Bazaluk Oleg, Kuchyn Oleksandr, Saik Pavlo, Soltabayeva Saule, Brui Hanna, Lozynskyi Vasyl, Cherniaiev Oleksii
Belt and Road Initiative Center for Chinese-European Studies (BRICCES), Guangdong University of Petrochemical Technology, Maoming, 525000, China.
Department of Geodesy, Dnipro University of Technology, Dnipro, 49005, Ukraine.
Sci Rep. 2023 Nov 7;13(1):19327. doi: 10.1038/s41598-023-46814-5.
Underground mining of minerals is accompanied by a change in the rock mass geomechanical situation. This leads to the redistribution of stresses in it and the occurrence of unexpected displacements and deformations of the earth's surface. A significant part of the civil and industrial infrastructure facilities are located within the mine sites, where mining and tunneling operations are constantly conducted. Irrational planning of mining operations can lead to loss of stability and destruction of undermined facilities. Therefore, it is important to study the earth's surface deformation processes during mining operations, which ensures safe and sustainable operating conditions. The research objective of this paper is to analyse the behaviour of a natural gas pipeline under the influence of underground mining activities, with a particular focus on understanding the effects of horizontal surface deformations and their potential impact on pipeline safety and structural integrity. Its performance and safety are determined on the basis of the found parameters of the earth's surface horizontal deformations and their comparison with permissible parameters characterizing the conditions for laying pipelines, depending on the mining-geological conditions and the degree of their undermining. Based on determined conditions for the safe undermining of the natural gas pipeline, it has been revealed that in its section between the PK212+40 and PK213+80 (140 m) pickets, the estimated parameters of the earth's surface horizontal deformations exceed their permissible values. This can cause deformation and damage to the pipeline. For the safe operation of the pipeline during the period of its undermining, in order to eliminate the hazardous impact of mining the longwall face, additional protection measures must be applied. It is therefore recommended that the gas pipeline between the PK212 and PK214+20 pickets be opened prior to the displacement process (200 m from the stoping face), thus reducing the density of the gas pipeline-soil system. Recommendations for controlling the earth's surface deformations within the natural gas pipeline route are also proposed, which will ensure premature detection of the negative impact of mining operations.
矿产的地下开采伴随着岩体地质力学状况的变化。这会导致岩体内部应力重新分布，并使地表出现意外的位移和变形。大量民用和工业基础设施位于矿区内，矿区内持续进行采矿和隧道作业。采矿作业规划不合理可能导致被破坏设施失去稳定性并遭到毁坏。因此，研究采矿作业期间的地表变形过程非常重要，这能确保安全和可持续的作业条件。本文的研究目标是分析地下采矿活动影响下天然气管道的行为，尤其着重于了解地表水平变形的影响及其对管道安全和结构完整性的潜在影响。根据所发现的地表水平变形参数以及将其与根据采矿地质条件及其破坏程度表征管道铺设条件的允许参数进行比较，来确定管道的性能和安全性。基于确定的天然气管道安全破坏条件，已发现其在PK212 + 40和PK213 + 80（140米）桩号之间的路段，地表水平变形的估算参数超过了允许值。这可能会导致管道变形和损坏。为使管道在被破坏期间安全运行，为消除开采长壁工作面的危险影响，必须采取额外的保护措施。因此，建议在位移过程之前（距采煤工作面200米）打开PK212和PK214 + 20桩号之间的天然气管道，从而降低天然气管道 - 土壤系统的密度。还提出了控制天然气管道线路内地表变形的建议，这将确保及早发现采矿作业的负面影响。
