Objective
Destructive coal boring under heavy stresses "reacts" entailing a considerable amount of cuttings much more important than the theoretical volume of the bore, restricting the length of boreholes.
In some cases it is desirable to destress at long distance by boring.
In the framework of this research , a method of boring under strong constraints will be developed in view to allow this belief operations :
- modelling the phenomena of reactivity in coal boreholes
- determining the influence of a confinement pressure in them
- comparison of results to experimentations in disking cells in order to determine the drilling parameters
. modifying the mud circuit of a drilling machine after knowledge of the pressure and mud characteristics parameters
. underground tests to optimise the tool.
Topic(s)
Call for proposal
Data not availableFunding Scheme
CSC - Cost-sharing contractsCoordinator
57802 Freyming Merlebach Cedex
France