The conditional comparative assessment of the methods of destruction does not pursue the goal of highlighting the absolute advantages of any one of them. This would contradict the specific features of mining. But she could help, as it seems to us, to answer questions about which of the existing methods of destruction is already better than others to meet the requirements of future technology, to improve the existing methods, first of all, it should be focused on and on the basis of which methods of destruction is advisable to create combined methods in order to combine their positive qualities.
The specific energy intensity in most cases indicates the degree of perfection of the destruction process, t. e. to the degree of use of energy directly to the separation of coal from the array, and not on the expenditure of energy to re -endive coal, on elastic deformation, heating and abrasion of coal and instrument, and other non -prolonged costs.
The value of the specific energy intensity of destruction is not the same in the characteristics of the mechanical and hydraulic, electrophysical and drilling methods. It must be borne in mind that a comparison of the numerical values of specific energy intensity even within the same method is relative, since it is unlikely to repeat the conditions for testing of various machines or the use of various destruction methods.
For mechanical methods of destruction, the specific energy intensity is of particular importance, since the productivity of a mining machine largely depends on its value. This is due to the fact that a number of factors limitingly affects the power of the modern slaughter machine: the size of the engines that should be within the limits allowed by the volume of the bottomhole space, the strength of the gear ratio, the conditions of the energy sewage to the engine, etc. In relation to combines g. M. Dobrov indicates that “any significant decrease in the specific energy intensity of coal seizure expands the possibilities of increasing the productivity of combines and opens up rich prospects for creating small -sized, simple and lighter cars”.
