中文摘要：

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。

英文摘要：

Due to the excavation of roadway, the occurrence mode of water in the fractures of roof strata has changed, which has significantly decreased the strength of roof rock mass under the action of water and tends to induce large deformation of roof even loss of its stability. Field measurement on the occurrence position of roof effluent water and development law of surrounding rock internal fractures has been conducted in water-enriched roadway, and research has also been done on flow characteristics of roof water and variation law of pore water pressure as well as the influences of roof support intensity on the flow characteristics of roof water by means of numerical simulation under the following three conditions, no drain hole existing in the roof, drain hole existing in the roof and drain hole crossing the fissure-plane of roof strata, respectively. Research results have indicated that the occurrence position of roof effluent water locates in the developing area of fissures and it is conducive to drain roof water and control the stability of roof surrounding rock by reasonably arranging technical parameters of water drainage. Based on the above research, the technological principles of controllable water draining and reasonable water retention have been put forward and engineering application has also been conducted.