大采高工作面压裂煤层开采工艺优化设计与研究

Optimization Design and Research of Fracturing Coal Seam Mining Technology in High Mining Height Working Face

根据23101工作面大采高煤层硬度高,裂缝发育不完善,截割体积块度小的缺点,结合割煤形式和压裂煤层模型,建立压裂煤层数值模型,对不同煤层下切割深度、割落煤体的影响进行模拟仿真,基于现场实验数据表明:压裂后,工作面煤壁裂缝显著增加,每次切割的时间缩短了11.3%,牵引速度提升了12%,粉尘质量浓度减少了46%,同时,块煤率增加了19.7%。

Based on the high hardness,incomplete crack development,and small block size of the high mining coal seam in the 23101 working face,combined with the coal cutting form and fracturing coal seam model,a numerical model of the fracturing coal seam is established.The influence of cutting depth and cutting coal body under different coal seams is simulated and simulated.Based on on-site experimental data,it is shown that after fracturing,the coal wall cracks in the working face significantly increase,the time for each cutting is shortened by 11.3%,the traction speed is increased by 12%,the dust concentration is reduced by 46%,and the block coal rate is increased by 19.7%.