|本期目录/Table of Contents|

[1]陈善乐,汪华君,崔铁军.近距离煤层大断面切眼支护稳定周期分析[J].中国安全生产科学技术,2014,10(8):28-33.[doi:10.11731/j.issn.1673-193x.2014.08.005]
　CHEN Shan-le,WANG Hua-jun,CUI Tie-jun.Stable period analysis of large section open-off cut support in close coal seam[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(8):28-33.[doi:10.11731/j.issn.1673-193x.2014.08.005]
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近距离煤层大断面切眼支护稳定周期分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
10
期数:
2014年8期
页码:
28-33
栏目:
学术论著
出版日期:
2014-08-31

文章信息/Info

Title:
Stable period analysis of large section open-off cut support in close coal seam
作者:
陈善乐1; 2; 汪华君2; 崔铁军1; 3
（1. 辽宁工程技术大学 安全科学与工程学院， 辽宁 阜新 123000; 2. 毕节学院 资源与安全工程学院， 贵州 毕节 551700；3. 大连交通大学 辽宁省隧道与地下结构工程技术研究中心, 辽宁 大连 116028）
Author(s):
CHEN Shan-le1; 2;  WANG Hua-jun2;  CUI Tie-jun1; 3
（1. College of Safety Science and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China; 2. College of Resources and safety engineering, Bijie University, Bijie Guizhou 551700, China; 3. Tunnel & Underground Structure Engineering Center of Liaoning, Dalian Jiaotong University, Dalian Liaoning 116028, China）
关键词:
近距离煤层; 开切眼; 稳定周期
Keywords:
close coal seam;  openoff cut;  stable period
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2014.08.005
文献标志码:
A
摘要:
在近距离煤层群的下行开采中，上位煤层的回采直接影响到下位煤层开切眼围岩的应力分布、破坏规律以及围岩的运移规律，从而影响到切眼的支护方式。为了分析下位煤层工作面切眼锚杆支护的稳定周期，利用基于三维显式有限差分法的计算工具Flac3D，以矿井近距离煤层工作面10603的切眼支护为工程实例，对比分析了上位煤层开采后，切眼围岩在支护前和支护后的应力分布、破坏规律和运移规律。结果表明，切眼进行锚杆支护后，应力集中带及影响范围都减少了50%，围岩剪应力由支护前的2.5 MPa降低到支护后的0.6 MPa，围岩塑性区域比支护前减少了40%，有效地控制了围岩的破坏，且切眼顶底板稳定周期为26天，两帮稳定周期为28~30天
Abstract:
In the downward mining of close distance coal seam group, the mining of upper coal seam directly affects the stress distribution, damage law and migration law of surrounding rock in lower coal seam, thereby affecting the support pattern of openoff cut. In order to analysis the stable period of openoff cut support in lower coal seam with anchor bolt support, by using the computing tools Flac3D, which was based on three dimensional explicit finite difference method, and taking the 10603 working face in close coal seam as example, the stress distribution, damage law and migration law of openoff cut under support or not, with the upper coal seam has been mined, were comparatively analyzed. The results showed that after the openoff cut has been supported with anchor bolt, the stress concentration belt and its influence scope of surrounding rock are decreased by 50%, the shear stress of surrounding rock has down to 0.6 MPa from 2.5 MPa, the plastic area of surrounding rock reduces by more than 40%, the stable period of roof and floor is 26 days, and the stable period of sides is 28~30 days.

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　CHEN Shan-le,WANG Kun,WANG Hua-jun,et al.Analysis on determination of alternate distance for open-off cut in downward mining of close distance coal seam group[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2015,11(8):144.[doi:10.11731/j.issn.1673-193x.2015.12.023]
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备注/Memo

备注/Memo:
贵州省基金计划项目(LKB［2012］03)
更新日期/Last Update: 2014-09-26