昨天上午8时50分，南岗刘村的曲女士在家门口和七名村民一起纳凉时，突然感觉身上落了许多白色晶状体的颗粒，她伸手一摸，颗粒很快就融化了。
Yesterday, 8:50, Nangang Liu village, qu Ms. Liu at home and enjoy the cool air with seven villagers, suddenly they felt a lot of white particles lens. When she touched, the particles quickly melt.
超前支护锚杆锚固后与顶板岩石构成一体，这样使超前锚杆形成组合梁作用，放炮后，能够阻止顶板岩石冒落。
Forward support bolt combined with roop rock by bolting can play a roll of combined beam, which can prevent roof rock caving immediately after explosion.
根据硅粉纯化的要求，提供了一种长落程和高反应速率的冷等离体反应器。
According to the purity requirement for Si powder, a cold plasma reaction chamber with long drop distance and high reaction rate is provided in the paper.
数值分析结果表明：夹沟矿采空区的顶板是不稳定的，顶板岩体容易发生垮落事故。
The results of numerical analysis on mined-out area indicate that the roof at mined-out areas is unstable and the rock in the roof is easy to collapse in this mine.
研究表明设计的爆破参数能合理爆落设计范围内的岩体，且对顶板围岩不致造成过大的损害。
The results show that the designed parameters are reasonable and there is a little damage for roof rock mass.
在某些情况下，将落鱼的外部彻底磨铣，使落鱼体和剩余的碎片能被推至井筒底部。
In some cases, the outer portion of a fish may be milled out to allow the body and remaining debris to be pushed to the bottom of the wellbore.
工程应用表明，锚杆支护巷道沿空留巷，有效切落了采空区侧顶板，减小了巷旁支护体载荷；
The project application cases showed that the gob-side entry retaining with bolt support could effectively cut the side roof of the gob-sides and reduce the loading of the support devices.
岩体的局部冒落长期困扰着地下矿山的安全生产，对其进行预防、预报势在必行。
The mine safe production is disturbed by local collapse of rock mass. All the time, therefore, the prevention and forecast for local collapse of rock mass are imperative.
通过对顺槽煤柱破坏失稳机理及煤柱上覆岩体的结构特征、垮落失稳机理的分析，提出了合理煤柱宽度的计算公式。
Through analyze the failure mechanism and structural feature of mine pillar and upside rock, the reasonable virgin coal width formula has been obtained.
通过对顺槽煤柱破坏失稳机理及煤柱上覆岩体的结构特征、垮落失稳机理的分析，提出了合理煤柱宽度的计算公式。
Through analyze the failure mechanism and structural feature of mine pillar and upside rock, the reasonable virgin coal width formula has been obtained.
应用推荐