Drilling and testing vibration signal acquisition system with positioning function

Abstract

The invention provides a drilling and measuring vibration signal acquisition system with a positioning function, which comprises a first vibration signal acquisition device, a distance sensor and a second vibration signal acquisition device, and is characterized in that the first vibration signal acquisition device and the second vibration signal acquisition device are fixed on a rock wall; the distance sensor is arranged between the two vibration signal collectors, the distance sensor is used for measuring the distance between the two vibration signal collectors, the drilling machine generates vibration when breaking rocks, and the drilling position coordinates of the drilling machine can be determined by monitoring vibration signals and the distance, measured by the distance sensor, between the two collectors in combination with the drilling construction technology. The system can perform real-time monitoring on the drilling depth while performing vibration signal acquisition, and is very suitable for roadway drilling and measurement.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction, and in particular to a vibration signal acquisition system for drilling and measurement with a positioning function. Background Art

[0002] In the process of coal mine roadway and tunnel construction, maintenance and scientific research, it is often necessary to detect the rock properties of the rock formations and understand the internal structural conditions of the rock formations in a timely manner, so as to provide important guidance for the smooth implementation of the construction plan and the subsequent technical optimization. At present, some technical solutions for rock property detection are to use the borehole peep method to detect the rock structure information of each rock formation. This detection method obtains the internal structural image of the surrounding rock for qualitative analysis, and cannot quantitatively evaluate the rock characteristics, making it difficult to meet the technical requirements of accuracy and efficiency. There are also some technical solutions that use the drilling method of drilling rigs to identify rock formations. Not only do they need to install rock formation signal monitoring sensors on the drilling rigs, but they also need to install displacement sensors to determine the depth of the borehole, and then calibrate the rock formation information at each depth. Due to the limited length of a single drill rod, multiple drill rods need to be continuously installed during deep hole detection, which further causes troubles in the measurement of borehole depth. Summary of the invention

[0003] The present invention aims to provide a vibration signal acquisition system for drilling measurement with a positioning function. The system can monitor the drilling depth in real time while acquiring vibration signals, and is very suitable for tunnel drilling measurement.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] In a first aspect, the present invention provides a vibration signal collection system with a positioning function for drilling measurement, comprising a first vibration signal collector, a distance sensor and a second vibration signal collector, the first vibration signal collector and the second vibration signal collector are fixed on a rock wall, the distance sensor is arranged between the first vibration signal collector and the second vibration signal collector, and the distance sensor is used to measure the distance between the first vibration signal collector and the second vibration signal collector.

[0006] Preferably, the vibration signal collector includes a fixing seat, a vibration sensor and a compression spring, the fixing seat is used to fix the vibration sensor to the rock wall, the vibration sensor is arranged inside the fixing seat, the vibration sensor is nested and connected to the fixing seat, the compression spring is arranged between the fixing seat and the vibration sensor, and the compression spring is used to press the vibration sensor into close contact with the rock wall so that the vibration sensor can better collect vibration signals from the rock wall.

[0007] Preferably, a magnetic seat is provided on the side of the fixing seat in contact with the rock wall, the magnetic seat is magnetically fixed to the tray, and the tray is fixedly arranged on the rock wall.

[0008] Preferably, an adjusting screw is provided at the upper end of the fixing seat, the adjusting screw is threadedly connected to the fixing seat, one end of the adjusting screw is in contact with a compression spring, and the adjusting screw is used to adjust the compression force between the vibration sensor and the rock wall.

[0009] In a second aspect, the present invention provides a vibration signal collection system with a positioning function for drilling measurement, comprising a first vibration signal collector, a distance sensor and a second vibration signal collector, the first vibration signal collector and the second vibration signal collector are fixed in a hole in a vertical rock wall, the distance sensor is arranged between the first vibration signal collector and the second vibration signal collector, and the distance sensor is used to measure the distance between the first vibration signal collector and the second vibration signal collector.

