it is useful to improve security of mining and increase the recovery ratio and economic profit of mines to carry out dynamic control of ground pressure in stopes.

1、

application of copolymer pda to different industrial areas such as domestic chemicals, water treatment, paper-making, mining and petroleum recovery were respectively stated.

对PDA在诸多领域，如：日用化工、污水处理、造纸、采矿、石油工业等行业的应用情况作了分类阐述。

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2、

research on relationship of mining height and recovery of top-coal in full-mechanized caving mining

综放开采割煤高度与顶煤回收率相互关系研究

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3、

study on accuracy of mining reserves and recovery coefficient calculating for top-coal caving mining

放顶煤开采采出量与采出率计算精度的探讨

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4、

research and application on solution mining for gold recovery

溶浸采矿回收金矿资源的研究与应用

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5、

the extent of plastic zone is related to the mining depth recovery ratio and width of mined strip.

塑性区大小与开采深度、条带开采宽度及回采率有关。

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6、

compensation fee will not be levied by the method of some percentages of sales income multiplied by the coefficient of mining recovery, classified by mineral species and administrative jurisdiction of taxation instead.

取消补偿费一律按销售收入一定比例乘开采回采率系数这一征收方式，提出了按矿种分类、按征收管理权限分级新的征收方式。

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7、

research on layout of dislocated strata gateway applied to improve initial mining recovery rate of fully mechanized top coal caving mining

应用错层位巷道布置提高综放初采回收率的研究

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8、

mining recovery is a main economic-technical index to measure mine enterprise's levels of production management and resources comprehensive utilization.

回采率是衡量矿山生产技术管理、资源综合利用水平的一项主要的经济技术指标。

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9、

talking about the coefficient mining recovery

也谈开采回采率系数

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10、

brief introduction is also made of the selection of rational mining method for improving the mining recovery;

并简要叙述了该矿在采矿方面选择合理采矿方法，提高采矿回收率；

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11、

application of copper strip tension leveling line made in china

国产铜带拉弯矫直机的应用

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12、

localization of uncoiler drum for baosteel 1580mm leveling line

宝钢1580热轧平整线开卷机卷筒的国产化研制

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13、

application of strip tension leveling line

带材拉伸弯曲矫直机组的应用

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14、

development of first home-made high-precision copper strip tension leveling line

首台国产高精度铜带拉弯矫直机组的研制开发

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15、

electric control system of aluminum strip tension leveling line

铝带材拉弯矫直机组的电气控制技术

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16、

application of bus-terminal to strip tension leveling line

总线端子在带材拉弯矫直机组中的应用

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17、

designing and calculation of tension leveling line

连续拉伸弯曲矫直机设计与计算

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18、

physical cleaning for aluminum strip in tension leveling line

铝带拉弯矫直机组中的物理清洗

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19、

determination of main parameters of tension leveling line

拉弯矫直机组主要参数的确定

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20、

leveling annexed leveling line closed leveling line spur leveling line

附合水准路线闭合水准路线支水准路线水准网视线高程

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