半成岩抗拉试验的效果评价

Effect Evaluation of Tensile Test for Hypabyssal Rock

半成岩作为一种特殊岩土体,越来越频繁出现在工程建设中,而受拉破坏是岩土体常见的破坏形式,其抗拉强度作为岩土体的基本参数之一,也越来越被工程技术人员重视。该文基于对内蒙古努和廷铀矿的泥岩和粉细砂岩两种半成岩进行的抗拉强度试验,分析了半成岩抗拉强度随深度及时间的变化规律以及岩样发生拉伸破坏后的特征;对抗拉强度与抗压强度和黏聚力关系进行了论述,探讨了如何正确、合理的选择半成岩抗拉强度,得出了本地区半成岩的抗拉强度参考值。

As a special kind of rock and soil mass,the hypabyssal rock appears more and more frequently in engineering construction.And the tensile failure is a common failure form of rock and soil mass.As one of the basic parameters of rock and soil mass,its tensile strength is paid more and more attention by engineering technicians.Based on the tensile strength tests of two hypabyssal rock,such as mudstone and siltstone in Nuheting Uranium Mine,Inner Mongolia,this paper analyzes the variation law of tensile strength with depth and time,and the characteristics of rock samples after tensile failure;The relationships between the tensile strength,compressive strength and cohesion are discusses.This paper discusses how to select the tensile strength of hypabyssal rock correctly and reasonably,and obtains the reference value of the tensile strength of hypabyssal rock in this area.