New Technology and Mechanism Study of the Bearing Enhancement of Broken Rock Zone in Underground Rock Roadway

Abstract:

Treating surrounding rock as absolutely loose mass helps to determine positions of the four key reinforced points in roadway, in other words, they are juncture locations between 45 degrees angle directions of two arch haunches and two footwalls. Surrounding rock deformation can be effectively controlled with the help of reinforcement on key reinforced points, furthermore, it is possible to save lots of supporting materials, in short, it is a very effect way. New technology proposed in this paper what is about stable augmentation has deeply unearthed important effect of anchor in floor of roadway, it argues that anchor in floor has quadruplex efficacies: transferable effect of surrounding rock stress, displacement boundary effect, decreasing equivalent stress of basic angle area and the inverted wedge effect, so it can suppress floor heave effectively, and this lays a solid foundation for roadway stability. Article deeply analyzed basic mechanism about deformation of roadway under loading, exposed essentiality of roadway support, and provided important theoretical basis for floor heave control emerged more and more frequently in deep mine roadway. Key words: broken rock zone, bolt support, floor heave, equivalent stress

• Periodical: Applied Mechanics and Materials (Volume 345)
• Pages: 447-454
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.345.447
• Online since: August 2013
• Authors: Peng Wei Hao, Hai Long Dong, Zhao Hui Liu, Jing Pei Li, Lai Wang Jing
• Keywords: Bolt Support, Broken Rock Zone, Equivalent Stress, Floor Heave

References

[1] Chaojiong Hou, Lisheng Guo, Panfeng Gou, etc. Coal roadway bolting [M]. Xuzhou: China University of Mining And Technology Press, (1999).

[2] Jiadong Liu, Lu Wen, etc. Study on Numerical Simulation of Stress Distribution Rules of Arched Tunnel Surrounding Rock[J]. Express Information of Mining Industry, 2008, 24(3): 22-25.

[3] Haitao Sun. Similar Simulation Verification of Shearing Slip Model of Overlying Composite Stratum in Stope[J]. Mining Safety & Environmental Protection, 2009, 36(6): 1-3.

[4] Dongyan Liu, Haitao Sun, Zhang Yan. A model of shear slipping of overlying strata under mining disturbance[J]. Rock and Soil Mechanics, 2010, 31(2): 609-614.

[5] Yunzhang Rao, Xingguo Wu, Luo Huan. Ground Pressure Formation Mechanism of Mining Tunnels and Research on Stress Distribution [J]. COPPER ENGINEERING, 2010, 1: 16-20.

[6] Kaihua Zeng, Chunguang Wang, Guilian Wang, Shengbin Yang. Study on the Shear Resistance Characteristics of Floor Anchor[J]. Metal Mine, 2009, 2: 63-66.

[7] Pengwei Hao. Numerical Simulation of Rock Bolting in Soft Rock That is Heavily Stressed[M]. Anhui University of Science and Technology, 2006. 6.

[8] Siming Kao. Finite Element Analysis of Rock bolting[M]. Anhui University of Science and Technology, 2008. 6.

[9] Fusheng Jin, Guohu Jiang. Study on Floor Heave Mechanism and Control Countermeasures of Deep Roadway. Modern Mining, 2009, 5(5): 72-74.

[10] Guangcheng Liu. Deep Mine Soft Rock Roadway Floor Heave Mechanism Analysis and Strengthening Governance Technology Research[M]. Anhui University of Science and Technology, 2009. 6.

[11] Yanjun Liu. Application of Combined Support Technolog in High Stress Roadway with Pucking and Distortion[J]. Coal Technolog, 2010, 29(8): 79-80.

[12] Yongqiang Xia. Supporting Practice on Rock Roadway Drivage in Hebi No. 8 Coal Mine[J]. ZHONGZHOU COAL, 2010, 9: 65-66.

[13] Weimin Zhang, Zhihong Xie, Wenliang Sun. Application and creation of bolt net cable shotcreting support technology in soft rock roadwaySupporting[J]. Shandong Coal Science and Technology, 2008, 3: 77-78.