Research on Rational Staggered Distance at Combined Mining Face of Contiguous Coal Seams with Thinner Top and Thicker Bottom and on Relations between Supports and Wall Rocks

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Authors

  • Zhong Tao
     Faculty of Resource Engineering, Longyan University, Longyan Mining and Safety Engineering Research Center, Longyan, Fujian, 364 012 ,CN
  • Guo Yusen
     Faculty of Resource Engineering, Longyan University, Longyan Mining and Safety Engineering Research Center, Longyan, Fujian, 364 012 ,CN
  • Lin Luyao
     Faculty of Resource Engineering, Longyan University, Longyan Mining and Safety Engineering Research Center, Longyan, Fujian, 364 012 ,CN
  • Li Di
     Changchun Gold Design Institute, Changchun, Jilin, 130 000 ,CN

Keywords:

Contiguous Coal Seams, Combined Mining, Rational Staggered Distance, Relations between Supports and Wall Rocks.

Abstract

For combined mining conditions of contiguous coal seams with thinner top and thicker bottom, the paper used overburden movement rules, stress superposition, and the theory of staggered distance as well to research on what influences the design of rational staggered distance at combined mining face and on relations between supports and wall rocks for the low seam face. The research results were: (1) through both overburden movement rules and stress superposition of coal seam roofs and floors, the paper computed staggered distances of contiguous coal seams, and the largest distance was determined as the correction value. The paper finally determined the rational staggered distance at combined mining face of contiguous coal seams to be 48 m. (2) In combination with the damage ranges of strata between rock layers and breakage intervals, the paper proposed an interbedded cantilever beam structure of “breakage blocks - loose blocks - damage blocks” that was formed on the overburden of the mined low seam face behind the stable-pressure area. (3) The paper analyzed the breakage height of the cantilever beam on the overburden and the roof control range. Computation results showed that the support resistance of the low seam face was 6000 KN.

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Published

2022-10-19

How to Cite

Tao, Z., Yusen, G., Luyao, L., & Di, L. (2022). Research on Rational Staggered Distance at Combined Mining Face of Contiguous Coal Seams with Thinner Top and Thicker Bottom and on Relations between Supports and Wall Rocks. Journal of Mines, Metals and Fuels, 64(12), 619–624. Retrieved from http://informaticsjournals.com/index.php/jmmf/article/view/31625

Issue

Volume 64, Issue 12, December 2016

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

 

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