Principle Of Roof Bolting

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.

Principle of roof 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. 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. Diagram illustrating the principle of a simple yet effective extensometer 23. With continuing investigations and developments roof bolting today can in most cases successfully reinforce the mine roof in underground mining.

In order to cope with the increasing use of roof bolts efforts should be made to maximize the safety and minimize the cost. Explores the installation of roof bolts. The purpose is to offer information and examples to skills trainers to assist them in structuring training for new operators of walk thru roof bolting machines. Some researchers have ascribed different support mechanisms to different types of roof bolts.

Roof geology and the reinforcement mechanism of roof bolts the principle objective of roof bolting is to help the rock mass support itself. Guttering caused by failure of the roof in horizontal compression 21. The principle of longwall top coal caving ltcc duration. Trainers can use this manual as a resource for helping trainees learn understand and apply knowledge and skills.

Roof bolting in the coal mine duration. With regard to mechanical bolting two important parameters need more advanced improvements and study namely optimum design. This trainer s guide is designed as a reference manual. Caterpillar global mining 1 403 622 views.

Scott cottrell 10 512 views. A fall where the bolts pulled out of the roof 18. Fall of roof caused by excessive bolt spacing 20. Therefore an in depth study into the bolting elements that are currently being used n south african collieries was conducted.

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. The essential function of bolting is to keep the fractured rock together to form a pressure arch around the opened space. A fall of roof with free hanging bolts 19. Rockbolts also provide a holding function to loosened blocks and fractured rock.