Rock burst mechanism of heading roadway in thick coal seam in magmatic intrusion areas

被引：0
|
作者：
Liu S. [1 ,2 ]
Pan J. [1 ,2 ]
Wang S. [1 ,2 ]
Feng M. [1 ,2 ]
机构：
[1] Coal Mining and Designing Branch, China Coal Research Institute, Beijing
[2] Coal Mining and Designing Department, Tiandi Science and Technology Co., Ltd., Beijing
来源：
| 1600年 / Academia Sinica卷 / 36期
基金：
中国国家自然科学基金;
关键词：
Heading roadway; Magmatic intrusion area; Mining engineering; Rock burst mechanism; Rockburst; Static and dynamic loading;
D O I：
10.13722/j.cnki.jrme.2017.0357
中图分类号：
学科分类号：
摘要：
Rockbursts frequently occur during mining in magmatic intrusion areas. The mechanism of rock burst at heading roadway in thick coal seam in magmatic intrusion areas is thus studied theoretically and numerically. A formula for calculating the stress distribution in surrounding rock of the roadway was deduced based on the elastoplastic theory. The contours of stress distribution shows that the direction of maximum principal stress and the concentration area position of maximum shear stress were perpendicular to the inclination angle of coal seam. The dip angle of coal seam does not change the concentration degree of maximum principal stress and shear stress. The lateral pressure coefficient had a greater influence on the concentration of the maximum principal stress. The large hard magmatic rock roof suspending in the goaf leads to the overall increase of the stress in the large area of coal nearby, which provides the static loading for rockburst. Tunneling induces the instantaneous release of energy from the local magmatic rock, which provides the dynamic loading for rock burst. Based on the above analysis, the mechanical model of rock burst in roadway in thick coal seam in magmatic rock intrusion zone was established, the criterion of rockburst occurrence was obtained and then the mechanism of rockburst was obtained. The application of the research results guided the prevention of rock burst in practice. © 2017, Science Press. All right reserved.
引用
收藏
页码：2699 / 2711
页数：12
相关论文
共 20 条
  • [1] Pan J., Mao D., Lan H., Et al., Study status and prospects of rock burst prevention technology in China, Coal Science and Technology, 41, 6, pp. 21-25, (2013)
  • [2] Dou L., He J., Cao A., Et al., Rock burst prevention methods based on theory of dynamic and static combined load induced in coal mine, Journal of China Coal Society, 40, 7, pp. 1469-1476, (2015)
  • [3] Qi Q., Dou L., Theory and Technology of Rock Burst, pp. 1-8, (2008)
  • [4] Jiang Y., Zao Y., State of the art: investigation on mechanism forecast and control of coal bumps in China, Chinese Journal of Rock Mechanics and Engineering, 34, 11, pp. 2188-2204, (2015)
  • [5] Jiang F., Wei Q., Wang C., Et al., Analysis of rock burst mechanism in extra-thick coal seam controlled by huge thick conglomerate and thrust fault, Journal of China Coal Society, 39, 7, pp. 1191-1196, (2014)
  • [6] Pan Y., Han R., Study on temporal and spatial evolution of microseismic megathrust area under the influence of giant thick conglomerate, National Mining Academic Conference, pp. 1-12, (2015)
  • [7] Li Z., Dou L., Cai W., Et al., Fault-pillar induced rock burst mechanism of thick coal seam in deep mining, Chinese Journal of Rock Mechanics and Engineering, 32, 2, pp. 334-338, (2013)
  • [8] He J., Dou L., Cai W., Et al., Mechanism of dynamic and static combined load inducing rock burst in thin coal seam, Journal of China Coal Society, 39, 11, pp. 2177-2182, (2014)
  • [9] Lan H., Du T., Peng Y., Et al., Rock-burst mechanism and prevention in working face of shallow buried coal-seam, Journal of China Coal Society, 37, 10, pp. 1618-1623, (2012)
  • [10] Pan J., Ning Y., Mao D., Et al., Theory of rock burst start-up during coal mining, Chinese Journal of Rock Mechanics and Engineering, 31, 3, pp. 586-596, (2012)
12