Stability and control technology for coal roadway of composite roof with thin-layered and argillaceous

Stability and control technology for coal roadway of composite roof with thin-layered and argillaceous

Mingzhou ZhaoRenshu Yang Juan Fang

School of Resources and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China

College of Mining Engineering, Guizhou University of Engineering Science, Bijie 551700, China

School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China

School of Civil Engineering, Guizhou University of Engineering Science, Bijie 551700, China

Corresponding Author Email: 
785895722@qq.com
Page: 
239-255
|
DOI: 
https://doi.org/10.3166/RCMA.28.239-255
| | | | Citation

ACCESS

Abstract: 

In order to solve the technical problem of coal roadway supporting with thin-layered argillaceous composite roof, using the background of the #53121 conveyance roadway in Zhaozhuang Coal Mine, the deformation failure law and control technology of coal roadway with thin-layered argillaceous composite roof are explored by combining the research methods of field investigation, laboratory experiment and similar material simulation as well as field tests.The obtained results indicate that the deformation failure of coal roadway is influenced by the surrounding rock structure, ground stress, groundwater and support parameter. The thickness of stratification of immediate roof not only affects the deformation and failure morphology of the surrounding rock, but also plays a positive role in the stability of the main roof. Based on the theory of combination beam, the joint supporting technique with the main body of long anchor + short anchor in the roof, anchor + bolt in roadway ' s sides and the accessory body of steel beam + metal net is proposed, and field test is carried out. The deformation observation results of surrounding rock show that the support technology can effectively control the deformation and failure of surrounding rock with thin-layered argillaceous composite roof, and significantly improve the stability of surrounding rock.

Keywords: 

thin-layered, compound roof, similar material simulation, composite beam, combined support

1. Introduction
2. Engineering background
3. The test of deformation and failure law of roadway surrounding rock
4. Control principle and countermeasures of surrounding rock
5. Field application effect analysis
6. Conclusion
Acknowledgment

This paper was supported by the Guizhou science and technology plan project (LH [2017]7014 of Guizhou Branch), the National Natural Science Foundation of China Coal Joint Fund (51134025).

  References

Bai J. B., Hou C. J., Du M. M., Ma D. C. (2001). On bolting support of roadway in extremely soft seam of coal mine with complex roof. Chinese Journal of Rock Mechanics and Engineering, Vol. 20, No. 1, pp. 53-56. https://doi.org/10.3321/j.issn:1000-6915.2001.01.012

Chen S. Y., Song C. S., Guo Z. B., Wang J., Wang Y. (2016). Asymmetric deformation mechanical mechanism and control countermeasure for deep roadway affected by mining. Journal of China Coal Society, Vol. 41, No. 1, pp. 246-254. https://doi.org/10.13225/j.cnki.jccs.2015.0350

Coggan J., Gao F. Q., Stead D., Elmo D. (2012). Numerical modelling of the effects of weak immediate roof lithology on coal mine roadway stability. International Journal of Coal Geology, pp. 90-91. https://doi.org/10.1016/j.coal.2011.11.003

Gao J. H., Kang T. H., Jin Z. M., Zheng T. B. (2004). Similar simulation study on crack development law of surrounding rocks of roadway with great-thick thin-bedded top roof. Chinese Journal of Rock Mechanics and Engineering, Vol. 23, No. 19, pp. 3292-3297. https://doi.org/10.3321/j.issn:1000-6915.2004.19.014

Gao R., Zhang J. X., Spearing A. J. S., Li M., An B. F., Hao D. Y. (2016). Research into stope roof control of compound roof by solid backfilling mining. International Journal of Mining Science and Technology, Vol. 26, No. 4, pp. 609-614. https://doi.org/10.1016/j.ijmst.2016.05.012

Kang H. P. (2016). Sixty years development and prospects of rock bolting technology for underground coal mine roadways in China. Journal of China University of Mining & Technology, Vol. 45, No. 6, pp. 1071-1081.

