Stability Control of Deep Coal Roadway under the Pressure Relief Effect of Adjacent Roadway with Large Deformation: A Case Study

Houqiang Yang, Nong Zhang, Changliang Han, Changlun Sun, Guanghui Song, Yuantian Sun and Kai Sun
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Houqiang Yang: Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, University of Mining and Technology, Xuzhou 221116, China
Nong Zhang: Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, University of Mining and Technology, Xuzhou 221116, China
Changliang Han: Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, University of Mining and Technology, Xuzhou 221116, China
Changlun Sun: Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, University of Mining and Technology, Xuzhou 221116, China
Guanghui Song: Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, University of Mining and Technology, Xuzhou 221116, China
Yuantian Sun: Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, University of Mining and Technology, Xuzhou 221116, China
Kai Sun: Zhongtian Hechuang Energy Co. Ltd., Ordos 017020, China

Sustainability, 2021, vol. 13, issue 8, 1-14

Abstract: High-efficiency maintenance and control of the deep coal roadway surrounding rock stability is a reliable guarantee for sustainable development of a coal mine. However, it is difficult to control the stability of a roadway that locates near a roadway with large deformation. With return air roadway 21201 (RAR 21201) in Hulusu coal mine as the research background, in situ investigation, theoretical analysis, numerical simulation, and engineering practice were carried out to study pressure relief effect on the surrounding rock after the severe deformation of the roadway. Besides, the feasibility of excavating a new roadway near this damaged one by means of pressure relief effect is also discussed. Results showed that after the strong mining roadway suffered huge loose deformation, the space inside shrank so violently that surrounding rock released high stress to a large extent, which formed certain pressure relief effect on the rock. Through excavating a new roadway near this deformed one, the new roadway could obtain a relative low stress environment with the help of the pressure relief effect, which is beneficial for maintenance and control of itself. Equal row spacing double-bearing ring support technology is proposed and carried out. Engineering practice indicates that the new excavated roadway escaped from possible separation fracture in the roof anchoring range, and the surrounding rock deformation of the new roadway is well controlled, which verifies the pressure relief effect mentioned. This paper provides a reference for scientific mining under the condition of deep buried and high stress mining in western China.

Keywords: stability control; deep coal roadway; deformation; pressure relief; coal pillar; surrounding rock control; bolt support (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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