深部软岩巷道动态注浆的数值模拟及其应用  

Numerical Simulation of Dynamic Grouting for Deep Soft Rock Roadway and Its Application

作　　者：马紫阳 王同旭[1] 刘灿华 曲孔典 MA Ziyang;WANG Tongxu;LIU Canhua;QU Kongdian(Shandong University of Science and Technology,Qingdao 266590,China;Shandong Energy Xinwen Mining Group Co.,Ltd.,Tai＇ an 271000,China;China Coal Technology and Engineering Group Chongqing Research Insitute,Chongqing 400039,China)

机构地区：[1]山东科技大学,山东青岛266590 [2]山东能源新矿集团有限责任公司,山东泰安271000 [3]中煤科工集团重庆研究院有限公司,重庆400039

出　　处：《煤矿安全》2018年第8期239-242,共4页Safety in Coal Mines

基　　金：山东省自然科学基金资助项目(ZR2016EEM36)

摘　　要：以上海庙矿区+590 m井底车场为研究对象,通过运用FLAC3D数值模拟软件内置的应变软化本构模型和FISH语言构建了动态注浆数值模拟方法,该方法能够自动根据围岩塑性剪切应变大小确定可注浆范围,按照分段函数提高可注浆范围内煤岩体黏聚力值。经过不同注浆时机(一次支护后围岩变形量)注浆后围岩变形对比,得到合理注浆时机的理论值,然后将现场实测变形与模拟值对比,得到合理现场注浆时机。根据数值模拟的可注浆范围,给出了顶板注浆锚索及帮部注浆锚索的设计长度。将上述分析结果应用于现场软岩巷道二次加固,经现场变形速度测试分析表明,试验取得了较好效果。初步验证了本文动态注浆模拟方法的科学性与可行性。Take the ＋590 m shaft station of Shanghaimiao Mining Area as the research object, the dynamic grouting numerical simulation method is constructed by using the strain softening constitutive model and FISH language built in FLAC3 Dnumerical simulation software. The method can automatically determine the grouting range according to the size of the plastic shear strain of the surrounding rock, and improve the cohesion value of the coal rock mass in the grouting range according to the section function. Through the comparison of the surrounding rock deformation after different grouting time（deformation of surrounding rock after primary support）, the theoretical value of reasonable grouting time was obtained, then the field measured deformation was compared with the simulated value, and the rational grouting time was obtained. According to the grouting range of numerical simulation, the designed length for roof and roadside grouting anchor cable is given. The above analysis results are applied to the secondary reinforcement of soft rock roadway in the field, and the test results show that the test results are good, which verifies the scientificity and feasibility of dynamic grouting simulation method in this paper.

关 键 词：软岩巷道 注浆时机 注浆范围 数值模拟 巷道支护 围岩控制 

分 类 号：TD353.8[矿业工程—矿井建设]