CN114791406A - Device and method for monitoring diffusion range of slurry in goaf in slurry filling process - Google Patents

Abstract

The invention relates to the technical field of coal mine waste rock slurry filling, and provides a monitoring device and a method for the diffusion range of slurry in a goaf in the slurry filling process, wherein slurry permeates into a liquid collecting cylinder in the goaf, the change of liquid density in the cylinder is monitored in real time by a liquid density monitoring device, monitoring data is transmitted to a ground data monitoring system through an armored cable in real time, a slurry permeable plate is arranged at the top of the liquid collecting cylinder, so that goaf-caving waste rocks are effectively isolated, and the slurry is ensured to enter the liquid collecting cylinder simultaneously. Constitute the monitoring system of slurry diffusion.

Description

Device and method for monitoring slurry diffusion range in goaf during slurry filling process

technical field

The invention relates to the technical field of coal mine gangue slurry filling, in particular to a device and a method for monitoring the slurry diffusion range in a goaf during the slurry filling process.

Background technique

In recent years, the application of slurry filling technology with the main purpose of treating coal gangue solid waste has been increasing in domestic coal mines. In the process of slurry filling, the diffusion range of slurry has a great influence on the filling amount and filling step distance of a single hole, which directly affects the determination of key parameters of the slurry filling system. However, due to the technical characteristics of this technology, the caving space of the goaf is filled with grouting after the working face is mined, so it is impossible to observe the flow range of the slurry intuitively.

The traditional technical means can peep into the goaf by constructing a peeping hole on the side of the coal pillar to observe whether the slurry flows to the peeping position. However, this method is complicated in process, large in engineering amount, and random in observation results, and can only be observed in the area near the coal pillar, and cannot grasp the diffusion of slurry in the entire working face.

Therefore, the development of a monitoring device for the slurry diffusion range in the goaf during the slurry filling process can realize real-time monitoring of the slurry diffusion range in the entire goaf, and it is of great significance to determine the key parameters of slurry filling. The slurry filling technology system can be further improved.

SUMMARY OF THE INVENTION

Aiming at the problem of difficulty in detecting and sampling the caving space in the goaf behind the working face in the prior art, the present invention provides a device and method for monitoring the slurry diffusion range in the goaf during the slurry filling process. The device has a simple structure and is easy to operate. According to a certain row spacing, it is pre-buried behind the support in advance with the mining of the working face, and the armored cable for transmitting data is connected to the ground data monitoring system using the working face roadway in advance to form a slurry diffusion monitoring system, which can monitor the mined slurry in real time. body flow range.

The present invention is achieved through the following technical solutions:

A slurry diffusion range monitoring device in a goaf during slurry filling, comprising a slurry diffusion range monitoring device body, the slurry diffusion range monitoring device body comprising a liquid collecting cylinder, a liquid density monitoring device and a slurry penetration plate;

The slurry penetration plate is installed on the top of the liquid collecting cylinder, and a plurality of slurry penetration holes are arranged along the side wall of the liquid collecting cylinder;

The liquid density monitoring device is arranged inside the liquid collecting cylinder, and the power supply end of the liquid density monitoring device is connected to the ground data monitoring system through the liquid collecting cylinder through the armored cable.

Preferably, the liquid collecting cylinder has a funnel structure, and the top area of the liquid collecting cylinder is larger than the bottom area of the liquid collecting cylinder.

Further, the size of the plate body area of the slurry penetration plate is set corresponding to the size of the top area of the liquid collecting cylinder.

Preferably, the penetrating plate has a net-like plate structure.

Preferably, the bottom of the liquid collecting cylinder is assembled on a fixed base, the center of the fixed base is provided with a circular hole, and the bottom of the liquid collecting cylinder is inserted into the circular hole.

Further, a cable channel is arranged in the fixed base, and the armored cable connected to the liquid density monitoring device is connected to the ground data monitoring system along the cable channel.

Further, the fixed base is provided with a plurality of slurry penetration holes along the side wall of the circular hole, and the plurality of slurry penetration holes communicate with a plurality of slurry penetration holes on the side wall of the liquid collecting cylinder.

Preferably, the pulp penetration holes are arranged in a mesh structure.

