| 1. | Viscoelasticity analysis and application of key strata of covering rock to short wall mining
短壁开采覆岩关键层黏弹性分析与应用 |
| 2. | Combinatorial key stratum is the development of key stratum in shallow coal seam , it has the all properties of key stratum and itself ’ s property
摘要在分析组合关键层有关参数的基础上，推导出了组合关键层初次来压步距和周期来压步距的计算公式。 |
| 3. | This study is the development of key strata theory in ground control research , which will strongly promote the development of the key strata theory in ground control and its technique
本项研究是岩层控制的关键层理论研究的深入和发展，将有力促进岩层控制理论和技术的发展。 |
| 4. | It is pointed that the thick unconsolidated layers above roof have effect on post - buckling behaviors of key stratum , the equilibrium path of roof is unstable from breaking to final subsidence
研究发现，顶板上覆厚松散沙层对关键层的后屈曲性态有影响；顶板从破断至极限下沉其平衡路径不稳定。 |
| 5. | Key strata is a rock seam which plays an important controlling roles in the movement of mining overlayer strata while the key strata is sometimes made up of two or more compound rock strata
摘要在采场覆岩运动中起主要控制作用的岩层为关键层，而有时关键层是由2层或2层以上岩层形成的复合岩层所组成，我们称其为复合关键层。 |
| 6. | With a specially designed experimental instrument , the mechanism of load transfer within an unconsolidated confined aquifer and its effect on compound breakage of key strata have been studied
摘要采用专门设计的物理模拟试验装置及数值模拟试验方法，就松散承压含水层的载荷传递机制及对覆岩关键层复合破断的影响进行深入研究。 |
| 7. | The example analysis indicates that the compound key strata objectively exists in the motion of rock strata , and it plays a much more important controlling role than that of single rock , which is separated from same rock groups
实例分析表明，复合关键层在岩层运动中是客观存在的，比同组岩层分开后的单一岩层的控制作用的线性叠加要大得多。 |
| 8. | Therefore , in the process of load transfer within the unconsolidated confined aquifer , the key strata of overburden rock are prone to have a compound breakage when the load on the upper interface of bedrock is great and the bedrock is very thin
在松散承压含水层的载荷传递作用下，作用在基岩顶界面的载荷较大，当基岩厚度较薄时，采场覆岩关键层易产生复合破断。 |
| 9. | This paper , for the first time , adopts the discontinuous deformation analysis ( dda ) to model respectively the structural patterns , forms , displacement and key stratum ( dynamic modeling ) for arches with three - grips and grip beams in excavated rockmass , and some significant conclusions are drawn out
首次采用非连续变形分析( dda )法，对采动岩体结构中的“三咬拱”结构模式、形态、位移与关键层等进行动态模拟，得出一些有意义的结论。 |
| 10. | Because the loader and the moduls of elasticity exists part difference in key stratum and combinatorial key stratum , and the formulae of calculating the roof weighting step has difference , so there must be existing big error if we use the formulae of key stratum to calculate the shallow coal seam ' s weighting parameter
大柳塔1203工作面按照关键层计算得出的顶板来压步距与实际相差很大，而按照组合关键层计算得出的顶板来压步距与实际基本吻合。 |
