综放工作面周期来压判定与冲击危险处置
Periodic weighting judgment and rock burst danger control on fully mechanized top-coal caving face
买巧利 1吴学松 2吕甲鹏 1赵文元1
作者信息
- 1. 华亭煤业集团华亭煤矿,甘肃平凉 744100
- 2. 华亭煤业集团砚北煤矿,甘肃平凉 744100
- 折叠
摘要
冲击地压煤层综放开采过程中,顶板会发生周期来压,释放大能量震动,诱发冲击显现,因此准确掌握工作面周期来压规律对冲击地压防治是极其重要的.针对周期来压单一方法分析误差较大的缺陷,通过对工作面回采过程中微震监测指标"震动频次""震源能量"、瓦斯涌出量变化以及工作面支架压力分布云图分析,提出一种"微震-支架压力-瓦斯涌出量"综合判定方法.实践表明,该方法能够准确预测甘肃某矿250107-1工作面来压周期,并提出了"断顶-松动"爆破相结合的顶板弱化方法,可以有效降低冲击地压的危害.
Abstract
In the process of fully mechanized caving of coal seam,the roof will be periodically weighted,which releases large energy vibration and induces shock behavior.Therefore,it is very important to accurately grasp the weighting law of the working face for the prevention and control of rock burst.In view of the large error in the analysis of the single method of pe-riodic weighting,a comprehensive determining method of"microseismic-support pressure-gas inrush"is proposed by analy-zing the microseismic monitoring indicators of"vibration frequency","source energy",change of gas emission amount,and the distribution cloud map of support pressure on the working face during the mining process.The method can precisely pre-dict the weighting cycle of the 250107-1 working face.We propose that adopting a combination of"roof failure-loosening"blasting to weaken the roof can effectively reduce the danger of rock burst.
关键词
综放开采/周期来压/微震监测/冲击地压/来压步距Key words
full-mechanized caving mining/periodic weighting/microseismic monitoring/rock burst/weighting step引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据