A method for monitoring the diffusion range of slurry inside a goaf during a slurry filling process, based on the above-mentioned device for monitoring the diffusion range of slurry inside a goaf during the slurry filling process, characterized in that it includes the following steps:

During the mining process of the working face, along with the progress of the support, the slurry diffusion range monitoring unit is set at a certain distance behind the support to form a slurry diffusion monitoring system inside the goaf. ; In each column of slurry diffusion range monitoring unit, there are several slurry diffusion range monitoring device bodies, each slurry diffusion range monitoring device body is a measuring point, and the data of each column of measuring points is transmitted to the ground data monitoring system through armored cables;

When slurry filling is performed behind the working face, the slurry flows in the voids of the caving rock in the goaf by means of grouting pressure and gravity;

After the working face is filled with slurry, when the slurry flows into the liquid collecting cylinder through the slurry penetration plate, the density data of each measuring point is monitored in real time by the ground data monitoring system, and the diffusion range of the slurry in the goaf is obtained. distribution pattern.

Preferably, the monitoring method of the ground data monitoring system is as follows:

When the liquid density detected by the liquid density monitoring device in the liquid collecting cylinder is greater than the mine water density, the slurry spreads to the measuring point.

Compared with the prior art, the present invention has the following beneficial technical effects:

The invention provides a monitoring device for the diffusion range of the slurry in the goaf during the slurry filling process. Inside the goaf, the slurry penetrates into the liquid collecting cylinder, and the liquid density change in the cylinder is obtained by real-time monitoring through the liquid density monitoring device. , and transmit the monitoring data to the ground data monitoring system in real time through the armored cable. The slurry penetration plate is installed on the top of the liquid collecting cylinder, which effectively isolates the caving gangue in the goaf and ensures that the slurry enters the liquid collecting cylinder. The invention has the advantages of simple structure, convenient installation, small engineering quantity, and high precision of data information, avoiding the cumbersome work of sampling in drilling construction, and can grasp the diffusion range of the slurry in the goaf in real time while filling the slurry.

Further, the liquid collecting cylinder is in a funnel structure, and the top area of the liquid collecting cylinder is larger than the bottom area of the liquid collecting cylinder, which is convenient for holding the slurry and preventing the slurry from flowing out.

Furthermore, the size of the plate body of the penetrating plate is set corresponding to the size of the top area of the liquid collecting cylinder, so as to avoid the caving gangue falling in the liquid collecting cylinder in the goaf and affecting the monitoring results of the liquid density monitoring device.

Further, the penetrating plate is in the form of a mesh plate structure, which can isolate the caving gangue in the goaf and ensure that the slurry flows into the liquid collecting cylinder.

Further, the bottom of the liquid collecting cylinder is assembled on the fixed base, the center of the fixed base is provided with a circular hole, and the bottom of the liquid collecting cylinder is inserted into the circular hole to improve the placement stability of the liquid collecting cylinder.

Further, a cable channel is provided in the fixed base, and the armored cable connected to the liquid density monitoring device is connected to the ground data monitoring system along the cable channel, so that the armored cable can be connected to the ground data monitoring system through the bottom of the liquid collecting cylinder along the cable channel in the fixed base. The ground data monitoring system is connected, which saves the use space and improves the overall detection effect of the ground data monitoring system.

Further, the fixed base is provided with a number of slurry penetration holes along the side wall of the circular hole, and the slurry penetration holes are connected with the slurry penetration holes on the side wall of the liquid collecting cylinder to isolate the caving gangue in the goaf and ensure the slurry. The function of flowing into the liquid collecting cylinder.

Further, the slurry penetration hole is arranged in a mesh structure, which plays the role of isolating the caving gangue in the goaf and ensuring that the slurry flows into the liquid collecting cylinder.

A method for monitoring the slurry diffusion range in the goaf during the slurry filling process. With the progress of the support, a slurry diffusion range monitoring unit is arranged at a certain distance behind the support, and the single-row slurry diffusion range monitoring unit is arranged in parallel to the working surface. The body of the range monitoring device is a measuring point, the data of each column of measuring points is transmitted to the ground data monitoring system through the armored cable, and the ground data monitoring system judges by the data monitored by each measuring point, which improves the overall efficiency of monitoring. To provide data support for studying the diffusion law of gangue slurry in the goaf and further optimizing the key parameters of filling.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the monitoring device for the slurry diffusion range inside the goaf in the slurry filling process according to the present invention;

Fig. 2 is the top-view structure schematic diagram of the monitoring device for the slurry diffusion range in the goaf in the process of slurry filling according to the present invention;

Fig. 3 is the side view sectional schematic diagram of the device for monitoring the slurry diffusion range in the goaf in the process of slurry filling according to the present invention;

4 is a plan view of the monitoring devices of the present invention arranged in groups in the goaf to form a monitoring system for the dispersion range of slurry.

