Overlying rock movement and pressure control in fully mechanized coal caving with weakly bonded roof

被引：0
|
作者：
Zhang X. [1 ,2 ]
Liu J. [2 ,3 ]
Tu M. [1 ]
机构：
[1] Key Laboratory of Coal Mine Safety and Efficiently Caving of Ministry of Education, Anhui University of Science and Technology, Huainan, 232001, Anhui
[2] State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining & Technology, Xuzhou, 221116, Jiangsu
[3] Tangjiahui Colliery, Huaxing Energy Co Ltd, Jungarqi, 017000, Inner Mongolia
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2019年 / 36卷 / 05期
关键词：
Fully mechanized caving mining; Overlying rock movement; Strata behaviors; Thick coal seam; Weakly bonded roof;
D O I：
10.13545/j.cnki.jmse.2019.05.003
中图分类号：
学科分类号：
摘要：
In the process of fully mechanized coal caving mining with weakly bonded thick coal seam, the deformation and collapse of the overlying rock and the characteristics of strata behaviors have an important influence on the safe and efficient mining. Based on the construction of the loose arch structure model of fully mechanized caving face with weakly bonded roof, the dynamic evolution mechanism of overlying strata has been analyzed, and calculation method of support working resistance of the weakly bonded roof on the fully mechanized caving mining face has been presented. The deformation and failure of surrounding rock and evolution of stress distribution in fully mechanized thick coal caving mining face with weakly bonded roof were analyzed through similar simulation and numerical sim- ulation methods, and finally the instability modes of tensile-compression composite instability and shear deformation instability in loose arch structure of overlying rock has been presented. The engineering practice has shown that optimizing the working stage can improve the roof stress environment, effectively control the roof deformation and failure process, and consequently reduce the effect of strata behaviors on the working face mining. © 2019, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
引用
收藏
页码：873 / 878
页数：5
相关论文
共 17 条
  • [1] Wang J., Fully mechanized top coal caving mining is the effective access to solve difficult problem sinthick seam mining, Coal Science and Technology, 33, 2, pp. 1-6, (2005)
  • [2] Wang J., Key technology for fully-mechanized top coal caving with large mining height in extra-thick coal seam, Journal of China Coal Society, 38, 12, pp. 2089-2098, (2013)
  • [3] Yan S., Theory study on the load on support of long wall with top coal caving with great mining height in extra thick coal seam, Journal of China Coal Society, 34, 5, pp. 590-593, (2009)
  • [4] Yu B., Zhu W., Gao R., Et al., Strata structure and its effect mechanism of large space stope for fully-mechanized sublevel caving mining of extremely thick coal seam, Journal of China Coal Society, 41, 3, pp. 571-580, (2016)
  • [5] Li H., Jiang D., Li D., Analysis of ground pressure and roof movement in fully-mechanized top coal caving with large mining height in ultra-thick seam, Journal of China Coal Society, 39, 10, pp. 1956-1960, (2014)
  • [6] Wang J., Huang Z., Yu L., Three plies in top coal"theory and its application in top coal caving mining for ultra-thick coal seams, Journal of China Coal Society, 42, 4, pp. 809-816, (2017)
  • [7] Yang D., Zhang L., Chai M., Et al., Study of roof breaking law of fully mechanized top coal caving mining in ultra-thick coal seam based on fracture mechanics, Rock and Soil Mechanics, 37, 7, pp. 2033-2039, (2016)
  • [8] Han J., Zhang H., Gao Z., Et al., Failure height of weak overburden by layered fully-mechanized mining in extremely thick coal seam, Journal of Mining & Safety Engineering, 33, 2, (2016)
  • [9] Xu Y., Liu S., Liu Z., Et al., Overburden failure laws in working face of short distance thick coal seams group, Journal of Mining & Safety Engineering, 30, 4, pp. 506-511, (2013)
  • [10] Zhang H., Rong H., Han J., Et al., On the overburden failure height in the extra-thick coal seams due to the "weak-weak" overburden structures in different mining stages, Journal of Safety and Environment, 15, 6, pp. 45-50, (2015)
12