Y型通风下黄陵一矿1010工作面采空区漏风通道研究及封堵技术

Air leakage pathways and sealing techniques for the goaf of 1010 working face of Huangling No. 1 Mine under Y-type ventilation

  • 摘要: 采用110工法后工作面通风方式由U型通风变为Y型通风,造成了采空区漏风增大,遗煤在漏风高氧条件下存在氧化加快等问题。为掌握黄陵一号煤矿1010工作面在开采过程中采空区及沿空留巷漏风规律,以黄陵一矿1010工作面为工程背景,采用理论分析与现场实测相结合的方法,研究掌握110工法下综采工作面贯通采空区后的漏风规律。研究表明,在1010工作面及后巷存在多个漏风通道,平均漏风速率大于0.27~0.48 m/s; 1010工作面沿空留巷150~900 m处,风量不断增大,其中在150~300 m处为采空区风流向1010工作面沿空留巷的主要区域;此外1010工作面119支架至11支架之间存在采空区向工作面的漏风;在此基础上,针对主要漏风区域提出“设置堵漏隔离墙、采空区注胶”封堵技术,以解决采空区漏风情况,从而保障煤矿安全高效生产。

     

    Abstract: After adopting the 110 mining method,the ventilation mode of the working face shifted from U-type to Y-type ventilation,resulting in increased air leakage in the gob area. This has led to accelerated oxidation of residual coal under highoxygen conditions caused by air leakage. To understand the air leakage patterns in the gob area and along the goaf-side entry of the 1010 working face during mining of No. 1 Huangling Coal Mine,this paper takes the 1010 working face of the No. 1 Huangling Mine as the engineering background. By combining theoretical analysis with field measurements,the study investigates the air leakage patterns after the fully mechanized mining face connects with the gob area under the 110 mining method. The research shows that there are multiple air leakage channels in the 1010 working face and its rear entry,with an average air leakage rate exceeding 0.27~0. 48 m/s. Along the goaf-side entry of the 1010 working face,from 150 m to 900 m,the air volume continuously increases,with the primary area of airflow from the gob area to the goaf-side entry located between 150 m and 300 m. Additionally,air leakage from the gob area to the working face occurs between support No. 119 and support No. 11. Based on these findings,a sealing technology involving “constructing isolation walls and injecting grout into the gob area” is proposed for the main air leakage zones to address the air leakage issue and ensure safe and efficient coal mine production.

     

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