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Support technology of deep roadway under high stress and its application

International Journal of Mining Science and Technology 2016年第5期26卷 787-793页

作者： Cao Rihong Cao Ping Lin Hang School of Resources and Safety Engineering Central South University Changsha 410083 China State Key Laboratory of Coal Resources and Safety Mining School of Mines China University of Mining ＆ Technology Xuzhou 221116 China

Roadway instability has been a major concern in the fields of mining engineering. This paper aims to provide practical and efficient strategy to support the roadways under high in-situ stress. A case study on the stability of deep roadways was carried out in an underground mine in Gansu province, China. Currently,the surrounding rock strata is extremely fractured, which results in a series of engineering disasters, such as side wall collapse and severe floor heave in the past decades. Aiming to solve these problems, an improved support method was proposed, which includes optimal bolt parameters and arrangement, floor beam layout by grooving, and full length grouting. Based on the modeling results by FLAC3D, the new support method is much better than the current one in terms of preventing the large deformation of surrounding rock and restricting the development of plastic zones. For implementation and verification, field experiments, along with deformation monitoring, were conducted in the 958 level roadway of Mining II areas. The results show that the improved support can significantly reduce surrounding rock deformation, avoid frequent repair, and maintain the long-term stability of the roadway. Compared to the original support, the new support method can greatly save investment of mines, and has good application value and popularization value.

关键词： Deep roadway floor heave High stress Support Steel beam

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Analysis of soft rock roadway deformation mechanism in Zhangshuanglou Mine

引用

Journal of Coal Science & Engineering(China) 2003年第1期9卷 38-41页

作者：顾士亮 School of Energy Science and Engineering China University of Mining and Technology

On basis of ground stress surveying and analysis of physical nature and mechanics character of rock, the deformation mechanism of west main roadway in Zhangshuanglou Mine is studied. It is put forward that engineering mechanics nature, infiltration of water and concentrated stress on pillar are the main factors to affect stability of the west main roadway. The overall thinking used to restore the roadway is raised.

关键词： soft rock roadway deformation mechanism floor heave

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