大采高工作面液压支架快速回撤工艺实践研究

Practical Research on Rapid Withdrawal Process of Hydraulic Support in Large Mining Height Working Face

  • 摘要: 针对大采高工作面液压支架回撤过程中顶板稳定性差、作业风险高和效率偏低等问题,依托兴隆庄煤矿10303工作面实践,设计并应用“分段扩刷成巷-液压框架起吊装置-精密滑轨自移”一体化快速回撤新工艺。扩刷阶段通过高强锚索支护将顶底板垂直收敛量控制在±20 mm,形成4.8 m、7.3 m、11.9 m递进式断面;拆装硐室配用KYX-17-4液压框架起吊装置,实现7 t级部件“人机分离”拆解;滑轨导向系统实测导向偏差小于±10 mm(激光测距仪),支架自移平稳连续。工业试验结果显示:回撤周期由传统40 d缩短至21 d,高风险作业环节减少80%以上,单架拆除效率提升2.5倍,整体回撤周期缩短约47.5%。研究为大采高综采工作面液压支架高效、安全、智能化回撤提供了可行技术路径。

     

    Abstract: Aiming at the problems of poor roof stability, high operational risk, relatively low efficiency and others in the process of hydraulic support withdrawal in large minig height working face, based on the practice of the 10303 working face in Xinglongzhuang Coal Mine, a new integrated rapid withdrawal process of "segmented brushing expansion and roadway forming - hydraulic frame lifting device - precision sliding rail self-movement" is designed and applied. During the brushing expansion stage, the vertical convergence quantity of the roof and floor is controlled within ± 20 mm through high-strength anchor cable support, forming progressive cross-sections of 4.8 m, 7.3 m, and 11.9 m; The dismantling chamber is equipped with KYX-17-4 hydraulic frame lifting device to achieve the "human-machine separation" dismantling of 7 t level components; The actual measured guiding deviation of the sliding rail guidance system is less than ±10 mm (laser rangefinder), and the bracket self-movement is smooth and continuous. The industrial test results indicate that the withdrawal cycle is shortened from the traditional 40 d to 21 d, the high-risk operation links are reduced by over 80%, the single bracket dismantling efficiency is improved by 2.5 times, and the overall withdrawal cycle is shortened by 47.5% approximately. The research provides a feasible technical path for the efficient, safe, and intelligent withdrawal of hydraulic supports in large mining height fully mechanized mining faces.

     

/

返回文章
返回