Application Practice of Hydraulic Fracturing Technology in First Caving of Working Face
In view of the problems of large initial caving step and intense mine pressure of hard roof during the initial mining,which brought safety risks to production,high-pressure hydraulic fracturing roof caving technology was proposed with 42208 working face of Liangshuijing Coal Mine as the research object.According to the geological conditions of the working face,the fracturing parameters were optimized and a reasonable hydraulic fracturing technology scheme was determined.Field practice shows that the roof can be caved in time during the mining process by using hydraulic fracturing technology,reducing the initial compressive strength and ensuring the safe production of the working face.
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