[0010] Preferably, the vibration signal collector includes a fixing seat and a vibration sensor. The fixing seat is used to fix the vibration sensor to the hole wall of the rock formation. The fixing seat is in close contact with the hole wall of the rock formation. The vibration sensor is installed on the fixing seat. The vibration signal generated by the drill bit of the drilling rig when breaking the rock is transmitted to the vibration sensor through the fixing seat.

[0011] Preferably, a support plate is provided on the outer periphery of the fixing seat, and a support spring is fixedly provided between the support plate and the fixing seat, and the support spring is used to elastically squeeze the support plate onto the hole wall so that the support plate is fixed to the hole wall, thereby achieving fixation of the vibration signal collector.

[0012] Preferably, a plurality of the support plates are symmetrically arranged around the central axis of the vibration signal collector; the support plate is arc-shaped, and the outer diameter of the support plate is equivalent to the diameter of the drill hole.

[0013] Preferably, the upper and lower end surfaces of the support plate are provided with guide angles.

[0014] Preferably, the support springs are symmetrically arranged in multiple groups around the central axis of the vibration signal collector, and each group of the support springs consists of two symmetrically arranged arc-shaped leaf springs.

[0015] The beneficial effects produced by the present invention are:

[0016] 1. Provide a vibration signal acquisition system with positioning function for drilling and measurement. The system collects vibration signals in an indirect way. The vibration sensor is arranged separately from the drilling and measurement mechanism. It does not require much modification to the existing drilling rig to turn it into a drilling and measurement mechanism with rock formation identification function.

[0017] 2. The system can monitor the drilling position and depth in real time while collecting vibration signals, and has the function of locating the drilling position. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the overall layout of the vibration signal acquisition system provided in Example 1;

[0019] Figure 2 is a schematic structural diagram of the vibration signal collector part in the first embodiment;

[0020] Figure 3 It is a schematic diagram of the overall layout of the vibration signal acquisition system provided in Example 2;

[0021] Figure 4 is a schematic diagram of the structure of the vibration signal collector part in the second embodiment;

[0022] Figure 5 is a top view of the vibration signal collector in the second embodiment;

[0023] Wherein: 1. first vibration signal collector; 101. fixing seat; 101a. magnetic seat; 101b. support plate; 101c. support spring; 11b. guide angle; 102. vibration sensor; 103. compression spring; 104. adjustment screw; 2. distance sensor; 3. second vibration signal collector; 4. drilling rig. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] Embodiment 1

[0026] like Figure 1As shown, this embodiment discloses a vibration signal collection system with positioning function for drilling measurement, including a first vibration signal collector 1, a distance sensor 2 and a second vibration signal collector 3, the first vibration signal collector 1 and the second vibration signal collector 3 are fixed on the rock wall, the distance sensor 2 is arranged between the first vibration signal collector 1 and the second vibration signal collector 3, the distance sensor 2 is used to measure the distance between the first vibration signal collector 1 and the second vibration signal collector 3, the drilling rig 4 performs drilling operation on the rock formation, and the drill bit of the drilling rig 4 generates vibration when breaking the rock. By monitoring the vibration signal and the distance between the two collectors measured by the distance sensor 2, combined with the drilling construction process, the drilling position coordinates of the drilling rig 4 can be determined, and the signal processor can determine the rock formation information at the corresponding position by analyzing the vibration signal collected by the first vibration signal collector 1 and the second vibration signal collector 3. There are many schemes for determining the depth of the drilling point. For example, the time difference between the vibration signal reaching the vibration sensor 102 and the position relationship of the vibration sensor 102 can be used to perform corresponding calculations. The specific method of determining the depth of the drilling point will be different due to the different anchor drilling construction processes and the different installation methods of the vibration sensor 102. However, these are all existing positioning technologies and will not be described in detail here. Based on the present invention, the different methods for determining the depth of the drilling point are not used to limit the protection scope of the present invention.

