麦垛山煤矿副立井井筒检查孔施工技术及涌水量预算

针对井简俭查孔施工中的技术难点，采取了钻前修建钻错底座，使用合理的钻具组合，强化套管作业过程，按照不同地层．选用不同的泥浆配方的技术措施，从而使井筒检查孔的质量达到了设计及规范的要求。根据抽水试验成果．运用稳定流的裘布农公式进行水文地质参数的计算，采用大井法进行井筒涌水量的预算。预算井筒涌水量为6454．96m^3／d．该成果与流量测井结果较为吻合，可以作为建井工程设计的依据。

Auxiliary Shaft Pilot Hole Construction Technology and Shaft Inflow Estimation in Maiduoshan Coalmine

In allusion to technological nodi in pilot hole of shaft construction, technical measures including derrick pedestal construction before drilling, rational combination of drilling string, stress on casing job process, different mud formulae for different strata had adopted, thus to accord with design and code requirements of pilot hole quality. According to pumping test results, calculated hydrogeological parameters by the use of Dupuit equation for steady-state flow, then estimated shaft inflow through ＂virtual large diameter well＂ method. Estimated shaft inflow is 6454.96m^3/d, the result is rather tally with flow rate logging result, can be the base of shaft construction design.