Rаdul V. Substantiation of parameters of preparation without the spurns of steep coal layers on a depth over thousand meters

Dissertation is devoted to the problems of technological parameters field preparation of steep seams on the ventilation horizons without leaving tape pillars at the depth over thousand meters , on the basis of the established laws of redistribution of stress-strain state of rocks around the ventilation drift, that allows to reduce the expenses on the maintenance of preparatory workings and operational losses of coal. In dissertation on the basis researches to set: intercommunication between the parameters of the field preparation and forming of areas of the promoted mountain pressure on neighbouring outburst dangerous layers. Developed and economic appraised technological to the chart of the field preparation steep layers without abandonment of pillars coal. Optimum distance is certain between the field drift and layer depending on time of his exploitation. Specified economic-mathematical model of determination of charges in support the field drift, taking into account the remoteness of him from a layer. Developed practical recommendations after the increase of firmness of seam venting drift at the field preparation of layer in transition of works on lower horizon. Мathematical modeling is carried out, which allowed to establish the convergence of the analytical and експериментальных results and confirm the validity of the conclusions. The expected annual economic effect from application of dissertation job performances on the average will make a 800 thousand of UAH on one area. Results of theoretical developments, mine researches and conclusions of dissertation used for development of normative documents of Ministry of coal industry of Ukraine and was found application on the mines of Central district of Donbass.