本文關(guān)鍵詞： 砂巖 泥質(zhì)含量 三軸 滲透 模型　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】：為探討三向應(yīng)力狀態(tài)下不同泥質(zhì)膠結(jié)物含量砂巖滲透力學(xué)性能的異同,對(duì)泥質(zhì)含量分別為4%、15%、24%、31%的4組不同泥質(zhì)含量砂巖進(jìn)行了三軸壓縮滲透試驗(yàn)。試驗(yàn)結(jié)果表明:砂巖的強(qiáng)度和彈性模量隨著泥質(zhì)膠結(jié)物的增加呈冪函數(shù)型減小,隨圍壓的升高而增大,內(nèi)摩擦角和黏聚力隨含泥量增加而逐漸減小;相同圍壓和泥質(zhì)含量下,滲透性隨加載應(yīng)力的增大呈先減小后增大、再略微減小的整體趨勢(shì),滲透系數(shù)在峰值應(yīng)力附近達(dá)到最大值;相同圍壓和偏應(yīng)力下,滲透系數(shù)隨泥質(zhì)膠結(jié)物含量的升高而呈線性減小;同等泥質(zhì)含量和偏應(yīng)力下,砂巖的滲透性隨圍壓的升高呈對(duì)數(shù)型函數(shù)減小。基于試驗(yàn)結(jié)果,分析得到了一種綜合考慮圍壓、孔隙度以及泥質(zhì)含量影響的砂巖綜合滲透模型,并通過(guò)理論與試驗(yàn)數(shù)據(jù)對(duì)比分析驗(yàn)證了模型的合理性。
[Abstract]:In order to study the similarities and differences of permeability mechanical properties of sandstone with different muddy cementation content under three direction stress state, the content of clay is 4 15% or 24% respectively. Four groups of sandstone with different shaly content in 31% were tested under triaxial compression. The results show that the strength and elastic modulus of sandstone decrease with the increase of shale cement. With the increase of confining pressure, the internal friction angle and cohesion force decrease with the increase of mud content. Under the same confining pressure and mud content, the permeability decreases first and then increases with the increase of loading stress, and then decreases slightly. The permeability coefficient reaches the maximum near the peak stress. Under the same confining pressure and deflection stress, the permeability coefficient decreases linearly with the increase of the content of clay cement. Under the same shaly content and deviation stress, the permeability of sandstone decreases with the increase of confining pressure in logarithmic form. Based on the test results, a comprehensive consideration of confining pressure is obtained. The comprehensive permeability model of sandstone affected by porosity and shaly content is verified by comparison of theoretical and experimental data.
【作者單位】： 重慶水利電力職業(yè)技術(shù)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目資助(51378521) 重慶市科委重點(diǎn)基金項(xiàng)目資助(CSTC2013JJB0005)
【分類號(hào)】：TU45
【正文快照】： 砂巖是現(xiàn)代水利、交通、礦井、油氣探井等工程中最為常見(jiàn)的一種巖石之一,而滲透特性對(duì)工程的安全和穩(wěn)定具有重要影響,因此砂巖的滲透性能歷來(lái)受到眾多專家學(xué)者的關(guān)注和研究。張守良等[1]、郭琴等[2]研究了砂巖、泥巖等變形破壞過(guò)程中滲透率隨荷載的變化規(guī)律,并對(duì)其影響因素進(jìn)

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 宋子齊,林梁;用霍其士—萊赫曼法確定地層泥質(zhì)含量[J];地球物理測(cè)井;1990年05期

2 徐延勇;薛乾坤;;泥質(zhì)含量求取方法綜述[J];煤礦安全;2014年08期

3 D.Eberhart-Phillips;王正昌;;在砂巖中地震速度、有效壓力、孔隙率和泥質(zhì)含量之間的經(jīng)驗(yàn)關(guān)系[J];石油物探譯叢;1989年06期

4 史，

本文編號(hào)：1484009