Research on stability of strip coal pillar based on laboratory test

CHEN Shao-jie; GUO Wei-jia; YANG Yong-jie; WANG Ya-bo

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Research on stability of strip coal pillar based on laboratory test

更新时间：2026-06-25

- Research on stability of strip coal pillar based on laboratory test
- Vol. 29, Issue 10, (2008)
- 作者机构：
  
  山东科技大学矿山灾害预防控制省部共建教育部重点实验室,青岛,266510
- 作者简介：
- 基金信息：
- DOI：
  CLC： TD322+.4
- Online First：03 August 2013，
  
  Published：2008
- 稿件说明：
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CHEN Shao-jie, GUO Wei-jia, YANG Yong-jie, et al. Research on stability of strip coal pillar based on laboratory test[J]. 2008, 29(10).
DOI：

CHEN Shao-jie, GUO Wei-jia, YANG Yong-jie, et al. Research on stability of strip coal pillar based on laboratory test[J]. 2008, 29(10). DOI：

摘要

对建新矿13煤进行了室内力学性质研究，研究了煤岩的尺寸效应，得到了建新矿13煤煤岩体单轴抗压强度为 6.928 MPa；进行三轴压缩试验确定该层煤符合摩尔-库仑弹塑性力学模型。以试验研究结果为基础，结合建新矿的实际情况，在选定采出条带宽度25 m时，应用FLAC3D对条带开采进行煤柱应力和地表最大下沉分析，并研究煤柱稳定性。结果表明选择20 m宽度的煤柱时，可以保持煤柱稳定性。基于室内煤岩试验研究的结果，采用数值模拟的方法，通过多方案条带开采研究煤柱安全性，在减小煤柱尺寸的同时，确保煤柱安全稳定，避免仅仅使用经验公式计算带来的盲目性。

Abstract

Mechanical properties of Coal Seam No.13 in Jianxin Colliery are tested by using Rock Servo Mechanics Test System. The coal masses unaxial compressive strength is tested to be 6.928 MPa through size effect study. And the coal is testified to accord with Mohr-Coulomb elastoplastic model by triaxial compression test. Based on the experimental study

the pillar stress and maximum subsidence are studied by using FLAC3D; and the pillar security is analyzed after selecting the mining strip width of 25 m

then the stability of coal pillar is studied. The results indicate that the width of 20 m can maintain pillar stability. On the basis of coal test in laboratory with numerical simulation method

studying strip pillars’ stability of different widths can insure its stability and safety while reducing the size of pillar

then avoiding blindness by using empirical formula merely.

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