Research and Application of Prestressed Grouting Anchor Cable Technology in Advanced Support of Working Face
The 5308 first mining face in the fifth panel of Changping Coal Industry Co.,Ltd.is mined by heavy top-coal caving technology.Due to the large buried depth and the direct floor is mudstone,the single columns broke through the floor,and the walls and floor of advanced roadway of the two crossheadings were seriously caved.The traditional advanced support form of single column with metal beam cannot meet the needs of safe and efficient production,and it is urgent to explore a scientific and effective new advance support technology.Based on this,the advanced support technology of mining roadway with"prestressed grouting cable reinforcement"as the technical core was proposed.The results show that the proposed advanced technology can transform passive support into active support,and can improve the overall strength of the roof,improve the surrounding rock conditions of the roadway,and create a safe and comfortable working environment.
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