不同采深采厚比采动岩体损伤变化规律相似模拟  

Similar Simulation of Mining Rockmass Damage Change Rule of Different Ratio of Mining Deep and Mining Thick

作　　者：刘秀英[1] 张永波[2] 晋明杰[1] 栗振锋[1] 

机构地区：[1]太原科技大学交通与物流学院,山西太原030024 [2]太原理工大学水利科学与工程学院,山西太原030024

出　　处：《国土与自然资源研究》2013年第2期61-62,共2页Territory & Natural Resources Study

基　　金：国家自然科学基金项目(51078250)

摘　　要：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。Foundation stability evaluation is a relatively new subject in the geoteehnical engineering about builting structures above goal. Foundation stability evaluation and selection of founda- tion treatraent 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 roekmass 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 bailable is times 1.02-1.06 times of fractured zone in the bigger ratio of mining deep and mining thick.

关 键 词：采动岩体 采深采厚比 相似模拟 损伤变量 

分 类 号：TU452[建筑科学—岩土工程]