本文關(guān)鍵詞： 深部巷道 非規(guī)則破裂 溫度 熱力學(xué)參數(shù) FLACD　出處：《水文地質(zhì)工程地質(zhì)》2017年01期 　論文類型：期刊論文

【摘要】：利用FLAC3D中應(yīng)變軟化模型和溫度模式建立數(shù)值計(jì)算模型,考慮初始地應(yīng)力中溫度熱應(yīng)力的修正并以函數(shù)的形式嵌入,討論了非規(guī)則破裂化現(xiàn)象中應(yīng)力及塑性區(qū)的特征。考慮地層溫度和巖體熱力學(xué)參數(shù)對(duì)深部圍巖非規(guī)則破裂化的影響,分析圍巖最大最小應(yīng)力及塑性區(qū)特征。數(shù)值分析表明:FLAC3D塑性區(qū)圖中呈現(xiàn)明顯的非規(guī)則破裂化現(xiàn)象,而且隨著地層溫度升高和線膨脹系數(shù)增大,深部圍巖非規(guī)則破裂化趨于嚴(yán)重;線膨脹系數(shù)大的圍巖受溫度影響較大。比熱容和導(dǎo)熱系數(shù)對(duì)深部圍巖非規(guī)則破裂化影響微弱。得到了震蕩的最大最小主應(yīng)力曲線,最大剪應(yīng)力與塑性區(qū)呈現(xiàn)出與最大剪應(yīng)力理論相似卻又不同的關(guān)系,即非規(guī)則破裂塑性區(qū)外邊界和最大剪應(yīng)力曲線的主峰值存在對(duì)應(yīng)關(guān)系,但最大剪應(yīng)力曲線主峰值相對(duì)于塑性區(qū)外邊界存在滯后性。
[Abstract]:Using the strain softening model and the temperature model in FLAC3D, the numerical model is established, and the correction of the thermal stress in the initial ground stress is considered and embedded in the form of function. The characteristics of stress and plastic zone in irregular fracture are discussed. The influence of formation temperature and thermodynamic parameters of rock mass on irregular fracture of deep surrounding rock is considered. The maximum and minimum stresses of surrounding rock and the characteristics of plastic zone are analyzed. The numerical analysis shows that there is obvious irregular rupture in the plastic zone diagram of W1 FLAC3D, and it increases with the increase of formation temperature and the coefficient of linear expansion. The irregular fracture of deep surrounding rock tends to be serious; The wall rock with large linear expansion coefficient is greatly affected by temperature, and the specific heat capacity and thermal conductivity have a weak effect on the irregular fracture of deep surrounding rock. The maximum and minimum principal stress curves of the oscillation are obtained. The relationship between the maximum shear stress and the plastic zone is similar to and different from that of the maximum shear stress theory, that is, there exists a corresponding relationship between the outer boundary of the irregular rupture plastic zone and the main peak value of the maximum shear stress curve. However, the main peak value of the maximum shear stress curve has hysteresis with respect to the outer boundary of the plastic zone.
【作者單位】： 湖南大學(xué)土木工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目資助(51378195,51578232) 湖南省交通科技項(xiàng)目資助(201224)
【分類號(hào)】：TU45
【正文快照】： 隨著礦產(chǎn)資源開挖深度逐漸增加,深部地下工程在社會(huì)發(fā)展過(guò)程中承擔(dān)著越來(lái)越重要的角色,而對(duì)深部地下工程所產(chǎn)生的不同于淺部地下工程的拉-壓區(qū)交替出現(xiàn)、間隔斷裂、非規(guī)則破裂化、分層斷裂等現(xiàn)象的研究就更顯重要。以有研究成果[1]表明,深部地下工程所出現(xiàn)的這些超�，F(xiàn)象與深

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