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- soft coal roadway 松软煤层巷道
- three soft coal roadway 三软煤巷
- Soft coal burns with more flames than hard coal. 烟煤燃烧时火焰较无烟煤多。
- But the pubic only has soft coal, no any char. 可公家只有烟煤,没有干炭。”
- Avoiding spontaneous ignition using plug-pipe grouting filling with loess in extra-high soft coal roadways 黄土充填插管灌浆防治特厚松软煤巷自然发火
- We also supply blind coal and soft coal from China and Indonesia. 煤炭产品主要是无烟煤与有烟煤等。
- Existing Problems of Coal Roadway Bolting Technology in Datong Coalmines Group Co. 煤巷锚杆支护技术在同煤集团应用中存在的问题。
- The results show the combined roof trusses has a practical support effect in coal roadway. 研究表明组合桁架锚杆对煤巷具有良好的支护效果。
- Poor machining quality of drillpipe of coal roadway drilling machine and the cause of rupture on case are analysed. 分析了煤矿用坑道钻机钻杆的加工质量问题和现场使用时产生断裂的原因。
- The combined support with cable bolt wire mesh and shotcreting is applied in coal roadway in Xingan Coal Mine of Hegang Mining Industry Group. 鹤岗矿业集团兴安煤矿在煤巷中应用锚索锚杆挂网喷喧支护,取得了较好的技术经济效果。
- In 1997, the Xingtai Mine succeeded in using bolting &boltmesh supporting tech. in coal roadway(supporting the top coal along the bottom). 1997年,邢台矿在全煤(沿底托顶煤)巷道采用锚杆加锚索的支护技术获得成功。
- According to the experiences with rapid drilling in mechanized caving coal roadway, the author analyzes and proposes the measures to improve drilling - speed. 根据多年机掘煤巷快速掘进施工经验进行因素分析并提出了进一步提高快速掘进的措施。
- Owing to the the fact that the difficult-to-work seams account for over 90% of these worked by hydromines,tbe coal roadway bolting technique has made slow progress. 由于煤层地质构造复杂,煤厚变化大等难采煤层条件在水采矿区占90%25以上,故水采矿井煤巷钻杆支护技术发展缓慢。
- 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。
- Finally great depth of burial, long time and higher temperature may metamorphose the lignite into soft coal or bituminous coal and in extreme cases, to hard coal or anthracite. 褐煤经长时间进一步的深埋以及较高的温度的作用,便可变成软煤或烟煤,再进一步变化,便成了硬煤或无烟煤。
- By means of similarity-simulation test the authors have studied the displacement law of surrounding rock in coal roadway supported by the roof trusses,bolt-mesh shoterete and H-beam steel. 通过相似模拟试验,研究煤巷采用组合桁架锚杆、锚架网和工字钢支护时的变形玻坏规律,由此对比分析探讨组合桁来锚杆的支护效果。
- In the meantime, measuring expansion energy of initial releasing gas of soft coal in Ma jia gou 0521 and absorb constant and remains gas content. 同时,对马家沟矿0521软分层的煤样进行了初始释放瓦斯膨胀能试验及吸附常数和残余瓦斯含量的测定。
- 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. 本项目是以烟煤在连续炭化炉中热解的干馏煤气作为城市燃气,同时付产铁合金焦和粗焦油。
- Benzene Clear, colourless, flammable volatile spirit. It is narotic and toxic, obtained when soft coal is heated in the absence of air, used as a medium for carrying gravure inks. 是透明,无色,可燃烧,挥发性酒精。它具麻醉性和有毒。是软煤在无空气下加热生成。用作凹版印刷油墨的介质。
- 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. 该项目利用烟煤为原料,采用当代先进的谢尔加压煤气技术建设,符合国家产业政策。