极软地层巷道围岩变形机理与控制技术研究
发布时间：2018-11-24 19:26
【摘要】：为了解决北皂煤矿海域二采区回风巷围岩强度低、自承能力差、变形速度快、难以维护的难题,从围岩力学特性、软岩巷道流变特性、扰动影响、巷道底鼓、围岩失水风干崩解等方面进行了研究。研究结果表明:在揭示该类巷道围岩变形机制基础上,提出了高强度钢管混凝土支架支护方案,巷道断面采用圆形,钢管混凝土支架支护钢管选用Φ194 mm×8 mm钢管,接头套管选用Φ219 mm×8 mm的钢管,充填标号C40混凝土,支架壁后辅助钢筋网支护和混凝土喷碹支护,监测出支架的变形量为20~80 mm,最大变形也只达到80 mm,支架没有明显变形,钢管混凝土支架支护方案能够控制北皂煤矿海域二采区回风巷围岩变形,保持巷道围岩的稳定。
[Abstract]:In order to solve the problems of low surrounding rock strength, poor self-supporting capacity, fast deformation speed and difficult maintenance in the second mining area of Beizao coal mine area, the mechanical properties of surrounding rock, rheological characteristics of soft rock roadway, disturbance effect, and roadway floor bulging are discussed. The water loss and air drying collapse of surrounding rock were studied. The results show that, on the basis of revealing the deformation mechanism of surrounding rock of this kind of roadway, a high strength concrete filled steel tube support scheme is put forward. The roadway section is round, and the steel pipe of concrete filled steel tube is 桅 194 mm 脳 8 mm pipe. The joint casing is made of 桅 219 mm 脳 8 mm steel pipe, filled with marked C40 concrete, and supported by steel mesh and concrete shotcreting at the back of the support wall. The maximum deformation of the support is 20 ~ 80 mm, and the maximum deformation of the support is only 80 mm,. There is no obvious deformation of the support. The support scheme of concrete filled steel tube (CFST) can control the surrounding rock deformation of return air roadway in the second mining area of Beizao Coal Mine, and keep the stability of surrounding rock of roadway.
【作者单位】： 华北科技学院安全工程学院;山东建筑大学土木工程学院;
【基金】：国家自然科学基金资助项目(51404105) 河北省自然科学基金资助项目(E2015508047) 中央高校基本科研业务费资助项目(3142015085,3142017030)
【分类号】：TD353
本文编号：2354759
[Abstract]:In order to solve the problems of low surrounding rock strength, poor self-supporting capacity, fast deformation speed and difficult maintenance in the second mining area of Beizao coal mine area, the mechanical properties of surrounding rock, rheological characteristics of soft rock roadway, disturbance effect, and roadway floor bulging are discussed. The water loss and air drying collapse of surrounding rock were studied. The results show that, on the basis of revealing the deformation mechanism of surrounding rock of this kind of roadway, a high strength concrete filled steel tube support scheme is put forward. The roadway section is round, and the steel pipe of concrete filled steel tube is 桅 194 mm 脳 8 mm pipe. The joint casing is made of 桅 219 mm 脳 8 mm steel pipe, filled with marked C40 concrete, and supported by steel mesh and concrete shotcreting at the back of the support wall. The maximum deformation of the support is 20 ~ 80 mm, and the maximum deformation of the support is only 80 mm,. There is no obvious deformation of the support. The support scheme of concrete filled steel tube (CFST) can control the surrounding rock deformation of return air roadway in the second mining area of Beizao Coal Mine, and keep the stability of surrounding rock of roadway.
【作者单位】： 华北科技学院安全工程学院;山东建筑大学土木工程学院;
【基金】：国家自然科学基金资助项目(51404105) 河北省自然科学基金资助项目(E2015508047) 中央高校基本科研业务费资助项目(3142015085,3142017030)
【分类号】：TD353
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