许厂煤矿3336工作面煤层开采覆岩破坏并行电法监测研究

Study on the parallel electrical monitoring of overlying rock failure in coal seam mining in No.3336 working face of Xuchang Coal Mine

在许厂煤矿3336工作面推进综放开采期间,由于覆岩破坏过程是随着采掘工作的推进而动态发育的,为保证工作面的安全开采,利用直流电并行电法对断层活化导水情况进行动态监测,通过并行电法CT成像监测技术进行实时监测覆岩破坏规律,随着工作面的不断推进,监测区内的岩体变形破坏阶段性明显,分析得出不同时期该煤层开采破坏后导水裂缝带高度范围为40.7~43.8 m。

During the fully mechanized caving mining in No.3336 working face of Xuchang Coal Mine,due to the destruction of overburden develops along with the mining,in order to ensure the safety mining of the working face,DC parallel electrical method is used to dynamically monitor the water conductivity of fault activation,the overburden failure rule is monitored in real time by parallel electrical CT imaging monitoring technology. With the working face advancing,the destruction of rock mass in the monitoring area is obvious,the analysis shows that after the destruction of coal seam mining in different periods,the height of water conducting fractured zone ranges from 40.7 to 43.8 m.