中文摘要：

基于螺旋破煤机理和诱喷增透防突技术,运用ANSYS软件建立喷孔孔洞有限元模型,模拟了喷孔后孔洞周围煤体应力分布及位移变化规律,并在川煤集团杉木树矿进行了工业性试验。数值模拟结果表明：诱喷后形成卸压空间,煤体应力重新分布,出现应力三区：卸压区、应力集中区及原始应力区,卸压占主导地位。同水平煤层总位移变化均衡,孔洞上部卸压效果优于下部。经现场试验及应用,切煤诱喷后,煤体暴露面积及扰动体积有了大幅度地提高,诱喷孔平均瓦斯抽采浓度是普通孔的2.33倍,瓦斯抽采效率得到改善。

英文摘要：

Based on the spiral coal breaking mechanism and the outburst prevention technology by induced flow and permeability improvement, the finite element model of jet orifice was established by ANSYS software. In addition, the coal stress distribution around the jet orifice and the displacement variation laws were simulated. The industrial test was carried out in Shanmushu Coal mine of Sichuan Coal Group. The simulation results showed that the pressure relief space formed after induced flow and the coal stress redistributed. And three stress zones appeared, such as the distressed zone, the stress concentrated zone and the original stress zone. While the pressure relief plays a leading role. The whole displacement varied constantly at the same level, and the pressure relief effect in the upper section is superior to that in the lower section. The application results showed that the exposed area and disturbance volume increased significantly after induced flow of coal cutting, and the average gas concentration from induced flow hole is 2.33 times higher than that from the general hole, indicating an improved gas drainage effect.