本文關鍵詞： 開挖 斷層活化 突水 數(shù)值模擬 中關鐵礦　出處：《東北大學學報(自然科學版)》2017年11期 　論文類型：期刊論文

【摘要】：以中關鐵礦采動斷層突水為例,對連續(xù)開挖過程斷層活化頂板突水進行有限元模擬,從力學角度研究斷層帶應力和損傷區(qū)遷移過程,分析斷層活化機制.研究表明:連續(xù)開挖是造成斷層損傷區(qū)產(chǎn)生、累積擴展到貫通的主要誘因;隨著開挖推進斷層帶內(nèi)剪應力集中區(qū)域沿斷層從上到下逐漸向頂板轉(zhuǎn)移,斷層損傷區(qū)狀態(tài)由壓剪變?yōu)槔?并不斷擴展;損傷區(qū)在斷層揭露時完全貫通,形成導水通道并誘發(fā)突水災害.因此,對于工作面前方的非導水斷層,采用水平超前鉆孔未必能查明斷層活化導水情況,為確保安全,需補充斜向上鉆孔,探查更高位置斷層的導水性.
[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】： 東北大學資源與土木工程學院;
【基金】：國家重點基礎研究發(fā)展計劃項目(2013CB227902) 國家自然科學基金資助項目(51574059,51404067)
【分類號】：TD745.2

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