2) key strata compound breakage
关键层复合破断
3) failure key point
破裂关键点
1.
A new conception,buckle key point and failure key point,is introduced.
通过理论分析及实验，阐明了曲面零件成型极限的意义，提出了成型极限危险点──起皱关键点及破裂关键点的概念，给出了起皱极限及破裂极限判据表达式，并得到了实验验证。
4) the key breakthrough points
关键突破口
1.
If we grasp the key breakthrough points(such as planting trees and grass to improve the ecological environment,preventing soil erosion,constructing the basic farmland to solve food problem and developing diversified economy to increase the income) and make a.
若能抓住关键突破口,如种树种草改善生态环境,防止水土流失,建设基本农田,解决粮食问题,开展多种经营,增加经济收入等,进行综合治理和开发,问题便将迎刃而解。
5) key strata
关键层
1.
Based on the technique of in-situ gob-side entry retaining with entry-in packing in fully-mechanized top-coal caving mining face(GEREPTF),the mechanical model of the surrounding rock for GEREPTF is established according to the key strata theories.
在综放巷内充填原位沿空留巷技术基础上,根据岩层控制的关键层理论,建立综放巷内充填原位沿空留巷围岩结构力学模型,推导出不同地质条件下巷内充填体的支护阻力计算公式,并对围岩与巷内充填体之间的相互作用机制进行深入分析。
2.
Aiming at the abnormal strata behavior in the advance entry of 1303 fully-mechanized working face in Xinglongzhuang coal mine,the movement rule,characteristic,step distance of fracturing,position and mode of fracturing of the overlying strata in mining process is analyzed by using the key strata theory.
针对兴隆庄煤矿一采区1303综放工作面超前平巷发生奇异压力的现象,采用关键层理论对在采动过程中的上覆岩层运动规律进行了详细的力学分析,研究了它们的运动特征、破断步距、断裂位置、断裂方式以及对工作面及其超前平巷的来压规律,对比分析了该工作面矿压实测数据与理论研究成果。
3.
The key strata control the process of the overlying strata movement and the dynamic expanding of the mining-induced fracture in coal mining stope,and then it will influence the gas dynamic emission of the adjacent layers in the mining-induced fractured rock mass.
煤矿覆岩中的关键层控制着上覆岩层的移动和采动裂隙的动态发展过程,进而也必将影响到邻近层瓦斯在采动破裂岩体内的动态涌出规律。
6) key stratum
关键层
1.
Resolving of thin base rock-gradient layer composite board and single key stratum;
薄基岩梯度复合板模型与单一关键层解算
2.
Stable characters of key stratum in stagger arrangement roadway layout top-coal caving mining;
错层位巷道布置放顶煤开采关键层的稳定特征
补充资料：关键
①门闩或功能类似门闩的东西。②比喻事物最关紧要的部分；对情况起决定作用的因素：摸清情况是解决问题的～丨办好学校～在于提高教学质量。③最关紧要的：～问题丨～时刻。
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参考词条