Research On Gas Content Critical Value For Regional Prediction Of Different Coal Rank In Anyang Mine Area

The risk of coal and gas outburst in Anyang mining area is generally more; the metamorphicdegree changes from coking coal to anthracite and the difference is obvious, so studying on thedifferent rank of regional prediction gas content about critical value at Anyang mining area has greatsignificance which is used for regional prediction and outburst prevention effect test.This thesis takes the serious outburst coal mine Longshan and Dazhong as the research subject.Analyzing the outburst data of Longshan and Dazhong mine, studying the characteristics of the mineoutburst and gas occurrence law of the salient points, site tracking the gas content of the testing faceand the relative forecast indicators, determining the threshold range of the regional projections;analyzing the adsorption characteristics of different coal rank and influencing factors; and comparingthe differences of adjacent mining coal rank, coal structure and tectonic coal development todetermine the influence of coal rank on the critical value of the gas content of regional projections;analyzing the relationship between gas content and gas pressure balance and gas Desorption Indexby studying the adsorption and desorption in the simulation experiment on samples collected in thelaboratory, and further determining the critical value of the gas content.Through the above further study, thinking over the tectonic coal growth and distribution, finallydetermining the threshold of serious outburst of Anyang Mining Area and Long Shan mine areaprediction and effect of the testing gas content are10.0m~3/t and8.0m~3/t, the field test inspection andchecking prove that this result is reliable.