CN109882158B - Drilling water pumping level testing method and drilling water level testing device - Google Patents

Abstract

The invention provides a borehole pumping water level test method and a borehole water level test device. The method includes obtaining the initial water level in the borehole; turning on the water pump to perform a single-hole pumping test to obtain observation data of water level restoration; and according to the observation data of water level restoration, Fit the observation curve of water level restoration; obtain the water level of the hole wall according to the observation curve of water level restoration; calculate the elevation difference between the initial water level and the water level of the hole wall to obtain the drawdown value of the borehole water level. Realize the fitting of the water level recovery observation curve, and determine the water level corresponding to the coordinate point with the largest curvature of the water level recovery observation curve as the hole wall water level, which reduces the error of the water level, thereby obtaining accurate water level drawdown, which is used for the calculation of water volume during the exploration process. And evaluation provides accurate parameters to avoid damage caused by wrong hydrogeological parameters.

Description

Borehole pumping water level test method and borehole water level test device

technical field

The invention relates to the technical field of drilling, in particular to a method for testing the pumping water level of a borehole and a device for testing the borehole water level.

Background technique

At present, during the exploration of mineral resources, drilling and pumping precipitation tests are indispensable tasks. The calculation of mine water inflow and groundwater resources will be the daily work of geological exploration. Among them, the drilling water level drawdown value has been It is an essential parameter in the calculation of mine water inflow and groundwater resources.

At present, the water level drawdown of the borehole is mainly measured by measuring the initial water level in the borehole and the lowest point of the water level in the hole, and taking the lowest point of the measured water level in the hole as the center water level of the funnel, and then calculating the initial water level and the funnel The elevation difference of the central water level is used to obtain the borehole water level drawdown value.

Since the water level drawdown value is defined as the difference between the initial water level at the pumping structure and the water level at the center of the funnel, where the water level at the center of the funnel is the lowest point of the water level on the wall of the hole, and the lowest point of the measured water level in the hole is the same as the water level at the center of the funnel as defined There is a big difference between them. The lowest point of the water level in the hole is directly used as the center water level of the funnel, resulting in a large error in the calculated borehole water level drawdown value, and a large error in the hydrogeological parameters obtained through the borehole water level drawdown value. , and the water inflow calculated based on the borehole water level drawdown value and other hydrogeological parameters calculated inversely is far less than the actual water inflow of the shaft or pit, which may easily cause the well shaft or pit to be flooded and die.

Contents of the invention

In view of this, the purpose of the embodiments of the present invention is to provide a borehole pumping water level testing method and a borehole water level testing device, to achieve fitting the water level recovery observation curve, and determine the water level corresponding to the coordinate point with the largest curvature of the water level recovery observation curve It is the funnel center water level, which reduces the error of the defined funnel center water level, so that accurate water level drawdown can be obtained, and accurate parameters are provided for the calculation and evaluation of water inflow in mine pits, and damage caused by errors in hydrogeological parameters is avoided .

In a first aspect, an embodiment of the present invention provides a method for testing a borehole pumping water level, the method comprising:

Obtain the initial water level in the borehole;

Turn on the water pump to conduct a single-hole pumping test to obtain observation data of water level recovery;

Fitting the water level recovery observation curve according to the water level recovery observation data;

Obtaining the water level of the hole wall according to the water level restoration observation curve;

Calculate the elevation difference between the initial water level and the water level of the hole wall to obtain the water level drawdown value of the borehole.

In combination with the first aspect, the embodiment of the present invention provides a first possible implementation of the first aspect above, wherein the turning on the water pump to conduct a single-hole pumping test to obtain observation data of water level restoration includes:

Turn on the water pump for pumping test;

After the pumping operation is performed for a preset period of time, the water pump is turned off, and the water pressure data in the hole after stopping the pumping is obtained through the water pressure sensor;

Converting the restoration water pressure data in the hole into observation data of water level restoration.

In combination with the first aspect, the embodiment of the present invention provides a second possible implementation of the above first aspect, wherein the fitting of the water level restoration observation curve according to the water level restoration observation data includes:

Draw a water level recovery curve according to the water level recovery observation data;

Fitting the water level recovery observation curve according to the water level recovery curve.

