極軟地層巷道圍巖變形機理與控制技術(shù)研究
[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.
【作者單位】: 華北科技學(xué)院安全工程學(xué)院;山東建筑大學(xué)土木工程學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(51404105) 河北省自然科學(xué)基金資助項目(E2015508047) 中央高;究蒲袠I(yè)務(wù)費資助項目(3142015085,3142017030)
【分類號】:TD353
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