大倾角煤层回采巷道断面适应性

doi:10.12068/j.issn.1005-3026.2017.03.027

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (3): 436-441.DOI: 10.12068/j.issn.1005-3026.2017.03.027

大倾角煤层回采巷道断面适应性

曹树刚^1,2，王帅^1,2，王寿全³，杨红运^1,2

(1.重庆大学煤矿灾害动力学与控制国家重点实验室，重庆400044； 2.重庆大学资源及环境科学学院，重庆400044；3.四川省煤炭产业集团有限责任公司，四川成都610091)

收稿日期:2015-10-24 修回日期:2015-10-24 出版日期:2017-03-15 发布日期:2017-03-24
通讯作者: 曹树刚
作者简介:曹树刚(1955-)，男，重庆璧山人，重庆大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51474039，U1361205)；重庆大学煤矿灾害动力学与控制国家重点实验室自主课题(2011DA105287-ZD201302).

Adaptability of Roadway Section Shape in Deep Inclined Seam

CAO Shu-gang^1,2， WANG Shuai^1,2， WANG Shou-quan³， YANG Hong-yun^1,2

1.State Key Laboratory of Coal Mine Disaster Dynamics and Control， Chongqing University， Chongqing 400044， China; 2.School of Resource and Environmental Science， Chongqing University， Chongqing 400044， China; 3.Sichuan Coal Industry Group Limited Liability Company，Chengdu 610091， China.

Received:2015-10-24 Revised:2015-10-24 Online:2017-03-15 Published:2017-03-24
Contact: CAO Shu-gang
About author:-
Supported by:
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摘要/Abstract

摘要： 基于大倾角煤层回采巷道围岩应力显现规律，采用数值分析方法对不同类型断面巷道的围岩塑性区及应力非对称分布特征进行研究，并建立异形断面巷道围岩破坏力学模型，确定其合理的支护方式.结果表明，大倾角煤层回采巷道围岩塑性区沿煤层倾斜方向演化，顶底板破坏深度大于两帮，且两帮破坏程度差异大;巷道断面形状不同，导致巷道围岩应力集中程度、塑性区及变形量等有很大差异;拱形巷道围岩变形适应性好，异形巷道两侧的顶角煤易发生剪切破坏，但考虑回采巷道掘进、设备运行及服务年限等需求，常用异形巷道;采用“锚网+钢带+锚索”的支护形式，加强异形巷道顶板帮及坡顶煤的支护，满足支护阻力大于F_○1和F_○2，可明显减少巷道围岩变形，保持巷道的稳定性.

关键词: 大倾角煤层, 断面形状, 应力卸载区, 应力拱, 异形断面

Abstract: Based on distribution of surrounding rock stress in deep inclined seam roadway，the asymmetric distribution law of the plastic zone and stress of different cross-section roadway were studied by using numerical method， and a mechanical model of special-section roadway was established to determine the reasonable support mode. The results show that deep inclined seam roadway plastic zones extend along the dip direction of coal seam，failure of roof and floor is greater than that of ribs， and what is more， different damage and failure occur in ribs; the roadway shape affects the stress concentration， plastic zone and deformation; arched roadway adapts well， and special-shaped tunnel is likely to lead to shear failure-prone in the roof side corner， but taking roadway service life and mining issues into account， special-shaped tunnel can meet the requirements under the existing support conditions. The combination supports of “anchor net + steel band + anchor rope” are adopted to strengthen the rib beside roof and the roof coal for special-shaped tunnel， and the support stress should be above F_○1and F_○2. By this way， surrounding rock deformation is obviously reduced and the roadway can stay stable.

Key words: deep inclined seam； section shape； unloaded stress； stress arch, special-section

中图分类号:

TD353

曹树刚，王帅，王寿全，杨红运. 大倾角煤层回采巷道断面适应性[J]. 东北大学学报:自然科学版, 2017, 38(3): 436-441.

CAO Shu-gang， WANG Shuai， WANG Shou-quan， YANG Hong-yun. Adaptability of Roadway Section Shape in Deep Inclined Seam[J]. Journal of Northeastern University Natural Science, 2017, 38(3): 436-441.

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大倾角煤层回采巷道断面适应性

Adaptability of Roadway Section Shape in Deep Inclined Seam

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