Similarity simulation experimental study on abrupt collapse of roof separation in large cross-section argillaceous roadway

被引：0

作者：

Zhao Q. ^{[1
,2
]}

Zhang N. ^{[1
]}

Peng R. ^{[2
]}

Li G. ^{[1
]}

Zhang K. ^{[2
]}

Han C. ^{[1
]}

Shi J. ^{[2
]}

机构：

[1] Key Laboratory of Deep Coal Resource Mining, School of Mines, China University of Mining & Technology, Xuzhou, 221116, Jiangsu

[2] Key Laboratory of Mine Disaster Prevention and Control of Hebei Province, North China Institute of Science and Technology, Sanhe, 065201, Hebei

来源：

| 2018年 / China University of Mining and Technology卷 / 35期

关键词：

Abrupt collapse of roof separation; Critical value of roof separation; Large cross-section argillaceous roadway; Similar simulation; Soft-weak separation stratified roof;

D O I：

10.13545/j.cnki.jmse.2018.06.003

中图分类号：

学科分类号：

摘要：

In view of controlling difficulty of abrupt collapse of roof separation in large cross-section argillaceous roadway and defects of the existing similarity simulation experiment device for roof separation, according to the precise displacement sensing principle, a simulation experiment device monitoring roadway roof separation was developed. The reliability test of the roof separation monitoring device shows that the deformation detected by the displacement sensor and the roof separation of similarity simulation roadway have a good linear correlation, and the measurement error is controlled at ±2%. By this approach, the evolution process of roof separation and catastrophic collapse of large cross-section argillaceous roadway focusing on the Pingshuo coal field was analyzed, and the safety criterion was proposed. The results show that: 1) The process of the roof separation can be defined as two types, namely the gradually stabilizing separation and the abrupt catastrophic separation. 2) Along the development process, the roof separation can be divided into four stages, i.e., the fissure development and separation inoculation, the rapid expansion of the separation, gradual stabilization and abrupt catastrophic collapse. 3) Before the roof separation value reaches the gradual stabilization threshold, reasonable and immediate supplement support can maintain the stability of surrounding rock. If only relying on the existing support methods, the collapse accident will occur in the roadway when the separation value reaches the critical value of abrupt catastrophic separation. The similar simulation device and experimental results provide experimental conditions and decision reference for the study of the mechanism of roof separation instability criterion of potential unstable roadway and the determination of reasonable supplement support time. © 2018, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.

引用

页码：1107 / 1114

页数：7

共 17 条

[1] Zhang B., Kang L., Yang S., Numerical simulation on roof separation and deformation of full seam roadway with stratified roof and large section, Journal of Mining & Safety Engineering, 23, 3, pp. 264-267, (2006)
[2] Yan H., He F., Wang S., Safety control and evaluation of roadway with super-large cross-section and soft-weak thick coal roof, Chinese Journal of Rock Mechanics and Engineering, 33, 5, pp. 1014-1023, (2014)
[3] Zhang L., Analysis on roadway roof separation early warning threshold value for large section and thick top coal, Safety in Coal Mines, 45, 8, pp. 217-220, (2014)
[4] Kong H., Ma N., Wang M., Et al., Controlled stability of rock bolting roadways based on roof abscission layer monitor, China Safety Science Journal, 12, 3, pp. 55-58, (2002)
[5] Wu D., Gao H., Wang A., Sensitivity analysis of influence factors on interlayer separation of complex roof, Journal of Mining & Safety Engineering, 29, 2, pp. 255-260, (2012)
[6] Wu D., Shen F., Quantitative criteria of interlayer separation stability of complex roof in tunnels, Chinese Journal of Rock Mechanics and Engineering, 33, 10, pp. 2040-2046, (2014)
[7] Zhang N., Yuan L., Control principle of separating and broken roof rock strata in roadway, Journal of Mining & Safety Engineering, 23, 1, pp. 34-38, (2006)
[8] Yue Z., Yang R., Yan Z., Et al., Experimental study on stability of surrounding rock of coal roadway with compound roof and large cross section, Journal of China Coal Society, 36, pp. 47-52, (2011)
[9] Kan J., Zhang N., Li G., Et al., Analysis of excavation method of large span open-off cut in deep mine, Journal of Mining & Safety Engineering, 26, 2, pp. 163-167, (2009)
[10] Wang H., Li S., Li W., Et al., Failure mechanism of roadway surrounding rock in deep thick coal seam and its support optimization, Journal of Mining & Safety Engineering, 29, 5, pp. 631-636, (2012)

← 1 2 →