It is necessary to research into the burst failure and rock burst tendency of combined sample which is made up of roof, coal and floor.
研究顶板-煤体-底板所构成的组合煤岩体试样变形破裂规律及冲击倾向性对于预测冲击矿压具有非常重要的实践意义。
Roof falling, floor heave of roadway and pillar failure are important problems of rock mechanics in mining process.
顶板冒落、巷道底鼓和矿柱破坏是采矿过程中的重要岩石力学问题。
Unsupported floor as the main releasing channel for deformation and failure energy, has intensified the whole subsidence of roof surrounding rock.
无支护底板作为变形破坏能量主要释放通道，加剧了巷道顶帮围岩整体下沉。
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