Principle Of Roof Bolting

Evaluation of roof bolting systems in south africa 6 1 introduction one other important consideration in determining the performance of a support system as a whole is the bolting components that are used in the design.

Principle of roof bolting. Trainers can use this manual as a resource for helping trainees learn understand and apply knowledge and skills. Diagram illustrating the principle of a simple yet effective extensometer 23. Resin and resin bolting information about resin and resin bolting. The principle of longwall top coal caving ltcc duration.

Guttering caused by failure of the roof in horizontal compression 21. A fall of roof with free hanging bolts 19. With regard to mechanical bolting two important parameters need more advanced improvements and study namely optimum design. Explores the installation of roof bolts.

Caterpillar global mining 1 403 622 views. Roof bolting in the coal mine duration. Scaling and bolting or shotcrete ground conditions that create a hazard to persons shall be taken down or supported before other work or travel is permitted in the affected area. In other words the bolts help the rock to strengthen and support itself.

Furthermore rock bolting can be satisfactorily used to meet a variety of geological conditions and various support requirements. This trainer s guide is designed as a reference manual. The essential function of bolting is to keep the fractured rock together to form a pressure arch around the opened space. Roof geology and the reinforcement mechanism of roof bolts the principle objective of roof bolting is to help the rock mass support itself.

Fall of roof caused by excessive bolt spacing 20. The installation of primary roof bolting as part of the roadway development operation is the most obvious pro active strata control process that is available to mining operations. Rockbolts also provide a holding function to loosened blocks and fractured rock. With continuing investigations and developments roof bolting today can in most cases successfully reinforce the mine roof in underground mining.

Some researchers have ascribed different support mechanisms to different types of roof bolts. A fall where the bolts pulled out of the roof 18. Therefore an in depth study into the bolting elements that are currently being used n south african collieries was conducted. Scott cottrell 10 512 views.