ABSTRACT:

There were many small and medium coal mines in South China, and its geological conditions was very complex, so it could often found that there have large deformations during application in these coal mines and become very difficult to support. In view of the roadway deformation and control issues under complicated geological conditions, several mining area, such as Qujiang Coal Mine and Baise coal mines, geological conditions, roadway deformation characteristics of coal mines and outstanding problems of roadway support after in South China were summarized; and a series of field investigations, industrial test and supporting design research were carried out. According to the deformation characteristics of roadway surrounding rock in typical mines, industrial test of control technologies in high stress and large deformation rock, small coal pillar roadway and soft inflating half coal roadway were respectively illustrated. This study could provide theoretical and practical support in control technology for the same kind roadway, and it was of great significance to promote the development of science and technology of coal mines in South China.

1 INTRODUCTION

Compared to large coal mines in North mine, the supporting technology of soft rock roadway in South mine in china was relatively backward, and it was mainly include the following aspects: the design was not reasonable, supporting form was simple, the strength of supporting materials was low and the construction quality was poor. Moreover, all of these did not get enough attention of scientific research for a long time. In recent years, Hunan University of Science and Technology had temped up with many coal mines comprehensively, inventing the "pre-stressing force and large stiffness truss cable beam" as the comprehensive control core measures, and the high resistance to pressure release and high strength supporting technology with high strength bolt, strong anchor, and grouting. These techniques were used in the field, and its effect was obvious. The results can provide theoretical and practical support in control technology for the same kind of roadway, and it was of great significance to promote the development of science and technology of coal mines in South China.

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