(1. 華南理工大學(xué) 土木與交通學(xué)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(xué) 土木與環(huán)境學(xué)院，北京 100083)
摘 要: 為研究殘采激勵(lì)下復(fù)雜組合水平采空區(qū)群的動(dòng)力響應(yīng)，借助離散化方法，構(gòu)建復(fù)雜水平采空區(qū)群動(dòng)力響應(yīng)模型。結(jié)合數(shù)值模擬，對(duì)某大型地下金礦山KT8礦體1100 m中段復(fù)雜水平采空區(qū)群進(jìn)行動(dòng)力響應(yīng)及應(yīng)力傳遞研究。結(jié)果表明：爆破激勵(lì)下，水平采空區(qū)群結(jié)構(gòu)的改變幾乎不會(huì)對(duì)其作用巖體本身的位移響應(yīng)和速度響應(yīng)產(chǎn)生影響，但對(duì)其余部分巖體響應(yīng)產(chǎn)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(jié)構(gòu)改變處巖體；爆破荷載對(duì)其作用巖體應(yīng)力分布產(chǎn)生較明顯的變化，對(duì)其余部分巖體不會(huì)產(chǎn)生明顯的影響。現(xiàn)場(chǎng)工程結(jié)果表明，復(fù)雜水平采空區(qū)群間柱經(jīng)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(méi)有發(fā)生大的位移變形，并驗(yàn)證動(dòng)力響應(yīng)模型分析的可靠性，該方法為復(fù)雜采空區(qū)群殘采作業(yè)提供理論指導(dǎo)。
關(guān)鍵字: 采空區(qū)群；動(dòng)力響應(yīng)模型；應(yīng)力傳遞；結(jié)構(gòu)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