In combination with the first aspect, the embodiment of the present invention provides a third possible implementation of the above-mentioned first aspect, wherein the obtaining the water level of the hole wall according to the observation curve of the water restoration position includes:

Establishing a water level recovery curve observation equation according to the water level observation curve;

According to the observation equation of the water level recovery curve, calculate the curvature corresponding to each coordinate point on the water level recovery observation curve;

determining the coordinate point with the largest curvature from the curvatures corresponding to each coordinate point;

The water level corresponding to the determined coordinate point is determined as the hole wall water level.

With reference to the first possible implementation manner of the first aspect, the embodiment of the present invention provides a fourth possible implementation manner of the first aspect above, wherein, after performing the pumping operation for a preset period of time, turning off the water pump, The recovery water pressure data in the hole after stopping pumping is obtained through the water pressure sensor, including:

After performing the pumping operation for a preset period of time, the water pump is turned off, and the water pressure data in the hole is continuously obtained through the water pressure sensor;

Carry out real-time monitoring of the continuously acquired water pressure data in the hole, and stop obtaining the water pressure data in the hole when the continuously obtained water pressure data in the hole is monitored to meet the preset stability conditions;

The in-hole water pressure data acquired during the process from turning off the water pump to stopping the acquisition of in-hole water pressure data is determined as the in-hole recovery water pressure data after stopping pumping.

In a second aspect, an embodiment of the present invention provides a borehole water level test device, the device includes a water pressure sensor, a secondary instrument, a data processor, and a data cable;

The submersible end of the data cable is connected to the water pressure sensor, and the ground end of the data cable is connected to the secondary instrument;

The water pressure sensor is used to collect initial water level and water pressure data in the hole, and transmit the initial water level and water pressure data in the hole to the secondary instrument through the data cable;

The secondary instrument sends a monitoring command to the water pressure sensor through the data cable; receives, stores and displays the initial water level and the water pressure data in the hole transmitted by the water pressure sensor;

The data processor converts the water pressure data in the hole into water level restoration observation data; draws a water level restoration curve according to the water level restoration observation data; fits a water level restoration observation curve according to the water level restoration curve; The observation curve is restored to obtain the water level of the hole wall; the elevation difference between the initial water level and the water level of the hole wall is calculated to obtain the drawdown value of the borehole water level.

With reference to the second aspect, the embodiment of the present invention provides the first possible implementation of the second aspect above, wherein the device further includes a water pump and a metal rod;

The water suction pipe of the water pump is bound together with the metal rod;

The data cable is fixed on the metal pole, and the water pressure sensor is fixedly installed on the diving end of the metal pole.

In combination with the second aspect, the embodiment of the present invention provides a second possible implementation of the second aspect above, wherein the secondary instrument includes a receiving element, a storage element, a control element, a signal key, and a display screen;

The receiving element is respectively connected with the storage element, the display screen and the water pressure sensor, receives the water pressure data in the hole transmitted by the water pressure sensor, and transmits the water pressure data in the hole to the The storage element and the display screen; the storage element is used to store the water pressure data in the hole; the display screen is used to display the water pressure data in the hole;

The control element is respectively connected with the storage element, the display screen, the signal key and the water pressure sensor, receives the trigger signal transmitted by the signal key, and sends a monitoring command to the The water pressure sensor, or according to the trigger signal, retrieves the water pressure data in the hole from the storage element, and transmits the water pressure data in the hole to the display screen.

With reference to the second possible implementation of the second aspect, the embodiment of the present invention provides a third possible implementation of the second aspect above, wherein the signal keys include a watch calibration key, a storage key, a display key, a sample Frequency setting key, water level conversion key and data export key.

With reference to the second possible implementation of the second aspect, the embodiment of the present invention provides a fourth possible implementation of the second aspect above, wherein the secondary instrument further includes a USB interface and a network interface;

The USB interface is used to export the collected initial water level in the borehole and recovery data of the water level in the borehole;

The network interface is used to connect the secondary instrument and the data processor through a wired cable.

