CAJ | 학술논문

在采空区上方修建构筑物地基稳定性评价是目前岩土工程届一个较新的课题.采空区地基稳定性评价及后期地基处理技术的选取在很大程度上取决于采煤过程中采动岩体的损伤破坏规律.本文用相似材料模拟实验模拟再现了不同采深采厚比采煤过程中对其顶板到地表岩体的损伤破坏形成过程,并运用损伤力学理论分析采空区垮落带、裂隙带岩体损伤的变化规律,并建立了损伤变量与开采推进距离的相关关系.结果显示:不同采深采厚比岩体损伤不同,采深采厚比较小的采空区损伤变量偏大,且垮落带损伤变量是裂隙带的1.06~1.16倍,采深采厚比较大的采空区垮落带损伤变量是裂隙带的1.02~1.06倍.
재채공구상방수건구축물지기은정성평개시목전암토공정계일개교신적과제.채공구지기은정성평개급후기지기처리기술적선취재흔대정도상취결우채매과정중채동암체적손상파배규률.본문용상사재료모의실험모의재현료불동채심채후비채매과정중대기정판도지표암체적손상파배형성과정,병운용손상역학이론분석채공구과락대、렬극대암체손상적변화규률,병건립료손상변량여개채추진거리적상관관계.결과현시:불동채심채후비암체손상불동,채심채후비교소적채공구손상변량편대,차과락대손상변량시렬극대적1.06~1.16배,채심채후비교대적채공구과락대손상변량시렬극대적1.02~1.06배.
Foundation stability evaluation is a relatively new subject in the geotechnical engineering about builting structures above goaf. Foundation stability evaluation and selection of founda-tion treatment technology of goaf is decided by damage rule of mining rockmass In the process of coal mining. In this paper, form roof to surface, the formation process of rockmass damage was simulated by similar materila simulation, It researches the damage variable rule of the caving zone and the fractured zone rockmass using the damage mechanical theory. It establishes the correlaton between the damage variable and the push distance of mining coal. The concluations indicates: the different ration of mining deep and mining thick, the rockmass damage is different, and the ratil is smaller ,the damage variable is bigger, and the damage variable of the caving zone is 1.06~1.16 times of frac-tured zone, but the damage bariable is times 1.02~1.06 times of fractured zone in the bigger ratio of mining deep and mining thick.