综采工作面爆破切顶技术及应用效果——以王坡煤矿3307工作面为例
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Blasting Roof Cutting Technique and Its Application Effects in Comprehensive Mining Work Faces:Taking the 3307 Work Face of Wangpo Coal Mine as a Case
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    摘要:

    为解决采空区坚硬顶板难垮落及邻近巷道两帮大变形问题,结合综采面煤层地质,优化设计爆破切顶参数,提出深孔预裂爆破切顶专项方案,采用现场试验对切顶卸压效果进行分析。分析结果表明,采用聚能爆破切顶技术后,巷道表面位移变形量减幅为30%,顶板深部围岩位移减幅为37%。实践表明,采用“爆破孔间设置导向孔”的钻孔布置方式,卸压效果显著,巷道围岩稳定性得到良好的控制,巷道情况得到改善,同时,聚能爆破切顶卸压技术可大幅度提高作业效率,为类似矿压防治工程提供借鉴。

    Abstract:

    To address the difficulties in the collapse of the hard roof in goaf areas and the significant deformation of the surrounding roadways, an optimized design for blasting parameters was developed based on the geological conditions of the coal seam in the fully mechanized mining face. A specialized deep hole pre-splitting blasting method for roof cutting was proposed, and on-site experiments were conducted to analyze the effects of roof cutting and pressure relief. The analysis results indicate that after implementing the energy accumulation blasting technology for roof cutting, the surface displacement deformation of the roadway decreased by 30%, the deep surrounding rock displacement of the roof decreased by 37%. Practical application has shown that the arrangement of drilling holes with “guiding holes set between blasting holes” significantly improves the pressure relief effect, enhances the stability of the roadway surrounding rock, improves the roadway conditions, and substantially increases operational efficiency. This technology of energy accumulation blasting for roof cutting and pressure relief can serve as a valuable reference for similar mine pressure control projects.

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杨洋.综采工作面爆破切顶技术及应用效果——以王坡煤矿3307工作面为例[J].科技与产业,2024,24(24):354-358

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  • 在线发布日期: 2025-01-13
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