In the method and device provided in the embodiments of the present invention, the borehole pumping water level test method includes obtaining the initial water level in the borehole; turning on the water pump to perform a single-hole pumping test, and obtaining the observation data of water level restoration; According to the water level restoration observation curve, the water level of the hole wall is obtained; the elevation difference between the initial water level and the water level of the hole wall is calculated to obtain the water level drawdown value of the borehole; the water level test device of the borehole includes a water pressure sensor, two secondary instrument, data processor and data cable; the submersible end of the data cable is connected to the water pressure sensor, and the ground end of the data cable is connected to the secondary instrument; the water pressure sensor is used to collect the initial water level and water pressure data in the hole, and Transmit the initial water level and water pressure data in the hole to the secondary instrument through the data cable; the secondary instrument sends monitoring commands to the water pressure sensor through the data cable; receives, stores and displays the initial water level and the water pressure in the hole transmitted by the water pressure sensor Water pressure data; data processor, convert the water pressure data in the hole into water level restoration observation data; draw the water level restoration curve according to the water level restoration observation data; fit the water level restoration observation curve according to the water level restoration curve; obtain the hole wall according to the water level restoration observation curve Water level: Calculate the elevation difference between the initial water level and the water level of the hole wall to obtain the drawdown value of the borehole water level. The fitting of the water level recovery observation curve is realized, and the water level corresponding to the coordinate point with the largest curvature of the water level recovery observation curve is determined as the water level of the hole wall, which reduces the error with the defined funnel center water level, so that accurate water level drawdown can be obtained. Accurate parameters are provided for the calculation and evaluation of water inflow in mine pits, and damages caused by errors in hydrogeological parameters are avoided.

In order to make the above-mentioned objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1A shows the flow chart of the borehole pumping water level testing method provided by Embodiment 1 of the present invention;

FIG. 1B shows a flow chart of obtaining observation data for water level restoration provided by Embodiment 1 of the present invention;

Fig. 1C shows the flow chart of obtaining the water level of the hole wall provided by Embodiment 1 of the present invention;

Figure 1D shows the water level recovery curve provided by Embodiment 1 of the present invention, and the water level recovery observation curve;

FIG. 2A shows a schematic structural view of a borehole water level testing device provided in Embodiment 2 of the present invention;

Fig. 2B shows a structural view of the borehole water level testing device provided by Embodiment 2 of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Considering that in the prior art, due to the large difference between the lowest point of the measured water level in the hole and the defined funnel center water level, the lowest point of the water level in the hole is directly used as the center water level of the funnel, resulting in a drop in the calculated water level of the borehole. The error of the depth value is very large, the error of the hydrogeological parameters obtained through the water level drawdown value of the borehole is very large, and the water inflow calculated according to the water level drawdown value of the borehole is far smaller than the actual water inflow in the wellbore and mine pit, so in the exploration In the process, it is easy to cause the shaft or mine to be flooded and the disaster of death. Based on this, the present invention provides a borehole pumping water level testing method and a borehole water level testing device to realize fitting of the water level recovery observation curve, and determine the water level corresponding to the coordinate point with the largest curvature of the water level recovery observation curve as the funnel center water level, The error with the defined funnel center water level is reduced, so that accurate water level drawdown can be obtained, which provides accurate parameters for the calculation and evaluation of mine water inflow during the exploration process, and avoids damage caused by wrong hydrogeological parameters . The following is described by way of examples.

Example 1

Referring to FIG. 1A , an embodiment of the present invention provides a method for testing a borehole pumping water level. The method includes the following steps S101-S105.

Step S101: Obtain the initial water level in the borehole.

Step S102: Turn on the water pump to conduct a single-hole pumping test to obtain observation data of water level restoration.

Step S103: According to the water level observation data, the water level restoration observation curve is fitted.

Step S104: Obtain the water level of the hole wall according to the water level restoration observation curve.

Step S105: Calculate the elevation difference between the initial water level and the water level of the hole wall to obtain the drawdown value of the borehole water level.

