River and lake sand collecting detecting instrument and river and lake sand collecting detection method

Abstract

The invention discloses a river and lake sand collecting detecting instrument and a river and lake sand collecting detection method. The method comprises the following steps of: selecting the corresponding length according to the water depth of a probe point, enabling the tail end of the connecting rod to pass through an opening of a core penetrating hammer so as to successively connect with a hammer pad, a touch detecting rod and a probe, vertically inserting a rod body which composed of the parts into water, and enabling the maximum skewness not to be more than a threshold value; hammering the hammer pad according to a scheduled frequency by utilizing the core penetrating hammer until the injection depth of the probe after hammering is less than or equal to the threshold value, recording the hammering times at the moment, if the probe point meets at least two conditions that the hammering time is greater than or equal to n, the injection total depth of the probe is greater than or equal to s meter and the water depth of the probe point is greater than or equal to average depth*m% at present, and judging the probe point on which the sand collecting activity is conducted at present. Through the river and lake sand collecting detecting instrument and the detection method provided by the invention, the sand collecting condition is rapidly accurately detected, and the underwater mining security is guaranteed.

Description

technical field [0001] The invention relates to the technical field of geological exploration, in particular to a river and lake sand mining detector and a detection method. Background technique [0002] In recent years, driven by profit, illegal sand mining has always existed in lakes, rivers and other water bodies, and has been repeatedly banned. The objects of sand mining are mainly sand and gravel in the loose layer. Illegal sand mining mostly uses sand pump type sand dredging ships to insert the sand suction pump into the mud bottom to absorb sand. The ships operate 24 hours a day, and the daily sand mining volume varies from tens The sand mining depth also ranges from a few meters to tens of meters. Illegal sand mining activities not only cause damage to the ecological environment in lakes, rivers and other water bodies, but may also adversely affect the safety of coal mining under water bodies, especially posing a serious threat to the mining of shallow coal seam out...

AI Technical Summary

Problems solved by technology

Illegal sand mining activities not only cause damage to the ecological environment in lakes, rivers and other water bodies, but may also adversely affect the safety of coal mining under water bodies, especially posing a serious threat to mining in shallow outcrop areas of coal seams

[0003] What plays an important role in the safety of coal mining under the water body is the regional key aquifer (group) in the unconsolidated layer, which is used to block the hydraulic connection between the upper aquifer and the lower aquifer; the flooding of sand mining activities may affect the regional key Aquitards cause damage, thereby increasing the risk factor for coal mining under water bodies

[0004] However, in the prior art, there is no more effective method to detect the sand mining of rivers and lakes, so it is impossible to determine whether the key aquifer in the area has been damaged

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