弱崩解性软岩干-湿循环条件下崩解特性试验研究

doi:10.16265/j.cnki.issn1003-3033.2017.08.016

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (8): 91-96.doi: 10.16265/j.cnki.issn1003-3033.2017.08.016

弱崩解性软岩干-湿循环条件下崩解特性试验研究

梁冰教授, 曹强, 王俊光, 姜利国

辽宁工程技术大学力学与工程学院,辽宁阜新 123000

收稿日期:2017-04-11 修回日期:2017-06-20 出版日期:2017-08-20 发布日期:2020-10-13
作者简介:梁冰(1962—),女,辽宁盘锦人,博士,教授,博士生导师,主要从事岩石力学和渗流力学等方面的教学和科研工作。E-mail:lbwqx@163.com。
基金资助:
国家自然科学基金资助(51404130,51374124)。

Experimental study on slaking characteristics of feeble disintegration soft rock in drying-wetting cycle

LIANG Bing, CAO Qiang, WANG Junguang, JIANG Liguo

School of Mechanics and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China

Received:2017-04-11 Revised:2017-06-20 Online:2017-08-20 Published:2020-10-13

摘要/Abstract

摘要： 为填补岩石崩解特性研究中有关弱崩解性软岩崩解特性的研究空缺,从而为解决相关工程问题提供更全面的理论依据,以阜新市海州露天矿粗砾砂岩、泥岩等4种弱崩解性软岩为研究对象,进行干-湿循环崩解试验,结合试样的电镜照片、矿物成分、物理指标研究崩解作用下4种软岩的形态、静态崩解指数以及崩解比的变化规律。结果表明:弱崩解性软岩的崩解性与其矿物成分、结构特征以及物理性质密切相关;依据崩解指数判断弱崩解性软岩的崩解性不够准确,利用崩解过程中软岩整体级配的变化规律(崩解比)来判断其崩解性更精确;弱崩解性软岩内部裂隙和微裂隙表面对水的吸附作用产生的楔裂压力以及亲水性黏土矿物与水反应产生的膨胀应力,二者共同作用引起软岩发生崩解破坏。

关键词: 软岩, 弱崩解性, 干-湿循环, 矿物成分, 物理指标, 崩解指数, 崩解比

Abstract: In order to fill the gap of slaking characteristics research of feeble disintegration soft rock in the slaking characteristics of rock, so as to provide more comprehensive theoretical basis for solving related engineering problems, drying-wetting cycles tests of slaking were carried out on four kinds of rock regarding four kinds of soft rock including coarse sandstone, mudstone etc in Fuxin Haizhou open pit mine. According to the electron microscope photograph, mineral composition and physical parameters of the samples, the change law of the morphology, static disintegration index and the disintegration ratio of the four kinds of soft rock under slaking were researched. The results are drawn as follows. The slaking durability of feeble disintegration soft rock is closely related to their mineral composition, structure characteristics and physical property. The disintegration index is not accurate enough to be used to judge the slaking characteristics of feeble disintegration soft rock. It is more accurate to judge slaking characteristics by disintegration ratio. Adsorption of water by the face of internal crack causes the microfissure to generate the wedge pressure. Interaction between hydrophilic clay minerals and water generates the swelling stress. The slaking of feeble disintegration soft rock is caused by both the wedge pressure and the swelling stress.

Key words: soft rock, feeble disintegration, drying-wetting cycle, mineral composition, physical index, disintegration index, disintegration ratio

中图分类号:

X936

梁冰, 曹强, 王俊光, 姜利国. 弱崩解性软岩干-湿循环条件下崩解特性试验研究[J]. 中国安全科学学报, 2017, 27(8): 91-96.

LIANG Bing, CAO Qiang, WANG Junguang, JIANG Liguo. Experimental study on slaking characteristics of feeble disintegration soft rock in drying-wetting cycle[J]. China Safety Science Journal, 2017, 27(8): 91-96.

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弱崩解性软岩干-湿循环条件下崩解特性试验研究

Experimental study on slaking characteristics of feeble disintegration soft rock in drying-wetting cycle

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