大断面煤巷掘进支护参数优化及作业滞后距离研究

Research on Optimisation of Support Parameters and Operation Lag Distance in Large Section Coal Mine Tunneling

为解决大断面煤巷支护难度大且效率低,导致采掘比例不协调进而影响煤矿生产效率的问题,在对工作面地质和现支护方案所存在问题分析的基础上;基于FLAC3D软件对不同支护方案对应工作面围岩的稳定性进行对比,确定采用方案二对支护方案进行优化;最后,在实施层面对掘进工艺和支护作业的滞后距离进行确定,实践表明,采用多工序交叉平行作业可直接提高掘进效率25.3%.

In order to solve the problem of large cross-section coal mine support,which is difficult and inefficient,leading to the uncoordinated ratio of mining and digging and thus affecting the efficiency of coal mine production,based on the analysis of the geology of the working face and the problems of the current support scheme;based on the comparison of the stability of the peripheral rock of the working face corresponding to the different support schemes based on the FLAC3D software,it is determined to optimize the support scheme by adopting the scheme 2;finally,at the implementation level,it is determined to optimize the support parameters of the digging process and support operation and the lag distance of the operation.The lagging distance of digging process and supporting operation is determined,and practice shows that the adoption of multi-process cross parallel operation can directly improve the digging efficiency by 25.3%.