自动补水法预防井筒破裂工程效果分析

Analysis on Effect of Automatic Water Refilling Method Applied to Prevent Mine Shaft Cracking

为了预防立井井筒发生破裂并避免传统治理方法的缺点,根据井筒破坏机理,以及东滩煤矿地层结构特征,提出了通过上组含水层补充中下组含水层预防井筒破裂的自动补水法,并建立了一套完善的监控工程体系。通过对东滩煤矿西风井进行预防治理,并对补水前后含水层水位、地层内部变形和井壁稳定状态等进行监测分析,结果表明自动补水法可以有效解决含水层水位不断下降的问题,改善松散层的受压状态,实现对井壁破裂的预防和治理。

In order to prevent cracks occurred on the mine shaft or to avoid shortages of the conventional treatment method,based on the failure mechanism of the mine shaft and strata structure features of Dongtan Mine,the paper provided an automatic water refilling method with a upper group aquifer to refill the down group aquifer to prevent the cracking on the mine shaft. And a set of a perfect monitoring and control engineering system was established. With a prevention and control conducted on the West Mine Ventilation Shaft of Dongtan Mine,a monitoring and measuring analysis was conducted on a water table of the aquifer before and after the water refilling,strata internal deformation and mine shaft liner stability status. The results showed that the automatic water refilling method could effectively solve a water table continuous dropping problems of the aquifer,could improve the pressurization status of the soft stratum,could realize the cracks prevention and control of the mine shaft cracking.