3) roof rule
顶板规律
4) roof(top coal)moving law
顶板(顶煤)活动规律
5) roof movement
顶板运动
1.
Based on numerical results of impacted roof movement at four stages which have been verified in-situ, the damping effects of roof movement at the impacted stage with three-dimensional distinct element code and chaotic dynamics theory are studied.
根据现场验证的冲击性顶板4个阶段运动特征的数值模拟结论,采用三维离散单元法研究冲击阶段顶板运动的阻尼效应,并进行相应的混沌动力学分析。
2.
After investigation of the main factors for roof movement, i.
利用离散元和有限元数值模拟及力学解析计算，分析了放顶煤采场中上覆岩层运动规律；认为采场上覆岩层运动为分层运动，运动结构为拱－梁结构；拱－梁转换的实现，是以拱顶的失稳升高为条件，在分析了影响顶板运动的主要因素（顶板岩层断裂角、放煤步距、顶板岩层块体尺寸、顶煤厚度）的基础上，认为放煤步距过大（≥２ｍ）会降低放煤率，增大老顶垮落的动压冲击程度。
6) movement rule
运动规律
1.
Numerical simulation of the dust movement rule in fully-mechanized coal faces;
综采工作面粉尘运动规律的数值模拟
2.
Numerical simulation analysis of the movement rules of projectile in soil;
弹体在土壤中运动规律的数值模拟分析
3.
The differential equations of three mass points are derived for different mass relations between them,and their analytic solutions are obtained,by which the movement rule of three mass points are discussed.
分析了一个由三质点和弹簧构成的系统的运动问题,给出了三质点质量满足不同关系时各质点的运动微分方程,求出了运动微分方程的解析解,并由此讨论了各质点的运动规律。
补充资料：矛盾规律(见对立统一规律)
矛盾规律(见对立统一规律)
law of contradiction
mQOCun gu】j口、矛盾规律(lawof eon‘radietion)统一规律。见叶主
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