Research on control and prediction method of safety distance of oil-gas pipelines in aeolian sand mining subsidence area
In order to optimize the safe distance arrangement of oil-gas pipeline in the coal mining sub-sidence area,taking the gas-coal overlap area in the Ordos Basin as the engineering background,the sur-face subsidence curve Gaussian function is proposed based on the probability integration method.This function combines the movement trajectory with limit of the pipeline in the subsidence area.By establis-hing the relationship between deformation levels and the surface subsidence curve,a predictive method for controlling the safe distance of oil and gas pipelines in subsidence areas is developed,the method that is compared and validated through numerical analysis and engineering applications.The results show that the pipeline movement trajectory in the subsidence area is directed to the center of the goaf in a straight line along the surface subsidence curve,showing bending settlement deformation;the predictive method for safe distance control of oil and gas pipelines in subsidence areas is devised,taking into account both the pipeline and coal mining activities.Under the premise of safe activity,this approach aims to mini-mize the distance between working face and the oil-gas pipeline;providing a new method for the pipeline layout in the overlapped area of gas-coal.It also yields insights into the coordinated extraction of gas-coal resources,addressing challenges related to the development of coal-measure resources under a co-extraction mechanism.
万方数据
维普
