【摘要】 分析了某矿-850 m二采区轨道下山围岩变形破坏机理,指出围岩在强构造应力作用下的碎胀性和长期流变特性是导致该类巷道变形破坏、难支护的主要原因。提出了高强、高预紧力锚杆支护和注浆加固的控制技术。现场应用表明,-850 m二采区轨道下山采用高强、高预紧力锚杆支护和注浆加固支护方式后,不但可以明显限制围岩的碎胀变形,而且还能有效控制围岩的长期流变,保证巷道的长期稳定。更多还原

【Abstract】 This article analyses the mechanism of deformation and failure of the surrounding strata of the track dip-roadway of No.2 mining section at-850m in a certain coal mine.The article points out that bulking deformation and long-term rheological properties of the surrounding rock under the action of strong tectonic stress are the main causes leading to such roadway’s deformation,destruction and difficulty in its support.Hence the paper puts forward the technique of high strength and high pre-tightening force bolt-net supporting and the grouting reinforcement as a control technology.Field practice indicates that once the above-mentioned control technology is applied,not only the bulking deformation of surrounding rock is checked,but also the long-term rheological changes are controlled,thus the long-term stability of such roadway is ensured.更多还原