综采工作面深孔预裂爆破卸压技术研究

Research on Pressure Relief Technology of Deep Hole Presplitting Blasting in Fully Mechanized Mining Face

为了解决61103综采工作面坚硬顶板不易垮落的问题,确保综采工作面的生产安全,采用UDEC软件对深孔卸压爆破前后采空区顶板覆岩移动形态进行分析,发现采用深孔预裂爆破卸压技术后,综采工作面基本顶顶板初次垮落破断形式、步距与周期来压时基本顶破断形式、步距相近,并依据61103综采工作面地质情况,设计了综采工作面深孔预裂爆破卸压技术方案。现场应用该技术方案后,顶板初次来压步距为28.12 m,来压时支架工作阻力为24.2 MPa,顶板垮落来压不明显,可以确保综采工作面的生产安全。

In order to solve the problem that the hard roof of 61103 fully mechanized coal mining face is not easy to collapse and ensure the safety of mining face,UDEC software was used to analyze the movement pattern of overburden rock in the goaf before and after deep hole pressure relief blasting.After applying the mining technology,the initial roof striking step of the mining face was close to that of the periodical pressure,and the basic form of roof breaking was also similar.According to the geological condition of the 61103 mining face,a technical plan for deep hole pre-splitting blasting pressure relief was designed.After the on-site application,the first step of the roof pressure was 28.12 m,the working resistance of the bracket was 24.2 MPa,and the pressure of the roof is not obvious,which can ensure the safety of mining face production.