Top-coal caving structure and technology for increasing recovery rate at extra-thick hard coal seam

被引：0
|
作者：
Pang Y.-H. [1 ,2 ]
Wang G.-F. [1 ]
机构：
[1] Coal Ming and Designing Department, Tiandi Science & Technology Co. Ltd, Beijing
[2] Coal Mining & Design Branch, China Coal Research Institute, Beijing
来源：
| 1600年 / China Coal Society卷 / 42期
关键词：
Cantilever beam mechanical model; Extra-thick hard coal seam; Full-mechanized caving mining with large mining height; Rib spalling; Top-coal caving and drawing characteristics;
D O I：
10.13225/j.cnki.jccs.2016.0763
中图分类号：
学科分类号：
摘要：
In order to overcome the poor caving property problem of extra-thick hard coal seam with shallow depth in mining area of west China, the top-coal caving structure and recovery rate improvement technologies were analyzed through theoretical model calculation, numerical modeling analysis and equipment structure optimization design based on the coal seam occurrence conditions at Jinjitan Coal Mine. Through building the cantilever beam model for extra-thick hard coal seam, the relationship between the top-coal thickness and the cantilever ultimate fracture length was analyzed and calculated. The damage effect from the repeating support of hydraulic support on the top-coal was quantitatively analyzed for the first time, and the top-coal damage depth and lumpiness from the active support reaction and support frequency of hydraulic support was studied. The contradiction between the rib spalling prevention and top-coal recovery rate improvement was analyzed, which could be settled by optimizing the network structure of hydraulic support. Three level efficient top-coal caving institution and the rear scraper conveyor cross side discharge arrangement were innovatively designed, which enhanced the top-coal recovery rate and efficiency. © 2017, Editorial Office of Journal of China Coal Society. All right reserved.
引用
收藏
页码：817 / 824
页数：7
相关论文
共 18 条
  • [1] Gong P., Jin Z., Mechanical model study on roof control for fully-mechanized coal face with large mining height, Chinese Journal of Rock Mechanics and Engineering, 27, 1, pp. 193-198, (2008)
  • [2] Wang G., Development of fully-mechanized coal mining technology and equipment, Coal Science and Technology, 41, 9, pp. 44-48, (2013)
  • [3] Wang G., Research and commercialization progress of key technology for high rank hydraulic powered support, Coal Science and Technology, 39, 4, pp. 78-83, (2011)
  • [4] Yuan Y., Tu S., Wang Y., Et al., Discussion on key problem and counter measures of fully mechanized mining technology with high mining height, Coal Science and Technology, 38, 1, pp. 4-8, (2010)
  • [5] Deng X., Zhang J., Huang P., Et al., Roof movement characteristics in extra thick coal seam mining with the upward slicing filling technology, Journal of China Coal Society, 40, 5, pp. 994-1000, (2015)
  • [6] Zhang X., Zhou G., Liu Z., Et al., Study on slicing top coal caving mining technology in ultra thick seam, Coal Science and Technology, 41, 7, pp. 38-42, (2013)
  • [7] Zhao Q., Li Y., Wang X., Et al., Research on regularity of strata behavior in fully mechanized coal face with pre mining top slicing in thick seam, Journal of North China Institute of Science and Technology, 7, 3, pp. 23-26, (2010)
  • [8] Wang G., Pang Y., Relationship between hydraulic support and surrounding rock coupling and its application, Journal of China Coal Society, 40, 1, pp. 30-34, (2015)
  • [9] Xie X., Zhao T., Analysis on the top-coal caving structure of extra-thick hard coal seam with shallow depth in fully mechanized sublevel caving mining, Journal of China Coal Society, 41, 2, pp. 359-366, (2016)
  • [10] Wang G., Pang Y., Liu J., The determination and influence of cutting height on top coal caving with great mining height in extra thick coal seam, Journal of China Coal Socity, 37, 11, pp. 1777-1782, (2012)
12