急倾斜中厚矿体开采引发的岩体移动规律模拟实验
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TD853.36

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河北省自然科学(E2020209009);华北理工大学博士科研启动(28414099);华北理工大学教育教学改革研究与实践项目(碳中和专项)(T-L2246)


Experimental study on rock mass movement law caused by steeply inclined medium-thick ore body mining
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    摘要:

    急倾斜中厚矿体开采过程中,崩落区开采引起的周边岩体移动趋势对诱导冒落法使用起到至关重要的作用。以某铁矿诱导冒落法开采为工程背景,采用相似材料实验方法模拟了400m、600m、800m、1000m采深下,矿体及近矿上、下盘围岩受开采扰动的影响。研究表明:400-1000m采深条件下,矿体及近矿上、下盘围岩均呈现压密→滑移→压密的现象,且放矿对顶板矿岩受扰动的影响较大;矿体水平位移变化相较于近矿上、下盘围岩位移变化更剧烈,同时上盘围岩较下盘围岩对放矿的扰动更敏感;随采深的增加,矿体及近矿上、下盘围岩水平位移和垂直位移均出现由指向采空区转变为背离采空区的现象,且矿体总位移和应变波动范围均增大。

    Abstract:

    In the mining process of medium thick ore body with steep incline, the movement trend of surrounding rock mass caused by mining in the caving area plays an important role in the use of induced caving method. Taking the induced caving mining of an iron mine as the engineering background, the similar material experiment method was used to simulate the influence of mining disturbance on the ore body and surrounding rock of the upper and lower plates near the ore below the mining depth of 400 m, 600 m, 800 m and 1000 m. The research shows that under the condition of 400-1000 m mining depth, the ore body and surrounding rock of the upper and lower walls of the mine show the phenomenon of compaction → slip → compaction, and ore drawing has a great influence on the disturbance of roof rock. The horizontal displacement change of the ore body is more intense than that of the surrounding rock of the upper and lower walls near the mine, and the surrounding rock of the upper wall is more sensitive to the disturbance of ore drawing than the surrounding rock of the lower wall. With the increase of mining depth, the horizontal displacement and vertical displacement of the ore body and the surrounding rock of the upper and lower plates near the ore body change from pointing to the goaf to deviating from the goaf, and the total displacement and strain fluctuation range of the ore body increases..

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马姣阳,魏殿恩,张庆嵩,等. 急倾斜中厚矿体开采引发的岩体移动规律模拟实验[J]. 科学技术与工程, 2024, 24(18): 7599-7605.
Ma Jiaoyang, Wei Dianen, Zhang qingsong, et al. Experimental study on rock mass movement law caused by steeply inclined medium-thick ore body mining[J]. Science Technology and Engineering,2024,24(18):7599-7605.

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  • 收稿日期:2023-06-27
  • 最后修改日期:2024-04-01
  • 录用日期:2023-11-14
  • 在线发布日期: 2024-07-05
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