In the embodiment of the present invention, before performing a single-hole pumping test on the borehole, it is necessary to obtain the initial water level in the borehole. Among them, to obtain the initial water level in the borehole, first collect the water pressure data of the water level in the borehole through the water pressure sensor, and the water pressure sensor transmits the collected water pressure data to the secondary instrument, and then through the secondary instrument or other water level The converter converts the water pressure data into a corresponding water level value, and the water level value is used as the initial water level in the borehole.

In the above S102 step, during the single-hole pumping test in accordance with industry standards such as exploration specifications and single-hole pumping test standards, the water level observation data can be obtained specifically through the following steps S1021-S1023, as shown in Figure 1B.

Step S1021: Turn on the water pump for water pumping test.

When the water pump is pumping water, the above-mentioned water pressure sensor collects the water pressure data in the hole in real time, and transmits the water pressure data in the hole to the secondary instrument on the ground through the data cable, and the secondary instrument displays and stores the water pumped in the hole. Compress data.

Step S1022: after the pumping operation for a preset period of time, the water pump is turned off, and the water pressure data in the hole after the water pumping is stopped is acquired through the water pressure sensor.

In the above step S1022, the recovery water pressure data in the hole after stopping the water pumping is obtained through the water pressure sensor, which can be obtained specifically through the following steps S10221-S10223.

Step S10221: After the pumping operation is performed for a preset period of time, the water pump is turned off, and the water pressure data in the hole is continuously acquired through the water pressure sensor.

For the preset time period mentioned above, the high-frequency observation of the borehole water level is longer than the minimum time required in the single-hole pumping test standard, which can be 1 hour. After the pumping operation for the preset time, the sampling frequency can then be reduced.

When the water pump is turned off, the secondary instrument sends a monitoring command to the water pressure sensor. After receiving the monitoring command, the water pressure sensor starts to collect water pressure data in the hole according to the sampling frequency included in the monitoring command. Wherein, the sampling frequency is not lower than 5 times/second.

Step S10222: Perform real-time monitoring of the continuously acquired in-hole water pressure data, and stop acquiring in-hole water pressure data when the continuously acquired in-hole water pressure data is monitored to meet the preset stability conditions.

When the water pressure sensor collects the water pressure data in the hole according to the monitoring command, the secondary instrument can receive the water pressure data in the hole transmitted by the water pressure sensor, and make statistics on the received water pressure data in the hole. When the difference between the last two water pressure data in the internal water pressure data is less than or equal to the preset value, it means that the water pressure data in the hole meets the preset stable conditions. At this time, the secondary instrument sends a stop monitoring command to the water pressure sensor, and the water pressure The pressure sensor stops collecting water pressure data in the hole; when the difference between the last two consecutive water pressure data in the statistical water pressure data in the hole is greater than the preset value, it means that the water pressure data in the hole does not meet the preset stability conditions. At this time, The water pressure sensor continues to collect water pressure data in the hole, and the secondary meter calculates the difference between the last two water pressure data in real time until the difference between the last two water pressure data is less than the preset value, and the secondary meter sends to stop monitoring The command is given to the water pressure sensor, and the water pressure sensor stops collecting water pressure data in the hole.

Step S10223: Determine the in-hole water pressure data acquired during the process from turning off the water pump to stopping the acquisition of in-hole water pressure data as the in-hole recovery water pressure data after stopping water pumping.

After the recovery water pressure data in the hole is obtained through the step S1022, the water level recovery observation data can be obtained through the following step S1023.

Step S1023: Convert the restoration water pressure data in the hole into observation data of water level restoration.

After the water level recovery observation data is obtained through the step S102, the water level recovery observation curve can be obtained through the above step S103.

In the above step S103, according to the water level recovery observation data, fitting the water level recovery observation curve can be completed through the following process.

First, the water level recovery curve is drawn according to the water level recovery observation data; then, the water level recovery observation curve is fitted according to the water level recovery curve.

