赤峪矿深部底抽巷钢管混凝土柱底鼓治理研究

熊怀鑫; 冯利宁; 孙利辉; 彭世龙; 丁斌; 宋家乐; 贺庆丰

赤峪矿深部底抽巷钢管混凝土柱底鼓治理研究

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出版历程
- 发布日期: 2022-12-19

Research on floor heave treatment of steel pipe concrete column in deep bottom drainage roadway in Chiyu Mine

摘要

摘要: 针对深部高应力巷道底鼓严重的问题，以赤峪煤矿北一采区北翼4^#底抽巷为例，研究底抽巷在高应力作用下底板发生非线性大变形的规律，分析巷道底板围岩挤压破坏机理，提出了巷道底板钢管混凝土柱治理底鼓技术；通过数值模拟的方法，分析了底板钢管混凝土柱不同支护长度、角度、排距对巷道底鼓治理的影响。试验结果表明：高应力场、岩体强度低、底板围岩浸水软化以及原支护结构存在缺陷等是导致巷道产生强烈底鼓的主要原因；增强底板围岩支护强度、防治地下水对围岩的渗透以及抑制主动滑移区的滑移变形是治理挤压流动性底鼓的关键；钢管混凝土柱具有强度高、刚度大、抗剪性能好的特点，能有效增强底板围岩支护强度、抑制围岩的挤压变形；底板每排布置2个钢管混凝土柱，长度为6 m、倾角为30°、排距为1.2 m时，对底鼓的控制效果最优。经现场试验验证，钢管混凝土柱治理底鼓技术能有效控制该类巷道底鼓。
- 深部巷道 /
- 挤压流动性底鼓 /
- 钢管混凝土柱 /
- 底鼓治理 /
- 数值模拟
Abstract: Aiming at the serious problem of floor heave of the high-stress deep roadway, take 4# bottom-draining roadway in the north wing of the first mining area of Chiyu Coal Mine as an example, the law of non-linear large deformation of the floor of the roadway under high stress is studied, the mechanism of the crushing failure of the surrounding rock of the roadway floor is analyzed, and the floor heave treatment technology of the roadway floor steel tube concrete column is proposed. Through the method of numerical simulation, the influence of different supporting lengths, angles and row spacings of the concrete-filled steel tube columns on the floor heave of the roadway is analyzed. The test results show that: high stress field, low rock strength, water softening of the surrounding rock of the floor, and defects in the original supporting structure are the main reasons for the strong floor heave of the roadway; the concrete-filled steel tube column has the characteristics of high strength, high rigidity and good shear resistance, which can effectively enhance the supporting strength of the surrounding rock of the floor and restrain the compression deformation of the surrounding rock; when two concrete-filled steel tube columns are arranged in each row of the floor, the supporting length is 6 m, the inclination angle is 30°, and the row spacing is 1.2 m, the deformation of the roadway floor is stable at a small value. Field tests have verified that the bottom heave treatment technology of concrete-filled steel tube columns can effectively control this type of bottom heave.
- deep roadway /
- extruding fluidity floor heave /
- concrete-filled steel tube column /
- heave control /
- numerical simulation

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