Determination on Sensitive Index and Its Critical Value of No. 7 Seam Outburst Hazard in Wulan Coal Mine
ZHANG Yuming
Abstract：In order to determine the sensitive index and its critical value for outburst hazard prediction in the process of roadway driving in the mine with coal and gas outburst and guide the implementation of outburst prevention measures in the field, the initial values of the sensitive index and its critical value for outburst hazard prediction in the working face were screened and determined based on the analysis of relevant experimental parameters and collection of previous data, finally, the sensitive index and its critical value for outburst hazard prediction in the working face in the outburst seam was determined by using three-ratio method and grey correlation method. Based on the site investigation in the heading face in Wulan Mine, it was determined that the sensitive index for outburst hazard prediction in No. 7 seam was the drilling cuttings gas desorption index k1 value and drilling cuttings volume index S value, and under the normal geologic conditions, the critical value of k1 value was 0. 48 mL/( g · min0. 5 ) and that of the drilling cuttings volume S value was 4. 82 kg/m; under the abnormal geological conditions, k1 value was 0. 38 mL/( g·min0. 5 ) and the S value was 3. 85 kg/m.
Keywords：coal and gas outburstsensitivity indexthree-ratio methodgrey correlation method
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 74-77 )