卧龙湖矿顶板砂岩水区域性转移规律实测研究

Field research on regional transfer law of sandstone water from roof in Wolonghu Coal Mine

针对皖北卧龙湖煤矿北一采区顶板K3砂岩水漏失引起工作面异常出水问题,通过对实测水量及工作面开采条件的分析,研究了北一采区顶板K3砂岩水随开采区域尺寸扩大而区域性转移的规律。结果表明,北一采区工作面涌水总量随采动区域的扩大呈现下降趋势,新回采工作面涌水量增大的同时,邻近已采工作面涌水量明显减小,且在水流区域转移开始时间与工作面走向开采尺寸增大的时间同步,8102工作面开始涌水位置与工作面宽度增大位置几乎一致,距离切眼约110m。研究认为卧龙湖矿顶板K3砂岩水漏失后以原出水点为源头,随开采区域尺寸增大和顶板裂隙的发育,以采空区为主通道,向位于深部的新开采工作面进行区域性转移,引起工作面的异常出水。研究结果可为采区后续顶板水害防范提供参考。

To prevent water inrush induced by the leakage of the K3 sandstone water from roof of the first mining area in the north of Wolonghu Coal Mine, according to the analysis of the measured water amount and the mining conditions of the working face, the author studied the regional transfer law of the K3 sandstone water with the expand of the mining area size. The results showed that the total amount of the water inrush in the working face of the first mining area in the north decreased with the enlargement of the mining area, and the water inflow amount increased in the newly stopes, while reduced in the adjacent one at the same time, and the starting time of the regional water transfer was related to the increase of the strike mining size of the working face, the starting position of water inflow was almost same as the width widening position in 8102 working face, which was about 110 m away from the open off cut. It was found that after the leakage from the roof, the K3 sandstone water developed from the original inflow position and regionally transferred to deep new working face through the gob with the help of enlargement of mining area size and development of roof fractures, so it caused the abnormal water inflow in working face. The research results provided a reference for the prevention and control of roof water inrush.