Разработка мощного пологого пласта с выпуском угля подкровельной толщи роботизированным комплексом

Abstract

Introduction. When developing coal deposits using underground method, the greatest success was achieved for the seams with the thickness of up to 7 m by means of complex mechanization in one layer. The productivity of a cleared face reaches 6–8 thousand tons per day. A method of coal extraction from the top coal layer is used to mine seams of greater thickness. The limiting factor is the inability to control of the extraction process and, as a result, significant operational losses. Objective. The research aims to develop promising technologies for efficient and safe mining of thick flat coal seams using a robotic complex with controlled extraction from the top coal layer. Methods. The research is based on the analogy method. Results. By closing the gates installed on the extended sides of the line conveyor sections during the operation of the coal cutterloader and opening them during the release of coal, penetration of the loosened coal into the “pockets” of the support sections is eliminated. This reduces the operational loss of coal, the likelihood of “floating” sections of the support, as well as risks of emergencies. Due to the presence of an additional bunker on the side of the mined-out space, the coal from the top layer is collected, temporarily withheld, and then gravity fed into the outlet opening. Elimination of the advance preparation of the top coal layer in the area above the planned break-down chamber prevents man-induced discontinuities inside the rock mass above the breakdown chamber, which increases its stability. Construction of the break-down chamber with an inclination against the working face provides a sequential introduction of the support sections into the break-down chamber, one at a time, which allows timely preparation and release of coal.