Research on rock bridge coalescence law of rock mass containing coplanar structural planes

GUO Mu-dan; ZHU Fu-sheng; WANG Shu-hong; ZHANG Shi-chao; ZHANG Jun

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Research on rock bridge coalescence law of rock mass containing coplanar structural planes

更新时间：2026-06-25

- Research on rock bridge coalescence law of rock mass containing coplanar structural planes
- Vol. 34, Issue 6, (2013)
- 作者机构：
  
  东北大学资源与土木工程学院,沈阳,110819
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU457
- Online First：14 June 2013，
  
  Published：2013
- 稿件说明：
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GUO Mu-dan, ZHU Fu-sheng, WANG Shu-hong, et al. Research on rock bridge coalescence law of rock mass containing coplanar structural planes[J]. 2013, 34(6).
DOI：

GUO Mu-dan, ZHU Fu-sheng, WANG Shu-hong, et al. Research on rock bridge coalescence law of rock mass containing coplanar structural planes[J]. 2013, 34(6). DOI：

摘要

块体理论是一种比较常用的岩土工程稳定性分析方法，但缺乏对非贯通结构面的研究，导致搜索出的关键块体不够精准和全面。如何处理非贯通结构面，判断其是否应该连通成为块体理论研究至关重要的一个问题。采用数值模拟的方法计算含两共面结构面岩体试样在不同岩桥倾角、结构面摩擦系数、围压和连通率情况下的贯通强度与峰值强度。引入贯通系数变量，定量描述贯通强度与峰值强度之间的关系。将贯通强度作为判断岩桥贯通与否的一个衡量指标，建立起贯通强度与岩桥倾角、结构面摩擦系数、围压和连通率之间的函数，即含两条共面结构面岩体的岩桥贯通准则。该准则可准确判断含两条共面结构面岩体的岩桥是否应该连通。基于岩桥贯通准则的块体理论能够准确搜索出因岩桥贯通而滑移的关键块体。

Abstract

Block theory is a commonly used method in stability analysis of geotechnical engineering

but there is no research on non-coalescence structural planes

which makes the key block searching neither accurate nor adequate. It is an essential issue for block theory studies that how to deal with the non-coalescence structural planes and whether they should be connected. Coalescence strength and peak strength of rock samples containing two coplanar structural planes in different rock bridge angles

frictional coefficient of structural planes

lateral press

and connectivity rate are calculated through numerical simulation method. Coalescence coefficient is introduced to quantitatively describe the relationship between coalescence strength and peak strength. The coalescence strength is a standard to estimate whether the rock bridge is coalescent or not. The function is established between coalescence strength and rock bridge angle

frictional coefficient of structural planes

lateral press

and connectivity rate

which is the rock bridge coalescence law of rock mass containing two coplanar structural planes. The law can accurately determine that whether the rock bridge should be connected for the rock mass containing two coplanar structural planes. Key blocks

which are slipped due to rock bridge coalescence

are searched by block theory based on rock bridge coalescence law.

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