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自1979年至1980年期间,我们在顶板为页岩、砂质页岩的顶层回采巷道中试验了普通木锚杆裸锚支护。现将试验情况介绍如下。 一、试验目的 在顶板为页岩、砂质页岩的沿顶巷道中,多年来峰峰三矿一直采用传统的梯形断面,木棚子支护。实践证明,这种巷道断面和支护形式存在着一些缺点,如支架是等待顶板变形来压后被动的支护顶板;顶帮围岩处于荷载状态;顶裂帮松,不够安全;顶板下沉量大,顶帮压力较大;材料
From 1979 to 1980, we experimented with bare anchor support for common wood anchors in the top mining roadway where the roof is shale and sandy shale. Now test the situation described below. First, the purpose of the experiment In the roof for the shale, sandy shale along the roadway, Fengfeng mine for many years has been using the traditional trapezoidal cross-section, wood shackle support. Practice has proved that there are some shortcomings such as roadway section and support form, such as support is waiting for the deformation of the roof to push the passive support roof; roof to help the surrounding rock in a loaded state; cracking crack loose, not safe enough; roof sinking Large amount of top pressure to help; material