风氧化带下“四含”及断层地面区域探查治理技术

Exploration and Governance Technology for "Fourth Aquifer" and Fault Ground Regions Under Wind Oxidation Zone

  • 摘要: 为消除青东煤矿七采区浅部煤层开采过程中新生界松散层第四含水层以及区域断层带来的潜在水害风险,确保工作面与巷道能够安全掘进,采用地面定向多分支水平孔沿风氧化带下稳定基岩顺层钻进技术,开展断层及裂隙通道的探查与治理工作。通过对随钻γ录井、钻时异常、钻井液消耗量等参数进行分析,确认断层控制情况与设计基本相符;随后结合长观孔水位变化、压水注浆过程监测、浆液扩散范围检测以及结石率测试等多维度手段,对治理效果进行验证。结果显示,注浆治理效果良好,浆液扩散距离和结石率均满足要求。

     

    Abstract: In order to eliminate the potential water hazard risk caused by the fourth aquifer and regional faults of the Cenozoic loose strata during the shallow coal seam mining process in the seventh mining area of Qingdong Coal Mine, and ensure the safe excavation of working faces and roadways, the ground directional multi-branch horizontal hole bedding drilling technology along stable bedrock under wind oxidation zone is adopted to carry out exploration and governance work of faults and fissure channels. By conducting analysis on parameters such as γ logging during drilling, abnormal drilling time, drilling fluid consumption amount and others, it is determined that the fault control situation is basically consistent with the design; Subsequently, combined with multi-dimensional methods such as monitoring water level changes of long observation holes, monitoring the process of pressurized water grouting, detecting the slurry diffusion range, and testing the stone rate, etc, the governance effect is verified. The results indicate that the grouting governance effect is good, and the slurry diffusion distance and stone rate both meet the requirements.

     

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