Simulation Study on Reasonable Parameters of Hard Roof Cutting
In order to solve the problem of hard and difficult to collapse,this article conducts research on the pressure relief technology of dense drilling based on numerical simulation software.Firstly,the weakening effect of the roof under drilling angles of 70 °,80 °,90 °,100 °,110 °,and drilling depths of 5 m,6 m,7 m,8 m,9 m,and 10 m is analyzed.The top cutting effect under different drilling angles and drilling depths is simulated,and it is found that the best weakening effect of the roof is achieved when drilling angles of 100 ° and drilling depths of 9 m.At this point,the top cutting effect is the best,providing a reference for subsequent top cutting and pressure relief plans.
numerical simulationhard top platedrilling depthdrilling depth
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