Coal mine tunnel deformation monitoring method

Abstract

The invention discloses a coal mine tunnel deformation monitoring method, which comprises the following steps that: three laser range finders and one mining intrinsic safety type surrounding rock separation monitor are arranged along the length of a tunnel at intervals of 50m, one laser range finder and one mining intrinsic safety type surrounding rock separation monitor are fixedly and vertically arranged on a tunnel top plate, and the other laser range finder and the other mining intrinsic safety type surrounding rock separation monitor are fixedly and vertically arranged on the tunnel top plate; the two laser range finders are respectively, correspondingly and horizontally installed at the maximum width positions of the roadway on the two sides of the roadway, the positioning plate is vertically installed between the two laser range finders, the convergence amount of the top plate, the bottom plate and the two sides of the roadway is monitored, data are transmitted into a ground database through an underground looped network, all the monitored data are stored, analysis and summarization are provided in real time, and the safety of the roadway is guaranteed. And a powerful basis is provided for the safety of roadway deformation.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal mine mining, and particularly relates to a method for monitoring the deformation amount of coal mine roadways. Background Art

[0002] The observation of the roadway deformation amount is the main content of roof management. For a long time, in the transportation roadway (bolted with wire mesh and cable), a set of mechanical separation meters are installed every 50m in the mine, and in the return airway (timbered roadway), the "cross-point" observation method is adopted. This not only consumes a large amount of manpower, but also cannot obtain relatively accurate monitoring data due to the use of rough equipment such as tape measures. As a result, there is no reliable basis for the design of roadway support parameters. During design, empirical formulas are often used, leading to insufficient or excessive support strength, causing serious economic losses. Moreover, there is a lack of substantial monitoring of the approaching amount of the two sides in the transportation roadway, resulting in loopholes in roof management and greatly reducing the safety of roadway management. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for monitoring the deformation amount of coal mine roadways, which comprehensively monitors the entire cross-section of the roadway, obtains reliable data, and provides a strong basis for the safety of roadway deformation.

[0004] The technical solution adopted by the present invention is a method for monitoring the deformation amount of coal mine roadways. The method is to install 3 laser rangefinders and 1 intrinsically safe mine rock separation monitor along the length of the roadway every 50m. One of the laser rangefinders and the intrinsically safe mine rock separation monitor are fixedly installed vertically on the roof of the roadway, and the two laser rangefinders are respectively horizontally installed on the two sides of the roadway at the maximum width of the roadway. A positioning plate is installed vertically between the two laser rangefinders to detect the approaching amount of the roof and floor and the two sides of the roadway, and the data is transmitted into the ground database through the underground ring network.

[0005] Further, the monitoring of the roadway deformation amount includes the change amount of the roadway width, the change amount of the roadway height, the floor heave amount, the approaching amount of the left side, and the approaching amount of the right side.

[0006] Further, the calculation of the change amount of the roadway width: ΔB = B - (a + b + d + B z + B y );

[0007] B is the maximum width of the roadway, a is the distance measured by the laser rangefinder horizontally installed on the left side, b is the distance measured by the laser rangefinder horizontally installed on the right side, d is the width of the positioning plate, B Z is the distance from the left end to the right end of the laser rangefinder horizontally installed on the left side, B y is the distance from the left end to the right end of the laser rangefinder horizontally installed on the right side.

[0008] Further, the approaching amount of the left side: Δ 左= a0 - a1; a0 and a1 are the readings of a during installation and the current reading of a respectively.

[0009] Furthermore, the amount of right rib approaching: Δ 右 = b0 - b1; b0 and b1 are the readings of b during installation and the current reading of b respectively.

[0010] Furthermore, the calculation of the change in roadway height:

[0011] h is the maximum height of the roadway, c is the distance measured by the laser rangefinder installed on the roof of the roadway for the roadway height, is the distance from the top to the bottom of the laser rangefinder installed on the roof of the roadway.

[0012] Furthermore, the calculation of the amount of floor heave of the roadway: Δ 底 = Δh - (l s + l q ); l s and l q are the readings of the deep and shallow base points of the surrounding rock separation instrument respectively.

[0013] Compared with the prior art, the beneficial effect of the present invention is that every 50m, 3 mine intrinsically safe laser rangefinders and 1 mine intrinsically safe surrounding rock separation monitor are used to observe the roof-to-floor and rib approaching amounts of the roadway in real time. The data is transmitted into the ground database through the underground ring network, and all the monitored data will be saved, providing real-time analysis and summary, providing a strong basis for the safety of roadway deformation, reducing manual input, reducing reading errors, making the monitored data more continuous, the analysis results more reliable, and improving the safety of roadway management. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the installation of the roadway deformation monitoring equipment. DETAILED DESCRIPTION OF THE INVENTION

[0015] The following will further explain the present invention in conjunction with the drawings of the specification, so as to be better understood by those skilled in the art.