Liu A. Q., Zhang J., Cheng P., Zhang Y. H. (2014). Numerical simulation on the effect of compound roof separation position on bolting performance. Advanced Materials Research, Vol. 953-954, pp. 1638-1642. https://doi.org/10.4028/www.scientific.net/AMR.953-954.1638

Liu S. W., Luo Y. F., Jia H. S. (2018). Energy response characteristics of rock interface under drilling of roof anchorage borehole in coal roadway. Journal of China University of Mining & Technology, Vol. 47, No. 1, pp. 88-96. https://doi.org/10.13545/j.cnki.jmse.2017.04.020

Meng Q. B., Han L. J., Qiao W. G., Zong Y. J., Li Y., Li H. (2016). Evolution law and control technology of surrounding rock for weak and broken coal roadway with large cross section. Journal of China Coal Society, Vol. 41, No. 8, pp. 1885-1895. https://doi.org/10.13225/j.cnki.jccs.2015.1312

Meng Q. B., Kong L. H., Han L. J., Li Y., Gao J. (2017). Stability control technology for deep soft and broken composite roof in coal roadway. Journal of China Coal Society, Vol. 42, No. 10, pp. 2554-2564. https://doi.org/10.13225/j.cnki.jccs.2017.0336

Su, X. G., Song, X. M., Li, H. C., Yuan, H. H., Li, B. K. (2014). Study on coupled arch-beam support structure of roadway with extra-thick soft compound roof. Chinese Journal of Rock Mechanics and Engineering, Vol. 33, No. 9, pp. 1828-1836. https://doi.org/10.13722/j.cnki.jrme.2014.09.013

Wang F. T., Zhang C., Wei S. F., Zhang X. G., Guo S. H. (2016). Whole section anchor–grouting reinforcement technology and its application in underground roadways with loose and fractured surrounding rock. Tunnelling and Underground Space Technology incorporating Trenchless Technology Research, Vol. 51, pp. 133-143. https://doi.org/10.1016/j.tust.2015.10.029

Wei J. P., Gao J. H., Chen S. Q. (2009). Ancho ring design for thin-layered composite roof based on beam-arch compound structure. Journal of Mining & Safety Engineering, Vol. 26, No. 4, pp. 499-502. https://doi.org/10.3969/j.issn.1673-3363.2009.04.022

Wu D. Y., Shen F. J. (2014). Quantitative criteria of interlayer separation stability of complex roof in tunnels. Chinese Journal of Rock Mechanics and Engineering, Vol. 33, No. 10, pp. 2040-2046. https://doi.org/10.13722/j.cnki.jrme.2014.10.010

Yan H., He F. L., Yan T., Li L. Y., Zhang S. B., Zhang J. X. (2016). The mechanism of bedding separation in roof strata overlying a roadway within a thick coal seam: A case study from the Pingshuo Coalfield, China. Engineering Failure Analysis, Vol. 62, pp. 75-92. https://doi.org/10.1016/j.engfailanal.2015.12.006

Yang P., Hua X. Z., Yang K., Pang D. D., Cheng S. X. (2017). Experiment of compound roof deformation characteristics of gob-side retaining entry in deep mine and support measures. Journal of Mining & Safety Engineering, Vol. 34, No. 6, pp. 1067-1074. https://doi.org/10.13545/j.cnki.jmse.2017.06.005

Yang Y. K., Ji C. X., Kang T. H., Chai Z. Y. (2011). Damage mechanisms of mudstone roof with great-thick in coal roadway and its controlling countermeasures. Chinese Journal of Rock Mechanics and Engineering, Vol. 30, No. 1, pp. 58-67. https://doi.org/10.3724/SP.J.1077.2011.00271

Yu W. J., Wang W. J., Wen G. H., Zhang N., Wu H., Zhang Y. Q. (2012). Deformation mechanism and control technology of coal roadway under deep well and compound roof. Chinese Journal of Geotechnical Engineering, Vol. 34, No. 8, pp. 1501-1508. https://doi.org/10.1007/s11783-011-0280-z

Yuan Y., Zhu Y. J., Wang W. J., Yu W. J. (2014). Failure mechanism of Mesozoic soft rock roadway in Shajihai coal mine and its surrounding rock control. International Journal of Mining Science and Technology, Vol. 24, No. 6, pp. 853-858. https://doi.org/10.1016/j.ijmst.2014.10.019

Yue Z. W., Yang R. S., Yan Z. D., Zhang Y. H., Han P. F. (2011). Experimental study on stability of surrounding rock of coal roadway with compound roof and large cross section. Journal of China Coal Society, Vol. 36, No. S1, pp. 47-52.

Zhang N., Li B. Y., Li G. C., Qian D. Y., Yu X. Y. (2013). Inhomogeneous damage and sealing support of roadways through thin bedded coal-rock crossovers. Journal of Mining & Safety Engineering, Vol. 30, No. 1, pp. 1-6.

Zhang X. B., Zhang Y., Li C. Y., Liu C. A., Wang Z. F., Hao Z. J. (2011). Support technology of mining gateway with large section thin bedded roof. Coal Science and Technology, Vol. 39, No. 7, pp. 5-8, 56.