鄂尔多斯深部富水砂岩冻结强度的试验研究

刘波; 刘念; 李东阳; 张功; 邓和浪; 王健; 汤世杰

鄂尔多斯深部富水砂岩冻结强度的试验研究

刘波^1,2,
刘念¹,
李东阳^1,2,
张功¹,
邓和浪¹,
王健¹,
汤世杰¹

1.
中国矿业大学(北京)力学与建筑工程学院,北京100083;2.深部岩土力学与地下工程国家重点实验室,北京100083

基金项目: 国家自然科学基金(51274209,41472259,U1261212);"十三五"国家重点研发计划重点专项(2016YFC0802505)

详细信息

作者简介:
刘波(1970—),男,湖南湘潭人,教授,博士生导师,主要从事矿山建设工程及城市地下工程的教学与研究。

中图分类号: TU443
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出版历程
- 收稿日期: 2016-06-20
- 刊出日期: 2017-02-15

Frozen strength test on deep water-rich sandstone in Ordos

1.
School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing100083,China;2.State Key Laboratory for GeoMechanics and Deep Underground Engineering,Beijing100083,China

摘要

摘要: 研究冻结条件下深部岩石的力学特征,对西部超深立井冻结壁厚度以及掘进段高的设计具有重要意义。本文以鄂尔多斯某立井冻结工程为背景,以深部富水地层中典型的中砂岩为研究对象,基于细观放大图像分析了岩石的粒径和孔洞分布特征。在-5℃、-10℃、-15℃条件下对冻结中砂岩进行了三轴压缩试验,并在26℃、-10℃和-20℃条件下进行了巴西劈裂试验。试验结果表明:冻结中砂岩的抗压强度随着温度的降低而线性增加,增加幅度最大为27.29%,但随着围压的增加,温度的影响有所减弱;冻结中砂岩内摩擦角φ和黏聚力c也随温度降低而增加,最大增加幅度分别为12.54%和18.69%;温度从26℃降至-10℃,中砂岩抗拉强度从0.73MPa增至1.59MPa,增加118.18%,但当温度继续降低,抗拉强度变化较小。中砂岩强度在冻结后随着温度的降低而增加,但增加幅度有限,此类地层中冻结壁厚度设计以满足封水效果为主,立井中心温度不必过低。
- 冻结砂岩 /
- 单轴压缩试验 /
- 三轴压缩试验 /
- 巴西劈裂试验 /
- 强度特征
Abstract: The rock mechanism under frozen condition has played down the significance on the design of frozen wall thickness and section height of the ultra-deep shaft in Western of China.This paper investigated the particle size and voids distribution principles using magnified image technique,which is on the typical medium size sandstone within the deep water-rich stratum during a coal mining construction with artificial freezing skill in Ordos of China.The frozen medium size sandstone have been studied with triaxial compression test under the temperature of -5℃,-10℃,-15℃,and Brazilian Split test at 26℃,-10℃ and -20℃.The test results indicated that the compressive strength improved linearly up to maximum of 27.29% when temperature dropped down,and this effect was weakened with the increase of the confining pressure.So did the internal frictional angle and cohesion,which ended up with the biggest rise of 12.54% and 18.69%.The tensile strength jumped from 0.73 MPa at 26℃ up to 1.59 MPa at -10℃,as of 118.18% extra,followed with declining when the temperature reduced more.The strength property of medium sandstones have been further improved with only certain extent during lowering the temperature,therefore the design criteria of frozen wall thickness should rather be governed by the purpose of sealing water than over cooling control.
- frozen sandstone /
- uniaxial compression test /
- triaxial compression test /
- Brazilian split test /
- strength property

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参考文献(39)

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鄂尔多斯深部富水砂岩冻结强度的试验研究

作者简介:
刘波(1970—),男,湖南湘潭人,教授,博士生导师,主要从事矿山建设工程及城市地下工程的教学与研究。

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Frozen strength test on deep water-rich sandstone in Ordos

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留言板

鄂尔多斯深部富水砂岩冻结强度的试验研究

作者简介: 刘波(1970—),男,湖南湘潭人,教授,博士生导师,主要从事矿山建设工程及城市地下工程的教学与研究。

计量

出版历程

Frozen strength test on deep water-rich sandstone in Ordos

计量

出版历程

目录

作者简介:
刘波(1970—),男,湖南湘潭人,教授,博士生导师,主要从事矿山建设工程及城市地下工程的教学与研究。