In the figure: 1- liquid collecting cylinder; 2- fixed base; 3- liquid density monitoring device; 4- slurry penetration hole; 5- slurry penetration plate; 6- armored cable; 7- slurry diffusion range monitoring device body.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Below in conjunction with accompanying drawing, the present invention is described in further detail:

Referring to Fig. 1, in one embodiment of the present invention, a device for monitoring the slurry diffusion range in the goaf during the slurry filling process is provided. The device has a simple structure and is easy to operate. It is buried behind the support, and the armored cable for data transmission is connected to the ground data monitoring system using the working face roadway in advance to form a slurry diffusion monitoring system, which can monitor the goaf slurry flow range in real time.

Specifically, the slurry diffusion range monitoring device includes a slurry diffusion range monitoring device body 7, and the slurry diffusion range monitoring device body 7 includes a liquid collecting cylinder 1, a liquid density monitoring device 3 and a slurry penetration plate 5;

The slurry penetration plate 5 is installed on the top of the liquid collecting cylinder 1, and is used to isolate the caving gangue in the goaf while ensuring that the slurry enters the liquid collecting cylinder 1. A number of slurry penetration holes are arranged along the side wall of the liquid collecting cylinder 1. 4;

The liquid density monitoring device 3 is arranged inside the liquid collecting cylinder 1 to transmit the data of the density sensor in the liquid collecting cylinder 1. The power supply end of the liquid density monitoring device 3 is connected to the liquid collecting cylinder 1 through the armored cable 6. Ground data monitoring system.

Specifically, the liquid collecting cylinder 1 has a funnel structure, and the top area of the liquid collecting cylinder 1 is larger than the bottom area of the liquid collecting cylinder 1, which is convenient for containing the slurry and avoids the slurry flowing out.

Specifically, the size of the plate body of the penetrating plate 5 is set corresponding to the size of the top area of the liquid collecting cylinder 1, as shown in FIG. 2, to prevent the caving gangue from the goaf from falling into the liquid collecting cylinder 1 and affecting the liquid The monitoring results of the density monitoring device 3 .

Specifically, the slurry penetrating plate 5 is in the form of a mesh plate structure, which can isolate the caving gangue in the goaf and ensure that the slurry flows into the liquid collecting cylinder.

Specifically, as shown in FIG. 3 , the bottom of the liquid collecting cylinder 1 is assembled on the fixed base 2 , the center of the fixed base 2 is provided with a circular hole, and the bottom of the liquid collecting cylinder 1 is inserted into the circular hole, which improves the collection efficiency. The stability of liquid cylinder placement.

The fixed base 2 is provided with a cable channel, and the armored cable 6 connected to the liquid density monitoring device 3 is connected to the ground data monitoring system along the cable channel, so that the armored cable 6 can pass through the bottom of the liquid collecting cylinder 1 along the fixed base 2 The inner cable channel is connected with the ground data monitoring system, which saves the use space and improves the overall detection effect of the ground data monitoring system.

The fixed base 2 is provided with a number of slurry penetration holes 4 along the side wall of the circular hole, and a number of slurry penetration holes 4 are communicated with a number of slurry penetration holes 4 on the side wall of the liquid collecting cylinder 1, so as to isolate the caving gangue in the goaf and ensure the The effect of the slurry flowing into the liquid collecting cylinder.

Specifically, the slurry penetration hole 4 is arranged in a mesh structure, which plays the role of isolating the caving gangue in the goaf and ensuring that the slurry flows into the liquid collecting cylinder.

To sum up, the present invention provides a monitoring device for the diffusion range of the slurry inside the goaf during the slurry filling process. Inside the goaf, the slurry penetrates into the liquid collecting cylinder, and the cylinder is obtained by real-time monitoring through the liquid density monitoring device. The density of the liquid inside the body changes, and the monitoring data is transmitted to the ground data monitoring system through the armored cable in real time. The penetrating plate is installed on the top of the liquid collecting cylinder, which effectively isolates the caving gangue in the goaf and ensures the slurry Entering the liquid collecting cylinder, the invention has the advantages of simple structure, convenient installation, small engineering quantity, and high data information accuracy, avoiding the cumbersome work of sampling in drilling construction, and being able to grasp the slurry diffusion in the goaf in real time while filling the slurry. scope.

