(1.北方交通大學(xué)土木建筑學(xué)院， 北京 100044;
2.北京有色冶金設(shè)計研究總院， 北京 100038)
摘 要: 采用巖石力學(xué)原理和方法， 通過現(xiàn)場初始地應(yīng)力實(shí)測、室內(nèi)巖石力學(xué)性質(zhì)試驗(yàn)和礦床開采全過程的三維有限元模擬，系統(tǒng)地分析了大團(tuán)山礦床開采過程中采空區(qū)頂?shù)装搴偷V柱的穩(wěn)定性。結(jié)果表明， 礦柱寬度小于27.5m 時，礦柱將會發(fā)生失穩(wěn)， 增加礦柱寬度對采空區(qū)頂?shù)装宸€(wěn)定性的影響并不明顯。 據(jù)此進(jìn)一步提出了一套合理的空區(qū)處理方法， 并被設(shè)計和生產(chǎn)所采納。
關(guān)鍵字: 采空區(qū) 支護(hù) 三維有限元 礦柱 加固
（1.Northern Jiaotong University, Beijing 100044, P. R. China;
2.Beijing Central Engineering and research Institute for Non-ferrous Metallurgical Industries, Beijing 100038, P. R. China）
Abstract:The stability of rock around mined caverns and safety pillar was analyzed with the measurement of in-situ stresses and laboratory tests of mechanical properties of rocks as well as 3D FEM simulation of the whole course of mining based on rock mechanics principle. It was clarified that vertical safety pillar would become unstable when its width is less than 27.5 m and enlarging the width of the pillar can not improve the stability of hanging wall and footwall significantly. A rational support method was proposed based on the simulation results. The conclusions have been adopted by mining design and production of the deposit.
Key words: mined cavern support 3D-finite element method pillar reinforcement
