本文關(guān)鍵詞： 開挖 斷層活化 突水 數(shù)值模擬 中關(guān)鐵礦　出處：《東北大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年11期 　論文類型：期刊論文

【摘要】：以中關(guān)鐵礦采動(dòng)斷層突水為例,對(duì)連續(xù)開挖過(guò)程斷層活化頂板突水進(jìn)行有限元模擬,從力學(xué)角度研究斷層帶應(yīng)力和損傷區(qū)遷移過(guò)程,分析斷層活化機(jī)制.研究表明:連續(xù)開挖是造成斷層損傷區(qū)產(chǎn)生、累積擴(kuò)展到貫通的主要誘因;隨著開挖推進(jìn)斷層帶內(nèi)剪應(yīng)力集中區(qū)域沿?cái)鄬訌纳系较轮饾u向頂板轉(zhuǎn)移,斷層損傷區(qū)狀態(tài)由壓剪變?yōu)槔?并不斷擴(kuò)展;損傷區(qū)在斷層揭露時(shí)完全貫通,形成導(dǎo)水通道并誘發(fā)突水災(zāi)害.因此,對(duì)于工作面前方的非導(dǎo)水?dāng)鄬?采用水平超前鉆孔未必能查明斷層活化導(dǎo)水情況,為確保安全,需補(bǔ)充斜向上鉆孔,探查更高位置斷層的導(dǎo)水性.
[Abstract]:Taking the water inrush of the mining fault in Zhongguan Iron Mine as an example, the finite element simulation of water inrush from the active roof of the fault during continuous excavation is carried out, and the stress and the migration process of the damage zone in the fault zone are studied from the mechanical point of view. The mechanism of fault activation is analyzed. It is shown that continuous excavation is the main inducement of fault damage zone, and the shear stress concentration area in the fault zone moves gradually from top to bottom along the fault with excavation. The state of damage zone of fault is changed from compression shear to tension shear, and the damage area is expanded continuously. When the fault is exposed, the damage area is completely through, forming a water diversion passage and inducing water inrush disaster. Therefore, for the non-hydraulic fault in front of the face, The horizontal advance drilling may not be used to find out the fault active water conductivity. In order to ensure the safety, it is necessary to supplement the inclined upward drilling to explore the water conductivity of the fault in higher position.
【作者單位】： 東北大學(xué)資源與土木工程學(xué)院;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(2013CB227902) 國(guó)家自然科學(xué)基金資助項(xiàng)目(51574059,51404067)
【分類號(hào)】：TD745.2

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