Analysis on Blasting Operation in Surface Limestone Mine Affected to Mine Roadway Stability and Gas Emission in Underground Coal Mine
YAO Shang-wen
Abstract：According to the blasting mining in the surface limestone mine would threaten the safety pro-duction in the underground coal mine,the paper analyzed the “three zones”development law and the gas emission law of the underground seam and the blasting operation of the surface limestone mine af-fected to the mine roadway stability and the gas emission volume in Nanyang Coal Mine.A study was conducted on the determination of the critical safety thickness of the roof rock pillar in the under-ground mine and the relationship between the blasting vibration speed and the blast center distance and largest section explosive quantity.The results showed that ① when Xiaogecun Limestone Mine was in the mining blasting,the allowed explosive quantity of the largest section should not be over 1 90 kg and the critical safety thickness of the roof rock pillar in the mine roadway of Nanyang Coal Mine should not be less than 42.2 m.② When Xiaogecun Limestone Mine was in the mining blasting,as soon as the explosive volume of the largest section and the total explosive volume would not be over the allowed value and according to the scheduled required mining,the blasting would not be affected to the roof stability of the mining face and the gas emission volume in Nanyang Coal Mine.
Keywords：blasting vibrationstability of mine roadwaygas emissioncritical safety thicknessexplo-sive quantity for largest section
Publication Date：2016-05-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 37-40,58 )