廖孟光,戴华阳,李梦涛,等. 基于地表敏感变形和房屋因素的矿区建筑物损坏评价方法[J]. 煤炭学报,2024,49(5):2445−2461. doi: 10.13225/j.cnki.jccs.2023.0429
引用本文: 廖孟光,戴华阳,李梦涛,等. 基于地表敏感变形和房屋因素的矿区建筑物损坏评价方法[J]. 煤炭学报,2024,49(5):2445−2461. doi: 10.13225/j.cnki.jccs.2023.0429
LIAO Mengguang,DAI Huayang,LI Mengtao,et al. Mining-induced damage evaluation method of buildings based on surface sensitive deformation and housing factors[J]. Journal of China Coal Society,2024,49(5):2445−2461. doi: 10.13225/j.cnki.jccs.2023.0429
Citation: LIAO Mengguang,DAI Huayang,LI Mengtao,et al. Mining-induced damage evaluation method of buildings based on surface sensitive deformation and housing factors[J]. Journal of China Coal Society,2024,49(5):2445−2461. doi: 10.13225/j.cnki.jccs.2023.0429

基于地表敏感变形和房屋因素的矿区建筑物损坏评价方法

Mining-induced damage evaluation method of buildings based on surface sensitive deformation and housing factors

  • 摘要: 针对目前建筑物采动损坏评价因素的不尽合理与区域性评判结果的局限性,提出基于地表敏感变形和房屋因素的矿区建筑物采动损坏评价方法。采用理论分析、数值模拟和现场调查等方法对建筑物采动损坏评价进行了研究与探讨。首先,采用数值模拟方法,揭示地表变形、建筑物结构类型、主变形方向与建筑物长轴的夹角等因素对建筑物损坏影响规律,模拟结果表明:① 当沿建筑物长轴的变形增大时,建筑物的损坏程度增大,得出了平房建筑加速损伤的地表变形临界值为曲率K=0.6 mm/m2,水平变形ε=6 mm/m;② 不同结构的建筑物损坏程度不同,其中具有圈梁或构造柱的建筑物抗变形能力强,研究并确定了二层砖混结构(圈梁和构造柱)损坏程度的地表临界变形值;③ 建筑物对其长轴方向的地表变形较为敏感,影响损坏大,但对其长轴的垂直方向的变形不太敏感,而变形与建筑物斜交方向的建筑物损坏程度介于2者之间。其次,基于地表敏感变形因素、主变形方向、房屋因素共选取7个评价指标,建立建筑物采动损坏评价的未确知测度模型,根据各评价指标对建筑物的重要程度,采用层次分析法定权;最后,应用于峰峰矿区和徐州矿区3个村庄的建筑物损坏实例,结果表明:在选取的50户140余栋建筑物评价中,预测准确率在80%以上,预测精度高于传统方法,且预测效果良好,弥补了传统评价方法的不足,验证了评价指标选取和评价模型的可靠性。

     

    Abstract: In view of unreasonable evaluation factors and limitations of regional evaluation results of the current mining-induced building damage, a method is proposed for assessing building damage based on surface sensitive deformation and housing factors. Mining-induced building damage evaluation is studied by means of theoretical analysis, numerical simulation and field investigation. Firstly, numerical simulation method is used to reveal the influence rule of surface deformation, building structure type, the angle between the main deformation direction and the long axis of the building on the building damage. The results show that ① when the deformation along the long axis of the building increases, the degree of damage to the building increases. It is obtained the critical value of surface deformation for the accelerated damage of one-story bungalow building is curvature K=0.6 mm/m2 and horizontal deformation ε=6 mm/m. ② The damage degree of buildings with different structures is different, in which the buildings with ring beams or structural columns have a strong deformation resistance. This study has determined the critical surface deformation value of the damage degree of the two-story brick-concrete structure with ring beams and structural columns. ③ The building is more sensitive to the surface deformation in the direction of its long axis, affecting the damage is large. However, the deformation of the perpendicular direction to the long axis of the building is not very sensitive, and the damage degree at the oblique intersection of principal deformation direction and the long axis of houses is in between the two. Secondly, the unascertained measure model of mining-induced building damage is established, and a total of 7 evaluation indicators are selected based on surface sensitive deformation factors, principal deformation direction, and house factors, then the weight is assigned to each indicator using the Analytic Hierarchy Process (AHP) according to its importance. Finally, it is applied to the building damage cases of three villages in the Fengfeng Mining Area and the Xuzhou Mining Area, and the application shows that the prediction accuracy is above 80% in the evaluation of more than 140 buildings in 50 households selected. The prediction accuracy is higher than the traditional method, and the prediction effect is good, which makes up for the shortcomings of traditional evaluation methods and verifies the reliability of the evaluation index selection and the evaluation model.

     

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