本文選題：正斷層 + 上下盤工作面　； 參考：《煤礦安全》2017年01期

【摘要】：以正斷層賦存條件下厚煤層開采為研究背景,采用FLAC3D數(shù)值模擬,研究了上、下盤工作面分別向正斷層推進(jìn)時(shí)支承應(yīng)力演化規(guī)律,揭示了工作面向正斷層開采的致災(zāi)規(guī)律。研究表明:斷層帶切割了頂?shù)装鍘r層的完整性,采動(dòng)應(yīng)力的阻隔效應(yīng)顯著,致使斷層煤柱易形成較高的應(yīng)力集中區(qū);下盤向正斷層推進(jìn)時(shí),存在支承應(yīng)力突增點(diǎn),使斷層煤柱發(fā)生塑性破壞,釋放大量彈性能;上盤向正斷層推進(jìn)時(shí),支承應(yīng)力平緩增加,且推進(jìn)過(guò)程中部分應(yīng)力能夠向下盤轉(zhuǎn)移,在下盤形成較小應(yīng)力集中區(qū),應(yīng)力曲線呈現(xiàn)一大一小"雙駝峰"狀。
[Abstract]:Based on the research background of thick coal seam mining under the condition of normal fault occurrence, FLAC3D numerical simulation is used to study the evolution law of supporting stress in upper and lower face respectively to normal fault, and to reveal the disaster causing law of working face normal fault mining.The study shows that the fault zone cuts the integrity of the top and bottom strata, and the barrier effect of mining stress is obvious, which leads to the formation of high stress concentration areas in the fault pillar, and the existence of supporting stress bulge when the footwall moves toward the normal fault.When the upper face pushes toward the normal fault, the support stress increases slowly, and some stresses can be transferred down to the lower side, forming a small stress concentration area in the lower side, which causes plastic failure of the coal pillar of the fault and releases a large amount of elastic energy.The stress curve shows a large and small "double hump" shape.
【作者單位】： 山東科技大學(xué)礦業(yè)與安全工程學(xué)院;山東科技大學(xué)礦山災(zāi)害預(yù)防控制省部共建國(guó)家重點(diǎn)實(shí)驗(yàn)室培育基地;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51574155) 泰安市科技發(fā)展計(jì)劃資助項(xiàng)目(2015ZC1058)
【分類號(hào)】：TD323

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