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- rib spalling of coal face 片帮
- Controlling of rib spalling of "three soft" seam using injecting water to wall with shallow hole 煤壁浅孔注水控制"三软"煤层煤壁片帮
- 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。
- According to the characteristic of moving boundary of coal face , the authors set up the heat conduction differential equation and studied the dimensionless form of the equation. 根据回采工作面移动边界的特点，建立了动坐标下的围岩导热微分方程，研究了该方程的无因次形式；
- The result shows that the borehole destruction occurs in the dynamic process of coal face advancing, and it is more stable when the borehole location is close to tailgate. 认为钻孔的破坏是随着工作面推进而发生的动态过程，布置在靠近回风巷侧钻孔更加稳定。
- The middle pan of scraper conveyor not only is main transport passage way of coal face,but also the base of shearer haulage and connector with hydraulic supports. 刮板输送机中部槽是输送煤炭的通道,是采煤机运行的基座,是液压支架的连接体,对其进行优化设计可以降低生产成本,提高整机的可靠性。
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- Prohibition was laid on the export of coal. 禁止煤炭输出。
- He put a shovel of coal on to the fire. 他往火炉里加了一铲煤。
- We had a big delivery of coal today. 今天我们收到大批订购的煤。
- In the comprehensive treatment of coal face gas in Panyi Mine, high level suction roadway above the coal seam top and embeded suction pipe were used to draw out gas, which obtained good effect. 介绍了潘一矿在综合治理采煤面瓦斯的过程中,利用在煤层顶板施工高抽巷,高抽巷内埋设抽放管路抽放瓦斯,加强抽放取得显著效果;
- The coal seam hydraulic drill can replace coal electric drill,of coal seam composed of this gear motor will replace electric coal drill,and will be widely used for drilling of coal face. 以乳化液为工作介质的煤层液压钻可取代煤电钻,广泛用于采煤工作面的煤壁钻孔工作。
- The country is short of known deposits of coal. 这个国家缺少已知的煤矿矿床。
- Risk Analysis on Coal Mine Rib Spalling 煤矿片帮冒顶危险性分析
- An inexhaustible supply of coal. 用之不竭的煤炭供应
- SZ), now had to face the agony of coal dropped. SZ)，如今不得不面对煤价大幅下跌的苦恼。
- It is a main part of the aspirating system of the coal face. 设计的任务主要是对喷雾泵进行设计并进行必要的校核。
- This old coal face is to be reworked next week. 这个旧的采煤工作面下周将重新开采。
- China has a wealth of coal, iron and other minerals. 中国有丰富的煤、铁和其它矿产资源。
- The oven holds sufficient heat to fire up a fresh charge of coal. 炉里有足够的热量使新加进的煤燃烧起来。
