CAJ | 학술논문

逾渗是一种分形模型，利用声发射点定位盐岩内部破坏网格来建立逾渗模型，可以分析三轴压缩条件下盐岩逾渗特征以及损伤演变发展。研究发现，各试样逾渗模型团簇（cluster）数与最大团簇占有率关系曲线斜率在70%应力峰值后基本相等，利用最大团簇沿试样轴向的延伸来描述裂缝的扩展规律，并通过最大团簇在轴向的延伸终点得到了各试样逾渗的临界破坏比率，它对于研究渗透陡增点非常重要。提出利用逾渗关联长度（关联长度?代表处于同一团簇中的两个点的平均距离）确定试样损伤起始点，并通过计算逾渗模型破坏比率得到损伤变量，它和基于AE振铃计数以及AE能量计算得到的损伤变量结果相近。研究结果表明，逾渗可以形象地表述岩石内部破裂过程和损伤情况，为研究岩石破坏失效及裂缝衍生发展提供了新的思路。
유삼시일충분형모형，이용성발사점정위염암내부파배망격래건립유삼모형，가이분석삼축압축조건하염암유삼특정이급손상연변발전。연구발현，각시양유삼모형단족（cluster）수여최대단족점유솔관계곡선사솔재70%응력봉치후기본상등，이용최대단족연시양축향적연신래묘술렬봉적확전규률，병통과최대단족재축향적연신종점득도료각시양유삼적림계파배비솔，타대우연구삼투두증점비상중요。제출이용유삼관련장도（관련장도?대표처우동일단족중적량개점적평균거리）학정시양손상기시점，병통과계산유삼모형파배비솔득도손상변량，타화기우AE진령계수이급AE능량계산득도적손상변량결과상근。연구결과표명，유삼가이형상지표술암석내부파렬과정화손상정황，위연구암석파배실효급렬봉연생발전제공료신적사로。
As a fractal model, percolation method can analyze salt rock failure process and damage evolution under triaxial compression by creating a percolation model to locate the salt rock failure grid by using acoustic emission (AE). Percolation model shows that the slope of relationship curves between cluster number and the largest cluster occupancy for each specimen percolation model is basically equal after 70% of peak stress. The extension of the largest cluster along the specimen axially agrees with the evolution of cracks;and the critical failure probability is determined by the end of the largest cluster in axial direction, which is very important for the study of the sharply increased permeability point. The starting point of damage is determined by the correlation length of percolation, the average distance between two points in the same clusters, and the damage factor is calculated by percolation model failure probability which is accordance with the damage factor calculated according to AE parameters such as AE count numbers or AE energy . The research results show that percolation is a promising method to describe rock failure process and damage status so as to provide a novel approach for studying the rock failure and its cracks propagation.