Study on Numerical Simulation of Roadway Backfill under Freeway Based on FLAC^3D

Abstract

Based on the paste-like roadway backfill technology in the study of coal mining under the freeway in Tang’an Mine, the mining scheme of coal under the freeway is described. In order to grasp the change law of the stress and damage degree of coal pillars and surrounding rocks during the coal mining process of roadway backfill, analyze the stability of coal pillars and the amount of roof subsidence, using FLAC3D numerical simulation method, select the width of coal pillar elastic plastic zone, the vertical stress of the column and the vertical displacement of the roof are used as indicators. The influence of the 15m temporary coal pillar width on the stability of the coal pillar, the stress distribution of the surrounding rock and the sinking of the roof under the mining method are studied to verify the feasibility of the mining scheme.

Simulation of Logistics Frequent Path Data Mining Based on Statistical Density

“…In algorithmic terms, a publicly recognized data set tests and evaluates the computational power to solve a problem. It contains the best test data for a particular problem and the best solution for a problem [10][11][12][13][14].…”

Mechanism of Rockburst Prevention in Deep Thick Coal Seams with Cemented Paste Backfill: A Case Study

“…The CPB has been used in many fields, which has great potential in maintaining stability of surrounding rock [20][21][22]. Numerous analytical solutions and numerical simulations have been carried out on CPB regarding its characteristics and usage in underground mines [23][24][25][26]. The backfill body can effectively avoid the formation of the concentrated stress during mining operations, thereby actively preventing and controlling rockburst events.…”