石门揭煤数值模拟及钻孔设计

Numerical simulation and borehole design of cross-cut uncovering coal

采用UDEC数值模拟方法,分析了石门揭煤过程中垂直应力的变化情况,介绍了石门揭煤瓦斯抽采钻孔设计的理论依据,并建立了卸压钻孔设计计算模型,为钻孔提供了倾角、方位角、长度等参数,简化了钻孔的设计步骤。

Applying UDEC numerical simulation method, the paper analyzes vertical stress change conditions in cross-cut uncovering coal process,introduces theoretical basis of cross-cut uncovering coal gas drainage borehole design, and establishes unloading borehole design compu-tation model. As a result, i t not only provides inclination angle, azimuth and length and other parameters for borehole, but also simplifies bore-hole design steps.