Hello i am working on a project. i need to design a roof bolt for a coal mine. inside a mine, after removing the coal, the immediate roof will sag and break. the immediate roof is a layer of rock such as sandstone. so in the model we have coal which is overlain by sandstone and shale. I will use a pretension bolt. the length of this bolt is usually 6-8 ft.
the model is 3D, first i will remove some elements to simulate an excavation (cutting coal), the bolt should be deactivated at this stage, then i will activate the bolt. is it right? please correct me if i am wrong.
the problem is the mine is so big and i need to install roof bolt in that big area, and the model is 3D. i am thinking of running a global model then run a sub-model to focus only on a small area of the mine.
Hence, i need some tips about how to simulate that roof bolt and if whether you think that sub-model is a good idea or not to overcome the size of that big problem.
Thanks.
the model is 3D, first i will remove some elements to simulate an excavation (cutting coal), the bolt should be deactivated at this stage, then i will activate the bolt. is it right? please correct me if i am wrong.
the problem is the mine is so big and i need to install roof bolt in that big area, and the model is 3D. i am thinking of running a global model then run a sub-model to focus only on a small area of the mine.
Hence, i need some tips about how to simulate that roof bolt and if whether you think that sub-model is a good idea or not to overcome the size of that big problem.
Thanks.