坚硬顶板膨胀管静态致裂技术的数值模拟与实地测试  

Numerical Simulation and Field Testing of Static Fracturing Technology of Hard Roof Expansion Tube

作　　者：田鹏飞 Tian Pengfei(Shanxi Province Yangquan Guzhuang Coal Industry Co.,Ltd.,Yangquan 045000,China)

机构地区：[1]山西省阳泉固庄煤业有限责任公司,山西阳泉045000

出　　处：《山东煤炭科技》2025年第4期128-131,共4页Shandong Coal Science and Technology

摘　　要：针对坚硬顶板处理中的难题,提出并验证了膨胀管静态致裂技术的应用方法与效果,通过建立煤岩体的数值模型,模拟分析不同钻孔参数对膨胀管致裂效果的影响,选定最优参数组合用于实地测试。研究采用FLAC^(3D)软件模拟煤岩体在高压条件下的应力分布和裂隙扩展情况,并通过在固庄煤矿15902回风巷进行的实地测试,验证了数值模拟的准确性和技术的可行性。结果表明,选定的钻孔直径和孔距在施加50 MPa压力条件下,能够有效形成贯通的裂隙网络,显著减小顶板的应力集中,提高了顶板的稳定性和安全性。Aiming at the difficult problems in the treatment of hard roof,the application method and effect of static fracturing technology of expansion tube are proposed and verified.By establishing a numerical model of coal rock mass,the influence of different borehole parameters on the fracturing effect of expansion tube is simulated and analyzed,and the optimal parameter combination is selected for field testing.This study adopts FLAC^(3D)software to simulate the stress distribution and fissure expansion situations of coal rock masses under high pressure conditions,and verifies the accuracy and technical feasibility of the numerical simulation through the field testing conducted in the 15902 return air roadway of Guzhuang Coal Mine.The results indicate that the selected borehole diameter and hole spacing can effectively form a through fissure network under the condition of applying a pressure of 50 MPa,significantly reducing stress concentration of the roof and improving stability and safety of the roof.

关 键 词：膨胀管 致裂 模拟 实验 

分 类 号：TD327.2[矿业工程—矿井建设]