超前预防回采工作面突水技术开发与应用

工作面回采过程中由于采空区侧底板在应力作用下岩石完整性被破坏,裂隙发育,但裂隙具体发育多深,是否能够导通深部奥灰含水层,目前国内研究尚待研究。针对这一问题,以范各庄矿为例,采用超前防范回采工作面突水技术,建立微震监测系统、预留底板水文观测孔、利用矿井水文自动监测系统等手段,监测工作面回采过程中裂隙发育情况、底板含水层水量变化情况以及与深部奥灰含水层连通情况。结果表明,超前预防回采工作面突水技术能够起到预警作用,避免发生突水淹井事故,确保工作面安全回采。

Development and application of advancedwater inrush prevention technology

During the mining process of working face,the rock integrity of the side floor of the goaf is damaged under the stress,and the fractures are developed.However,how deep the fractures are,whether they can lead through the deep Ordovician limestone aquifer is still blank in domestic research.In order to ensure the safety of mining face,the technology of preventing water inrush in mining face in advance was adopted,such as establishing micro-seismic monitoring system,reserving hydrological observation hole on the floor,and using mine hydrological automatic monitoring system to monitor the development of fractures.The results showed that the technology of over-prevention of water breakout at the workings can play an early warning role,avoiding the occurrence of water breakout and flooding accidents and ensuring the safe recovery of the working face.