Due to some data with large errors in the obtained water level recovery observation data, the water level recovery curve drawn above is not smooth. At this time, it is necessary to establish a corresponding water level recovery curve equation based on the water level recovery curve. The recovery curve equation is optimized so that a smooth water level recovery curve is drawn according to the optimized water level recovery curve equation, and the smooth water level recovery curve is determined as the water level recovery observation curve.

In the embodiment of the present invention, the drawn water level recovery curve and the fitted observed water level recovery curve are schematically shown in Figure 1D. In Fig. 1D, the equation corresponding to the water level recovery curve is h1=V(t), and the equation corresponding to the water level recovery observation curve is h2=V(t), where V is the water pressure and t is the recovery time.

In the above step S104, the water level of the hole wall is obtained according to the water level recovery observation curve, which can be obtained through the following steps S1041-S1044, as shown in FIG. 1C.

Step S1041: Establish the observation equation of the water level recovery curve according to the water level recovery observation curve.

Step S1042: According to the observation equation of the water level restoration curve, calculate the curvature corresponding to each coordinate point on the water level restoration observation curve.

Step S1043: Determine the coordinate point with the largest curvature from the curvatures corresponding to each coordinate point.

Step S1044: Determine the water level corresponding to the determined coordinate point as the hole wall water level.

In the embodiment of the present invention, the hole wall water level is obtained according to the water level observation curve, and the coordinate point with the largest curvature on the water level recovery observation curve can also be observed by visual inspection, and the water level corresponding to the determined coordinate point is determined as the hole wall water level.

After the hole wall water level is obtained through the above S104, the drilling water level drawdown value can be obtained through the above step S105.

In the embodiment of the present invention, by establishing the water level recovery observation curve, the water level corresponding to the coordinate point with the largest curvature on the water level recovery observation curve is determined as the water level of the hole wall. In this way, the error between the determined water level of the hole wall and the defined funnel center Therefore, the accuracy of the borehole drawdown value calculated according to the water level in the center of the funnel is very high, and the error in calculating the hydrogeological parameters through the borehole water level drawdown value is very small. The water inflow of the mine pit or the water inflow of the shaft calculated by the depth value is more reasonable, which can reduce the probability of flooding and death disasters in the shaft or mine.

In the borehole pumping water level testing method provided in the embodiment of the present invention, the method includes obtaining the initial water level in the borehole; turning on the water pump to perform a single-hole pumping test, and obtaining the observation data of water level restoration; according to the observation data of water level restoration, fitting the water level restoration Observation curve; According to the observation curve of water level recovery, the water level of the hole wall is obtained; the elevation difference between the initial water level and the water level of the hole wall is calculated to obtain the water level drawdown value of the borehole. The fitting of the water level observation curve is realized, and the water level corresponding to the coordinate point with the largest curvature of the water level observation curve is determined as the water level of the hole wall, which reduces the error with the defined funnel center water level, so that accurate water level drawdown can be obtained. The calculation and evaluation of water volume in the process provides accurate parameters and avoids damage caused by wrong hydrogeological parameters.

Example 2

Referring to Fig. 2A or 2B, an embodiment of the present invention provides a borehole water level testing device, which includes a water pressure sensor 1, a secondary instrument 2, a data processor 3 and a data cable 4;

The diving end of the data cable 4 is connected to the water pressure sensor 1, and the ground end of the data cable 4 is connected to the secondary instrument 2;

The water pressure sensor 1 is used to collect the data of the initial water level and the water pressure in the hole, and transmit the data of the initial water level and the water pressure in the hole to the secondary instrument 2 through the data cable 4;

The secondary instrument 2 sends monitoring commands to the water pressure sensor 1 through the data cable 4; receives, stores and displays the initial water level and the water pressure data in the hole transmitted by the water pressure sensor 1;

The data processor 3 converts the water pressure data in the hole into the water level recovery observation data; draws the water level recovery curve according to the water level recovery observation data; fits the water level recovery observation curve according to the water level recovery curve; obtains the hole wall water level according to the water level recovery observation curve; The elevation difference between the initial water level and the water level of the hole wall is used to obtain the drawdown value of the borehole.

