METHOD OF LOCATING SAFE AND HAZARDOUS ZONE IN CYCLIC EXCAVATION OF FACE-ADJOINING PART OF GAS-BEARING COAL SEAM

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to the case and can be used in the design of gas bearing coal seams. the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 - improved accuracy u043eu043fu0440u0435u0434u0435u043bu0435u043du0438u00a0 safe areas by integrating the u0432u0437u0430u0438u043cu043eu0441u0432u00a0u0437u0438 gas and u043du0430u043fu0440u00a0u0436u0435u043du043du043eu0433u043e u0441u043eu0441u0442u043eu00a0u043du0438u00a0 reservoir.in the face of the notch u0443u0433u043bu00a0 purification in 1 cycle, at the same time, u0437u0430u043cu0435u0440u00a0u044eu0442 level of acoustic emission (ae) and u0433u0430u0437u043eu0432u044bu0434u0435u043bu0435u043du0438u0435 (gv) of the u0437u0430u0431u043eu00a0 and u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 size l (j) and l (x) security noah discharge zones (u0431u0437u0440) ae and gv, respectively. then u0431u0443u0440u00a0u0442 u0448u043fu0443u0440u044b, u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 gv of u0448u043fu0443u0440u043eu0432 and counting the u0431u0437u0440. u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 maximum difference between l (j) and l (x) in the first round of donations.in subsequent cycles, the size u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 u0431u0437u0440 on ae and gv. if the difference is less than or equal to, the size of u0431u0437u0440 take u0441u0440u0435u0434u043du0435u0430u0440u0438u0444u043cu0435u0442u0438u0447u0435u0441u043au043eu0435 size between u0431u0437u0440 on ae and gv of u0437u0430u0431u043eu00a0. if the difference is more in the u0431u0443u0440u00a0u0442 u0448u043fu0443u0440 and u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 gv of u0448u043fu0443u0440u0430 and it expects the size of the discharge zones.in / l - l (j) / * 98 / 2 and / l - l (x) / * 98 / 2 plot of u043eu0442u043du043eu0441u00a0u0442 to u0441u0443u0444u043bu00a0u0440u043eu043eu043fu0430u0441u043du043eu0439 zone. in / l - l (x) / * 98 / 2 and / l - l (j) * 98 / 2 plot view zone, non-uniform over 500 different wheel models x kam u0443u0433u043bu00a0 and recipient formations. in / l - l (j) / * 98 / 2 and / l - l (x) / * 98 / 2 plot of u043eu0442u043du043eu0441u00a0u0442 to the geological u043du0430u0440u0443u0448u0435u043du0438u00a0. in this u0437u043du0430u0447u0435u043du0438u00a0 all u0440u0430u0437u043du043eu0441u0442u0435u0439 take on zero value.