水力压裂技术在工作面初次放顶中的应用实践

Application Practice of Hydraulic Fracturing Technology in First Caving of Working Face

坚硬顶板初采期间初次垮落步距大、矿压显现剧烈,给生产带来了巨大的安全隐患。以凉水井煤矿42208工作面为研究对象,提出了高压水力压裂放顶技术。结合工作面地质条件,对压裂参数进行优化,确定合理的水力压裂技术方案。现场实践表明,采用水力压裂放顶技术,工作面回采过程中顶板能够及时垮落,降低了初次来压强度,保证了工作面安全生产。

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.