综放工作面老空动水综合防治技术研究

Research on comprehensive prevention and control technology of old air dynamic water in fully-mechanized caving face

芦沟煤矿21煤柱综采工作面位于21采区中部,水文地质条件较复杂,周边全为已回采过的采空区。掘进时分别在上下副巷进行了多轮次探放老空区水,对21煤柱工作面两翼采空区积水进行了有效疏放。郑州“7·20”暴雨后工作面回风巷东帮出现淋水,且大量增加,严重影响工作面安全生产,对此采取了井下超前探放、利用周边废弃井筒建立排水阵地,对井下排水阵地进行增容改造等方案。经过4个月的综合治理,彻底解决了老空水水害,摸索出一套行之有效的治理技术和方案,具有在相同条件下推广的意义。

The fully-mechanized mining face of the 21st coal pillar in Lugou Coal Mine is located in the middle of the 21st mining area,with complex hydrogeological conditions.The surrounding areas are all goaf areas that have been mined out.During excavation,multiple rounds of water exploration were conducted in the upper and lower auxiliary tunnels to effectively release the water in the goaf on both wings of the 21 coal pillar working face.After the"7·20"rainstorm in Zhengzhou,the east side of the air return lane of the working face was drenched with water,which increased in a large number,seriously affecting the safety production of the working face.For this,the underground advanced exploration and drainage,the surrounding abandoned shafts were used to establish drainage positions,and the underground drainage positions were expanded and reconstructed.After 4 months of comprehensive treatment,the water pollution in the old air has been completely solved,and a set of effective treatment technologies and plans have been explored,which has the significance of promoting under the same conditions.