soft coal造句
1, Soft coal is notorious for its content of pollutants, such as sulfur.
2, Further, soft coal sometimes contains dangerous concentrations of toxic materials such as arsenic, antimony, and cadmium.
3, The paper introduces some mining measures in soft coal seam of Linnanchang Mine and soft floor by leaving top coal. The measurements ensure safety mining.
4, The combustion parameters of petroleum coke are between soft coal and anthracite .
5, After entering the soft coal mining, mining conditions have changed fully mechanized caving face in tandem with changes in the layout.
6, This project is to use soft coal as material and the modern advanced technique of Heer gas compressing to produce methanol, which is accorded with the industrial of the state.
7, One of these natural materials originates from organic humates in the leonardite (soft coal)stage from ancient humus beds.
8, As well as the related information of deformed soft coal in study area was got by this technology; dangerous districts of coal and gas outburst were forecasted in study area.
9, The surrounding rock of roadways in soft coal seam has low strength and bad stability.
10, The mechanism and control of coal seam with soft coal, roof and floor roadway floor heave is a difficult problem in mining subject.
11, The project takes pyrogenic dry distillation gas of soft coal in continuous retort as the fuel gas and produces ferroalloy coke and crude tar oil.
12, The excess mortality was attributed to coal mining and the extensive use of soft coal in the mining areas.
13, The caving reasons of the rib area in front of supports is analyzed, at the fully mechanized caving coal face, in the hard roof, soft coal, soft bottom and large inclination thick coal bed.
14, After spring plowing it looks oil-blackened or colored by the soft coal which occurs in great veins throughout the state.
15, A new - style gasification method of high volatile content soft coal is mentioned in the paper.
16, It has good coal adaptability and is especially suitable for soft coal that has high tar content and big gas output.
17, There are many kinds of forms of gas discharge, but the main form is soft coal seam gas discharge.
18, The results can satisfy with fundamental needs for finding the distribution laws of tectonic soft coal in mines with coal and gas outburst (at non mining area especially).
19, Secondly, using numerical analysis software UDEC3.1 to further analysis of very soft coal fully mechanized face immediate roof and the structure of top coal, the bearing pressure distribution.
20, In this thesis, experimental analyses are used to investigatecombustion and pollutant emission performance of anthracite, lean coal, soft coal, lignite and blended coals.
21, The combustion characters of petroleum coke were between those of soft coal and anthracite.
22, Drilling borehole in hard coal seam is mostly used to discharge gas, and cross layer borehole, roof rock borehole and laneway are mainly used to discharge gas in soft coal seam.
23, Based on the difference between hard coal and deformed soft coal on physical characteristics, analyzing the response that deformed soft coal seam is on well log.
24, There are of forms of gas discharge , but the form is soft coal seam gas discharge.