In the embodiment of the present invention, the above-mentioned data cable 4 is a waterproof, corrosion-resistant, and anti-interference low-voltage cable. The surface end of the data cable 4 is the end exposed above the ground, and the submersible end of the data cable 4 is the end exposed in the borehole.

When collecting the water pressure data corresponding to the initial water level and the water pressure data in the hole, the above water pressure sensor 1 needs to be placed at a predetermined distance below the water level in the borehole. The water pressure sensor 1 starts to collect water pressure data in the hole according to the monitoring command sent by the above-mentioned secondary instrument 2, wherein the monitoring command includes the collection time and collection frequency.

The above-mentioned secondary instrument 2 is a storage and display device, which sends a monitoring command or a stop monitoring command to the water pressure sensor 1 according to the user's control command or the test program set in advance by the user.

The above-mentioned data processor 3 may be a computer, a mobile phone or a device for processing hydraulic data. The data processor 3 can be set at a remote control center away from the exploration site, and the user can derive the stored water pressure data corresponding to the initial water level and the water pressure data in the hole from the secondary instrument 2, and convert the water pressure data corresponding to the initial water level The pressure data and the water pressure data in the hole are transmitted to the above-mentioned data processor 3 through the network; the data processor 3 can also be set at the exploration site and connected to the secondary instrument 2 through a communication cable, and the secondary instrument 2 passes through the communication cable The water pressure data corresponding to the initial water level and the water pressure data in the hole stored or collected in real time are transmitted to the data processor 3 .

Referring to Fig. 2B, the device also includes a water pump 5 and a metal rod 6;

The water suction pipe of water pump 5 is bound together with metal bar 6.

The data cable 4 is fixed on the metal rod 6 , and the water pressure sensor 1 is fixedly installed on the diving end of the metal rod 6 .

In the embodiment of the present invention, the above-mentioned water pump 5 may be a centrifugal water pump 5 . The distance between the water pressure sensor 1 and the water inlet of the water suction pipe of the above-mentioned water pump 5 is not less than 10m. The above-mentioned data cable 4 is fixed on the metal rod 6, which can prevent the data cable 4 from being sucked into the water suction pipe of the water pump 5 during the single-hole pumping test.

In the embodiment of the present invention, the above-mentioned secondary instrument 2 includes a receiving element, a storage element, a control element, a signal key and a display screen;

The receiving element is respectively connected with the storage element, the display screen and the water pressure sensor 1, receives the water pressure data in the hole transmitted by the water pressure sensor 1, and transmits the water pressure data in the hole to the storage element and the display screen; the storage element is used to store the water pressure data in the hole Internal water pressure data; display screen, used to display the water pressure data in the hole;

The control element is respectively connected with the storage element, the display screen, the signal key and the water pressure sensor 1, receives the trigger signal transmitted by the signal key, and sends a monitoring command to the water pressure sensor 1 according to the trigger signal, or adjusts the water pressure sensor from the storage element according to the trigger signal. Get the water pressure data in the hole and transmit the water pressure data in the hole to the display screen.

The above-mentioned signal keys include a watch calibration key, a storage key, a display key, a sampling frequency setting key, a water level conversion key and a data export key.

The clock calibration key is used to calibrate the time of the water pressure sensor 1. When the user presses this key, the secondary instrument 2 can send a clock calibration command to the water pressure sensor 1, so that the water pressure sensor 1 can adjust its own clock time. To the time that matches the current time of the secondary instrument 2. By checking the clock, it can be ensured that the data stored in the secondary instrument 2 is synchronized with the data collected by the water pressure sensor 1, thereby improving the accuracy of the data.

The above-mentioned storage key is used to store the data transmitted by the water pressure sensor 1. When the user presses this key, the secondary instrument 2 starts to save the data transmitted by the water pressure sensor 1. Press this key again, and the water pressure sensor 1 will start to The data between pressing the key and pressing the key again will be saved in segments, and another segment of data will be saved again. In the embodiment of the present invention, the secondary instrument 2 can also save data according to the time nodes in the program through a preset program.

