the release energy in an instant (EME amplitude value) and the deformation speed. 煤岩体的损伤速度与电磁辐射脉冲数成正比，与瞬间释放的能量（幅值）、变形速度成正比；
- A dispatching decision method that integrates the allocating goods-current of coal and rock with computer simulation is supplied. 提出了用“煤岩货流量分配”与计算机模拟相结合的一种调度决策方法。
- The prerequisite of rock burst occurrence is that the elastic energy in coal and rock mass around coal mine roadway and stope has accumulated enough. 冲击地压发生的前提是矿山井巷和采场周围的煤岩体中储存了足够的弹性能。
- Automatic lifting of shearer drum is one of key techniques of coal face automation, and its core is identification technique of coal and rock interface. 滚筒自动调高是实现采煤工作面自动化的关键技术之一,其核心是煤岩分界识别技术。
- An important characteristic of instability failure of coal and rock which is subjected to external loadings is that its deformation possesses property of strain softening. 煤岩体在外载荷作用下发生失稳破坏时的一个重要性质就是其变形具有应变软化的特征。
- In accordance with the experiment and application results, the paper has also made a discussion on the EME principle of deformation and fracture of coal and rock. 本文阐述了电磁辐射法预测突出的理论和实验基础,电磁辐射法预测突出能实现连续、非接触、准确可靠和自动化监测,是煤与瓦斯突出预测技术的发展方向。
- Coal and oil are natural products. 煤和石油是天然物产。
- Loads on a cutting head are random processes which are determined by variability of anti cut strenth for coal and rock, uneven of grooving thickness and wearing exent of picks. 截割头的载荷是由煤岩抗截强度的多变性、切屑厚度的不均匀性以及截齿磨损程度的变化等诸多因素决定的随机过程.
- Coal and rock are a rheid medium.A great of expriment and research showed that when coal and rock are loaded, they will have electric magnetic radiation. 摘要煤岩是一种流变介质，大量的实验研究表明煤岩受载能够产生电磁辐射。
- The method and approach to search for faulted seam with coal and rock seam in practice are dissertated,andgood techni and economic effects has been obtained. 通过实例说明生产过程中,用煤岩层对比法寻找断失煤层的方法、步骤,取得了良好的技术经济效果。
- By similarity simulation experiment, we analysis the mining-induced fracture distribution and permeability of coal and rock mass near protective layer mined by speckle method. 阐述了含瓦斯煤的力学特性：通过相似模拟实验，用散斑法对保护层开采过程中来动裂隙分布规律及煤岩体的渗透性进行了分析。
- Because of tectonic movement, there is large igneous intrusion in the working area and changed physical properties of coal and rock in different extent. 因地质构造运动,采区内有大面积岩浆岩侵入,不同程度地改变了煤岩物理性质。
- A piece of rock broke off and fell into the sea . 一块岩石断开，掉进了海里。
