Regarding the yielding bolt structure to support the roadway driven in the soft and weak rock mass

Abstract

Roadway support excavated in soft rock, necessary to use a structure that deforms with the surrounding rock. The results of the paper shown that the support theory when excavated roadway in soft rock with large deformation is to use support structure that has both certain hardness and softness, also from the tensile test results shows with a load of about 18 tons, the deformation of the bolt is 8mm, while the yielding bolt structure value of about 30 mm. In addition, the paper also put forward some analysis of the conditions for applying yielding bolt structure support for excavated of soft rock roadway in Quang Ninh coal mine.