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- Under this condition, the preventive measure was increasing the porosity of coal mass and deceasing the circulating channels of gas and air. 提出了增加卸载区的范围,促使煤体裂纹稳定扩展,降低单位煤体储能从而控制冲击矿压发生的原理。
- The dilatation process of coal mass is depicted by 3 characteristic quantities,namely,volume compression,steady dilatation and dilatation mutation. 用3个特征量描述了煤体扩容变化的过程,即体积压缩、稳定扩容及扩容突变。
- Through the testing research about gas drainage on outsize coal sample, the relativity of coal mass deformation and drainage quantity &time is opened out. 通过大煤样的瓦斯排放试验研究,揭示了顺序加载与逆序加载下的煤体变形与瓦斯排放量以及排放时间的相关性。
- The analysis indicates that the interior change of coal sample mainly leads to the synchronous and coherent variations of coal mass and oxygen physisorption. 分析表明,煤样内部的氧化变化是导致其质量和吸附氧气量发生同步、一致变化的根本原因。
- The process of dilatation change of coal mass was depicted by three characteristic quantities, such as volume compression, steady dilatation and dilatation mutation. 用三个特征量描述了煤体扩容变化的过程;体积压缩、稳定扩容及扩容突变。
- 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。
- The country is short of known deposits of coal. 这个国家缺少已知的煤矿矿床。
- A small lump or mass, as of coal. 圆堆一小块或堆,如煤
- An inexhaustible supply of coal. 用之不竭的煤炭供应
- The exploration strategy of coal bed methane of coal basin in low coal rank in northwestern China 浅议我国西北低煤阶含煤盆地煤层气的勘探对策
- 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。
- Practise of Using the Mobile Methane Pumping Station for Managing the upper Comer Angle Methane of Coal Faces 用移动式瓦斯抽放泵站治理采面上隅角瓦斯的实践
- 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。
- We are talking about the ignitability of coal. 我们在谈论有关煤炭之可燃性。
- The uses of coal are by no means limited to those. 煤的用途何止那一些。
- This seam of coal reposes on a layer of clay. 这个煤层处于一层黏土岩之上。
- Our stock of coal has not renewed yet. 我们的煤炭储存量还没有补充过。