An Investigation Into the Effects of a Retreating Longwall on a Three-entry Gateroad System.
Allwes-RA; Listak-JM; Chekan-GJ
Pro Soc Min Eng AIME 112th Annu Meeting Atlanta, Georgia, 1983 Mar; :95-112
This paper presents the final results of an in-mine study conducted by the Bureau of Mines on a three-entry gateroad system utilizing the stiff-yield pillar design concept. The analyses of roof-to- floor convergence and roof-bolt loading of headgate systems and tailgate chain pillar stresses are presented in detail as the longwall panels were mined. Stress distribution within pillars, relative stress changes between yield and abutment pillars, and the histories of pillar stress, roof-to-floor convergence, and roof-bolt loading as a function of longwall movement are discussed.
Pro. Soc. Min. Eng. AIME 112th Annu. Meeting, Atlanta, Georgia, Mar. 6- 10, 1983, PP. 95-112