[0016] Example 1

[0017] A method for monitoring the deformation amount of a coal mine roadway, which is to install 3 laser rangefinders and 1 mine intrinsically safe surrounding rock separation monitor along the length of the roadway every 50m. One of the laser rangefinders and the mine intrinsically safe surrounding rock separation monitor are fixedly installed vertically on the roof of the roadway, and the two laser rangefinders are respectively horizontally installed at the maximum width of the roadway on the two ribs of the roadway. A positioning plate is installed vertically between the two laser rangefinders to monitor the change in roadway width, the change in roadway height, the amount of floor heave, the amount of left rib approaching and the amount of right rib approaching in real time; among them:

[0018] Calculation of roadway width variation: ΔB = B - (a + b + d + B z + B y );

[0019] B is the maximum width of the roadway, a is the measured distance of the laser rangefinder horizontally installed on the left side, b is the measured distance of the rangefinder horizontally installed on the right side, d is the width of the positioning plate, B Z is the distance from the left end to the right end of the laser rangefinder horizontally installed on the left side, B y is the distance from the left end to the right end of the laser rangefinder horizontally installed on the right side.

[0020] Left rib approaching amount: Δ 左 = a0 - a1; a0 and a1 are the readings of a at the time of installation and the current reading of a respectively.

[0021] Right rib approaching amount: Δ 右 = b0 - b1; b0 and b1 are the readings of b at the time of installation and the current reading of b respectively.

[0022] Calculation of roadway height variation:

[0023] h is the maximum height of the roadway, c is the measured distance of the laser rangefinder installed on the roadway roof for the roadway height, is the distance from the top end to the bottom end of the laser rangefinder installed on the roadway roof.

[0024] Calculation of roadway floor heave amount: Δ 底 = Δh - (l s + l q ); l s and l q are the readings of the deep and shallow base points of the surrounding rock separation meter respectively.

[0025] Data is transmitted into the ground database through the underground ring network, which will save all the monitored data, provide real-time analysis and summary, provide a strong basis for the safety of roadway deformation, and the monitored data is more continuous, the analysis results are more reliable, improving the safety of roadway management.

[0026] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the spirit and principles of the present invention design, various deformations and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for monitoring the deformation amount of a coal mine roadway, characterized in that, The method is to install 3 laser rangefinders and 1 intrinsically safe mine surrounding rock separation monitoring instrument along the length of the roadway at intervals of 50 m. One of the laser rangefinders and the intrinsically safe mine surrounding rock separation monitoring instrument are fixedly installed vertically on the roof of the roadway. Two laser rangefinders are respectively installed horizontally on the two sides of the roadway at the maximum width of the roadway. A positioning plate is installed vertically between the two laser rangefinders to detect the roof-to-floor and rib convergence of the roadway. The data is transmitted into the ground database through the underground ring network.

2. The deformation amount monitoring method for a coal mine roadway according to claim 1, wherein, The monitoring of the roadway deformation includes the change in roadway width, the change in roadway height, the floor heave of the roadway, the rib convergence of the left side, and the rib convergence of the right side.

3. A method for monitoring the deformation amount of a coal mine roadway according to claim 2, characterized in that Calculation of the change in roadway width: ΔB = B - (a + b + d + B z + B y ); B is the maximum width of the roadway, a is the distance measured by the laser rangefinder horizontally installed on the left side, b is the distance measured by the rangefinder horizontally installed on the right side, d is the width of the positioning plate, B Z is the distance from the left end to the right end of the laser rangefinder horizontally installed on the left side, B y is the distance from the left end to the right end of the laser rangefinder horizontally installed on the right side.

4. A method for monitoring the deformation amount of a coal mine roadway according to claim 2, characterized in that, Left side shift amount: Δ 左 = a0 - a1; a0 and a1 are the readings of a during installation and at this moment respectively.

5. A method for monitoring the deformation amount of a coal mine roadway according to claim 2, characterized in that, Right side shift amount: Δ 右 = b0 - b1; b0 and b1 are the readings of b during installation and at this moment respectively.

6. The method for monitoring the deformation amount of a coal mine roadway according to claim 2, characterized in that, Calculation of the change in roadway height: h is the maximum height of the roadway, and c is the distance measured by the laser rangefinder installed on the roof of the roadway for the height of the roadway. It is the distance from the top to the bottom of the laser rangefinder installed on the roof of the roadway.

7. A method for monitoring the deformation amount of a coal mine roadway according to claim 6, characterized in that, Amount of floor heave of roadway: Δ 底 = Δh - (l s + l q ); l s and l q are the readings of the deep and shallow base points of the surrounding rock separation meter respectively.

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