The present invention also provides a method for monitoring the slurry diffusion range in the goaf during the slurry filling process. Based on the above-mentioned monitoring device for the slurry diffusion range in the goaf during the slurry filling process, the method includes the following steps:

As shown in Figure 4, during the mining process of the working face, along with the progress of the support, the slurry diffusion range monitoring unit is set at a certain distance behind the support to form a slurry diffusion monitoring system inside the goaf, and the single-row slurry diffusion range monitoring unit is parallel to the working face. The layout is in the form of a rhombus; in each column of the slurry diffusion range monitoring unit, there are several slurry diffusion range monitoring device bodies 7, each slurry diffusion range monitoring device body 7 is a measuring point, and the data of each column of measuring points passes through the armored The cable 6 transmits to the ground data monitoring system;

When slurry filling is performed behind the working face, the slurry flows in the voids of the caving rock in the goaf by means of grouting pressure and gravity;

After the working face is filled with slurry, when the slurry flows into the liquid collecting cylinder 1 through the slurry penetration plate 5, the density data of each measuring point is monitored in real time by the ground data monitoring system, and the density of the slurry in the goaf is obtained. Spread and distribution.

Specifically, the monitoring method of the ground data monitoring system is as follows:

When the liquid density detected by the liquid density monitoring device 3 in the liquid collecting cylinder 1 is greater than the mine water density, the slurry spreads to the measuring point.

Example

The coal mining face of a mine is using the slurry filling method to dispose of the gangue in the mine production process. The length of the filling face is 300m, the mine water density is 1.05t/m3, the slurry mass concentration is 70%, and the density is 1.7t/m3. In order to further optimize the key parameters of slurry filling, it was decided to monitor the diffusion range during slurry filling.

In order to use the present invention for monitoring the slurry diffusion range in the goaf in the process of slurry filling, the system is constructed by several monitoring devices and several groups of armored transmission cables.

The main body 7 of the slurry diffusion range monitoring device includes a liquid collection cylinder 1, a liquid density monitoring device 3 and a slurry penetration plate 5. The liquid collection cylinder 1 is in the shape of a funnel, and a slurry penetration board 5 is arranged on the upper part to isolate the goaf. The caving gangue also ensures that the slurry enters the liquid collecting cylinder 1. The side wall of the cylinder is arranged with a number of slurry penetration holes 4, and the slurry penetration holes are evenly arranged along the axial direction of the barrel wall. A liquid density monitoring device 3 is vertically arranged in the liquid collecting cylinder 1 for monitoring the change of liquid density inside the cylinder. The fixed base 2 is connected to the liquid collecting cylinder 1 in a ring shape. A number of slurry penetration holes 4 are evenly distributed on the outer side of the fixed base 2 to communicate with the slurry penetration holes inside the liquid collecting cylinder. The fixed base 2 is arranged with an armored cable channel. The armored cable 6 is used to transmit the data of the density sensor in the liquid collecting cylinder. Each group of monitoring devices shares one armored cable, and the cable data is transmitted to the ground data monitoring system.

The body 7 of the slurry diffusion range monitoring device needs to be pre-buried in groups in the goaf during the mining process of the working face to form a monitoring system. A single monitoring device is arranged in a row parallel to the working face, and the monitoring devices in each row are arranged at a distance of 30m. The spacing between the two rows is 30m, and the monitoring devices are arranged in a diamond shape.

The liquid density monitoring device 3 in the main body 7 of the slurry diffusion range monitoring device can monitor the liquid density change in the liquid collecting cylinder 1 in real time.

The layout and work flow of the constructed slurry diffusion range monitoring system in the goaf during the slurry filling process are as follows:

1. During the mining process of the working face, along with the progress of the support, the slurry diffusion range monitoring device is set at a distance of 30.0m behind the support. The single monitoring device is arranged in a row parallel to the working face, and the layout is in the form of a diamond. Each monitoring device is a measuring point, and the data of each row of measuring points is transmitted to the ground data monitoring system using an armored cable.

