Analysis of the Applicability of the Convergence Control Method for Gateroad Design Based on Conducted Underground Investigations

摘要

The stability of gateroads is one of the key factors for the mining process of hard coal by a longwallsystem. Wrong designed and applied the gateroad support at the stage of drilling, may adversely affectthe functionality of the gateroad and the safety of the crew throughout its existence.The article presents the results of the underground tests and observations such as: convergence ofthe gateroad, stratification and the fractured zone range in the roof rocks, carried out in four longwallgateroads at the stage of their drilling.The obtained test results were the basis for the assessment of the possibility of using a convergencecontrol method in the design of the gateroad support. The method is based on three interdependent relationships, such as: Ground Reaction Curve (GRC), Longitudinal Displacement Profile (LDP), and a SupportCharacteristic Curve (SCC). All calculations were performed using numerical modeling in the Phase2program, based on the finite element method (FEM).