Research on sensitive index and critical value of local prediction for coal roadway insteep seam. Issue 1 (September 2020)

• Record Type: Journal Article
• Authors: Wang, ZHonghua; Sun, Luanluan
• Is Part Of: IOP conference series. Volume 565:Issue 1(2020)
• Publication Date: 2020-09
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/565/1/012094
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: In response to the prediction of the local outburst danger of steeply inclined coal seams, it tested the initial gas emission rate of coal ΔP, the firmness coefficient f of coal, and the gas desorption characteristics K1 -P in laboratory. Using the methods of historical data analysis, on-site inspection and on-site expansion verification, it was determined that the drill cuttings volume index S and drill cuttings gas desorption index Δh2 are the sensitive indexes and critical values for the coal roadway prediction in Qingshan Coal Mine. The application effect is good, which provides reference for mines with similar conditions.