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地层应力

地层应力的相关文献在1989年到2022年内共计114篇,主要集中在石油、天然气工业、公路运输、地质学 等领域,其中期刊论文81篇、会议论文8篇、专利文献60637篇;相关期刊51种,包括地球物理学报、石油天然气学报、测井技术等; 相关会议8种,包括中国地质学会2015年学术年会、第十八届全国探矿工程(岩土钻掘工程)技术学术交流会、2014年中国地球科学联合学术年会等;地层应力的相关文献由335位作者贡献,包括姚铁军、李少华、伍向阳等。

地层应力—发文量

期刊论文>

论文:81 占比:0.13%

会议论文>

论文:8 占比:0.01%

专利文献>

论文:60637 占比:99.85%

总计:60726篇

地层应力—发文趋势图

地层应力

-研究学者

  • 姚铁军
  • 李少华
  • 伍向阳
  • 何传亮
  • 何卫
  • 倪小明
  • 傅金阳
  • 刘富强
  • 刘拯安
  • 刘源
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 胡东风; 任岚; 李真祥; 赵金洲; 林然; 蒋廷学
    • 摘要: 深层超深层页岩气井压裂时,受深部地层应力非均质性和“密簇”布缝的联合影响,多簇压裂中的水力裂缝难以同步起裂扩展,同时缝间强干扰作用加剧了裂缝非均衡延伸程度,矿场实践证实缝口暂堵压裂工艺可以有效调控多簇裂缝非均衡延伸,而构建深层超深层页岩气水平井缝口暂堵压裂裂缝调控模拟方法,可提高暂堵工艺实施效果。为此,基于岩石力学、弹性力学、流体力学和裂缝扩展理论、水平井分簇压裂中流量分配方程和暂堵球封堵方程,建立了深层超深层页岩气缝口暂堵压裂的裂缝扩展模型及调控模拟方法,并以中石化川东南丁山—东溪构造深层页岩气井为例,模拟了暂堵压裂中暂堵球数量、暂堵次数和时机对暂堵调控的影响,分析了暂堵球对裂缝扩展形态和SRV展布影响。研究结果表明:①缝口暂堵可以显著促进多簇裂缝均衡延伸,模拟证实暂堵球数量、暂堵次数和暂堵时机对裂缝调控具有重要作用;②随暂堵球数量增多,缝网体积先增大后减小,存在最优暂堵球数量;③当暂堵次数较多,可提高暂堵转向工艺容错率,但需要适量增多暂堵球数量;④当暂堵时机适当时,各簇裂缝均衡扩展,缝网体积达到最大值。结论认为,该暂堵裂缝调控模拟方法对完善暂堵压裂优化设计、提高矿场工艺实施水平,有效开发深层超深层页岩气具有重要意义。
    • 曹谦; 陈杰; 孙成才; 徐作涛; 范其明
    • 摘要: 黄土特殊的工程性质给大断面黄土隧道设计中围岩变形控制量与预留变形量值的确定带来了困难。本研究以大断面马蹄形黄土隧道为对象,采用FLAC;数值计算软件,建立三维数值模型,依据黄土物理与力学指标,研究了不同支护强度条件下黄土隧道围岩应力、变形变化规律以及拱顶监测变形极限值。结果表明:开挖扰动作用下黄土隧道地层应力由地面到拱顶距离先增大后减小,地层沉降位移随与地面距离增大而增大。隧道拱顶最大沉降随支护模量的减小先缓慢增长,随后迅速增长,不易控制。因此需要找到拱顶沉降加速增长的临界点,对应的极限值作为拱顶沉降的控制条件。由于隧道拱顶最终沉降由掌子面开挖前拱顶沉降和掌子面开挖后可检测出的拱顶监测沉降组成,可结合位移释放率得出监测沉降极限值,确定拱顶监测沉降控制条件。研究成果为黄土隧道围岩稳定性监测提供理论依据。
    • 王中举
    • 摘要: 为更好利用城市地下空间,修建地铁解决地表交通问题成为趋势,但在砂性地层中修建隧道易发生塌方事故.本文通过模型试验,对砂性地层中隧道开挖引起的地层变形、地表沉降及土体应力变化规律进行研究,分析了地层损失率、砂土粒径及隧道埋深对地表沉降及地层变形的影响.结果 表明:隧道开挖引起地层沉降曲线基本符合Peck曲线,验证了本试验的可行性.(1)随着地层深度增加,最大沉降值提高,沉降槽宽度减小;洞周0.75 D范围内土体应力变化明显.(2)地层损失率越大,地表沉降值及沉降槽宽度系数越大,且地层损失率到达一定值后,洞周1.0 D范围内地层沉降明显;(3)砂土粒径越小,地表沉降越大,沉降槽宽度系数越小,当砂土粒径比大于10倍时,地层变形扰动范围小;(4)隧道埋深越小,地表沉降越大,沉降槽宽度越小,且地层扰动范围也从拱腰处缩小至拱肩处.
    • 黄强兵; 马玉杰; 姜紫看; 陈星
    • 摘要: 以西安地裂缝典型地段为研究对象,建立基于实际地裂缝活动方式的地质力学模型,通过FLAC3D数值模拟,研究地裂缝活动作用下地层应力和位移传递规律.结果表明:地裂缝活动作用下,地表竖向沉降变形曲线近似呈反“S”形,表现出“牵引挠曲”现象,水平位移曲线出现明显波峰现象;随着地裂缝位错量的增大,地表竖向和水平位移均逐渐增大;基于地裂缝活动引起的地表变形平均倾斜值,确定了地裂缝带影响区范围为上盘21 m和下盘13 m.地裂缝活动引起两侧地层断距由深部到浅表部逐渐减小,具有明显的变形传递衰减特征,且地层断距随埋深的变化曲线可近似概化为一个四次多项式方程.地裂缝活动导致上盘地层出现应力降低区,下盘地层出现应力增强区,上盘应力降低区范围大于下盘应力增强区,且上、下盘应力变化范围随着位错量的增大均逐渐增大.地裂缝活动作用下地裂缝两侧地层应力影响区随地层埋深的增大而增大,其与埋深之间关系近似满足三次多项式方程.研究结果可为盆地断裂控制型地裂缝发育区的工程防灾减灾提供科学依据.%Based on the typical zones of ground fissures in Xi'an,the geological mechanics model of the actual activity mode of ground fissures is established.The transfer law of formation stress and displacement under the action of active ground fissures is studied with the FLAC3D numerical simulation method.The results show that under the action of active ground fissures,the curves of ground vertical displacement exhibit an approximate reverse-S shape,indicating the phenomenon of traction deflection.The curves of horizontal displacement appear the phenomenon of an obvious peak.The vertical and horizontal displacement gradually increases with the settlement of the hanging wall of the increasing ground fissure.Based