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Submitted by generalized experience entry longwall into pre- driven recovery room (PDRR) in foreign and Russian mine.Submitted by research characteristic state parameters of the roof at failed entry. Give a classification of roof collapse at the entrance longwall into PDRR.On the example of longwall panel 5а-10-18 mine Raspadskaya reviewed formation process of stress-strain condition in area for PDRR. Has been modeled process of entry longwall into PDRR in the conditions of heavy roof. Determine the expected load on the anchor and standing support, installed in the PDRR. Assessed the load on the longwall shield. When calculating the loads was taken into account the following parameters: width pre-driven recovery room, number of standing support in the PDRR and especially its placement, the rate of entry longwall into PDRR.

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A research of rock pressure manifestations in the seam workings of seam 52 in “V. D. Yalevsky” mine is presented. It is shown that the inspected development workings advanced in a thick seam have a number of peculiarities determining the urgency of their stability research. It is noted that the researches are carried out in the workings subjected to coal extraction influence, as well as in the workings not subjected to that influence. A brief description of the research method including a visual examination of the mine workings and their support elements, instrumental studies of the border rock massif and the theoretical justification of the parameters of rock pressure are given. The following patterns: rock pressure manifestations mostly in the workings sidewalls, a positive time dynamics of rock pressure manifestations, and the increased intensity of manifestations in the workings roof after coal extracting in the face were recorded. The theoretical justification of rock pressure manifestations and the interpretation of the results of instrumental researches are given.

The analysis of existing heating systems for greenhouse complexes was carried out, their advantages and disadvantages were identified. Tasks have been set for the use of structures based on an energy-efficient surface-distributed method of heating (heating) using plate and volumetric multi-electrode composite electric heaters. A complex for determining the heat balance in the greenhouse has been carried out, inflows and outflows of heat have been identified. The possibility of using heat influx from a plate multi-electrode composite electric heater is presented, which makes it possible to normalize the microclimate in the greenhouse during the cold periods of the year. Keywords: TEMPERATURE HEAT SUPPLY, HEATING, GREENHOUSE, ENERGY BALANCE, HEAT BALANCE, HEAT TRANSFER, ENERGY SAVING