Mining methods and roof caving mechanism in longwall mining through th abandoned gateroads of small mines

被引：0
|
作者：
Li Y. [1 ]
Zhu E.-G. [1 ]
Zhang K.-N. [1 ]
Qi B.-D. [1 ]
Su J.-M. [1 ]
Cao P. [1 ]
Cao M. [1 ]
Li C.-K. [1 ]
Wang J.-X. [1 ]
Wang Z. [1 ]
机构：
[1] College of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing
来源：
| 1600年 / China Coal Society卷 / 42期
关键词：
Abandoned gateroad of small mines; Stability of shield-ground; Swing-inclined face;
D O I：
10.13225/j.cnki.jccs.2016.1668
中图分类号：
学科分类号：
摘要：
Ground pressure behavior is different from that at ordinary panel face in longwall mining when the coal face goes through the abandoned gateroad of small mines. It is easy to induce the accident of face spalling, roof fall and crush shield support. In this paper, Cuijiazhai E13103 panel was used as a research site. By using mechanical analysis, numerical simulation and field measurement, the stress distribution for the panel in the disturbed area was determined with research on the damage range of the vertical, oblique and parallel abandoned gateroads of small mines. For the different types of abandoned gateroads, the mining technique was established for passing through the damaged area. Especially for the four parallel abandoned gateroads across the panel, the “swing-inclined face” mining method was employed in this paper. The mechanical model of roof caving was built by considering the stability of shield-ground. The abutment pressure distribution of “swing-inclined face” was determined as well by using numerical simulation. By analyzing the relation between “roof-shield-abandoned gateroads-pillar-intact coal”, the reasonable supporting capacity of shield was calculated when the face was in the damaged areas. It reveals the problems that the shield selection is not reasonable and it effectively guides the shield design and shield selection. Technical measures for safe mining were also proposed in longwall mining through the abandoned gateroad of small mines. © 2017, Editorial Office of Journal of China Coal Society. All right reserved.
引用
收藏
页码：16 / 23
页数：7
相关论文
共 17 条
  • [1] Li Y., Overburden movement in solid waste rock cemented backfill mining methods, Journal of China Coal Society, 36, 9, pp. 370-374, (2011)
  • [2] Li Y., Groundwater system for the periods of pre-and post-longwall mining over thin overburden, International Journal of Mining, Reclamation and Environment, 30, 4, pp. 295-311, (2016)
  • [3] Wang J., Wang Z., Stability of main roof structure during the first weighting in shallow high-intensity mining face with thin bedrock, Journal of Mining & Safety Engineering, 32, 2, pp. 175-181, (2015)
  • [4] Wang H., Jiang Y., Deng B., Et al., Study of stress state of coal pillar in failure zone of coal seam under dynamic pressure of mining, Journal of Rock Mechanics and Engineering, 33, 10, pp. 2056-2063, (2014)
  • [5] Wang J., Mechanism of the rib spalling and the controlling in the very soft coal seam, Journal of China Coal Society, 32, 8, pp. 785-788, (2007)
  • [6] Li Y., Peng S.S., Zhang J., Impact of longwall mining on groundwater above the longwall panel in shallow coal seams, Journal of Rock Mechanics and Geotechnical Engineering, 7, 3, pp. 298-305, (2015)
  • [7] Deng B., Investigation on repeated mining technology of failurezone in Xinliu coal mine, (2013)
  • [8] Wang J., Song Z., Characteristic and control method of initial interface between coal and rock under fully mechanized loose top coal caving, Coal Engineering, 47, 7, pp. 1-4, (2015)
  • [9] Zhang X., Test and study on resource recycle in left-over areas of thick coal seams, pp. 27-43, (2011)
  • [10] Xu M., Surrounding rock control and security technology re-search on old residual coal mining longwall mining, pp. 21-40, (2012)
12