FIELD: testing equipment.
SUBSTANCE: invention relates to a method for determining the reference parameters of the transitional support for a mining face of a mixed type using a bookmark and a mechanized support. Method comprises the following steps: determining the total length of the working face and the length of the section of the bookmark according to the requirements for ensuring the productivity of coal mining in the cleared bottom of the mixed type and the capacity of the working surface of the section of the bookmark. Creating a numerical model of bookmarking and mechanized mining using 3DEC discrete element software. Modeling and calculating the height of the collapse of the roof of the transition section and the voltage range of the transition section when the volume of the laying φ of the stretched area changes. Getting the functional relationship between the volume of the bookmark and the height of the collapse and the functional relationship between the volume of the bookmark and the voltage range of the transition section based on the data of numerical modeling and calculation with curve fitting taking into account the correlation coefficient R2. Determination of bearing capacity of the support of the transition section. Determination of the voltage range of the transition section of the working face in accordance with the desired volume of bookmarks in practical use and calculation of the number of supports of the transition section.
EFFECT: technical result consists in increasing the safety for the working face of the mixed type when using the bookmark and the mechanized support, due to the smooth transition from the support by the bookmark to the mechanized support for the working face of the mixed type.
1 cl, 6 dwg, 2 tbl
