Study Of The Stability Of Huangdao Lpg Strorage Terminal And Support Optimization

LPG is clear energy, and it is a kind dangerous chemical which is combustible and explosive. LPG underground storage uses the underground carve to store the LPG, by the way of water seal curtain, which is safe, economical, and big storage. Underground storage is the future oil and gas storage technical.The stability of LPF storage and support optimization is the content of this paper. First, on the base of excavation monitoring data of carve; it calculates the parameters of rock. Then, it adopted FLAC3D to simulate the stability of rock, plastic area development and the order of excavation in the main carves. Based on the rock condition A, there's no plastical area showed; based on the rock condition B, the little plastical area is showed on the wall, which is mainly the shearing stress plasticity. Based on condition C, more plastical area appears on the wall and floor, which extends into the depth about 1.3m. After the analysis of simulation results, the three-layer method produces more plasticity of 7.8% than four-layer method during excavation. Meanwhile the simulation results show that the order of excavation effects the surrounding rock little, the working faces extending without spacing will produce little plasticity and movement.By the way of block theory, we analyze the unstable block formed by discontinuous faces, which results that no big wedges occur. The block in roof is mainly little than It, the max block produced in wall is 10.7t, so the wall should be monitored and supported with more attention. It simulates the stability of intersection area between main carve and shaft, which foresee the deformation of rock. The quadrature method is used to optimize the support parameters.