Principle Of Roof Bolting

In other words the bolts help the rock to strengthen and support itself.

Principle of roof bolting.

With continuing investigations and developments roof bolting today can in most cases successfully reinforce the mine roof in underground mining. Roof bolting in the coal mine duration. Furthermore rock bolting can be satisfactorily used to meet a variety of geological conditions and various support requirements. A fall where the bolts pulled out of the roof 18.

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. With regard to mechanical bolting two important parameters need more advanced improvements and study namely optimum design. Most important of all roof bolting is more effective and efficient because it is an active support method utilising the rock to support itself by applying internal reinforcing stresses. Some researchers have ascribed different support mechanisms to different types of roof bolts.

Resin and resin bolting information about resin and resin bolting. 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. Rockbolts also provide a holding function to loosened blocks and fractured rock. Trainers can use this manual as a resource for helping trainees learn understand and apply knowledge and skills.

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. The principle of longwall top coal caving ltcc duration. Fall of roof caused by excessive bolt spacing 20. Caterpillar global mining 1 403 622 views.

Guttering caused by failure of the roof in horizontal compression 21. Explores the installation of roof bolts. This trainer s guide is designed as a reference manual. Therefore an in depth study into the bolting elements that are currently being used n south african collieries was conducted.

In order to cope with the increasing use of roof bolts efforts should be made to maximize the safety and minimize the cost. A fall of roof with free hanging bolts 19. Roof geology and the reinforcement mechanism of roof bolts the principle objective of roof bolting is to help the rock mass support itself. Diagram illustrating the principle of a simple yet effective extensometer 23.