Coal mine tunnel pressure relief system

Abstract

The invention provides a coal mine roadway pressure relief system which is characterized in that two roadways used for pressure relief are tunneled in top plates on two sides of an underground mining roadway to serve as pressure relief roadways, and the pressure relief roadways are located in an immediate roof in the vertical direction and located in solid coal on two sides of the mining roadway in the horizontal direction; the pressure relief roadway is used for reducing the stress level on the periphery of the mining roadway and transferring lateral bearing pressure into the solid coal; wherein the direct top refers to a rock stratum which is positioned above a coal seam and is in direct contact with the coal seam. Therefore, through the pressure relief roadways on the two sides of the mining roadway, the stress level on the periphery of the mining roadway is reduced, meanwhile, lateral bearing pressure can be transferred into solid coal, the influence of coal mine pressure on the mining roadway can be effectively controlled, and safe mining of a working face is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine pressure prevention and control, and particularly relates to a coal mine roadway pressure relief system. BACKGROUND

[0002] Coal mine roadway pressure is the fundamental cause of many mine accidents such as rock burst, roof disaster and coal and gas outburst, so reducing the mine pressure has great practical significance for coal mine safety and efficient mining.

[0003] At present, the coal mining roadway is affected by the superposition of the goaf of the previous working face and the mining area of the current working face, especially the pressure of the adjacent roadway is large, which may cause the deformation of the coal mining roadway, and even cause rock burst, roof collapse and other major accidents. In the related technology, the commonly used roadway pressure relief method is passive defense, which cannot fundamentally solve the problem of coal mining roadway pressure. SUMMARY

[0004] The present application aims to provide a coal mine roadway pressure relief system, which can reduce the stress level around the mining roadway through the pressure relief roadway on both sides of the mining roadway, and can transfer the lateral support pressure to the solid coal, so as to effectively control the influence of the coal pressure on the mining roadway and ensure the safe mining of the working face.

[0005] To achieve the above purpose, the present application provides a coal mine roadway pressure relief system, which is two pressure relief roadways excavated in the roof on both sides of the underground mining roadway, serving as pressure relief roadways, the pressure relief roadways are located in the immediate roof in the vertical direction and in the solid coal on both sides of the mining roadway in the horizontal direction; the pressure relief roadways are used to reduce the stress level around the mining roadway and transfer the lateral support pressure to the solid coal; wherein the immediate roof refers to the rock above the coal seam and in direct contact with the coal seam.

[0006] In addition, the coal mine roadway pressure relief system according to the present application can have the following additional technical features: In some embodiments, the width and height of the pressure relief roadway are half of the mining roadway, and the width of the pressure relief roadway is greater than the height.

[0007] In some embodiments, the distance between the pressure relief roadway and the mining roadway in the vertical direction is a first threshold value, and the distance between the pressure relief roadway and the mining roadway in the horizontal direction is a second threshold value, wherein the first threshold value is greater than the second threshold value.

[0008] In some embodiments, the pressure relief roadway needs to be excavated after the working face of the mining roadway is connected and before the mining of the working face, and the anchor rod support is performed.

[0009] In some embodiments, the coal mine roadway pressure relief system further comprises a monitoring module for monitoring the working face pressure and giving a pressure relief roadway warning based on the working face pressure.

[0010] In some embodiments, the pressure relief roadway is also used as a gas high extraction roadway and a drainage roadway.

[0011] The present application discloses a coal mine roadway pressure relief system, which comprises two pressure relief roadways excavated in the roof on both sides of a mining roadway underground, wherein the pressure relief roadways are located in the immediate roof in the vertical direction and in the solid coal on both sides of the mining roadway in the horizontal direction; the pressure relief roadways are used to reduce the stress level around the mining roadway and to transfer the lateral support pressure to the solid coal; wherein the immediate roof refers to the rock layer above the coal seam and directly in contact with the coal seam. Thus, through the pressure relief roadways on both sides of the mining roadway, the stress level around the mining roadway is reduced, and the lateral support pressure can be transferred to the solid coal, so that the influence of the coal mine pressure on the mining roadway can be effectively controlled, and the safe mining of the working face can be ensured.