The above-mentioned display key can display the water pressure data collected by the water pressure sensor 1 in the form of water level in real time, and can also display the water level corresponding to a certain section of water pressure data stored in the secondary instrument 2 .

The above-mentioned sampling frequency setting key can be customized by the user according to the needs of the pumping test. When the user sets the sampling frequency and presses this key, the secondary instrument 2 will send the sampling frequency to the water pressure sensor 1. The sensor 1 collects water pressure data according to the sampling frequency. In the embodiment of the present invention, the secondary instrument 2 can also collect water pressure data according to the frequency set in the program through a preset program.

The above-mentioned water level conversion key is used to convert the water pressure value into the corresponding water level value. In the embodiment of the present invention, when the user presses this key, the secondary instrument 2 can convert the water pressure data transmitted by the water pressure sensor 1 into water level data for display, and the user can set or save the data in the form of water pressure or Data in the form of water levels.

The above-mentioned data export key is used to export the water pressure data or water level data stored in the secondary instrument 2 .

In the embodiment of the present invention, the above-mentioned secondary instrument 2 also includes common keys for testing equipment such as a power switch key, a test start/stop key, and the like.

The above-mentioned secondary instrument 2 also includes a USB interface and a network interface;

USB interface, used to export the collected initial water level in the borehole and recovery data of the water level in the borehole;

The network interface is used to connect the secondary instrument 2 and the data processor 3 through a wired cable.

In the embodiment of the present invention, the above-mentioned network interface can be divided into a wired network interface and a wireless network interface. The above-mentioned secondary instrument 2 can be connected to a nearby local area network or the Internet through the network interface, and the stored water pressure data or The water level data is transmitted to the above-mentioned data processor 3.

In the borehole water level testing device provided in the embodiment of the present invention, the device includes a water pressure sensor, a secondary instrument, a data processor and a data cable; the diving end of the data cable is connected to the water pressure sensor, and the ground end of the data cable Connect the secondary instrument; the water pressure sensor is used to collect the initial water level and the water pressure data in the hole, and transmit the initial water level and the water pressure data in the hole to the secondary instrument through the data cable; the secondary instrument is sent through the data cable Monitor commands to the water pressure sensor; receive, store and display the initial water level transmitted by the water pressure sensor and the water pressure data in the hole; the data processor converts the water pressure data in the hole into the water level recovery observation data; draw the water level according to the water level recovery observation data Restoration curve; fitting the observation curve of water level restoration according to the restoration curve of water level; obtaining the water level of the hole wall according to the restoration observation curve of water level; calculating the elevation difference between the initial water level and the water level of the hole wall to obtain the drawdown value of the borehole water level. The fitting of the water level recovery observation curve is realized, and the water level corresponding to the coordinate point with the largest curvature of the water level recovery observation curve is determined as the water level of the hole wall, which reduces the error with the defined funnel center water level, so that accurate water level drawdown can be obtained. Accurate parameters are provided for the calculation and evaluation of water volume in the exploration process, and damages caused by errors in hydrogeological parameters are avoided.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (8)