[0027] like Figure 2 As shown, the vibration signal collector includes a fixing seat 101, a vibration sensor 102 and a compression spring 103. The fixing seat 101 is used to fix the vibration sensor 102 to the rock wall. The vibration sensor 102 is arranged inside the fixing seat 101. The vibration sensor 102 is nested and connected with the fixing seat 101. The compression spring 103 is arranged between the fixing seat 101 and the vibration sensor 102. The compression spring 103 is used to press the vibration sensor 102 to be in close contact with the rock wall, so that the vibration sensor 102 can better collect vibration signals from the rock wall. A magnetic seat 101a is provided on the side of the fixing seat 101 that contacts the rock wall. The magnetic seat 101a is magnetically fixed to the tray, and the tray is fixed on the rock wall. The magnetic seat 101a allows the fixing seat 101 to be fixedly connected to the tray very conveniently, thereby realizing the rapid installation of the vibration signal collector. An adjusting screw 104 is provided at the upper end of the fixing seat 101 . The adjusting screw 104 is threadedly connected to the fixing seat 101 . One end of the adjusting screw 104 contacts the compression spring 103 . The adjusting screw 104 is used to adjust the compression force between the vibration sensor 102 and the rock wall.

[0028] Embodiment 2

[0029] like Figure 3 As shown, combined Figure 1This embodiment discloses a vibration signal acquisition system with a positioning function for drilling measurement. Compared with the vibration signal acquisition system provided in the first embodiment, the installation method and the structure of the fixing base 101 of this embodiment are different.

[0030] In this embodiment, the first vibration signal collector 1 and the second vibration signal collector 3 are fixed in a hole in a vertical rock wall, and the distance sensor 2 is arranged between the first vibration signal collector 1 and the second vibration signal collector 3. The distance sensor 2 is used to measure the distance between the first vibration signal collector 1 and the second vibration signal collector 3. The drilling rig 4 performs drilling operations on the rock formation, and the drill bit of the drilling rig 4 generates vibrations when breaking the rock. By monitoring the vibration signal and the distance between the two collectors measured by the distance sensor 2, combined with the drilling construction process, the drilling position coordinates of the drilling rig 4 can be determined, and the signal processor can determine the rock formation information at the corresponding position by analyzing the vibration signals collected by the first vibration signal collector 1 and the second vibration signal collector 3.

[0031] like Figure 4 , Figure 5 As shown, the vibration signal collector includes a fixing seat 101 and a vibration sensor 102. The fixing seat 101 is used to fix the vibration sensor 102 to the hole wall of the rock formation. The fixing seat 101 is in close contact with the hole wall of the rock formation. The vibration sensor 102 is fixedly mounted on the fixing seat 101. The vibration signal generated by the drill bit of the drilling rig 4 when breaking the rock is transmitted to the vibration sensor 102 through the fixing seat 101. A support plate 101b is provided on the periphery of the fixing seat 101. A support spring 101c is fixedly provided between the support plate 101b and the fixing seat. The support spring 101c is used to squeeze and fix the support plate 101b to the hole wall, so that the support plate 101b is fixed to the hole wall, thereby realizing the fixation of the vibration signal collector. A plurality of support plates 101b are symmetrically arranged around the central axis of the vibration signal collector. The support plates 101b are arc-shaped, and the outer diameter of the support plates 101b is equivalent to the borehole diameter. The upper and lower end surfaces of the support plate 101b are provided with guide angles 11b. When disassembling the vibration signal collector, the guide angle 11b can prevent the support plate 101b from getting stuck with the hole wall. Multiple groups of support springs 101c are symmetrically arranged around the central axis of the vibration signal collector, and each group of support springs 101c consists of two symmetrically arranged arc leaf springs.