on the average ground deformation tilt values induced by ground fissures,the affected zone range of ground fissure belts is determined,which is 21 m in the hanging wall and 13 m in the football from ground fissures,respectively.The fault throw on both sides of the formation induced by ground fissures gradually decreases with the depth from deep to shallow surface,which is characterized by the obvious deformation transfer and attenuation.The curves of fault throw of formation variation with the buried depth can approximately be expressed using a quartic polynomial equation.Under the action of active ground fissures,there appears a stress reduced area in the hanging wall,which is bigger than the stress enhanced area in the footwall.The stress variation range in the hanging wall and the football gradually increase with the increasing settlement of the hanging wall.The relationship between the affected zone of the formation stress on both sides of ground fissures,which gradually increases with the increasing buried depth,and the buried depth approximately satisfies a cubic polynomial equation.The results can present a scientific basis for disaster prevention of active ground fissure zones controlled by basin faults.
    • 傅鹤林; 张加兵; 黄震; 史越; 汪敬; 邢雪生
    • 摘要: 为揭示复合地层中浅埋盾构隧道开挖引起的地层位移及应力,文章基于Покровский当层法,将该问题等效为求解均质地层位移及应力分布问题,结合Loganathan修正公式,推导了复合地层中浅埋盾构隧道开挖引起的地层位移、应变和应力分量表达式,构建了地层位移场分布预测模型.同时基于理论预测模型,对比分析了工程实例的预测位移与实测数据的差别,讨论了上下层土体弹性模量比n、地层深度z和土体泊松比μ对隧道开挖的影响;在分析含软弱夹层隧道开挖问题时,提出了软弱夹层等效厚度K的概念.研究结果表明:随着n的增加,地表最大沉降值Smax、地表附加水平应力σx和竖向应力σz的最大值均有所减小;随着z的增加,地层最大沉降值有所增大;随着μ的增加,Smax有所减小,地表附加水平拉应力σx和竖向应力σz的最大值有所增加;当软弱夹层等效厚度K增加,Smax有所增加;隧道施工时,上硬下软地层产生位移及应力扩散现象,上软下硬地层产生位移及应力集中现象.%To reveal the distribution of ground displacement and stress caused by the excavation of a shallow-bur-ied shield tunnel in a compound stratum, the Покровскийequivalent layer method was applied to simplify the prob-lem into a solution for the displacement and stress distribution in a homogeneous formation. Using the modified Lo-ganathan′s formula, the expressions of ground displacement and strain component and stress component were de-duced, and a displacement field distribution prediction model was established. Based on a theoretical prediction model, the predicted and measured values were compared, and the effects of elasticity modulus ratio n of the upper and lower soil layers, the depth of tunnel z and the Poisson ratioμon tunnel excavation are also discussed. As for a tunnel excavation in a soft interbed stratum, the equivalent thickness K of the soft interbed stratum is introduced. The research results show that:1) with an increase of the n value, the maximum surface settlement Smax, maximum ad-ditional horizontal stressσx and vertical stressσz decrease;2) with an increase of the z value, the maximum settle-ment increases;3) with an increase of theμvalue, the Smax value decreases and the maximum additional horizontal stress and vertical stress increase;4) with an increase of the K value, the Smax value increases;and 5) during tunnel construction, displacement and stress diffusion occur in the stratum that is hard at the upper part and soft at the low-er part, while displacement and stress concentration occur in the stratum that is soft at the upper part and hard at the lower part.
