Draw-hole brow line supporting device

• Main Authors: XIA CHANGNIAN, LI SHAOHUI, LIU YUMING, CHEN XIAOWEI, GE QIFA, ZHAO BINGFENG, LIU HUAWU, FENG XINGLONG
• Format: Patent
• Language: English
• Published: 11.11.2015
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention discloses a draw-hole brow line supporting device. The draw-hole brow line supporting device comprises a front I-bar, a rear I-bar, upper connecting pieces, lower connecting pieces, a left supporting piece, a right supporting piece and an upper supporting piece. The left end of the front I-bar and the left end of the rear I-bar stretch into the left side wall of a roadway, and the right end of the front I-bar and the right end of the rear I-bar stretch into the right side wall of the roadway. The upper connecting pieces are arranged on the upper surfaces of the front I-bar and the rear I-bar, and the lower connecting pieces are arranged on the lower surfaces of the front I-bar and the rear I-bar. The front end of the left supporting piece is connected to the rear I-bar, and the rear end of the left supporting piece is connected to the left side wall of the roadway. The front end of the right supporting piece is connected to the rear I-bar, and the rear end of the right supporting piece is connected to the right side wall of the roadway. The lower end of the upper supporting piece is connected to the rear I-bar, and the upper end of the upper supporting piece is connected to the top wall of the roadway. The draw-hole brow line supporting device is high in supporting strength, and can effectively protect a brow line.