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针对已有突变理论仅对单块板裂岩体进行分析的局限性,提出将板裂化岩体作为整体进行研究,考虑了劈裂岩体间的水平应力,改进了突变理论模型在岩爆分析中的应用,并分别计算对比了单块岩板及板裂岩板组合在准静力及动力扰动两种条件下的岩爆倾向性。研究结果表明,准静力条件下单块岩板突变特征值?变化趋势平缓,而组合岩体由于等效抗弯刚度较大,?急剧增大;准静力条件下岩板组合的岩爆深度明显大于单块岩板时,岩爆深度达到0.76 m;随岩板厚度增加,突变特征值?逐渐增大,不再满足岩爆的充分条件,施加竖向扰动应力即可重新满足突变条件,所需外界扰动应力由几兆帕增大至几十兆帕。
Aiming at the limitation of the existing catastrophe theory to analyze the single-block rock mass, the authors put forward that the plate cracking rock mass should be considered as a whole, the horizontal stress between the rock mass and the rock mass should be considered and the catastrophe theory model should be improved The rockburst propensity of the single block and the slab-slab combination under both quasi-static and dynamic disturbances was calculated and compared respectively. The results show that the eigenvalues of monolithic slab vary steadily under quasi-static conditions, while the composite rock mass increases sharply due to the larger equivalent flexural rigidity, and the rock burst The depth of rockburst reaches 0.76 m when the depth is significantly larger than that of a single rock. With the increase of the thickness of the rock, the sudden change of eigenvalue gradually increases and no longer satisfies the sufficient condition of rock burst. By applying vertical disturbing stress, , The required external disturbing stress increased from a few megapascals to tens of megapascals.