Overlying strata movement coordinated with the compression ratio of backfilling solid in ultra-close coal seams

被引：0

作者：

Zhang S. ^{[1
]}

Zhang J. ^{[1
]}

Yan H. ^{[1
]}

Liu H. ^{[1
]}

Wang J. ^{[1
]}

机构：

[1] School of Mining Engineering, State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou, 221116, Jiangsu

来源：

Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2019年 / 36卷 / 04期

关键词：

Compression ratio; Cooperative control; Solid backfilling mining; Strata movement; Ultra-close coal seams;

D O I：

10.13545/j.cnki.jmse.2019.04.009

中图分类号：

学科分类号：

摘要：

In response to the difficulty in safe extraction of the ultra-close coal seams in Nantun industrial square area, the law of overlying strata movement coordinated with the compression ratio of backfilling solid in ultra-close coal seams is studied through the method integrating physical simulation, numerical simulation and probability. Through the comparison of the characteristics of overlying strata movement under the conditions of traditional caving and solid backfill mining, the key to control the overlying strata movement in ultra-close coal seams is obtained. Based on the law of the overlying strata movement under different compression ratios, the mechanism of the upper and lower coal seam compression ratio coordinated with the overlying strata movement is revealed and the compression ratio in the ultra-close coal seam is optimized. Finally, the cooperative control effect of backfilling solid mining in ultra-close coal seam is predicted by probability integration method. The results have shown that when the compression rate of the upper and lower coal seams is 80%, it can ensure the safety and stability of the surface buildings when the industrial coal pillars are recovered. © 2019, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.

引用

页码：712 / 718

页数：6

共 20 条

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