不同顶底板强度下深部沿空留巷围岩变形特征

doi:10.11799/ce201605029

煤炭工程 ›› 2016, Vol. 48 ›› Issue (5): 91-93.doi: 10.11799/ce201605029

不同顶底板强度下深部沿空留巷围岩变形特征

李志华¹,华心祝²,李迎富³

1. 安徽理工大学能源学院
2. 安徽理工大学能源与安全学院
3. 安徽理工大学

收稿日期:2015-05-06 修回日期:2015-06-20 出版日期:2016-05-10 发布日期:2016-06-15
通讯作者: 李志华 E-mail:lizhihua128@126.com

Deformation Characteristics of Surrounding Rock of Gob-side Entry Retaining in Deep Mine at Different Strength of Roof and Floor

Received:2015-05-06 Revised:2015-06-20 Online:2016-05-10 Published:2016-06-15

摘要/Abstract

摘要： 以淮南顾桥煤矿1115(1)工作面地质条件为背景，利用FLAC5.02D数值模拟软件研究了顶底板强度对深部沿空留巷围岩变形特征的影响。结果表明：当巷道断面大小、形状及支护方式、强度确定时，沿空留巷围岩变形量均随着采深的增大而增大，但是不同顶底板强度下围岩变形量增大幅度不同，软弱岩层的变形量受采深影响更为敏感。随着采深的增大，软顶巷道顶板下沉量大于硬顶巷道，软底巷道底鼓量远大于硬底巷道，硬顶巷道墙体移近量大于软顶巷道，煤帮移近量受顶底板强度影响较小。并通过对两个深部矿井沿空留巷围岩变形进行现场实测，从而验证了该结论的正确性。

关键词: 沿空留巷, 深部矿井, 顶底板强度, 数值模拟, 底鼓

Abstract: The FLAC5.02D numerical simulation software was used to study the effect of roof and floor strength on deformation characteristics of surrounding rock of deep gob-side entry retaining according to the geological conditions of No. 1115(1) working face in Guqiao coal mine, the Huainan coal mining area. The results showed that the deformation of roadway surrounding rock increases with the increase of mining depth when kept unchanged in size and shape of the roadway cross-section, method and strength of support, while the increase range of surrounding rock deformation is various under different roof and floor strength, the surrounding rock deformation of soft rock is more sensitive to the depth. With the increase of mining depth, the roof convergence with soft roof roadway is greater than that with hard roof, the displacement of floor heave with soft floor roadway is greater than that with hard floor, the filled wall convergence with hard roof roadway is higher than that with soft roof, the roadway’s coal side convergence is similar at different roof and floor strength. This conclusion can be validated by site measurement the surrounding rock deformation of gob-side entry retaining in two deep mines.

中图分类号:

TD263.4

李志华，华心祝，李迎富. 不同顶底板强度下深部沿空留巷围岩变形特征[J]. 煤炭工程, 2016, 48(5): 91-93.

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不同顶底板强度下深部沿空留巷围岩变形特征

Deformation Characteristics of Surrounding Rock of Gob-side Entry Retaining in Deep Mine at Different Strength of Roof and Floor

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