论文部分内容阅读
当前我国煤矿深部开采中,松软煤层低渗透性是制约瓦斯抽采的瓶颈问题,水力扩孔(割缝)是有效的增透措施,但扩孔效果的评价目前多采用静态指标,导致扩孔优化费时费力且不准确,为进一步优化扩孔措施,快速确定合理施工参数,保证达到最优扩孔效果,在现场实测的基础上,提出了不同时间有效抽采半径的动态评价方法。这一方法为快速优化扩孔参数提供了理论指导。
In the current deep mining of coal mines in China, the low permeability of soft coal seams is the bottleneck restricting the gas drainage. Hydraulic reaming (kerf) is an effective anti-penetration measure. However, the reaming effect is mostly evaluated by static indicators, The optimization is time-consuming and inaccurate. In order to further optimize the reaming measures, the reasonable construction parameters can be quickly determined and the optimal reaming effect can be achieved. On the basis of field measurements, a dynamic assessment method for the effective mining radius at different times is proposed. This method provides a theoretical guide for the rapid optimization of borehole parameters.