[0032] Embodiment 3

[0033] According to the layout characteristics of the above embodiments, the solution of embodiment 1 is more accurate in locating the plane coordinates of the drilling points, and the solution of embodiment 2 is more accurate in locating the depth coordinates of the drilling points. In this embodiment, the solution of embodiment 1 and the solution of embodiment 2 are combined and used, and through multi-channel monitoring, they can verify each other, making the monitoring results more accurate.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drilling vibration signal acquisition system with positioning function, characterized in that: include: A first vibration signal collector (1), a distance sensor (2) and a second vibration signal collector (3), wherein the first vibration signal collector (1) and the second vibration signal collector (3) are fixed on a rock wall, the distance sensor (2) is arranged between the first vibration signal collector (1) and the second vibration signal collector (3), and the distance sensor (2) is used to measure the distance between the first vibration signal collector (1) and the second vibration signal collector (3).

2. A drilling measurement vibration signal acquisition system with positioning function according to claim 1, characterized in that: The vibration signal collector comprises a fixing seat (101), a vibration sensor (102) and a pressing spring (103); the fixing seat (101) is used to fix the vibration sensor (102) to a rock wall; the vibration sensor (102) is arranged inside the fixing seat (101); the vibration sensor (102) and the fixing seat (101) are nested and connected; the pressing spring (103) is arranged between the fixing seat (101) and the vibration sensor (102); the pressing spring (103) is used to press the vibration sensor (102) until it is in close contact with the rock wall.

3. A drilling measurement vibration signal acquisition system with positioning function according to claim 2, characterized in that: A magnetic seat (101a) is provided on the side of the fixing seat (101) that contacts the rock wall. The magnetic seat (101a) is fixed to the tray by magnetic attraction. The tray is fixedly arranged on the rock wall.

4. The drilling measurement vibration signal acquisition system with positioning function according to claim 2, characterized in that: An adjusting screw (104) is provided at the upper end of the fixing seat (101), the adjusting screw (104) is threadedly connected to the fixing seat (101), one end of the adjusting screw (104) is in contact with a compression spring (103), and the adjusting screw (104) is used to adjust the compression force between the vibration sensor (102) and the rock wall.

5. A vibration signal acquisition system for drilling with positioning function, characterized in that: include: A first vibration signal collector (1), a distance sensor (2) and a second vibration signal collector (3), wherein the first vibration signal collector (1) and the second vibration signal collector (3) are fixed in a hole in a vertical rock wall, the distance sensor (2) is arranged between the first vibration signal collector (1) and the second vibration signal collector (3), and the distance sensor (2) is used to measure the distance between the first vibration signal collector (1) and the second vibration signal collector (3).

6. The drilling vibration signal acquisition system with positioning function according to claim 5, characterized in that: The vibration signal collector comprises a fixing seat (101) and a vibration sensor (102); the fixing seat (101) is used to fix the vibration sensor (102) to the hole wall of the rock formation; the fixing seat (101) is in close contact with the hole wall of the rock formation; and the vibration sensor (102) is fixedly mounted on the fixing seat (101).

7. The drilling measurement vibration signal acquisition system with positioning function according to claim 6, characterized in that: A support plate (101b) is provided on the outer periphery of the fixing seat (101), and a support spring (101c) is fixedly provided between the support plate (101b) and the fixing seat, and the support spring (101c) is used to squeeze and fix the support plate (101b) onto the hole wall.

8. The drilling measurement vibration signal acquisition system with positioning function according to claim 7, characterized in that: A plurality of support plates (101b) are symmetrically arranged around the central axis of the vibration signal collector; the support plates (101b) are arc-shaped, and the outer diameter of the support plates (101b) is equivalent to the diameter of the drilled hole.

9. The drilling measurement vibration signal acquisition system with positioning function according to claim 7, characterized in that: The upper and lower end surfaces of the support plate (101b) are provided with guide angles (11b).

10. The drilling measurement vibration signal acquisition system with positioning function according to claim 7, characterized in that: The support springs (101c) are symmetrically arranged in multiple groups around the central axis of the vibration signal collector, and each group of the support springs (101c) consists of two symmetrically arranged arc-shaped leaf springs.

Images