富水巷道顶板水渗流特征数值计算研究

发布时间：2018-04-16 05:15

本文选题：富水巷道 + 顶板水　；参考：《采矿与安全工程学报》2016年01期

【摘要】：巷道开挖改变了顶板岩层裂隙水的赋存形态,水作用下顶板岩体强度削弱显著,易于引起顶板的大变形甚至垮冒失稳。现场实测了富水巷道顶板水出水位置和围岩内部结构,利用数值计算方法研究了富水巷道顶板无疏水孔、有疏水孔和有疏水孔且穿过顶板岩层裂隙面3种情况下,顶板水流动特征、孔隙水压力变化规律及其顶板支护强度对顶板水渗流特征的影响作用。研究表明,富水巷道顶板出水位置位于裂隙发育区域,通过合理布置顶板疏水孔技术参数,有利于顶板水的排放和顶板围岩稳定控制。据此,提出了有控疏水和合理保水的技术原理,并在现场进行了工程应用。
[Abstract]:The excavation of roadway changes the occurrence form of fissure water in roof strata, and the strength of roof rock mass is obviously weakened under the action of water, and it is easy to cause large deformation of roof and even collapse and destabilization.The water outlet position of roof water and the internal structure of surrounding rock in water-rich roadway were measured on the spot. Using the numerical calculation method, the roof of water-rich roadway with no drainage hole, hydrophobic hole and hydrophobic hole and passing through the crack surface of roof rock layer were studied.The characteristics of roof water flow, the variation of pore water pressure and the influence of roof support strength on the seepage characteristics of roof water.The research shows that the outlet water location of the roof of water-rich roadway is located in the area of fissure development. The reasonable arrangement of the technical parameters of the roof drainage hole is beneficial to the drainage of roof water and the stability control of roof surrounding rock.Based on this, the technical principle of controlled drainage and reasonable water retention is put forward, and the engineering application is carried out on the spot.
【作者单位】：中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室;
【基金】：国家自然科学基金青年基金项目(51304208);国家自然科学基金项目(51374197) 江苏高校优势学科建设工程项目
【分类号】：TD745

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