1. borehole pumping water level test method, it is characterized in that, described method comprises: Obtain the initial water level in the borehole; Turn on the water pump to conduct a single-hole pumping test to obtain observation data of water level recovery; Fitting the water level recovery observation curve according to the water level recovery observation data; Obtaining the water level of the hole wall according to the water level restoration observation curve; calculating the elevation difference between the initial water level and the water level of the hole wall to obtain a water level drawdown of the borehole; The obtaining of the hole wall water level according to the water level restoration observation curve includes: Establishing a water level recovery curve observation equation according to the water level recovery observation curve; According to the observation equation of the water level recovery curve, calculate the curvature corresponding to each coordinate point on the water level recovery observation curve; determining the coordinate point with the largest curvature from the curvatures corresponding to each coordinate point; Determining the water level corresponding to the determined coordinate point as the hole wall water level; Said turning on the water pump to carry out the single-hole pumping test to obtain the observation data of water level recovery, including: Turn on the water pump for pumping test; After the pumping operation is performed for a preset period of time, the water pump is turned off, and the water pressure data in the hole after stopping the pumping is obtained through the water pressure sensor; Converting the restoration water pressure data in the hole into observation data of water level restoration. 2. The method according to claim 1, wherein the fitting of the water level recovery observation curve according to the water level recovery observation data comprises: Draw a water level recovery curve according to the water level recovery observation data; Fitting the water level recovery observation curve according to the water level recovery curve. 3. The method according to claim 1, characterized in that, after performing the pumping operation for a preset period of time, the water pump is turned off, and the water pressure data in the hole after the pumping is stopped is obtained by the water pressure sensor, including : After performing the pumping operation for a preset period of time, the water pump is turned off, and the water pressure data in the hole is continuously obtained through the water pressure sensor; Carry out real-time monitoring of the continuously acquired water pressure data in the hole, and stop obtaining the water pressure data in the hole when the continuously obtained water pressure data in the hole is monitored to meet the preset stability conditions; The in-hole water pressure data acquired during the process from turning off the water pump to stopping the acquisition of in-hole water pressure data is determined as the in-hole recovery water pressure data after stopping pumping. 4. The borehole water level testing device is characterized in that the device comprises a water pressure sensor, a secondary instrument, a data processor and a data cable; The submersible end of the data cable is connected to the water pressure sensor, and the ground end of the data cable is connected to the secondary instrument; The water pressure sensor is used to collect initial water level and water pressure data in the hole, and transmit the initial water level and water pressure data in the hole to the secondary instrument through the data cable; The secondary instrument sends a monitoring command to the water pressure sensor through the data cable; receives, stores and displays the initial water level and the water pressure data in the hole transmitted by the water pressure sensor; The data processor converts the water pressure data in the hole into water level restoration observation data; draws a water level restoration curve according to the water level restoration observation data; fits a water level restoration observation curve according to the water level restoration curve; Restoring the observation curve to obtain the water level of the hole wall; calculating the elevation difference between the initial water level and the water level of the hole wall to obtain the drawdown value of the borehole water level; The data processor is specifically used to establish a water level recovery curve observation equation according to the water level recovery observation curve; According to the observation equation of the water level recovery curve, calculate the curvature corresponding to each coordinate point on the water level recovery observation curve; determining the coordinate point with the largest curvature from the curvatures corresponding to each coordinate point; Determining the water level corresponding to the determined coordinate point as the hole wall water level; The data processor is specifically used to turn on the water pump for pumping test; After the pumping operation is performed for a preset period of time, the water pump is turned off, and the water pressure data in the hole after stopping the pumping is obtained through the water pressure sensor; Converting the restoration water pressure data in the hole into observation data of water level restoration. 5. The device of claim 4, further comprising a water pump and a metal rod; The water suction pipe of the water pump is bound together with the metal rod; The data cable is fixed on the metal pole, and the water pressure sensor is fixedly installed on the diving end of the metal pole. 6. The device according to claim 4, wherein the secondary instrument comprises a receiving element, a storage element, a control element, a signal key and a display screen; The receiving element is respectively connected with the storage element, the display screen and the water pressure sensor, receives the water pressure data in the hole transmitted by the water pressure sensor, and transmits the water pressure data in the hole to the The storage element and the display screen; the storage element is used to store the water pressure data in the hole; the display screen is used to display the water pressure data in the hole; The control element is respectively connected with the storage element, the display screen, the signal key and the water pressure sensor, receives the trigger signal transmitted by the signal key, and sends a monitoring command to the The water pressure sensor, or according to the trigger signal, retrieves the water pressure data in the hole from the storage element, and transmits the water pressure data in the hole to the display screen. 7. The device according to claim 6, wherein the signal keys include a watch calibration key, a storage key, a display key, a sampling frequency setting key, a water level conversion key and a data export key. 8. The device according to claim 6, wherein the secondary instrument further comprises a USB interface and a network interface; The USB interface is used to export the collected initial water level in the borehole and recovery data of the water level in the borehole; The network interface is used to connect the secondary instrument and the data processor through a wired cable.

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