[0012] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which: Figure 1 FIG. 1 is a structural diagram of a coal mine roadway pressure relief system provided by an embodiment of the present application; Figure 2 FIG. 2 is a diagram showing the influence of a pressure relief roadway on the vertical stress provided by the coal mine roadway pressure relief system of the present application; DETAILED DESCRIPTION

[0014] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0015] The coal mine roadway pressure relief system of the embodiments of the present application is described below with reference to the accompanying drawings.

[0016] Figure 1 FIG. 1 is a structural diagram of a coal mine roadway pressure relief system provided by an embodiment of the present application;

[0017] As shown in FIG. 1, the structural diagram of the coal mine roadway pressure relief system can be a pressure relief roadway position plan view (a plan view of the pressure relief roadway position) and a working face plan view (a plan view of the working face) as shown in FIG. 2. Figure 1 ​To illustrate, the coal mine roadway pressure relief system of the embodiments of the present application is to dig two roadways for pressure relief in the roof on both sides of the underground mining roadway, as pressure relief roadways, the pressure relief roadways are located in the immediate roof in the vertical direction and in the solid coal on both sides of the mining roadway in the horizontal direction; the pressure relief roadways are used to reduce the stress level around the mining roadway and to transfer the lateral support pressure to the solid coal; wherein the immediate roof refers to the rock layer above the coal seam and directly in contact with the coal seam.

[0018] It should be noted that the pressure relief roadway is to dig one pressure relief roadway on each side of each mining roadway, for pressure relief on both sides of the mining roadway.

[0019] In some embodiments, the width and height of the pressure relief roadway are half of the mining roadway, and the width of the pressure relief roadway is greater than the height.

[0020] In some embodiments, the distance of the pressure relief roadway from the mining roadway in the vertical direction is a first threshold value, and the distance of the pressure relief roadway from the mining roadway in the horizontal direction is a second threshold value, wherein the first threshold value is greater than the second threshold value.

[0021] As an example, the first threshold value can be set to 5-10m (not including 5), and the second threshold value can be set to 0-5m, for example, the distance of the pressure relief roadway from the mining roadway in the vertical direction is 6m, and the distance of the pressure relief roadway from the mining roadway in the horizontal direction is 3m.

[0022] In some embodiments, the pressure relief roadway needs to be excavated after the working face of the mining roadway is through and before the working face is mined, and is supported by anchor rods. This effectively prevents the pressure relief roadway from collapsing prematurely and failing to achieve pressure relief.

[0023] In some embodiments, since the severe damage of the pressure relief roadway is often a clear signal of increased working face pressure, monitoring and pressure relief need to be strengthened at this time. As an example, the coal mine roadway pressure relief system further includes a monitoring module (not shown in the figure), which is used to monitor the working face pressure and to give a pressure relief roadway warning based on the working face pressure. Thus, the intelligent warning of the pressure relief roadway is realized by monitoring the working face pressure, and the corresponding monitoring and pressure relief strategies are executed according to the warning level.

[0024] In some embodiments, the pressure relief roadway is also used as a gas high extraction roadway and a drainage roadway.

[0025] In addition, in order to realize the transfer and reduction of vertical stress, the embodiments of the present application provide a schematic diagram of the influence of the pressure relief roadway on vertical stress, as shown in Figure 2As shown, the pressure relief roadway: the roadway actively constructed, used to absorb or transfer the stress in the vertical direction; the mining roadway: the transportation or ventilation roadway used when the working face advances; the solid coal: the unmined coal body, bearing stress transmission. The goaf: the empty area after the coal is mined out, the roof may collapse; the vertical stress distribution curve: reflecting the size change of the stress in the vertical direction at different positions. Among them, when there is no pressure relief roadway, the stress in the vertical direction forms an obvious arch-shaped distribution at the junction of the solid coal and the goaf, and the stress peak value near the mining roadway is high. When there is a pressure relief roadway, the pressure relief roadway intercepts and absorbs part of the stress, so that the vertical stress area shifts to the deep part of the coal body, the vertical stress peak value decreases and the distribution is more gentle, and the stress level in the area where the mining roadway is located decreases significantly.

