New Type of High-Strength Support in Deep Soft Rock Roadway

Abstract:

In order to control the deformation of large section surrounding rock in 700m level of the main drainage pumping station in the experimental mine, according to the reason for deformation and failure of the main drainage pumping station and material mechanics, fully-closed U-shaped support which used double welding I-steel bottom arch as the main structure was designed and the assembly and principles of support were described in detail, based on theoretical calculation and comparative analysis on the structure and mechanical properties of rectangular I-beam support, U-steel support, single I-beam arch support and double I-beam arch support. Based on the comparative analysis by numerical simulation, the rationality of the high strength support and the detailed support parameters were determined. It gets good effect in field application and ensures the long-term stability of the main drainage pumping station. The results show that: the double-layer I-beam 12^# can increase bending strength by about 7.5 times. Double trough splint device used in shoulder of the support has the advantages of high strength, greater rigidity, good pliability and stable working resistance.

• Periodical: Advanced Materials Research (Volumes 724-725)
• Pages: 1520-1525
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.724-725.1520
• Online since: August 2013
• Authors: Ji Cheng Feng, Hong Jiao Li, Zhi Chao Zhao, Wen Long Zhang
• Keywords: Deep, Double-Layer I-Beam, Numerical Simulation, Soft Rock

References

[1] Zhou Maochun, Zhou Xuebin, Wang Duochun. High strength and stable support technology of deep chamber of large section[J]. Coal mining. 2010; 15 (3): 62-64.

[2] Kang Hongpu, Wang Jinhua, Lin Jian. High prestressed strength support system and its application in deep roadways[J]. Journal of China Coal Society. 2007; 32 (12) :1234-1238.

[3] He Manchao, Li Guofeng, Liu Zhe, Cai Jian. Countermeasures Aiming at the Support for Crossing Roadway of Deeply Buried Soft Rocks in Xing'an Coal Mine[J]. Journal of Mining & Safety Engineering. 2007; 24(2): 128-131

[4] Li Yanqing, Chen Tonghu, Song Youliang, Wu Ranhong. Technical optimization and engineering practice of support in deep high stress soft rock roadway[J]. Mine Support. 2009; 23(1):23-27

[5] Luo Yong. Research on Backfill Technology with U-steel Support in Soft Rock Roadway in Deep Mine[J]. Chinese Quarterly of Mechanic. 2009; 9(3): 488-494.

[6] Du Bingshen. Application of ring support of roadway in high ground pressure in deep mine of thousands meters[J]. Hebei Coal. 2010; 4: 31-33.

[7] Liu Hongwen. Mechanics of Materials[M]. The Education Press,2004:138-143.

[8] Zhan Ping. Study on controlling mechanism and technology high stress failure roadway of surrounding rock[D]. Doctorate thesis. Beijing. China University of Mining and Technology (Beijing). 2012..

[9] Hou Chaojiong. Metal stents of roadway[M]. China Coal Industry Press.1989:72-77.

[10] Hou Chaojiong, Ma Nianjie. Ladder yieldable support of I-beam[J]. Coal Science and Technology. 1992; 1:24-26.