Evolution of Interior and Exterior Bearing Structures of the Deep-Soft-Rock Roadway: From Theory to Field Test in the Pingdingshan Mining Area

Qingxian Huang, Xufeng Wang, Xuyang Chen, Dongdong Qin and Zechao Chang
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Qingxian Huang: School of Mines, the Jiangsu Engineering Laboratory of Mining-Induced Seismicity Monitoring, China University of Mining and Technology, Xuzhou 221116, China
Xufeng Wang: School of Mines, the Jiangsu Engineering Laboratory of Mining-Induced Seismicity Monitoring, China University of Mining and Technology, Xuzhou 221116, China
Xuyang Chen: School of Mines, the Jiangsu Engineering Laboratory of Mining-Induced Seismicity Monitoring, China University of Mining and Technology, Xuzhou 221116, China
Dongdong Qin: School of Mines, the Jiangsu Engineering Laboratory of Mining-Induced Seismicity Monitoring, China University of Mining and Technology, Xuzhou 221116, China
Zechao Chang: School of Mines, the Jiangsu Engineering Laboratory of Mining-Induced Seismicity Monitoring, China University of Mining and Technology, Xuzhou 221116, China

Energies, 2020, vol. 13, issue 17, 1-19

Abstract: Pingdingshan mining area is one of the typical deep mining areas in China, and most of the mines in this area are troubled by the difficulties of the deep-soft-rock roadway support. Based on the concept of synergistic interactions of the interior and exterior bearing structure of the surrounding rock and, considering the specific geological conditions of the research site, we establish the mechanical model of the interior and exterior bearing structure of the roadway. Based on numerical simulation, we reveal the influence of main factors, such as support strength and mechanical characteristics, of surrounding rock on the distribution and evolution of the interior and exterior bearing structure. We found that increasing the support strength and mechanical parameters of surrounding rock can make the exterior bearing structure close to the roadway enhance the bearing characteristics of the interior and exterior bearing structure and improve the roadway stability. The distribution characteristics of the interior and exterior bearing structure of the roadway under six different support strengths and six different grouting parameters were systematically investigated by field measurements. According to the field test results, an effective strategy for controlling the deep-soft-rock roadway is proposed, which provides a good reference for surrounding rock control of the deep-soft-rock roadway in the Pingdingshan mining area and mines with similar mining conditions.

Keywords: deep-soft-rock roadway; surrounding rock; bearing structure; field test and observation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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