[0026] In summary, the excavation of the pressure relief roadway not only can reduce the stress level in the vertical direction, but also can change the distribution area of the stress in the vertical direction, effectively reduce the pressure around the roadway, reduce the maintenance cost of the mining roadway, and ensure the continuity and stability of production.

[0027] The coal mine roadway pressure relief system disclosed in the present application is two pressure relief roadways excavated in the roof on both sides of the underground mining roadway, the pressure relief roadways are vertically located in the immediate roof, and are horizontally located in the solid coal on both sides of the mining roadway; the pressure relief roadways are used to reduce the stress level around the mining roadway, and simultaneously shift the lateral support pressure to the solid coal; wherein the immediate roof refers to the rock layer above the coal seam and directly in contact with the coal seam. Thus, through the pressure relief roadways on both sides of the mining roadway, the stress level around the mining roadway is reduced, and the lateral support pressure can be simultaneously shifted to the solid coal, the influence of the coal mine pressure on the mining roadway can be effectively controlled, and the safe mining of the working face is ensured.

[0028] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

[0029] Any processes or methods described in the flowcharts or elsewhere herein can be understood as representing one or more modules, segments, or portions of code that include executable instructions for implementing specific logic functions (or steps) and / or can be implemented entirely or substantially in hardware, and that their respective computer- or processor-readable medium therefore includes aspects that are the same as or similar to any of the computer- or processor-readable media described herein. The embodiments of the present application, therefore, are not limited to any specific implementation techniques described herein, but rather can include any relevant technique or techniques.

[0030] It should be understood that aspects of the application can be implemented in hardware, software, firmware, or combinations thereof, and that the embodiments described herein can be implemented with or across any kind of computer system or other processing system. In the foregoing embodiments, various steps or methods can be implemented in software or firmware that is stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, and in another embodiment, any of the following techniques, which are well known in the art, can be used to implement the present application: a discrete logic circuit having logic gates for implementing logic functions upon data signals, an application specific integrated circuit having appropriate combinational logic gates, a programmable gate array (PGA), a field programmable gate array (FPGA), and / or the like.

[0031] It will be appreciated by those skilled in the art that the computer program that implements the steps of the above-described embodiments of the system can be stored in a computer-readable storage medium, which, when executed, includes one or more of the steps of the system embodiments.

[0032] In addition, each functional unit in the various embodiments of the present application can be integrated in one processing module, or each unit can be physically present separately, or two or more units can be integrated in one module. The above-mentioned integrated module can be realized in the form of hardware or in the form of a software functional module. When the integrated module is realized in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0033] The above-mentioned storage medium can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A coal mine roadway pressure relief system, characterised in that, The coal mine roadway pressure relief system comprises two pressure relief roadways dug in the roof on both sides of a mining roadway in a mine, which are used as pressure relief roadways and vertically located in the immediate roof and horizontally located in the solid coal on both sides of the mining roadway; the pressure relief roadways are used to reduce the stress level around the mining roadway and transfer the lateral support pressure to the solid coal; wherein the immediate roof refers to a rock layer above the coal seam and directly contacting the coal seam.

2. The coal mine roadway pressure relief system of claim 1, wherein, The width and height of the pressure relief roadway are half of the mining roadway, and the width of the pressure relief roadway is greater than the height.

3. The coal mine roadway pressure relief system of claim 1, wherein, The distance between the pressure relief roadway and the mining roadway in the vertical direction is a first threshold value, and the distance between the pressure relief roadway and the mining roadway in the horizontal direction is a second threshold value, wherein the first threshold value is greater than the second threshold value.

4. The coal mine roadway pressure relief system of claim 1, wherein, The pressure relief roadway needs to be excavated after the working face of the mining roadway is connected and before the working face is mined, and is supported by anchor rods.

5. The coal mine roadway pressure relief system of claim 4, wherein, The coal mine roadway pressure relief system further comprises a monitoring module for monitoring the working face pressure and giving a warning of the pressure relief roadway based on the working face pressure.

6. The coal mine roadway pressure relief system of claim 1, wherein, The pressure relief roadway is also used as a gas high extraction roadway and a drainage roadway.

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