Study on the spatiotemporal evolution law and mechanical mechanism of the three-field of overlying strata in-situ backfill mining

被引：0
|
作者：
Yang K. [1 ,2 ,3 ]
Zhao X. [1 ,3 ]
He X. [1 ,3 ]
Zhou G. [4 ]
Wei Z. [1 ,3 ]
Zhang J. [1 ,3 ]
Ji J. [3 ]
机构：
[1] State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Anhui, Huainan
[2] Institute of Energy, Hefei Comprehensive National Science Center, Anhui, Hefei
[3] School of Mining Engineering, Anhui University of Science and Technology, Anhui, Huainan
[4] National Energy Group Ningxia Coal Industry Co Ltd, Ningxia, Yinchuan
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2023年 / 40卷 / 04期
关键词：
in-situ backfilling; mechanical mechanism; overburden three-field; spatiotemporal evolution;
D O I：
10.13545/j.cnki.jmse.2021.0698
中图分类号：
学科分类号：
摘要：
Based on the backfill panel of a mine in Ningxia, the spatiotemporal evolution law of stress field, displacement field and fracture field in the overburden and the spatiotemporal evolution mechanical mechanism of overburden three fields in backfill mining are studied by similar material simulation experiment and theoretical analysis method. The results show that the stress and displacement at the junction of the backfill panel or coal pillar and backfilling area increase and change greatly, the development degree of rock stratum fracture is high, and the evolution of three fields is active. In the middle of the mining and backfilling area, the increase of roof stress and displacement is gradually stable, the fracture shows a closed trend, and the evolution of three fields in the overburden is gradually stable. The roof stress and displacement go through a stable-active-stable change process, while the fissures go through a development-separation-closure process. With the advance of the backfill panel, the three fields' evolution area expands from low to high, and is temporarily blocked at the thick and hard rock stratum. The three fields' evolution stable area of the rock stratum in the middle backfilling area expands accordingly. The interaction and influence of overburden stress, displacement and fracture are analyzed by mechanical model. The spatiotemporal evolution of three fields in the overburden is closely related to the parameters of backfill panel. Finally, the monitoring results of different backfill panels verify the spatiotemporal evolution law of the overburden three fields in backfill mining, and put forward the backfilling and roof control countermeasures and measures of timely dense backfilling in the in-situ goaf and backfilling in the goaf of medium and high strata according to “three unders” areas with different mining roof conditions. The research results provide an important reference for the backfilling mining engineering in “three unders” areas. © 2023 China University of Mining and Technology. All rights reserved.
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页码：643 / 655
页数：12
相关论文
共 29 条
  • [1] WU Yin, Effectiveness and development direction of filling mining technology in China's coal mines, China Coal, 38, 6, pp. 5-10, (2012)
  • [2] QIAN Minggao, Technological system and green mining concept, Coal Science & Technology Magazine, 4, pp. 1-3, (2003)
  • [3] LIU Jiangong, LI Xinwang, HE Tuan, Application status and prospect of backfill mining in Chinese coal mines, Journal of China Coal Society, 45, 1, pp. 141-150, (2020)
  • [4] WANG Xinfeng, GAO Mingzhong, LI Longqin, Spatiotemporal coupling law of mining pressure, strata movement and fracture field distribution in deep stope, Journal of Mining & Safety Engineering, 33, 4, pp. 604-610, (2016)
  • [5] HUANG Qingxiang, CAO Jian, GAO Bin, Et al., Damage-reducing mining based on three fields evolution in shallow buried closely spaced multi-seam, Journal of Mining & Safety Engineering, 37, 6, pp. 1171-1179, (2020)
  • [6] FAN Gangwei, ZHANG Dongsheng, MA Liqiang, Overburden movement and fracture distribution induced by longwall mining of the shallow coal seam in the Shendong coalfield, Journal of China University of Mining & Technology, 40, 2, pp. 196-201, (2011)
  • [7] ZHANG Jixiong, WU Qiang, HUANG Yanli, Et al., Strata pressure behavior by raw waste backfilling with fully mechanized coal mining technology, Journal of China Coal Society, 35, 1, pp. 1-4, (2010)
  • [8] ZHANG Jixiong, LI Jian, AN Tailong, Et al., Deformation characteristic of key stratum overburden by raw waste backfilling with fully-mechanized coal mining technology, Journal of China Coal Society, 35, 3, pp. 357-362, (2010)
  • [9] LIU Jiangong, ZHAO Jiawei, LI Mengmeng, Et al., Continuous curved beam formation and strata control theory in coal backfill mining, Journal of China Coal Society, 41, 2, pp. 383-391, (2016)
  • [10] LIU Jiangong, ZHAO Jiawei, YANG Hongzeng, Study on the time and space characteristics of continuous curved beam under backfilling mining condition, Coal Science and Technology, 45, 1, pp. 41-47, (2017)
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