【摘要】：為研究紅嶺鉛鋅礦大規(guī)�；夭蛇^程中圍巖頂板的破壞模式及區(qū)域,分析承壓礦柱以及圍巖的應力演化規(guī)律,明確空區(qū)群的力學狀態(tài)以及穩(wěn)定性。建立大尺度復雜空區(qū)群三維力學計算模型,應用大規(guī)模并行計算技術(shù),對中段回采中圍巖礦柱破壞模式及應力演化規(guī)律進行了研究。結(jié)果表明:頂板在不同礦體厚度區(qū)域,會產(chǎn)生""型剪切破壞、發(fā)散型破壞、X狀共軛剪切破壞以及單斜面剪切破壞等不同破壞形式;回采后產(chǎn)生9個主要承壓礦柱、4個次要承壓礦柱;中段回采,會對上一中段產(chǎn)生明顯應力擾動,原有破壞擴展,并產(chǎn)生新的破壞,但隔段回采,不會對最上中段產(chǎn)生應力影響。
[Abstract]:In order to study the failure mode and region of roof of surrounding rock during large-scale mining of Hongling lead-zinc mine, the stress evolution law of bearing pillar and surrounding rock is analyzed, and the mechanical state and stability of hollow area group are determined. A three-dimensional mechanical calculation model of large scale complex hollow zone group is established. The failure mode and stress evolution of surrounding rock pillar in the middle section of mining are studied by using large-scale parallel computing technology. The results show that different failure forms such as "type" shear failure, divergent type failure, X-shaped conjugate shear failure and single inclined plane shear failure will occur in different orebody thickness regions. After mining, 9 main bearing pillars and 4 secondary bearing pillars will be produced, and the middle section will produce obvious stress disturbance, original damage spread and new damage, but the interval recovery will not produce stress effect on the upper middle section.
【作者單位】： 東北大學深部金屬礦山安全開采教育部重點實驗室;東北大學資源與土木工程學院;北京礦冶研究總院礦山工程研究所;
【基金】：國家自然科學基金項目(51574060,51404067,51574059)
【分類號】：TD325.3

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