A Simulation Experimental Study on the Advance Support Mechanism of a Roadway Used with the Longwall Coal Mining Method

Hui Liu; Zhenhua Jiang; Wansheng Chen; Fei Chen; Fenglin Ma; Donghao Li; Zhaoyang Liu; Hongke Gao

doi:10.3390/en15041366

Energies (Feb 2022)

A Simulation Experimental Study on the Advance Support Mechanism of a Roadway Used with the Longwall Coal Mining Method

Hui Liu,
Zhenhua Jiang,
Wansheng Chen,
Fei Chen,
Fenglin Ma,
Donghao Li,
Zhaoyang Liu,
Hongke Gao

Affiliations

Hui Liu: Shenmu Ningtiaota Coal Mining Company Ltd., Shaanxi Coal and Chemical Industry Group Company Ltd., Yulin 719300, China
Zhenhua Jiang: Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
Wansheng Chen: Shenmu Ningtiaota Coal Mining Company Ltd., Shaanxi Coal and Chemical Industry Group Company Ltd., Yulin 719300, China
Fei Chen: Shenmu Ningtiaota Coal Mining Company Ltd., Shaanxi Coal and Chemical Industry Group Company Ltd., Yulin 719300, China
Fenglin Ma: Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
Donghao Li: Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
Zhaoyang Liu: Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
Hongke Gao: Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China

DOI: https://doi.org/10.3390/en15041366
Journal volume & issue: Vol. 15, no. 4
p. 1366

Abstract

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Aiming to advance a support problem for roadways used with the longwall coal mining method, the S1202 working face of the Ningtiaota Coal Mine is taken as the engineering background. The monitoring and analysis of bolt force, anchor cable force and surrounding rock deformation of two types of roadways within the whole advance pressure influence range are carried out in the present paper. Based on this, a numerical calculation model consistent with the field is established, and numerical comparison tests under different influencing factors are carried out. The rationality of the numerical test results is verified by using the field monitoring data. At the same time, quantitative evaluation indexes, such as characterization deformation, are established, and the deformation law of roadways surrounding rocks under different advance passive support forces is analyzed. The advance support mechanism of the roadway used with the longwall coal mining method is clarified. The test shows that under the condition of no advance passive support, the maximum characteristic deformation of surrounding rock in the haulage roadway and ventilation roadway is 7.1 cm and 10.1 cm, respectively. The above surrounding rock deformation still meets the requirements of on-site safety production. The research results can provide experimental support for the advance support parameters of the roadway used with the longwall coal mining method.

Published in Energies

ISSN: 1996-1073 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology
Website: http://www.mdpi.com/journal/energies

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