关键词: 水压支柱, 采矿工艺, 支护强度, 初撑力, 工作阻力, 回归分析

Abstract: It is a typical gently inclined, thin and troublesome ore-body in the deep level of Bainiuchang Mine. When using the overall mining method, it is difficult to manage the ground pressure and the operation safety can’t be ensured. Meanwhile, the loss of pillar left is huge when the room-pillar mining method is used. The roof supporting technology by using individual hydraulic props can be a good technology to solve the above problems. In this paper, the stope with its dimension of 40 m×8 m×4 m was studied by overall mining method and roof supporting technology of hydraulic props. Using slumping arch theory the support intensity and support density were calculated, which are 26.42 kPa and 0.275 root/m2, respectively. Meanwhile, the optimal proper space between hydraulic props is determined as 3 m×1.2 m by the calculation of FLAC3D. During the industrial test, by monitoring and analyzing the data such prop as setting load, sustaining resistance, descending amount of piston, and roof settlement, the roof supporting technology of hydraulic props can well control ground pressure of stope. Moreover, by regression analysis, the proper setting load and sustaining resistance of hydraulic props are 128.36 kN and 150.18 kN.

Key words: hydraulic props, mining technology, support intensity, setting load, sustaining resistance, regression analysis