COAL BEDS OUTBURST HAZARD SPECTRAL-ACOUSTIC FORECASTING METHOD Russian patent published in 2018 - IPC E21F5/00 E21C39/00 

FIELD: mining.

SUBSTANCE: invention relates to the mining industry and can be used to predict dynamic phenomena such as coal and gas sudden release, rock bump and the like. Disclosed is the coal beds outburst hazard spectral-acoustic forecasting method, including the generated by the working mechanism broadband acoustic signal in the mountain mass amplitude continuous automatic measurement, the signal analog-to-digital conversion, experimental samples formation from the analog-to-digital conversion samples sequence, fast Fourier transform procedure implementation with them and the spectral components (harmonics) amplitudes discrete series determination, their averaging over time. At that, determining the outburst hazard index R_t current value according to the formula R_t=(S_max,t-1.8)(g_max,t-a), where S_max,t and g_max,t are the drift fines output current maximum value and the gassing initial velocity maximum value, respectively, during the control holes drilling, parameter a is taken equal to 5 for the Vorkuta coal field, it is taken equal to 4 for the remaining fields and deposits of the eastern regions of Russia. Then determining the formation controlled area forecasting instrumental procedure relative outburst hazard coefficient R_r.o.h. according to the formula R_r.o.h.=R_t/b, where the b parameter is taken equal to 21 for the Vorkuta coal field, take equal to 6 for other fields and deposits in the eastern regions of Russia. Determining the operating mechanism noises spectral harmonics amplitudes discrete series median M_0min minimum reference value by the formula M_0min=n_min⋅Δf, where Δf is the interval between adjacent harmonics, finding the operating mining equipment noise spectral components amplitudes discrete series median critical value using the formula M_cr=M_0min/R_r.o.h. Measuring the noise spectral components amplitudes discrete series median M_t current value and comparing it with the M_cr critical value, with M_t≥M_cr formation zone is classified as the outburst hazardous, with M_t<M_cr formation zone is classified as the non-hazardous.

EFFECT: increase in the coal beds mining outburst hazard current forecast reliability.

4 cl, 1 dwg, 1 tbl