提升大采高工艺开采效率研究

Research on Improving the Mining Efficiency of High Mining Technology

为进一步提升大采高工艺的开采效率,重点解决大采高工艺的煤壁片帮问题,以某矿工作面为例,在对其工作面顶底板条件分析的基础上,通过液压支架工作状态监测分析了某矿煤壁片帮的主要特征和主要原因,并针对性提出了解决煤壁片帮的具体措施。实践表明,煤壁片帮措施应用后,液压支架的平均工作阻力最大减幅为11.6%;工作面顶板初次垮落步距减少了17 m,周期来压步距减少了5 m,基本顶的初次来压步距减少了13 m;有效解决了大采高工艺的煤壁片帮问题。

In order to further improve the mining efficiency of the large mining height process and focus on solving the problem of coal wall spalling of the large mining height process,taking a coal face as an example,based on the analysis of the conditions of the roof and floor of its working face,the main characteristics and causes of coal wall spalling of a coal mine are analyzed through the monitoring of the working state of hydraulic support,and specific measures to solve the problem of coal wall spalling are proposed.Practice has shown that after the application of coal wall spalling measures,the maximum reduction in average working resistance of hydraulic supports is 11.6%.The initial collapse step of the working face roof has been reduced by 17 meters,the periodic weighting step has been reduced by 5 meters,and the initial weighting step of the basic roof has been reduced by 13 meters,which effectively solved the problem of coal wall spalling in the large mining height process.