2. Fill the back of the working face with slurry, so that the slurry flows in the void of the caving rock in the goaf by grouting pressure and gravity, so as to achieve the purpose of harmless treatment of gangue.

3. After the working face is filled with slurry, use the ground data monitoring system to monitor the density data of each measuring point in real time. If the liquid density read by the monitoring device is greater than the mine water density, it is regarded as the slurry diffused to the measuring point. The monitoring results of all measuring points in the goaf are comprehensively analyzed to obtain the diffusion range and distribution form of the slurry in the goaf.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications or equivalent replacements are made to the specific embodiments of the present invention, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. The device for monitoring the diffusion range of the slurry in the goaf in the slurry filling process is characterized by comprising a slurry diffusion range monitoring device body (7), wherein the slurry diffusion range monitoring device body (7) comprises a liquid collecting cylinder body (1), a liquid density monitoring device (3) and a slurry permeating plate (5);

the pulp permeating plate (5) is installed at the top of the liquid collecting barrel body (1), and a plurality of pulp permeating holes (4) are formed along the side wall of the liquid collecting barrel body (1);

the liquid density monitoring device (3) is arranged in the liquid collecting cylinder (1), and a power supply end of the liquid density monitoring device (3) is connected to a ground data monitoring system through the liquid collecting cylinder (1) through an armored cable (6).

2. The device for monitoring the slurry diffusion range in the goaf in the slurry filling process is characterized in that the liquid collecting cylinder (1) is of a funnel structure, and the top area of the liquid collecting cylinder (1) is larger than the bottom area of the liquid collecting cylinder (1).

3. The device for monitoring the slurry diffusion range in the goaf in the slurry filling process according to claim 2, wherein the plate body area of the slurry permeating plate (5) corresponds to the top area of the liquid collecting cylinder (1).

4. The device for monitoring the diffusion range of the slurry in the goaf in the slurry filling process as claimed in claim 1, wherein the slurry-permeable plate (5) is a net-shaped plate structure.

5. The device for monitoring the slurry diffusion range in the goaf in the slurry filling process is characterized in that the bottom of the liquid collecting cylinder (1) is assembled on a fixed base (2), a round hole is formed in the center of the fixed base (2), and the bottom of the liquid collecting cylinder (1) is inserted into the round hole.

6. The monitoring device for the slurry diffusion range in the goaf in the slurry filling process is characterized in that a cable channel is arranged in the fixing base (2), and an armored cable (6) connected with the liquid density monitoring device (3) is connected to a ground data monitoring system along the cable channel.

7. The device for monitoring the diffusion range of the slurry in the goaf in the slurry filling process according to claim 5, wherein a plurality of slurry permeating holes (4) are formed in the fixing base (2) along the side wall of the circular hole, and the plurality of slurry permeating holes (4) are communicated with the plurality of slurry permeating holes (4) in the side wall of the liquid collecting barrel (1).

8. The device for monitoring the diffusion range of the slurry in the goaf during the slurry filling process as claimed in claim 1, wherein the slurry-permeable holes (4) are arranged in a net structure.

9. A monitoring method for the diffusion range of slurry in a goaf in the slurry filling process is based on the monitoring device for the diffusion range of slurry in the goaf in the slurry filling process of any one of claims 1 to 7, and is characterized by comprising the following steps:

in the stoping process of the working face, slurry diffusion range monitoring units are arranged behind the support at certain intervals along with the support, and a slurry diffusion monitoring system is formed in the goaf; a plurality of slurry diffusion range monitoring device bodies (7) are arranged in each row of slurry diffusion range monitoring units, each slurry diffusion range monitoring device body (7) is a measuring point, and data of each row of measuring points are transmitted to a ground data monitoring system through an armored cable (6);

when slurry is filled behind the working face, the slurry flows in gaps of the caving rocks of the goaf by means of grouting pressure and gravity;

after the working surface is filled with slurry, when the slurry flows into the liquid collecting cylinder (1) through the slurry permeable plate (5), the density data of each measuring point is monitored in real time by using a ground data monitoring system, and the diffusion range and the distribution form of the slurry in the goaf are obtained.

10. The method for monitoring the slurry diffusion range in the goaf in the slurry filling process according to claim 9, wherein the monitoring method of the ground data monitoring system is as follows:

when the liquid density detected by the liquid density monitoring device (3) in the liquid collecting cylinder body (1) is greater than the mine water density, the slurry is diffused to the measuring point.

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