Optimization Design and Research of Fracturing Coal Seam Mining Technology in High Mining Height Working Face
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%.
large mining heightfracturing coal seamsmining process
NETL
NSTL
万方数据
