Research and Application of Efficient Undercover and Filling Technology Along the Top Tunneling Roadway

Zelin Zhu

doi:10.54097/cpzkbw43

Authors

Zelin Zhu

DOI:

https://doi.org/10.54097/cpzkbw43

Keywords:

Ultra-high roadway, excavation along the top, ratio study, surrounding rock control.

Abstract

In order to solve the problems of large height of the roadway along the top of the Jiulishan 1613 working face, the difficulty of roof maintenance, the low resource recovery rate and the difficulty of replacing the working face, the bottom coal recovery work was carried out in the top excavation roadway in advance, and the top bag filling technology was used to maintain the stability of the surrounding rock of the roadway. Through theoretical analysis, the secondary support parameters and the required strength of the top backfill were determined. According to the mechanical properties of high-water materials at different temperatures, uniaxial and triaxial experiments were used to determine the optimal water-cement ratio. The support effect is verified by numerical simulation and industrial test. The results show that the final setting strength of the top filling body shall not be less than 1.68MPa, and the temperature has little influence on the mechanical properties of the high-water material; the maximum subsidence of the roof of the roadway after the top filling is 98mm and 170 mm, respectively, and the two gangs move closer to 130mm and 210mm, respectively, and the synergistic control system formed after filling has a significant effect, increasing the income of more than 70,000 tons of coal, and the direct economic benefit is 75 million yuan, and meeting the requirements of safe mining of the working face. It provides a reference for the control of surrounding rock in similar mine roadways.

Downloads

Download data is not yet available.

References

[1] Kang Hongpu, Fan Mingjian, Gao Fuqiang, et al. Chinese Journal of Rock Mechanics and Engineering, 2015, 34 (11): 2227- 2241.

[2] HE Manchao, XIE Heping, PENG Suping, et al. Chinese Journal of Rock Mechanics and Engineering,2005,24(16) : 2803-2813.

[3] Nie Baisheng, Lu Hongqi, Li Xiangchun, et al. Journal of China Coal Society,2015,40(4):754-759.).

[4] WANG Zhe. Study on the Appearance Law of Mining Pressure in the Comprehensive Release of Ultra-long Working Face[J]. Safety in Coal Mines, 2017, 48(2): 188-191

[5] WANG Yuhe, CHEN Wenguo, ZHANG Pu, et al. Simulation study on the reasonable position of the final mining line under the influence of mining[J]. Coal Engineering, 2016, 48(5): 65-67,70

[6] Xie J, Xu J, Wang F. Mining-induced stress distribution of the working face in a kilometer-deep coal mine-a case study in Tangshan coal mine-a case study in Tangshan coal mine. Journal of Geophysics and Engineering, 2018, 15 (5): 2060- 70

[7] FANG Xinqiu,XU Ruiqiang,ZHAO Junjie. Research on the instability mechanism and control of triangular coal in goaf fully mechanized working face[J].Journal of China University of Mining and Technology,2011,40(5):678-683.

[8] B Yu, J Zhao, T J Kuang. In situ investigations into overburden failures of a super-thick coal seam for longwall top coal caving[J]. International Journal of Rock Mechanics and Mining Sciences, 2015, 8(78). 155-162.

[9] J Zhang, L Liu. Asymmetrical Support Technology for Dynamic Pressure Roadway: A Case Study from Guotun Coal Mine in China[J]. Geotechnical and Geological Engineering, 2018, 37(2):823-832.

[10] S C Li, Q Wang, H T Wang. Model test study on surrounding rock deformation and failure mechanisms of deep roadways with thick top coal[J]. Tunnelling and Underground Space Technology incorporating Trenchless Technology Research, 2015, 9(47). 153-167.

[11] Li Jixing, Xu Lei, Jiang Hongjun. Stability Mechanism and Support Technology of Jugao Roadway[J]. Safety in Coal Mines, 2012, 43(10): 60-63.

[12] CHEN Qiuyu. Research on filling materials and filling technology of 3122 fully mechanized discharge surface empty roadway of Jingxin Coal Industry[D]. China University of Mining and Technology, 2018.

[13] HE Xiangning, CHEN Yong, QIN Zhengyuan. Research and application of hollow roadway technology in fully mechanized working face[J]. Coal Science and Technology, 2017, 45(6): 124-130

[14] Wang Cheng, Ding Ziwen, Xiong Zuqiang, et al. Deformation law and control technology of surrounding rock of large-section dynamic pressure mining roadway[J].China Safety Science Journal, 2018, 28(5): 135-140.

[15] Xiong Zuqiang,FAN Chuanhe. Coal Science and Technology, 2015, 43(5): 13-16.)

[16] SUN Ruyi. Research on bag filling technology at the top of ultra-high mining roadway in fully mechanized working face[D].Jiaozuo:Henan Polytechnic University, 2020.

[17] X D Zhang, D Y X. Support Technology of Ultra-high Roadway in Thick Coal Seam[J]. Information Technology Journal,2013,12(17):4095-4100.

[18] Hu Fangjian, Fang Yongjun. 107 Shandong Coal Science & Technology,2011,21(04):88+90.

[19] ZHANG Baolin. Shandong Coal Science & Technology, 2020, 26(01): 44-45.

[20] Cao Qijia, Chen Yong, Song Kun. Research and application of high-water material filling technology for deep working face through empty roadway[J]. Coal Technology, 2017,36(6):55-57.

[21] JIA Junfei. Research on the instability mechanism of surrounding rock and top bag filling control of ultra-high roadway in extremely soft and thick coal seam[D].China University of Mining and Technology,2022.