【摘要】：采用Plaxis 3D數(shù)值模擬軟件,以應(yīng)力環(huán)境對(duì)巷道巖爆的影響問(wèn)題為切入點(diǎn),從位移云圖、應(yīng)力應(yīng)變曲線和塑性點(diǎn)分布等方面開(kāi)展不同應(yīng)力對(duì)巷道巖爆問(wèn)題的研究工作,為巷道巖爆預(yù)防及治理提供研究基礎(chǔ)。研究結(jié)果表明,巷道開(kāi)挖卸荷過(guò)程中,圓形巷道左右兩側(cè)同時(shí)出現(xiàn)了應(yīng)力集中和位移集中,此部位最易發(fā)生巖爆。開(kāi)挖過(guò)程中,根據(jù)周?chē)鷰r體距巷道側(cè)壁的厚度的關(guān)系,可將開(kāi)挖操作對(duì)周?chē)鷰r體的影響劃分為"開(kāi)始變大"、"明顯增大"、"急劇增加"三個(gè)區(qū)域。巷道的左右兩側(cè)壁會(huì)產(chǎn)生高應(yīng)力集中區(qū)和位移集中區(qū),最大應(yīng)力隨著水平應(yīng)力的增加呈線性增長(zhǎng),巷道發(fā)生位移集中區(qū)域的面積與水平應(yīng)力呈指數(shù)型正相關(guān)關(guān)系變化。位移集中區(qū)域中心與巷道側(cè)壁的距離是圓形巷道半徑的2/5,隨著應(yīng)力的增加,位移集中區(qū)域向周?chē)鷶U(kuò)張,巖爆的程度及影響范圍也隨之增大。
[Abstract]:With the help of Plaxis 3D numerical simulation software, with the effect of stress environment on rock burst of roadway as the breakthrough point, the research work of different stress on rock burst problem of roadway is carried out from the aspects of displacement cloud map, stress-strain curve and plastic point distribution, etc. It provides the research foundation for the prevention and control of rock burst in roadway. The results show that the stress concentration and displacement concentration occur simultaneously on the left and right sides of the circular roadway during the excavation and unloading process of the roadway and the rock burst is most likely to occur in this part. In the course of excavation, according to the relation between surrounding rock mass and side wall of roadway, the influence of excavation operation on surrounding rock mass can be divided into three regions: "start to get bigger", "obviously increase" and "increase sharply". High stress concentration zone and displacement concentration zone will be produced on the left and right sides of roadway. The maximum stress increases linearly with the increase of horizontal stress, and the area of displacement concentration area in roadway is positively correlated with horizontal stress. The distance between the center of the displacement concentration area and the side wall of the roadway is 2 / 5 of the radius of the circular roadway. With the increase of the stress, the concentrated area of displacement expands to the surrounding area, and the degree of rockburst and the influence range also increase.
【作者單位】： 華北理工大學(xué)礦業(yè)工程學(xué)院;華北理工大學(xué)河北省礦業(yè)開(kāi)發(fā)與安全重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目資助(編號(hào):51374088,51574102) 河北省高等學(xué)校科學(xué)技術(shù)研究項(xiàng)目資助(編號(hào):QN2016125;QN2016124) 華北理工大學(xué)科學(xué)研究基金資助(編號(hào):Z201501;Z201315)
【分類(lèi)號(hào)】：TD32

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