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    • 3. 发明授权
    • Method for fabricating a truss member for a mine roof support
    • 一种用于制造用于矿山屋顶支架的桁架构件的方法
    • US5450663A
    • 1995-09-19
    • US142710
    • 1993-10-26
    • Frank Calandra, Jr.Jerry E. FreaseLajos KovacsJohn C. StankusEugene H. Stewart
    • Frank Calandra, Jr.Jerry E. FreaseLajos KovacsJohn C. StankusEugene H. Stewart
    • E21D11/00B23P11/00
    • E21D11/006Y10T29/49845
    • A pair of truss brackets are secured to the roof of an underground passage adjacent to opposing ribs of the passage. The truss brackets each include a roof engaging surface and a truss supporting arm member extending from the roof engaging surface. A pair of U-bolts are supported by the arm members of the truss brackets. Each arm member extends horizontally from the truss bracket to an enlarged end portion of the arm member. The U-bolt is horizontally movable in a vertically hanging position on the arm member and is restrained by the enlarged end portion from disengagement from the arm member. The U-bolts are pivoted on the truss brackets to a horizontal position for connection to truss members which are connected to each other and tensioned to apply an uplifting force to the roof. As the truss members are connected and tensioned, the U-bolts are retained for a range of horizontal movement on the arm members to facilitate adjustments in the position of the U-bolts on the truss brackets.
    • 一对桁架支架固定在与通道的相对肋相邻的地下通道的屋顶上。 桁架支架各自包括屋顶接合表面和从屋顶接合表面延伸的桁架支撑臂构件。 一对U型螺栓由桁架支架的臂构件支撑。 每个臂构件从桁架支架水平延伸到臂构件的扩大的端部。 U型螺栓在臂构件上的垂直悬挂位置上可水平移动,并被扩大的端部约束而不与臂构件分离。 U型螺栓在桁架支架上枢转到水平位置,用于连接到桁架构件,桁架构件彼此连接并张紧以向屋顶施加提升力。 当桁架构件被连接和张紧时,U形螺栓被保持在臂构件上的水平移动范围以便于调节桁架支架上的U形螺栓的位置。
    • 6. 发明授权
    • Method and apparatus for supporting a mine roof
    • 用于支撑矿顶的方法和装置
    • US5302056A
    • 1994-04-12
    • US962255
    • 1992-10-16
    • Frank Calandra, Jr.Jerry E. FreaseLajos KovacsJohn C. StankusEugene H. Stewart
    • Frank Calandra, Jr.Jerry E. FreaseLajos KovacsJohn C. StankusEugene H. Stewart
    • E21D11/00E21D20/00
    • E21D11/006Y10T29/49845
    • A pair of truss brackets are secured to the roof of an underground passage adjacent to opposing ribs of the passage. The truss brackets each include a roof engaging surface and a truss supporting arm member extending from the roof engaging surface. A pair of U-bolts are supported by the arm members of the truss brackets. Each arm member extends horizontally from the truss bracket to an enlarged end portion of the arm member. The U-bolt is horizontally movable in a vertically hanging position on the arm member and is restrained by the enlarged end portion from disengagement from the arm member. The U-bolts are pivoted on the truss brackets to a horizontal position for connection to truss members which are connected to each other and tensioned to apply an uplifting force to the roof. As the truss members are connected and tensioned, the U-bolts are retained for a range of horizontal movement on the arm members to facilitate adjustments in the position of the U-bolts on the truss brackets.
    • 一对桁架支架固定在与通道的相对肋相邻的地下通道的屋顶上。 桁架支架各自包括屋顶接合表面和从屋顶接合表面延伸的桁架支撑臂构件。 一对U型螺栓由桁架支架的臂构件支撑。 每个臂构件从桁架支架水平延伸到臂构件的扩大的端部。 U型螺栓在臂构件上的垂直悬挂位置上可水平移动,并被扩大的端部约束而不与臂构件分离。 U型螺栓在桁架支架上枢转到水平位置,用于连接到桁架构件,桁架构件彼此连接并张紧以向屋顶施加提升力。 当桁架构件被连接和张紧时,U形螺栓被保持在臂构件上的水平移动范围以便于调节桁架支架上的U形螺栓的位置。