同时指出，顶板岩层流变会降低顶板结构承载能力，促使变形失稳发生。
It is also pointed out that rheology of roof rock will reduce the carrying capacity of roof structure and will induce deformation instability.
论述了两项关键技术分别由顶板岩层结构探测仪和顶板微变形监测仪两个仪器来实现。
The two topic technologies can be realized by detecting structure instrument of the roof rock and micro-deformed monitoring instrument.
针对顶板岩层对煤体冲击的影响作用机理，采用实验室物理模拟试验、UDEC 4。
Aiming at the influence effects of roof stratum on rock burst, the research methods of physical simulation experiment in laboratory, UDEC 4.
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