CAJ | 학술논문

岩爆是深部高地应力区岩体开挖过程中常见的一种复杂的动力失稳现象。由于影响因素众多，且各因素在岩爆的孕育过程中所起的作用尚不十分明确，可以将岩爆与其影响因素间的复杂关系当作灰色系统，利用灰色聚类方法进行研究。根据岩爆的成因及特点，选取洞壁围岩的最大切应力σθ、单轴抗压强度σc、单轴抗拉强度σt及岩石弹性能量指数Wet作为影响岩爆的主要因素，并以应力系数σθ/σc、脆性系数σc/σt及弹性能量指数Wet作为评价指标，通过对灰色白化权函数进行优化，建立改进的岩爆预测灰评估模型。该模型解决了传统模型存在的灰类多重交叉性及不满足规范性等问题，理论上更完备。采用改进模型对国内外若干深部岩石工程岩爆初始数据进行研究，并与传统模型的预测结果进行对比，发现改进模型的结果与实际情况吻合更好，预测精度更高，从而验证了改进模型的有效性及实用性。研究方法为岩爆的准确预测提供一种切实可行的途径。
암폭시심부고지응력구암체개알과정중상견적일충복잡적동력실은현상。유우영향인소음다，차각인소재암폭적잉육과정중소기적작용상불십분명학，가이장암폭여기영향인소간적복잡관계당작회색계통，이용회색취류방법진행연구。근거암폭적성인급특점，선취동벽위암적최대절응력σθ、단축항압강도σc、단축항랍강도σt급암석탄성능량지수Wet작위영향암폭적주요인소，병이응력계수σθ/σc、취성계수σc/σt급탄성능량지수Wet작위평개지표，통과대회색백화권함수진행우화，건립개진적암폭예측회평고모형。해모형해결료전통모형존재적회류다중교차성급불만족규범성등문제，이론상경완비。채용개진모형대국내외약간심부암석공정암폭초시수거진행연구，병여전통모형적예측결과진행대비，발현개진모형적결과여실제정황문합경호，예측정도경고，종이험증료개진모형적유효성급실용성。연구방법위암폭적준학예측제공일충절실가행적도경。
Rockburst is a complicated dynamic instability phenomenon during the rock excavation of deep rock masses in high in-situ stress zone. It is affected by many factors,and the roles of various factors in the formation process of rockburst are not yet clear. Then,the complex relationship between rockburst and its influencing factors is considered as a grey system,which can be studied by the grey clustering method. According to the causes of rockburst and its characteristics,the main factors of rockburst,which are the maximum tangential stress of the cavern wallσθ,uniaxial compressive strength cσ,uniaxial tensile strength tσand the elastic energy index of rock etW ,are chosen in the analysis. Moreover,the evaluation indexes including the stress coefficient of rockσθ/σc , the brittleness coefficient of rockσc/ tσ,and the elastic energy index of rock etW are used to establish the modified grey evaluation model for rockburst prediction through the optimization of grey whitenization weight function. Compared with the traditional grey evaluation model,the modified model doesn′t have the crossing properties of grey cluster and meets the normality well,which is more reasonable in theory. Based on the rockburst data of some deep rock projects at home and abroad,the modified model is adopted to predict the possibility and classification of rockburst. Compared with the traditional model,the prediction error of the modified model is smaller. In addition,the prediction results of the modified model are close to the practical records,which proves that the model is effective and available. Therefore,the proposed method provides a practical way to accurately predict the possibility and classification of rockburst in deep underground engineering.