急倾斜煤层采空区地面塌陷及其对输气管道危害的数值模拟

NUMERICAL ANALYSIS OF GROUND SUBSIDENCE DUE TO STEEPLY INCLINED SEAM MINING AND ITS EFFECT ON GAS PIPELINE

摘要: 采空区引起的地面塌陷和裂隙评价是影响输气管道安全的技术难题之一,应用有限差分法对西北地区某输气管道下方采空区的变形与稳定性进行数值模拟,分析了采空区引起地面裂缝的原因,并对输气管道的安全性进行了量化评价。

Abstract: The evaluation on the ground subsidence and cracks due to steeply inclined seam mining is one of the difficulties affecting the safety of gas pipelines. Numerical simulation of the ground deformation and stability surrounding the gas pipeline in somewhere in Northwestern area is conducted by applying finite difference method (FDM). The reason of crack occurring in the ground due to mining is analyzed, and the safety of gas pipeline is quantitatively evaluated.