2) support and shield type
支撑掩护式
1.
Mainly introduces one kind system design method of the support and shield type hydraulic pressure support for the coal bed of thickness 3.
5-8 m,煤层倾角8°的支撑掩护式液压支架的总体设计方法,包括架型选择、基本参数确定、四连杆机构设计、整体受力分析和立柱参数确定等设计步骤。
2.
One kind system design method of the support and shield type laying down top coal hydraulic pressure support was introduced,including the design procedures of the choice of hydraulic pressure support types,the basic parameter determination,the design of four link motion gear,the overall stress analysis of hydraulic pressure support and the column parameter determination and so on.
主要介绍了支撑掩护式放顶煤液压支架总体设计的方法,包括支架架型选择、外载荷和支护性能分析、基本参数的确定、四连杆机构设计、整体受力分析和立柱及柱窝位置确定等设计步骤。
3) two-leg shield
两柱掩护式
1.
By analyzing the questions showed in four-leg shock top-cave support,considering the better adaption of two-leg shield support for coal seam conditions,after a mount of demonstration,I design this two-leg low-position shield top-caving support,which is a new kind and further opens a new adaption situation for hydraulic support.
通过对四柱支撑式放顶煤液压支架存在问题的分析和两柱掩护式液压支架对煤层条件的良好适应性,经过大量的分析和论证,设计了两柱掩护式低位放顶煤液压支架,该型液压支架的设计和开发,为放顶煤液压支架的推广和应用提供了广阔的前景。
2.
9 seam of Xingtai Mining Area,the paper analyzed the selection and application of the four-leg shock support hydraulic powered coal caving supports and hydraulic two-leg shield supports in each mine of Xingtai Mining Area base on the top coal caving technology in the recent years.
在介绍邢台矿区9号煤的地质赋存情况、特点及开采方式的基础上,分析了近几年来采用放顶煤技术中,四柱支撑式放顶煤支架和两柱掩护式放顶煤支架及配套设备在邢台矿区各矿的选型和应用以及在使用过程中的经验教训,并对2种架型及配套设备的优缺点、使用前景及选用原则进行总结。
4) shield support
掩护式支架
1.
By calculating the load-carrying ability,the angle between the canopy and the shield,and the stroke of the stubilising ram,the peper makes a detailed study of influences of the connection position dimensions on performances of two-leg shield supports using computer simulation analysis, and lays the theoretical foundation for designing the rational connection position dimensions.
探讨了平衡千斤顶定位尺寸对二柱掩护式支架承载能力，顶梁与掩护梁间夹角和平衡千斤顶行程等支架性能的影响。
2.
Balance ram is a key component of a two-leg shield support.
平衡千斤顶是二柱掩护式支架的关键部件，在实际工作过程中时常发生损坏。
3.
Taking a two-leg shield support as an example,this paper presents the theory of the shield supporting ability areas.
本文以二柱掩护式支架为例。
5) covering interference
掩护式干扰
6) hydraulic shield support
掩护式液压支架
1.
The article elaborate on a strong point of ZY6000-25/45 hydraulic shield support,which is increasing useful time of upright post,meet the needs of traffic condition and geological condition,proving two plan of technical reform of ZY6000-25/45 hydraulic shield support.
通过论证ZY6000-25/45掩护式液压支架在技术改造中的两个方案,阐述了ZY6000-25/45掩护式液压支架改造的创新点在于能增加立柱使用寿命,满足运输条件要求,也符合工作面地质条件的要求。
补充资料：欧洲式期权、美国式期权与亚洲式期权
欧洲式期权、美国式期权与亚洲式期权
【欧洲式期权、美国式期权与亚洲式期权】期权合约所规定的权利有一定的时效期，过了失效日后，权利即行作废。一些期权规定权利仅能在有效期的最后一天执行，这种期权被称为欧洲式期权(ell功pean叩tions);另一些期权则容许在有效期内任何一天执行，这种期权被称为美国式期权(一~oPtions)。值得指出的是，虽名为欧洲式或美国式期权，但已无任何地理上的意义。由于欧洲式期权的规定过于严格，又出现了一种“改变的欧洲式期权”，它允许期权在一定的时间范围内进行交易。可见，美国式期权为期权购买者提供了更多的选择机会，因此，它的购买者也往往需支付更高的保险费。近年来无论在欧洲或美国，所交易的期权均以美国式为主，欧洲式期权虽仍存在，但其交易量已比不上美国式期权。 在so年代末期，市场上又出现了一种所谓亚洲式期权(asian ontions)，但也无地理上的意义，其差别主要在于履约价值(exe而sev公此)的计算。以买权为例，无论是美国式期权或是欧洲式期权，执行权利所能得到的履约价值均为当时标的物的市价减去履约价格，再乘以合约所定的数量，但亚洲式期权的履约价值则为权利期间内标的物市价的平均(计算至履约日为止)，减去履约价格，再乘以合约所定的数量。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条