(1 遼寧工程技術(shù)大學(xué)， 阜新 1230002 中國(guó)礦業(yè)大學(xué)北京研究生部， 北京 100083
3 煤炭科學(xué)研究總院， 北京 100013
)
摘 要: 礦山開采沉陷是具有初始損傷的巖體在采動(dòng)應(yīng)力作用下所發(fā)生的再變形和再破壞過程， 巖體中的初始損傷影響著巖體的力學(xué)行為和變形破壞特征， 因此， 研究和預(yù)測(cè)巖體采動(dòng)沉陷， 必須考慮巖體的損傷效應(yīng)。 通過構(gòu)造具有初始損傷的巖體采動(dòng)沉陷實(shí)驗(yàn)?zāi)Ｐ停?研究了巖體采動(dòng)沉陷的損傷效應(yīng)。 研究表明， 巖體采動(dòng)沉陷量值主要取決于巖體中初始損傷在空間中的總占位， 其中的垂直移動(dòng)量(下沉)取決于巖體中初始損傷在豎直平面內(nèi)的總占位， 其占位越大， 下沉值越大； 水平移動(dòng)量取決于巖體中初始損傷在水平面內(nèi)的總占位， 其占位越大， 水平移動(dòng)值越大。
關(guān)鍵字: 巖體 采動(dòng)沉陷 損傷效應(yīng)
SURFACE DISPLACEMENT IN JOINTED ROCKS
（1 Liaoning Engineering and Technology University, Fuxin 123000, P. R. China2 Beijing Graduate School, China University of Mining and Technology, Beijing 100083, P. R. China
3 Central Coal Mining Research Institute, Beijing 100013, P. R. China
）
Abstract:Surface displacement caused by coal mining is an extremely complex process, the existence of joints makes rock stratum express the behavior of nonlinearity, heterogeneity and anisotropy in macro-structure and deformation. Two kinds of physical model, one containing no initial joints and another containing some initial joints, were employed to investigate systematically the influence of initial joints on the surface subsidence. Moreover, within the framework of damage mechanics, the influence of initial joints on the surface displacement was investigated, and the empirical relations between the character value of surface displacement and damage variable were obtained.
Key words: jointed rocks surface subsidence displacemen damage variable
