Research on disaster monitoring of overburden ground pressure and surface subsidence in extra-large mined-out area

HU Jing-yun; LI Shu-lin; LIN Feng; PENG Fu-hua; YANG Shun; YU Zheng-fang

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Research on disaster monitoring of overburden ground pressure and surface subsidence in extra-large mined-out area

更新时间：2026-06-25

- Research on disaster monitoring of overburden ground pressure and surface subsidence in extra-large mined-out area
- Vol. 35, Issue 4, (2014)
- 作者机构：
  
  1. 长沙矿山研究院有限责任公司,长沙,410012
  2. 玉溪大红山矿业有限公司,云南,玉溪,653100
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU457
- Online First：18 April 2014，
  
  Published：2014
- 稿件说明：
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HU Jing-yun, LI Shu-lin, LIN Feng, et al. Research on disaster monitoring of overburden ground pressure and surface subsidence in extra-large mined-out area[J]. 2014, 35(4).
DOI：

HU Jing-yun, LI Shu-lin, LIN Feng, et al. Research on disaster monitoring of overburden ground pressure and surface subsidence in extra-large mined-out area[J]. 2014, 35(4). DOI：

摘要

大红山铁矿采用无底柱分段崩落法开采形成了3个规模巨大的采空区，采空区上覆岩层移动与地表开裂塌陷将导致露天采场发生滚石地压灾害、井下采场产生空气冲击波次生地质灾害、地表与井下发生泥石流地质灾害等。针对上述问题，采取了多通道微震监测、非接触式岩移实时监测、基于手持式GPS仪的地表开裂范围监测和基于全站仪的地表沉降与水平移动监测的多种综合地压监测手段，对上覆岩层崩落高度、上覆岩层下沉变形量、地表开裂范围和地表沉降与水平移动等进行了监测，通过两年的监测获取了大量的监测数据，经分析表明，采空区上覆岩层崩落高度约在+1 090～+1 060 m，上覆岩层+1 090 m平巷内观测点累计沉降量为1 350 mm，地表开裂范围位于以岩移角为75°划定的地表岩移范围内，地表测点最大累计沉降与水平移动量为1 779与948 mm，上覆岩层与地表的变形移动活动处于稳定渐进可控的状态，目前不会发生上述地压地质灾害。

Abstract

Dahongshan iron mine which uses sublevel caving method without sill pillar has three extra-large mined-out area

the displacement of overburden and surface subsidence will lead to ground pressure and geological disasters

like rolling stones in open stope

air-blast wave in the underground stope

mud-rock flow in surface and underground

and so on. In order to monitor the natural caving height and displacement of overburden and subsidence range and displacement of surface

we use many means of monitoring methods

like multi-channel microseismic monitoring system

non-contact displacement monitoring system

handheld GPS device

total-station instrument. We obtained a lot of data after two years of monitoring; these data show that the natural caving height of overburden is between 1 090 m and 1 060 m elevation

the total settlement of observation point in +1 090 m tunnel is 1 350 mm

the subsidence range of surface is within the scope of the designed surface displacement based on traveling angle 75°

the maximal total vertical and horizontal displacement in surface is 1 779 mm and 948 mm

the deformation of overburden and surface is stable and controllable

there is no disaster occurred at present.

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