Environment-friendly core drilling method for complex sandy cobble stratum

Abstract

The invention discloses an environment-friendly core drilling method for a complex sandy cobble stratum. The environment-friendly core drilling method comprises the step that an environment-friendly core drilling machine is configured and debugged, negative-pressure suction is generated by an environment-friendly recovering system which is completely in butt joint with a drill rod and a casing ofthe environment-friendly core drilling machine, thus, various impurities, such as solid-liquid dust, sprayed out by the top end of the casing during construction are recovered, then a solid-liquid part is separated out, gas dust is filtered and collected, and the effect of clean air discharging is achieved. According to the environment-friendly core drilling method, through a double-driving hydraulic motor set and a double-driving hydraulic pump set, the output speed of the drilling machine is adjusted, four rotating-speed modes can be achieved through in-pair combination, the speed adjustingrange is wider, the low-rotating-speed percussive-rotary drilling demand is met, the high-rotating-speed diamond rotary drilling demand can be met, the method is high in efficiency and higher in application function, and by arranging the environment-friendly recovering system, the impurities generated during drilling are recovered and treated to avoid the situations that the surrounding environment is polluted and health of operating personnel is influenced.

Description

technical field [0001] The invention relates to the technical field of exploration and coring, in particular to an environment-friendly drilling and coring method for complex sand and pebble formations. Background technique [0002] Railway engineering survey occupies a very important position in railway construction and is the most basic work in the entire railway construction project. It not only directly affects the rationality of the entire design scheme, but also directly relates to the budget of the entire railway project. Therefore, it is particularly important to obtain complete, accurate and reliable core data from the borehole as much as possible. [0003] In the investigation of railway engineering, we often encounter accumulation strata formed by geological phenomena such as weathering and transportation, such as weathering, river bed, glacier ice water, landslide, engineering backfill and other accumulation strata. Accumulation of filling materials such as crus...

AI Technical Summary

Problems solved by technology

[0005] However, what kind of drilling rig to use can meet the technical requirements of percussion coring and tube drilling technology for core collection in complex sandy pebble formations has always been a key research issue for those skilled in the art. At the same time, a large number of broken particles and Dust, a large amount of water is ejected from the top of the casing in the formation rich in groundwater, which has adverse effects on the construction environment and the health of operators

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