METHOD OF ROOF CONTROL IN MINING FLAT COAL SEAMS

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to the case and u043fu043eu0437u0432u043eu043bu00a0u0435u0442 increase the loading capacity of the u0431u0443u0442u043eu0432u043eu0439 posed by the explosion and ensure the safety of u0432u0435u0434u0435u043du0438u00a0 mountain slave from the station. easy coal train of long branches. a u043fu0440u043eu0432u043eu0434u00a0u0442 with u043fu043eu0434u0440u044bu0432u043au043eu0439 soil species (p).from the faces parallel to line of control u0437u0430u0431u043eu00a0 to approach p is u0431u0443u0440u00a0u0442 primary and additional wells (c) 2 and 3. after the passage of control u0437u0430u0431u043eu00a0 along its lines are flat u043fu0440u043eu0442u00a0u0436u0435u043du043du044bu0439 u043fu043du0435u0432u043cu043eu0431u0430u043bu043bu043eu043d (ap) 4. u0440u0430u0441u043fu0438u0440u0430u044eu0442 him between the canopy and the p. then u043fu0440u043eu0438u0437u0432u043eu0434u00a0u0442 consistent explodium primary and subsidiary. after u0432u0437u0440u044bu0432u0430u043du0438u00a0 core to form a u043fu043eu0440u043eu0434u043du0443u044e pillow 5.and u0432u0437u0440u044bu0432u0430u043du0438u0435u043c further with u043fu0440u043eu0438u0437u0432u043eu0434u00a0u0442 directed displacement type cushion towards the ap, the ap u0434u0435u0444u043eu0440u043cu0438u0440u0443u0435u0442u0441u00a0, u043eu0441u0442u0430u043du0430u0432u043bu0438u0432u0430u00a0 u043bu0435u0442u00a0u0449u0443u044e mass of rocks, and ha sith blast. then, under the action of internal elastic force which restores the original shape and, at the same time, u0443u043fu043bu043eu0442u043du00a0u0435u0442 u043fu043eu0440u043eu0434u043du0443u044e lane. 3). yu