    • 周顺林; 尹帅; 王凤琴; 李东; 易旺
    • 摘要: 随着地层埋深增加,岩石脆性降低,逐渐由硬脆性转变为韧性,而常规矿物组分法评价泥页岩脆性时没有考虑地层应力(埋深)的影响,因此评价结果存在一定误差.为此,从岩石脆性的最初定义出发,在不同围压条件下对陆相泥页岩岩样进行了力学测试,并利用应变法分析了泥页岩的脆性特征.结果表明:随着围压升高,泥页岩的弹性应变与塑性应变均增大,而脆性指数降低;泥页岩的弹性应变与塑性应变具有非常好的正相关性.对于文中所研究区块,埋深1 250.00,2 500.00和3 500.00 m处及埋深3 500.00~5 000.00 m和5 000.00~6 000.00 m范围内的泥页岩脆性指数分别约降低5.97%,8.55%,10.74%,14.00%和18.00%;当泥页岩储层中脆性矿物含量分别大于65%,60%,55%和小于50%时,其开发埋深下限分别为6 000.00,5 000.00和3 000.00 m以及基本不具备商业开发价值.研究结果表明,将应力(埋深)对泥页岩脆性的影响定量化,可以对采用矿物组分法计算的泥页岩脆性指数进行校正,为优选可压裂层段提供依据.%As well depth increases,formation rocks brittleness may be reduced and consequently manifest as ductile behavior.Conventional mineral composition can be used to assess the brittleness of shales.Because it does not take the impact of confining pressures (burial depths) into account,one arrives at less than satisfactory assessment conclusions.Under such circumstances,mechanical tests were conducted with continental deposit shale samples under different confining pressures and a strain method was deployed in a tested result analysis to highlight brittleness features of the shale.Research results showed that both elastic and plastic strains may increase with confining pressures while the brittleness index may decrease.Within the concerned Block,the brittleness index of shale at the depths of 1 250.00 m,2 500.00 m,3 500.00 m and between the interval of 3 500.00~5 000.00 m and 5 000.00~6 000.00 m fell approximately 5.97%,8.55%,10.74%,14.00% and 18.00%,respectively.With brittle minerals content in these shale reservoir formations over 65%,60%,55% and below 50%,the formation depth limitation for economic development of those reservoirs are determined to be 6 000.00 m,5 000.00 m,2 500.00 m and no commercial value,respectively.So the shale brittleness index determined from conventional mineral composition can be calibrated through quantification of impacts of stresses (burial depths) and it can provide help in the identification of intervals for staged hydraulic fracturing.
    • 李新伟; 郭建宁
    • 摘要: 为研究桥墩桩基础施工过程对地层的影响规律,以成都成温路改造桥梁工程为依托,采用三维有限元分析方法,对桥墩桩基础施工全过程进行模拟.研究桩基施工过程中地层应力状态的变化及桩周水平位移的变化,分别从应力角度和位移角度分析桩基施工对地层产生的影响,得出桩基施工对周围地层的影响范围.结果表明:桩基施工对周围地层的影响范围可近似为平面上以主道、匝道承台中心连线为轴线的跨度约为33.7m灯泡形区域,竖向深度在地面下13m以内.
    • 李新伟1; 郭建宁2
    • 摘要: 为研究桥墩桩基础施工过程对地层的影响规律,以成都成温路改造桥梁工程为依托,采用三维有限元分析方法,对桥墩桩基础施工全过程进行模拟。研究桩基施工过程中地层应力状态的变化及桩周水平位移的变化,分别从应力角度和位移角度分析桩基施工对地层产生的影响,得出桩基施工对周围地层的影响范围。结果表明:桩基施工对周围地层的影响范围可近似为平面上以主道、匝道承台中心连线为轴线的跨度约为33.7m灯泡形区域,竖向深度在地面下13m以内。
    • 李晓波
    • 摘要: 为了研究地层应力对掘进巷道稳定性的影响,通过掘进巷道应力场理论分析,提出巷道垂直应力与水平应力之间可以通过一个包含构造影响的综合侧压系数来联系,并通过ANSYS数值模拟软件,模拟巷道在不同的侧压系数下有效应力的分布情况,以及巷道各个关键点随侧压系数的变化趋势,结果表明:当侧压系数小于1,巷道的破坏主要是顶底板的移近;当侧压系数后等于1,巷道的破坏主要是断面积的整体变小;当侧压系数大于1,巷道的破坏主要是巷帮的移近,从而导致顶板冒落及底鼓.巷道各个关键点的有效应力随着侧压系数的增大有上升趋势.
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