Innovative backfilling longwall panel layout for better subsidence control effect—separating adjacent subcritical panels with pillars

被引：18

作者：

Xu J. ^{[1
,2
]}

Xuan D. ^{[1
,2
]}

He C. ^{[1
,2
]}

机构：

[1] State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou

[2] School of Mines, China University of Mining and Technology, Xuzhou

来源：

International Journal of Coal Science & Technology | 2014年 / 1卷 / 3期

关键词：

Longwall mining; Mining with backfill; Separated pillar; Subcritical panel width; Surface subsidence control;

D O I：

10.1007/s40789-014-0018-1

中图分类号：

学科分类号：

摘要：

In recent years, field trials of non-pillar longwall mining using complete backfill have been implemented successively in the Chinese coal mining industry. The objective of this paper is to get a scientific understanding of surface subsidence control effect using such techniques. It begins with a brief overview on complete backfill methods primarily used in China, followed by an analysis of collected subsidence factors under mining with complete backfill. It is concluded that non-pillar longwall panel layout cannot protect surface structures against damages at a relatively large mining height, even though complete backfill is conducted. In such cases, separated longwall panel layout should be applied, i.e., panel width should be subcritical and stable coal pillars should be left between the adjacent panels. The proposed method takes the principles of subcritical extraction and partial extraction; in conjunction with gob backfilling, surface subsidence can be effectively mitigated, thus protecting surface buildings against mining-induced damage. A general design principle and method of separated panel layout have also been proposed. © 2014, The Author(s).

引用

页码：297 / 305

页数：8

共 42 条

[1]

Bieniawski Z.T., Peng S.S., Improved design of coal pillars for us mining conditions, Proceedings of the 1st conference on ground control in mining, Morgantown, pp. 13-22, (1981)

[2]

Bieniawski Z.T., A method revisited: coal pillar strength formula based on field investigations. In: Proceedings of the Second International Workshop on Coal Pillar Mechanics and Design. US. Bureau of Mines, IC9315, pp 158–165, (1992)

[3]

Chen D., Annuals of Shengli Coal Mine in Fushun Mining District, (1992)

[4]

Colaizzi G.J., Whaite R.H., Donner D.L., Pumped-slurry backfilling of abandoned coal mine workings for subsidence control at Rock Springs, WY. US Bureau of Mines, IC, (1981)

[5]

Donovan J.G., Karfakis M.G., Design of backfilled thin-seam coal pillars using earth pressure theory, Geotech Geol Eng, 22, 4, pp. 627-642, (2004)

[6]

Du X., Lu J., Morsy K., Peng S., Peng S.S., Mark C., Finfinger G.L., Tadolini S.C., Khair A.W., Heasley K.A., Luo Y., Coal pillar design formulae review and analysis, Proceedings of the 27th International Conference on Ground Control in Mining, Morgantown, pp. 254-261, (2008)

[7]

Feng G.M., Sun C.D., Wang C., Zhou Z., Research on goaf filling methods with super high-water material, J China Coal Soc, 35, 12, pp. 1963-1968, (2010)

[8]

Gandhe A., Venkateswarlu V., Gupta R.N., Extraction of coal under a surface water body–a strata control investigation, Rock Mech Rock Eng, 38, 5, pp. 399-410, (2005)

[9]

Grice T., Underground mining with backfill. In: Proceedings of the 2nd Annual Summit-Mine Tailings Disposal Systems, Brisbane, pp, 234–239, (1998)

[10]

Ilgner H.J., The benefits of ashfilling in South African coal mines, Coal–the Future, 12th International Conference on Coal Research, pp. 279-288, (2000)

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