Research on the Influence of Old Roadway with a Network Distribution on Coal Pillar Working Face and the Technique of Passing Through Roadway
[Purposes]The old roadways with a network distribution are prone to accumulating harmful gases or leading to water sources in the old goaf cracks,posing a significant threat to the safety produc-tion of the mining face.Therefore,effective measures are needed to prevent the accumulation of harmful gases or water inrush accidents during the production period of such working faces,and to improve safety production efficiency.[Methods]Taking the 21 coal pillar working face of Xindeng Coal Mine as the re-search object,the comprehensive prevention and control technologies such as advanced detection,strengthened support,harmful gas monitoring,and emergency response were proposed by diagnosing and analyzing the hazards and disaster factors of different characteristics of old tunnels with network distribu-tion.And this comprehensive prevention and control technology was put into practice in the 21 coal pil-lar working face.[Findings]The results showed that after adopting the comprehensive prevention and control technology through tunnels in the 21 coal pillar working face,no harmful gas accumulation,water inrush,or various roof accidents occurred,and the working face achieved safe and efficient production.[Conclusions]This research result can be promoted and applied in the production of similar working faces.
coal pillar working facenetwork distributionold roadwaytechnique of passing through roadway
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