The paper describes mechacal properties and deformation features of shaft adjoining rocks in gliding tectonic ground and presents the shaft-supporting procedure of smooth-wall cushion blasting,preliminary bolting and ...The paper describes mechacal properties and deformation features of shaft adjoining rocks in gliding tectonic ground and presents the shaft-supporting procedure of smooth-wall cushion blasting,preliminary bolting and shotcreting and pouring reioforced coocrete liner in one-time-whole-section on the basis of adjoining rock deformations measured dynamically site. Field measurements of the pressur exerted on shaft wall show that this supponing procedare has enough safety reserve to meet the safety requirements in mining production.展开更多
The present study is focused on the roadway support in high stress composite soft rock. This paper expounds the two main features of roadway in soft rock, i.e., great deformation of surrounding rock and remarkable rhe...The present study is focused on the roadway support in high stress composite soft rock. This paper expounds the two main features of roadway in soft rock, i.e., great deformation of surrounding rock and remarkable rheological deformation. Furthermore, on the basis of analyzing physico chemical component of surrounding rock and the situation of the damaged roadway, the method of adopting strong bolting and shotcreting mesh for the primary support, bolting and grouting for the secondary support is put forward in light of the on the spot investigation of stress tension, mechanical parameter and engineering geology. The application reveals the method facilitates the continuation of west main roadway and the restoration of shaft station and chambers. Consequently, better techno economic results have been achieved.展开更多
文摘The paper describes mechacal properties and deformation features of shaft adjoining rocks in gliding tectonic ground and presents the shaft-supporting procedure of smooth-wall cushion blasting,preliminary bolting and shotcreting and pouring reioforced coocrete liner in one-time-whole-section on the basis of adjoining rock deformations measured dynamically site. Field measurements of the pressur exerted on shaft wall show that this supponing procedare has enough safety reserve to meet the safety requirements in mining production.
文摘The present study is focused on the roadway support in high stress composite soft rock. This paper expounds the two main features of roadway in soft rock, i.e., great deformation of surrounding rock and remarkable rheological deformation. Furthermore, on the basis of analyzing physico chemical component of surrounding rock and the situation of the damaged roadway, the method of adopting strong bolting and shotcreting mesh for the primary support, bolting and grouting for the secondary support is put forward in light of the on the spot investigation of stress tension, mechanical parameter and engineering geology. The application reveals the method facilitates the continuation of west main roadway and the restoration of shaft station and chambers. Consequently, better techno economic results have been achieved.
