(1. 華南理工大學 土木與交通學院，廣州 510640；
2. 中交城市投資控股有限公司，廣州 510290；
3. 北京科技大學 土木與環(huán)境學院，北京 100083)
摘 要: 為研究殘采激勵下復雜組合水平采空區(qū)群的動力響應，借助離散化方法，構建復雜水平采空區(qū)群動力響應模型。結合數(shù)值模擬，對某大型地下金礦山KT8礦體1100 m中段復雜水平采空區(qū)群進行動力響應及應力傳遞研究。結果表明：爆破激勵下，水平采空區(qū)群結構的改變幾乎不會對其作用巖體本身的位移響應和速度響應產生影響，但對其余部分巖體響應產生較為明顯的增幅，其中增幅最大的區(qū)域是水平采空區(qū)群的結構改變處巖體；爆破荷載對其作用巖體應力分布產生較明顯的變化，對其余部分巖體不會產生明顯的影響。現(xiàn)場工程結果表明，復雜水平采空區(qū)群間柱經殘采后，所形成新的大采空區(qū)穩(wěn)定性良好，空區(qū)周邊沒有發(fā)生大的位移變形，并驗證動力響應模型分析的可靠性，該方法為復雜采空區(qū)群殘采作業(yè)提供理論指導。
關鍵字: 采空區(qū)群；動力響應模型；應力傳遞；結構離散
（1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China;
2. CCCC Urban Investment Holding Company Limited, Guangzhou 510290, China;
3. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:In order to investigate the dynamic response of horizontal goaf group in complicated combination under residual mining excitation, a dynamic response modal of horizontal goaf group in complicated combination was established based on structural discrete. Dynamic response and stress transfer of horizontal goaf group in complicated combination on Level 1100 m of KT8 ore body in a large underground gold mine were researched combined with numerical simulation. The results indicate that the structure change of horizontal goaf group can not influence the displacement and velocity response of rock mass that blasting excites, while it would obviously increase the response of residual rock mass, among which the area of maximum increment belongs to structure change sector. Blasting load obviously impacts on stress distribution of rock mass it effects on while others not. Field engineering results show that goaf newly formed is in stable state and has no large displacement and deformation in the surrounding area after residual mining of horizontal goaf group in complicated combination, which verifies the reliability of dynamic response modal. A theoretical guidance has been provided for residual mining of horizontal goaf group in complicated combination.
Key words: goaf group; dynamic response model; stress transfer; structural discrete
