Water inrush from the bottom coal layer in mining work faced now is rather serious in Northern China coalfield, which constraints seriously the normal economical benefits.
在我国华北煤矿区，回采工作面煤层底板突水问题相当严重，困扰着煤矿经济效益的正常发挥。
And the Fuzzy-follower is applied in shaft bottom coal conveyor of a medium-sized coal mine and gives good results. Thus, it solves the problem of power balance of double-motor driving system.
该模糊跟随器在某中型煤矿的井下原煤运输系统中进行了实际应用，效果良好，较好地解决了双电机拖动系统的功率平衡问题。
He'd be at home in Buckingham Palace or at the bottom of a coal mine, he said.
“无论在白金汉宫，还是在煤矿坑底，他都很自在吧。”他说。
In developed countries, coal is the most hazardous (bottom left), according to the Paul Scherrer Institute in Switzerland, which studied more than 1, 800 accidents worldwide over nearly 30 years.
根据瑞士保罗·谢勒研究所对近三十年世界范围内超过1800其事故的研究结果，煤炭行业是最危险的(见左边底部)。
The coal ash settles out to the bottom, and the remaining water gets discharged, untreated, into the Missouri River.
煤灰沉入水底，而未经处理的水则就流入密苏里河中。
The coal and limestone storage yard must have a bottom impermeabilization system. This system may be constituted by a clay layer, a geomembrane layer, or other impervious material.
煤料和石灰石存放场必须有底部防渗系统。该系统可由粘土层、地质处理用膜层、或其他防渗材料组成。
Into the right internal car washing raw coal to coal, then the bottom of the sampling, to further strengthen internal quality management.
对内部入洗原料煤采取车底部接煤取样，进一步加强了内部质量管理。
The paper stated the water inrush model of shearing failure at the karst sink hole bottom in North China coal field and analyzed the water inrush mechanism of the karst sink hole.
从论述华北型煤田岩溶陷落柱顶底部剪切破坏突水模式及判据入手，分析了井下溶陷落柱突水机理。
The existing state of trace element in coal and variation of operation conditions have great effects on the enrichment of trace element in fly ash and bottom slag.
微量元素在煤中的赋存形态和锅炉运行工况的变化影响微量元素在底渣和电除尘器飞灰中的富集。
The main target coal seam of Xieqiao Mine is directly covered with the Quaternary bottom gravels, whose impermeability affects the reasonable retainment of waterproof pillar.
第四纪底砾层直接覆盖在谢桥煤矿煤系地层之上，其隔水性能影响到防水煤柱的合理留设。
The high combustion temperatures melt together the coal ash (largely silica and alumna) and calcium sulfide solids to form an inert slag that drains from the bottom of the boiler.
高温燃烧使得炭灰(富含硅和铝)和硫化钙熔为一体，从而产生固体残渣，从锅炉底部溢出。
This paper introduces a method of producing metallization pellet with laterite nickel ore as raw material and coal as a reductant in car bottom continuous furnace.
介绍了一种利用台车连续炉，以红土镍矿为原料，煤粉为还原剂，生产镍铁金属化球团的方法。
In the bottom of coal measures is an acidic intrusive body, it is direct heat source of metamorphism, and provided the conversion of lignite to bituminous coal with thermodynamic power.
在本区煤系地层底部有一酸性侵人岩体，该侵入岩体是引起本区煤变质的直接热源，它提供了褐煤向烟煤转化的热动力。
Biofuels from corn and plant waste came right at the bottom of the list, along with nuclear power and "clean" coal.
而来自于玉米和植物废料的生物燃料则排名垫底，另外表现最差的还有核能和“清洁”煤。
A large number of floating impurities in the emulsion, and the valve chamber in the column bottom, left more coal, rock and iron tablets.
乳化液中有大量的漂浮杂质，在立柱缸底和阀腔，留有较多的煤粉、岩粒和铁屑。
The Carboniferous limestone system are thin layers of limestone. Those which influence coal extraction are mainly single layers of limestone over 4m thick at the bottom of Taiyuan system.
石炭系灰岩为薄层灰岩，对煤层开采有影响的灰岩主要是太原统底部单层厚度超过4米的灰岩层。
In order to provide scientific basis for mining coal-bed methane, it is necessary to analyze the pressure on well bottom.
为了给煤层气勘探和开发提供理论依据，必须对煤层气井井底瞬时压力进行分析。
It expounds various mining methods and steps, including the bench demarcated, plan mining bench top and bottom floor, the coal and overburden amount of plan mining, and coal quality indicators.
阐述编制露天矿的各种开采计划的方法和步骤，以及其台阶划分、计划台阶顶底板的控制、编制剥离量和采矿量及其煤质指标等；
The stress distribution and displacement variation of the coal top and bottom layer at different distances from the face are discussed;
探讨了煤体顶、底分层在距工作面不同距离上应力分布及位移变化特征的差异性；
Experimental results identified that fluorine in coal belong to volatile elements, fluorine in fly ash and bottom ash were non rich.
结果表明：煤中氟属于强挥发性元素，在煤灰中是非浓集的。
In coal, the mercury is concentrated in fly ash from boiler and dispersed into bottom ash.
煤中汞在锅炉飞灰中被富集，在底灰中被分散。
Natural selection double level without a sieve bottom wet material crusher efficient finely special equipment and name (coal gangue break) hammer.
天择双级无筛底湿料粉碎机高效细碎专用设备又名（煤矸石锤破）。
In order to reduce the coal loss and raise recovery ratio, the technique measures of backing poles and falling the bottom are adopted. The recovery rate of face resources is raised.
为了减少煤炭损失，提高回采率，在加采到底煤较厚地段时，采取背杆落底技术措施，提高了采面资源回收率。
The occurrence is steady and the structure is simple with FM, JM types of coal, whose roof is limestone and siltstone and bottom is muddy siltstone and sandy mudstone;
赋存稳定，结构简单，煤种为FM、JM，煤层顶板为石灰岩、粉砂岩，底板为泥质粉砂岩、砂质泥岩；
In combination with the top, meddle and bottom section features of the main coal silo, the paper studied the different anti failure technology and construction method.
结合主煤仓上中下不同地段的特点，研究了不同的抗破坏技术和施工方法。
And the cement sector, the coal mining sector and the machine tool sector are listed as the bottom three.
而水泥行业，煤炭采矿业和机床行业被列为是底部的三个。
The stability of main and immediate roof structure and its influence on strata behaviour are analysed. The failure features of roof coal between top and bottom slice are thoroughly studied.
深入分析了层间顶煤的破碎特点，指出层间顶煤的破碎效果是多因素综合作用的结果，而在不同的开采条件下将具有不同的放顶煤效果。
The stability of main and immediate roof structure and its influence on strata behaviour are analysed. The failure features of roof coal between top and bottom slice are thoroughly studied.
深入分析了层间顶煤的破碎特点，指出层间顶煤的破碎效果是多因素综合作用的结果，而在不同的开采条件下将具有不同的放顶煤效果。
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