Estimation of pillar strength and effect of inclination under gently inclined layered deposits based on Mohr-Coulomb criterion

LUO Bin-yu; YE Yi-cheng; CAO Zhong; WANG Qi-hu; LI Yu-fei; CHEN Hu

doi:10.16285/j.rsm.2017.2504

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Estimation of pillar strength and effect of inclination under gently inclined layered deposits based on Mohr-Coulomb criterion

更新时间：2026-06-25

- Estimation of pillar strength and effect of inclination under gently inclined layered deposits based on Mohr-Coulomb criterion
- Vol. 40, Issue 5, Pages: 1940-1946(2019)
- 作者机构：
  
  1. 武汉科技大学资源与环境工程学院
  2. 武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室
  3. 中国长江三峡集团公司三峡枢纽建设运行管理局
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.2504
  CLC： TD31
- Published：2019
- 稿件说明：
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[1]罗斌玉,叶义成,曹中,王其虎,李玉飞,陈虎.基于Mohr-Coulomb准则的缓倾斜层状矿床矿柱强度估算及倾角效应[J].岩土力学,2019,40(05):1940-1946+1956.

LUO Bin-yu, YE Yi-cheng, CAO Zhong, et al. Estimation of pillar strength and effect of inclination under gently inclined layered deposits based on Mohr-Coulomb criterion[J]. 2019, 40(5): 1940-1946.
[1]罗斌玉,叶义成,曹中,王其虎,李玉飞,陈虎.基于Mohr-Coulomb准则的缓倾斜层状矿床矿柱强度估算及倾角效应[J].岩土力学,2019,40(05):1940-1946+1956. DOI： 10.16285/j.rsm.2017.2504.

LUO Bin-yu, YE Yi-cheng, CAO Zhong, et al. Estimation of pillar strength and effect of inclination under gently inclined layered deposits based on Mohr-Coulomb criterion[J]. 2019, 40(5): 1940-1946. DOI： 10.16285/j.rsm.2017.2504.

摘要

矿柱强度是评估矿柱稳定性的重要因素之一

矿柱的稳定是地下矿床安全开采的基础。以弹性力学理论为基础

分析了缓倾斜层状矿床中矿柱的受力状态

应用图解法绘制出表征矿柱应力状态的广义莫尔圆。根据应力圆与Mohr-Coulomb强度包络线之间的关系

建立了矿柱强度解析式

分析了莫尔圆圆心所在直线斜率tan

随矿体倾角的变化特性

并结合数值模拟

研究矿体倾角效应对矿柱强度的影响。研究表明:应力圆圆心所在直线斜率tan

是矿体倾角θ及侧压系数λ的二元函数

当tan

取得最大值时

矿柱强度最小;当矿柱宽高比w

保持一定且矿体倾角在5°～45°区间时

随着矿体倾角增大

矿柱强度逐渐减小。研究可为缓倾斜层状矿床矿柱强度估算提供参考。

Abstract

Pillar strength is one of the important factors for evaluating the pillar stability

which is the basis for safe mining for underground deposits. In this paper

the stress state of pillars in gently inclined layered deposits was analyzed under the combined action of normal stress and shear stress using the theory of elastic mechanics

and a generalized Mohr’s circle was plotted by graphic method to characterize the stress state of the pillars. According to the relationship between the generalized stress circle and the Mohr-Coulomb strength envelope

an analytic formula for the pillar str

ength was developed to analyze the variation of the slope of straight line（ tan

） at the center of Mohr circle with the dip angle of ore body. The influence of the ore-body inclination on the pillar strength was also analyzed by numerical simulation. Result shows that tan

is a binary function of the deposit angle θ and the lateral pressure coefficient λ. When the maximum value of tan

is obtained

the strength of the pillar is the smallest. When the w

of the pillar keeps a same value and the ore body dip angle is within 5°～45°

the strength of the pillar gradually decreases with the increase of the dip of the ore body. The study can provide a reference for the estimation of the strength of the pillars in gently inclined bedded deposits.

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Related Institution

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