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- key stratum structure 关键层结构
- The idea of key stratum pressure is put forward, and the ground pressure is mainly influenced by the breakage of key . 提出主关键层来压的新概念,指出回采工作面矿压显现程度主要受主关键层破断的影响。
- The caving of thick and strong roof stratum,key stratum,causes tremendous rock pressure in mine. 采场上覆岩层中的厚硬岩层,即厚硬关键层,其冒落会造成剧烈的矿山压力显现。
- According to the model,applying the cusp catastrophic theory the mechanics mechanism of water inrush is analyzed from key stratum of floor. 当满足关键层失稳的充要力学条件时,承压水底板有可能发生失稳突水。
- Satisfying the sufficient mechanics condition for key stratum instability, a water inrush is likely to happen in the floor. 当满足关键层失稳的充要力学条件时,承压水底板有可能发生失稳突水。
- Based on the structural characteristics of floor in the longwall face, the structural model of the key stratum (KS) in floor is established. 根据采场底板岩体结构特征,建立了底板岩体的关键层(KS)结构模型。
- Based on the analyzing of parameter about combinatorial key stratum, the formulae of calculating the roof weighting step is given in this article. 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。
- Studied the shock bump caused by the key stratum movement in Huafeng Colliery using the microseism locating and monitoring technology. 摘要采用微地震定位监测技术对华丰煤矿关键层运动诱发矿震进行了研究。
- However, everything has its two sides, Throughout the course of Chinese social stratum structure at this stage, a series of negative factors threaten the social stability as a necessity. 然而,任何事物都具有两面性,现阶段中国社会阶层结构在变迁进程中所产生的一系列负面因素,必然会威胁到社会的稳定。
- The main key stratum that is made up of the hard stratum covering over the coal seam has a great influence on rock burst. 摘要煤层上覆坚硬厚层岩层组成的主关键层对冲击矿压的发生具有强烈的影响。
- Since the reform and opening on, our country has greatly changed in the respects of politic、economy、social organization and social stratum structure and so on, and engendered new social ranks. 摘要改革开放以来,我国在政治、经济以及社会组织和社会阶层结构等方面都发生了很大变化,产生了新的社会阶层。
- The basic conditions of landslide development are the stratum structure and the tectonic geology mainly, and the induced factors are the rainfall, impoundment, the activities of human being and so on. 分析认为,滑坡发育的基本条件有软硬相间的有利地层结构、地质构造条件等;滑坡发育的诱发因素有降雨、水库蓄水及人类活动等。
- Based on the 3D rock cracking imaging, obtained the conclusions: key stratum can be classified according to the special attribution of the microseismic cracking events. 根据岩体在三维空间的破裂成像,得出:可以依据微震破裂事件的空间分布对关键层进行划分;
- The loci of plastic hinge line and the maximum load during first roof weighting are determined by using kinematical method, and the minimum span of roof key stratum is derived. 利用机动法确定了老顶岩板初次来压时载荷的上限值和塑铰线的位置,得到了顶板岩体关键层的最小破断跨距。
- The study indicates that according to the formulae of combinatorial key stratum, coal roof weighting step in the 1203 face in Da-liu-ta mining is co the observation value. 结果表明,以该修正的组合关键层破断距公式计算的大柳塔1203工作面的初次来压步距与实测非常接近。
- The Ion of plastic hinge line and the maximum load during first roof weighting are determined by using kinematical method, and the minimum span of roof key stratum is derived. 利用机动法确定了老顶岩板初次来压时载荷的上限值和塑铰线的位置,得到了顶板岩体关键层的最小破断跨距。
- Meteorite strike events have severe, great and long-term impact on strata structure of the earth surface. 历史上发生的陨击事件对地球表面岩层构造产生了极其严重、深刻和长远的影响。
- 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。
- A detection method of roof strata structure is put forward and the application of the method in Guhanshan coal mine in Jiaozuo is introduced. 提出了一种顶板岩层结构探测方式,介绍了该探测方式在焦作古汉山煤矿应用的情况。
- Arid, from the point view of MT methods, given is the formulas for forward problem to EDA included two strata structure. 然后,从大地电磁测深法的角度,详细地推导了双层地层(含裂隙)结构的视电阻率正演公式。