The combustion characters of petroleum coke were between those of soft coal and anthracite.
石油焦的燃烧特性处于烟煤和无烟煤之间.
网络文摘精选
There are of forms of gas discharge , but the form is soft coal seam gas discharge.
目前在瓦斯抽放中急待解决的问题是软煤层瓦斯抽放的打钻技术,尤其是深孔打钻技术.
互联网摘选
The surrounding rock of roadways in soft coal seam has low strength and bad stability.
软煤巷道围岩强度低,稳定性差.
互联网摘选
在热天平试验中,烟煤随着氧气浓度的升高反应速度加快.
互联网摘选
A new-style gasification method of high volatile content soft coal is mentioned in the paper.
笔者提出了一种低变质烟煤新型气化的方法.
互联网摘选
The Application of Combined Supporting Coal Seam to Roadway Soft Rock Crossing Coal Faultage
软岩开拓巷道过煤层断层时联合支护的应用
互联网摘选
To decrease soft point of middle temperature coal pitch with anthracene oil
采用蒽油替代煤焦油降低中温煤沥青软化点
互联网摘选
由于煤层发育、软地层等原因使压裂技术尚未突破.
互联网摘选
三软不稳定煤层一次采全高液压支架关键部件设计
互联网摘选
应用以上成果，运用关键技术成功地维护了高地应力区极松散围岩放顶煤回采巷道。
互联网摘选
