Research on Surface Movement Deformation Characteristics of Full-Pillar Extraction by Filled Wide Working Face Layout in Strip Mining

Abstract:

Full-pillar extraction by filled wide working face layout in strip mining resolved the course of surface deformation and moving into two period drew support from wide working face layout in partial mining, filling in roof falling zone and full-pillar extraction. It could carry point of reducing mining effect and protecting surface.This paper explained technical principle of full-pillar extraction by filled wide working face layout in strip mining, and analysed effect of wide working face partial mining and roof filling in falling zone in this technology, and researched the features of surface deformation and moving with this technology in a demonstration. Resources under buildings and Coal demand increased year by year with rapid development of economy and it speeding up depletion of common resources,therefor,coal seam under rivers,buildings and railways reasonable mining has important significance for improving recovery and relieving energy shortage.Coal seam under rivers,buildings and railways reserves reached 137.9Gt in State owned coal mine according to statistics, which coal seam under buildings makes 94.68Gt account 69% of the total and constraints mine development.To some degree,although traditional reduce subsidence mining technology settled pressed coal mining problems,but its extension limited by low recovery,the high cost,difficult to carry out and the difference with saving resources and high efficient.Full-pillar extraction by filled wide working face layout in strip mining resolved the course of surface deformation and moving into two period drew support from wide working face layout in partial mining,filling in roof falling zone and full-pillar extraction,which could carry point of reducing mining effect.It is one of the technological approaches to make high recovery,the low cost and high efficient in pressed coal mining.This paper analyzed wide working face in strip mining and filling effects in the strata movement control and researched the ground deformation features by an example with Full-pillar extraction by filled wide working face layout in strip mining.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 1183-1188
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.1183
• Online since: June 2014
• Authors: Peng Liang Liu
• Keywords: Features of Surface Deformation and Moving, Filling in Roof Falling Zone, In Stage, Wide Working Face Partial Mining

References

[1] Yin Wu. China Coal, 2012, 38(6): 5-10. (In Chinese).

[2] Li-xin Pang. China Coal, 2012, 38(6): 14-17. (In Chinese).

[3] Fu-guang Liu, Guo-yu Zhang, Bo-chao An, etc. China Coal, 2012, 38(12): 104~107. (In Chinese).

[4] Hua-xing Zhang, Xiao-gang Li, De-min Liu. Coal mining Technology, 2002, (2): 16-18. (In Chinese).

[5] Hua-xing Zhang. Proccedings of Beijing Research Institute of Coal Mining[C]. Beijing: Coal Industry Publishing House, 2005: 26-29. (In Chinese).

[6] Hua-xing Zhang, Jian-xue Wang. Mine Surveying, 2000(2): 22-24. (In Chinese).

[7] Jian-xue Wang, Tian-quan Liu. Coal Mining Technology, 2001(1): 44-45. (In Chinese).

[8] state bureau of coal industry. Mining regulation of coal seam under buildings, water body, railways and the main laneway[S]. Beijing: coal industry publishing house, (2000).