Surrounding rock failure mechanism of reserved roadway under superimposed mining and its control technology

被引：0

作者：

Lyu K. ^{[1
,2
,3
]}

Deng Z. ^{[1
,2
]}

Feng J. ^{[4
]}

Xuan Z. ^{[1
,2
]}

Xiao J. ^{[5
]}

Wu X. ^{[6
]}

机构：

[1] Mine Safety Technology Branch of China Coal Research Institute, Beijing

[2] State Key Laboratory of Coal Mining and Clean Utilization, China Coal Research Institute, Beijing

[3] College of Safety Science and Engineering, Liaoning Technical University, Fuxin, 123000, Liaoning

[4] College of Safety Engineering, North China Institute of Science and Technology, Beijing

[5] Beijing Tiandi Huatai Mining Management Co Ltd, Beijing

[6] Institute of Mining Engineering, Inner Mongolia University of Science and Technology, Baotou, 014010, Inner Mongolia

来源：

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

关键词：

Deformation and damage; Plastic zone; Reserved roadway; Superimposed mining; Surrounding rock control;

D O I：

10.13545/j.cnki.jmse.2019.04.006

中图分类号：

学科分类号：

摘要：

This study focuses on the serious deformation and failure of reserved roadway affected by superimposed mining of upper and lower coal seams in Buertai coalmine. Comprehensive research methods including theoretical analysis, field monitoring, laboratory test, numerical simulation and in- dustrial test were adopted. From the perspective of formation and development of plastic zone in roadway surrounding rock, the failure characteristics of surrounding rock, the temporal and spatial evolution of mining stress, the failure mechanism of plastic zone malignant extension around reserved roadway, and the surrounding rock control technology by changing stress were systematically investigated. Results showed that: after superimposed mining of upper and lower coal seams, the reserved roadway is in the zone with high stress ratio. The ratio of principal stress is 1.84-2.22. The angle between maximum principal stress and vertical direction is 39.7°-41.9°, which results in plastic zone vicious expansion in the roadway surrounding rock. The depth of roof failure is 7.5 meters. While the depth of floor failure is 4.5 meters, the depth of pillar failure is 3 meters, and the depth of wall failure is 2.25 meters, respectively. Stress control technology is put forward based on plastic zone failure mechanism. By changing the size of coal pillar or mining layout of upper and lower working faces, the surrounding rock stress is controlled. Meanwhile, the plastic failure range of surrounding rock reduces. Finally, industrial tests are carried out and shows good application results. © 2019, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.

引用

页码：685 / 695

页数：10

共 13 条

[1] Zhao Z., Ma N., Guo X., Et al., Falling principle and support design of butterfly-failure roof in large deformation mining roadways, Journal of China Coal Society, 41, 12, pp. 2932-2939, (2016)
[2] Guo X., Ma N., Zhao X., Et al., General shapes and criterion for surrounding rock mass plastic zone of round roadway, Journal of China Coal Society, 41, 8, pp. 1871-1877, (2016)
[3] Ma N., Zhao X., Zhao Z., Et al., Stability analysis and control technology of mine roadway roof in deep mining, Journal of China Coal Society, 40, 10, pp. 2287-2295, (2015)
[4] Liu H., Wu X., Hao Z., Et al., Evolution law and stability control of plastic zones of retained entry of working face with double roadways layout, Journal of Mining & Safety Engineering, 34, 4, pp. 689-697, (2017)
[5] Jia H., Li G., Wang L., Et al., Characteristics of stress-field environment and roof falling mechanism of mining influenced roadway, Journal of Mining & Safety Engineering, 34, 4, pp. 707-714, (2017)
[6] Jia H., Ma N., Zhu Q., Mechanism and control method of roof fall resulting from butterfly plastic zone penetration, Journal of China Coal Society, 41, 6, pp. 1384-1392, (2016)
[7] Ma N., Li J., Zhao Z., Distribution of the deviatoric stress field and plastic zone in circular roadway surrounding rock, Journal of China University of Mining & Technology, 44, 2, pp. 206-213, (2015)
[8] Yu W., Wu G., Yuan C., Et al., Failure characteristics and engineering stability control of road-way surrounding rock based on deviatoric stress field, Journal of China Coal Society, 42, 6, pp. 1408-1419, (2017)
[9] Yuan C., Wang W., Feng T., Et al., Research on control principles of surrounding rocks of roadway based on expansion of plastic zone, Journal of Mining & Safety Engineering, 34, 6, pp. 1051-1059, (2017)
[10] Wang W., Yu W., Yuan Y., Et al., Failure mechanism of the sub inclined shaft in floor under mining influence and its control research, Journal of China Coal Society, 39, 8, pp. 1463-1472, (2014)

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