Advanced directional water exploration and drainage technology for the main inclined shaft excavation of Tianyun Coal Mine
Directional drilling technology is an effective means for exploring and releasing water in coal mine excavation and mining.There are three aquifer threats in the excavation area of the main inclined shaft of Tianyun Coal Minei.In order to provide safety assurance for shaft excavation,this article adopts screw motor directional drilling combined with rotary drilling and transient electromagnetic detection geophysical technology to explore the water richness of the aquifer in the excavation area of the shaft,identify the water richness of the aquifer within a diameter range of 30m around the center line of the shaft.Finally,supplement drilling with construction is carried out for the abnormal areas discovered by geophysical explora-tion to strengthen exploration and drainage.The drilling results show that within the influential range of the main inclined shaft excavation,the aquifer of the Triassic Wayaobao Formation bedrock has weak water richness,low static reserves,and small dynamic recharge.In order to discover local water rich areas,the impact of the aquifer on the shaft excavation is small.The geophysical results show that there is no obviously low resistance anomaly area within a diameter range of 30 m a-round the excavation center of the inclined shaft,indicating that the aquifer of the Triassic Wayaobao Formation bedrock has weak water richness with little impact on the excavation of the shaft.
directional drilling technologyinclined shaft excavationadvanced water exploration and drainagetransient e-lectromagnetic detection technology
万方数据
维普
