长壁孤岛工作面冲击失稳能量场演化规律

›› 2013, Vol. 34 ›› Issue (S1): 479-485.

长壁孤岛工作面冲击失稳能量场演化规律

王宏伟¹，姜耀东^{1, 2}，高仁杰¹，刘帅¹

1. 中国矿业大学（北京）力学与建筑工程学院，北京 100083；2. 中国矿业大学（北京）煤炭资源与安全开采国家重点实验室，北京 100083

收稿日期:2013-05-07 出版日期:2013-08-30 发布日期:2014-06-09
作者简介:王宏伟，男，1981年生，博士，讲师，主要从事岩石力学与采矿工程的研究工作
基金资助:
国家重点基础研究发展规划(973)项目(No.2010CB226801)；中国博士后科学基金特别资助(No.2012T50161)；中国博士后科学基金资助(No.2011M500448)；中国矿业大学煤炭资源与安全开采国家重点实验室开放基金项目资助（No.SKLCRSM11KFB07）；国家自然科学基金项目(No.51174213)。

Evolution of energy field instability of island longwall panel during coal bump

WANG Hong-wei¹，JIANG Yao-dong^1,2，GAO Ren-jie¹, LIU Shuai¹

1. School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China; 2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China

Received:2013-05-07 Online:2013-08-30 Published:2014-06-09

摘要/Abstract

摘要： 煤矿冲击地压一直是困扰中国煤矿安全的主要问题，而煤矿开采过程中跳采形成的孤岛工作面由于容易产生应力集中，来压强度提高，极容易发生冲击地压。基于唐山矿T2193下孤岛工作面的地质条件，从数值分析的角度研究了煤岩体材料的非均匀性，揭示了孤岛工作面顶板周期来压时煤岩体能量释放的动态特征，分析了工作面前方能量释放激增机制。数值模拟结果显示，长壁工作面回采过程中直接顶的不断垮落造成了老顶悬空距离的不断增大，工作面周期来压时，积聚于老顶岩层内的弹性应变能将瞬间释放，容易引发工作面及巷道的冲击失稳。孤岛工作面由于其特有的矿压显现特征，老顶周期破断时所释放的弹性应变能将更加剧烈，冲击地压势必愈加强烈。孤岛工作面顶底板和煤层的能量释放激增可以作为判断煤岩体冲击失稳的前兆信息。孤岛工作面前方发生冲击破坏的主要原因是由于工作面回采过程中围岩所积聚的大量弹性能在顶板断裂时所伴随的巨大能量释放而造成的。

关键词: 孤岛工作面, 冲击地压, 弹性应变能, 周期来压, 数值分析

Abstract: Coal bumps have been a major safety concern in underground coal mines in China for more than fifty years. In general, a coal bump refers to a sudden and violent failure of a coal seam that releases contained elastic energy and expels a large amount of coal and rock into the roadway or working face where men and machinery are present. It can cause fatality, injury and significant economic loss for the coal mining industry. Coal bumps occur more frequently in an island longwall panel, which is surrounded by previously mined panels, than in other longwall panels because of its high-stress concentration. In order to investigate the suddenly release of strain energy during extraction of mining face, the nonhomogeneity of materials will be considered to understand the mechanism of energy explosion during periodic weighting of the island longwall panel. Numerical simulations were conducted to study the dynamical character of elastic strain energy relief based on the geological conditions of T2193B island longwall panel in the Tangshan coal mine. Numerical results suggest that the constant collapse of immediate roof will cause continuously increasing of the main roof suspension. Meanwhile, the accumulated elastic strain energy in main roof will abruptly release when the periodic weighting occurs. At this moment, the coal bumps will occur more frequently in the mining face and roadways. It can be revealed that elastic strain energy explosion of main roof and coal seam during periodic weighting is considered to be an important precursor of coal bump occurrence during the extraction of an island longwall panel. Therefore, the significant reason of occurrence of coal bump is the suddenly elastic strain energy explosion during the periodic weighting of man roof. This study of coal bumps in the island longwall panel is of significant importance for coal mine safety and productivity.

Key words: island longwall panel, coal bump, elastic strain energy, periodic weighting, numerical simulation

中图分类号:

TU 443

王宏伟，姜耀东，高仁杰，刘帅 . 长壁孤岛工作面冲击失稳能量场演化规律[J]. , 2013, 34(S1): 479-485.

WANG Hong-wei ，JIANG Yao-dong ，GAO Ren-jie , LIU Shuai . Evolution of energy field instability of island longwall panel during coal bump[J]. , 2013, 34(S1): 479-485.

参考文献

相关文章 15

[1]	梁珂, 陈国兴, 刘抗, 王彦臻, . 饱和珊瑚砂最大动剪切模量的循环加载衰退特性及预测模型[J]. 岩土力学, 2020, 41(2): 601-611.
[2]	朱才辉, 崔晨, 兰开江, 东永强. 砖-土结构劣化及入侵建筑物拆除对榆林卫城稳定性影响[J]. 岩土力学, 2019, 40(8): 3153-3166.
[3]	王岗, 潘一山, 肖晓春, . 单轴加载煤体破坏特征与电荷规律研究及应用[J]. 岩土力学, 2019, 40(5): 1823-1831.
[4]	李宁, 杨敏, 李国锋. 再论岩土工程有限元方法的应用问题[J]. 岩土力学, 2019, 40(3): 1140-1148.
[5]	郑黎明, 张洋洋, 李子丰, 马平华, 阳鑫军, . 低频波动下考虑孔隙度与压力不同程度变化的岩土固结渗流分析[J]. 岩土力学, 2019, 40(3): 1158-1168.
[6]	王建军, 陈福全, 李大勇. 低填方加筋路基沉降的Kerr模型解[J]. 岩土力学, 2019, 40(1): 250-259.
[7]	朱斯陶, 姜福兴, 朱海洲, 张俊杰, 连鸿全, 韩国庆, . 高应力区掘进工作面冲击地压事故发生机制研究[J]. 岩土力学, 2018, 39(S2): 337-343.
[8]	闫澍旺，李嘉，闫玥，陈浩，. 黏性土地基中竖向圆孔的极限稳定深度研究[J]. , 2018, 39(4): 1176-1181.
[9]	阿比尔的，郑颖人，冯夏庭，丛宇,. 平行黏结模型宏细观力学参数相关性研究[J]. , 2018, 39(4): 1289-1301.
[10]	郭浩然，乔兰，李远. 能源桩与周围土体之间荷载传递模型的改进及其桩身承载特性研究[J]. , 2018, 39(11): 4042-4052.
[11]	李一凡，董世明，潘鑫，李念斌，原野. 砂岩的I/III复合型断裂试验研究[J]. , 2018, 39(11): 4063-4070.
[12]	郭洋，李清，徐文龙，钱路，田策. 条形药包爆破预制贯通裂纹动态断裂过程研究[J]. , 2018, 39(10): 3882-3890.
[13]	刘天翔，王忠福, . 隧道正交穿越深厚滑坡体的相互影响分析与应对措施[J]. , 2018, 39(1): 265-274.
[14]	郭建强，刘新荣，赵青，. 岩石卸荷力学特性的理论研究[J]. , 2017, 38(S2): 123-130.
[15]	宋许根，陈从新，夏开宗，陈龙龙，付华，邓洋洋，杜根明,. 竖井变形破坏机制与继续使用可行性探究[J]. , 2017, 38(S1): 331-342.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed