Probe rod device for detecting development degree of overlying strata fracture deep part of coal face

Abstract

The utility model discloses a feeler lever device for detecting the development degree of the deep part of an overlying strata fracture of a coal face, which comprises a feeler lever main body, a peeping probe, an air pressure sensor, a ring rod isolation bag and a depth metering stranded wire, the feeler lever main body is provided with an axial through wire hole, the peeping probe is arranged at the initial end of the feeler lever main body, the air pressure sensor is arranged in the middle of the feeler lever main body, and the depth metering stranded wire is arranged in the middle of the feeler lever main body. One end of the depth metering stranded wire penetrates through the wire hole and is connected to the initial end of the probe rod main body, the peeping probe and a data wire of the air pressure sensor are wound and bound on the depth metering stranded wire and are connected with external equipment, and the two ring rod isolation bags are respectively arranged on the outer wall of the probe rod main body in a sleeving manner. The hole wall crack development condition is preliminarily observed through the peeping probe, whether further detection is needed or not is judged, then the probe rod is conveyed to the designated depth through the depth metering stranded wire, the crack development degree continues to be detected, the detection time is saved, the detection efficiency is improved, opposite sealing hole sections are formed after the two ring rod isolation bags are inflated and swelled, and the detection efficiency is improved. And the fracture development degree detection accuracy is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine fissure detection, in particular to a probe device for detecting the deep development degree of overburden fissures in a coal mining working face. Background Art

[0002] Research on the extent of fracture development has important engineering applications for the design and construction of underground projects. During coal mining, the original ground stress balance is disrupted, overburden stress is redistributed, and stress concentrations in certain areas, resulting in fractures, are concentrated. Furthermore, due to factors such as rock movement, ground pressure activity, mining methods, and goaf, the generation and development of overburden fractures are subject to uncertainty. Low-cost methods for determining the extent of overburden fracture development primarily rely on inferences based on field observations and observations of cracks in borehole walls. Numerical simulations of stress changes in the rock mass during mining can only provide preliminary predictions of fracture development. Furthermore, the equipment required for precise determination methods such as geological radar detection and acoustic emission monitoring is relatively expensive. Therefore, the development of a probe device is valuable for efficiently, cost-effectively, and accurately detecting the deep extent of overburden fracture development, which is crucial for ensuring mine safety and improving resource recovery rates.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of high cost of detection equipment or vague detection results in the process of detecting the development degree of overburden cracks, and to provide a probe rod device for the deep development degree of overburden cracks in coal mining working faces with low equipment cost, simple structure and good detection effect.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] A probe device for detecting the deep development degree of overburden cracks in a coal mining working face includes a probe body, a peep probe, an air pressure sensor, a ring rod isolation bag, and a depth measuring stranded wire. The probe body is in the shape of a long rod, and the probe body is provided with an axially penetrating wire hole. The peep probe is installed at the starting end of the probe body, and the air pressure sensor is installed in the middle of the probe body. One end of the depth measuring stranded wire passes through the wire hole and is connected to the starting end of the probe body. The data line of the peep probe and the air pressure sensor is wrapped around the depth measuring stranded wire and connected to an external device.

[0007] There are two ring rod isolation bags, which are respectively mounted on the outer wall of the probe rod body and connected to the bag air supply duct inside the probe rod body. A main air supply duct is provided inside the probe rod body, and a number of air outlets connecting the main air supply duct with the outside world are provided on the outer wall of the probe rod body, and the air outlets are located between the two ring rod isolation bags. The main air supply duct and the bag air supply duct are both blind holes, and are both connected to the air pump through an air duct.

[0008] Furthermore, two ring rod isolation bags are respectively sleeved on the outer wall of the probe body at 1 / 4 and 3 / 4 of the long axis.

[0009] Furthermore, the openings of the main air supply duct and the bag air supply duct are both provided with air duct slots that match and connect with the air duct.

[0010] Furthermore, a metal mesh is provided on the air outlet.

[0011] Furthermore, the cross section of the probe body is circular, the diameters of the bag air supply channel and the wire hole are 1 / 10 of the diameter of the rod body, and the diameter of the main air supply channel is 2 / 5 of the diameter of the rod body.

[0012] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art.

[0013] The utility model can firstly observe the development of cracks in the hole wall through the peep probe, judge whether it is necessary to further detect the deep development degree of the cracks, and send the probe to the specified depth through the depth gauge strand to detect the development degree of the cracks at a fixed point or a fixed section, further saving the detection time and improving the detection efficiency. In addition, after the two ring rod isolation bags are inflated, a relatively sealed hole section is formed, and the air outlet and the air pressure sensor discharge air and measure pressure in a relatively sealed space, thereby ensuring the accuracy of the detection of the development degree of the cracks in the sealed hole section.

[0014] The utility model has the advantages of sophisticated structural design, low cost, easy use and high practical application and promotion value.

[0015] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic cross-sectional view of the probe body of the utility model.

[0019] In the figure: 1-peeping probe; 2-probe body; 3-metal mesh; 4-air outlet; 5-air pressure sensor; 6-ring rod isolation bag; 7-depth gauge stranded wire; 8-wire hole; 9-main air supply duct; 10-air duct slot; 11-bag air supply duct.

[0020] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0023] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Example

[0024] like Figure 1-2 As shown, the probe rod device described in this embodiment for detecting the deep development degree of overburden cracks in a coal mining working face includes a probe rod body 2, a peep probe 1, an air pressure sensor 5, a ring rod isolation bag 6, and a depth measuring stranded wire 7. The probe rod body 2 is in the shape of a long rod, preferably a round rod, that is, the cross-section of the probe rod body 2 is circular, and an axially penetrating wire hole 8, a main air supply duct 9 and a bag air supply duct 11 are provided inside the probe rod body 2.

[0025] The peep probe 1 is mounted at the beginning of the probe body 2 (the end inserted into the hole), and the air pressure sensor 5 is mounted in the middle of the probe body 2. One end of a depth gauge cable 7 passes through a cable hole 8 and is connected to the beginning of the probe body 2. The other end can be retracted to allow the probe body 2 to be lowered into the hole through the depth gauge cable 7. The data cable between the peep probe 1 and the air pressure sensor 5 is wrapped around the depth gauge cable 7 and connected to external equipment to ensure a stable data connection.

[0026] There are two ring rod isolation bags 6, which are respectively mounted on the outer wall of the probe body 2 and connected to the bag air supply duct 11 inside the probe body 2. In this example, the two ring rod isolation bags 6 are respectively mounted on the outer wall of the probe body 2 at 1 / 4 and 3 / 4 of the long axis. Referring to the attached diagram, a closed inflation section is formed between the two bags. Five air outlets 4 are provided on the outer wall of the probe body 2 to connect the main air supply duct 9 with the outside world, and the air outlet 4 is located between the two ring rod isolation bags 6, that is, in the 1 / 4 to 3 / 4 section of the long axis of the probe body 2. When the two bags are inflated, an inflation space will be formed in this section. Preferably, a metal mesh 3 is provided on the air outlet 4 to prevent rock fragments from clogging the air outlet or entering the probe main air supply duct 9 to affect the air injection efficiency.

[0027] Here, the main air supply duct 9 and the bag air supply duct 11 are both blind holes, and are connected to the air pump through an air duct to facilitate the control of inflation and deflation. The main air supply duct 9 and the bag air supply duct 11 are both provided with an air duct slot 10 that matches the air duct. The air duct slot 10 is conducive to the stable connection of the air duct. When injecting air, the air duct and the probe rod maintain a stable connection, ensuring that the air duct can stably inject air into the probe rod. In this example, the diameter of the bag air supply duct 11 and the wire hole 8 is 1 / 10 of the diameter of the rod body 2, and the diameter of the main air supply duct 9 is 2 / 5 of the diameter of the rod body 2. Of course, it can also be set according to actual needs.

[0028] During use, the probe is inserted into the hole. The peep probe 1 is first used to initially observe the development of cracks in the hole wall and determine whether further exploration of the depth of the cracks is required. If further exploration is required, the probe is further extended into the hole to a depth of 1 / 2 the probe length via the depth gauge strand 7, so that the pressure sensor 5 can be moved to the desired depth. A certain volume of air is injected into the bag air supply duct 11, causing the two ring-rod isolation bags 6 to inflate and fit against the hole wall, forming a sealed hole section that is relatively isolated from the inside of the hole. Once the sealed hole section is relatively sealed, air is injected into the main air supply duct 9, and the air is discharged from the air outlet 4 of the rod body into the sealed hole section. After air injection, the depth of the cracks in the sealed hole section can be determined by observing the air injection time required for the air pressure measured by the air pressure sensor 5 to reach a certain value. For example, if the air injection time is short and the air pressure value measured by the air pressure sensor 5 is too high, the crack development degree at that location is judged to be low. Similarly, if the air injection time is long and the air pressure value measured by the air pressure sensor 5 is low, the crack development degree at that location is judged to be high. It should be noted that the judgment method here only provides a reference scheme. Of course, other methods can also be used, such as the relationship curve between air pressure and inflation time.

[0029] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A probe device for detecting the deep development degree of overburden cracks in a coal mining face, characterized in that: The invention comprises a probe body (2), a peep probe (1), an air pressure sensor (5), a ring rod isolation bag (6), and a depth gauge stranded wire (7). The probe body (2) is in the shape of a long rod, and the probe body (2) is provided with an axially penetrating wire hole (8). The peep probe (1) is installed at the beginning of the probe body (2), and the air pressure sensor (5) is installed in the middle of the probe body (2). One end of the depth gauge stranded wire (7) passes through the wire hole (8) and is connected to the beginning of the probe body (2). The data line of the peep probe (1) and the air pressure sensor (5) is wrapped around the depth gauge stranded wire (7) and connected to an external device. There are two ring rod isolation bags (6), which are respectively sleeved on the outer wall of the probe rod body (2) and connected to the bag air supply duct (11) in the probe rod body (2). A main air supply duct (9) is provided in the probe rod body (2), and a plurality of air outlets (4) are provided on the outer wall of the probe rod body (2) to connect the main air supply duct (9) with the outside world, and the air outlets (4) are located between the two ring rod isolation bags (6). The main air supply duct (9) and the bag air supply duct (11) are both blind holes and are connected to the air pump through an air duct.

2. A probe device for detecting the deep development degree of overburden cracks in a coal mining face according to claim 1, characterized in that: The two ring rod isolation bags (6) are respectively sleeved on the outer wall of the probe rod body (2) at 1 / 4 and 3 / 4 of the long axis.

3. The probe device for detecting the deep development degree of overburden cracks in a coal mining face according to claim 1 is characterized in that: The main air supply duct (9) and the bag air supply duct (11) are both provided with air duct slots (10) that are matched and connected to the air duct.

4. The probe device for detecting the deep development degree of overburden cracks in a coal mining face according to claim 1 is characterized in that: A metal mesh (3) is provided on the air outlet (4).

5. The probe device for detecting the deep development degree of overburden cracks in a coal mining face according to claim 1 is characterized in that: The cross section of the probe body (2) is circular, the diameters of the bag air supply channel (11) and the wire hole (8) are 1 / 10 of the diameter of the rod body (2), and the diameter of the main air supply channel (9) is 2 / 5 of the diameter of the rod body (2).

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