Application Study on the Dynamic Prediction Model for Determining the Mining Subsidence

• Main Authors: H.F. HU, X.G. LIAN, Y. LI
• Format: Article
• Language: English
• Published: Eastern Macedonia and Thrace Institute of Technology 2016-04-01
• Series: Journal of Engineering Science and Technology Review
• Subjects: Mining subsidence; Dynamic prediction model; Delay influence; Advancing position; Temporal spatial change
• Online Access: http://www.jestr.org/downloads/Volume9Issue2/fulltext13922016.pdf
• ISSN: 1791-2377; 1791-2377

The movement and deformation of the overlying strata and surface induced by underground mining are processes involving temporal and spatial changes, which, in turn, cause damage to buildings. Estimating the dynamic ground movement and deformation is important to ascertain the damage degree of buildings. To predict the dynamic ground subsidence caused by underground coal mining and protect ground buildings from dynamic damage, a dynamic prediction model was established to calculate ground deformation. A derivation of the dynamic subsidence prediction model based on Knothe’s dynamic subsidence hypothesis and Litwiniszyn's stochastic medium theory was proposed under the conditions of constant advancing speed mining and post-mining. The composition and significance of the dynamic model were analyzed and provided a basis for calculating the dynamics and programming implementation. Through case studies, the dynamic prediction model was verified and the expected results were obtained during mining and post-mining. Results showed the dynamic prediction model is fit for the normal geological condition of mining but is limited for the special geological condition, that is, thick loose layer and thick bedrock. The study can meet the demand of protecting ground buildings from deformation caused by underground mining. The proposed model solves the time issue in mining subsidence prediction.