本文選題：巖石力學　切入點：柱狀節(jié)理　出處：《巖石力學與工程學報》2017年01期

【摘要】：為了研究柱狀節(jié)理巖體在多次圍壓循環(huán)加卸載下滲透率與孔隙度的演化規(guī)律,利用致密巖石惰性氣體滲透測試裝置,對柱狀節(jié)理巖體相似材料進行3次圍壓循環(huán)加卸載模型試驗,測量柱狀節(jié)理巖體相似材料在3次圍壓循環(huán)加卸載下滲透率與孔隙度的變化過程,研究滲透率、孔隙度與圍壓之間的變化關系以及對應力的敏感性。試驗結(jié)果表明:在第一次圍壓加載階段,柱狀節(jié)理材料滲透率和孔隙度變化較大,且圍壓卸載后不能恢復初始狀態(tài),在此后的圍壓循環(huán)加卸載階段,圍壓變化對柱狀節(jié)理巖體滲透率和孔隙度的影響較小;加載階段,滲透率和孔隙度與圍壓均成冪函數(shù)關系;卸載階段,滲透率與圍壓成冪函數(shù)關系,孔隙度與圍壓成指數(shù)函數(shù)關系;隨圍壓增大,滲透率和孔隙度對圍壓變化的敏感性均減少,圍壓卸載后,滲透率和孔隙度對圍壓變化的敏感性可以恢復;在每個圍壓循環(huán)加卸載階段,滲透率對圍壓變化的敏感性與柱體傾角的關系曲線均呈雙峰形,且第一個峰值總是大于第二個峰值;圍壓加載階段孔隙度與滲透率成冪函數(shù)關系,圍壓卸載階段孔隙度與滲透率成指數(shù)函數(shù)關系;柱狀節(jié)理材料的孔隙度越大,滲透率對孔隙度變化的敏感性越強;柱狀節(jié)理材料滲透率對孔隙度變化的敏感性與柱體傾角的關系曲線呈雙峰形,且第一個峰值大于第二個峰值。
[Abstract]:In order to study the columnar jointed rock mass in pressure evolution of porosity and permeability under cyclic loading and unloading times around, penetration testing device using inert gas in dense rock, columnar jointed rock similar material pressure cyclic loading model test 3 Wai, measuring the columnar jointed rock body of similar material in the process of pressure, change of permeability and porosity the cyclic loading and unloading 3 times around the study of changes in the relationship between the sensitivity of permeability, porosity and confining pressure and stress. Test results show that: in the loading stage for the first time around, the columnar jointed material porosity and permeability changes greatly, and around cannot restore the initial state pressure after unloading confining pressure in the cyclic loading and unloading stage since then, little influence of confining pressure change of columnar jointed rock mass permeability and porosity; loading stage, the porosity and permeability and confining pressure have power function relationship; unloading stage, infiltration The rate of penetration and confining pressure into power function relation, porosity and confining pressure exponent; with the increasing of confining pressure, the sensitivity of permeability and porosity for confining pressure changes were reduced, unloading confining pressure, permeability and porosity on the sensitivity of confining pressure change can be restored; in each cycle of loading and unloading confining pressure stage, relationship curve of permeability on confining pressure change sensitivity and column angle showed a Shuangfeng shape, and the first peak is higher than the second peak; the confining pressure stage of a power function relationship between permeability and porosity, confining pressure unloading stage porosity exponent and permeability; columnar jointed material porosity greater sensitivity to permeability the change of porosity is stronger; curve of columnar jointed material permeability on porosity variation sensitivity and column angle of Shuangfeng, and the first peak is higher than the second peak.

【作者單位】： 河海大學港口海岸與近海工程學院;河海大學巖土工程科學研究所;
【基金】：國家自然科學基金資助項目(11272113,51479049,11572110)~~
【分類號】：TV223

【相似文獻】

相關期刊論文 前10條

1 崔波;許夢國;張?zhí)?李愛民;孫麗軍;宓鐵良;;恒溫狀態(tài)下孔隙度的相關研究[J];黃金;2006年01期

2 張樂;姚平喜;;振動條件下粒群孔隙度變化規(guī)律的仿真研究[J];建筑砌塊與砌塊建筑;2007年06期

3 孫朕;李玲玲;楊威;那云石;;利用孔隙度遺傳反演約束儲層地質(zhì)模型[J];科學技術與工程;2012年06期

4 許晶;黃操軍;孟艷君;;激光共聚焦技術在巖芯圖像分析中的應用[J];中國新技術新產(chǎn)品;2010年09期

5 馮恩民，王秀梅，楊朝, 常云岫，吳鐵生，張鳳蓮，周旭東，黃蓮芳;地史中的孔隙度場方程及回剝正演法[J];大連理工大學學報;1994年03期

6 龐世倜;;粉末冶金摩擦材料[J];工程機械;1966年04期

7 鄭`，

本文編號：1719398