A multi-factor mine roadway roof rock stratum steady-state monitoring alarm device

Abstract

The present invention discloses a multi-factor mine tunnel roof rock stratum steady-state monitoring and alarm device, which belongs to the field of mine equipment technology. The multi-factor mine tunnel roof rock stratum steady-state monitoring and alarm device uses a uniform magnetic field generated by a magnetic field generator to make the interior of the first space be affected by the Lorentz force, thereby causing the charged particles to deflect 90 degrees and then just pass through the second small hole to enter the second space. When the unstable rock stratum sinks, the first connecting rod drives the negative electrode plate to vertically displace, causing the negative electrode plate to be impacted by the charged particles and change its position. Then, after detection by the display, an alarm is issued through the alarm. This method is mainly aimed at monitoring and alarming the steady state of the roof rock stratum, and monitors the settlement rate of the roof rock stratum, greatly improving the efficiency of the steady-state monitoring of the tunnel roof rock stratum, reducing the physical errors and potential dangers of manual monitoring, and ensuring the accuracy of monitoring.

Description

Technical Field

[0001] The invention belongs to the technical field of mine equipment, and in particular relates to a multi-factor mine roadway roof rock stratum steady-state monitoring and alarm device. Background Art

[0002] During underground coal mining, monitoring the settlement displacement and settlement rate of the tunnel roof is one of the important contents of mine pressure observation. In the past, monitoring was often carried out by arranging tunnel roof displacement meters. The specific measurement method is: several holes of different depths are drilled in the rock layer of the underground tunnel roof of the coal mine, and an anchor claw connected to a thin steel wire rope is extended into the roof rock layer along the drill hole. The other end of the steel wire rope is connected to a tensioned tape measure. When the anchor claw sinks with the rock layer, the steel wire rope connected to the anchor claw will also move accordingly, and the tensioned tape measure at the other end will shrink. At this time, the displacement of the rock layer can be seen from the tape measure scale. The main defects of this method are as follows: ① The tape measure needs to be placed on the tunnel roof, and manual readings are required for each monitoring, which poses a potential danger; ② When the spring in the tape measure is in a tensioned state for a long time, it is easy to produce material fatigue and fail; ③ It can only monitor the sinking displacement of the roof, but not the sinking rate of the roof. In actual production, monitoring the settlement rate of the roof is an important factor in judging the pressure of the roof; ④ The operation is complicated, tedious, time-consuming and labor-intensive, and the actual measurement effect in the mine is not good, and the measurement accuracy is insufficient. Currently, there is a patent for a tunnel side displacement measurement device and method with the publication number: CN201911116685.5, which clearly states that the benefits achieved are "measuring the creep displacement of the tunnel side according to the motion law of charged particles in a uniform electric field and a uniform magnetic field, which can greatly improve the accuracy of the measurement results of the creep displacement of the tunnel side, and at the same time improve the convenience and efficiency of the measurement. Moreover, while measuring the creep displacement of the tunnel side, it can ensure normal production underground without affecting pedestrians and traffic, ensuring the normal progress of production operations." However, this type of method is aimed at detecting the creep displacement of the tunnel side, and cannot realize the steady-state monitoring of the top rock formation and realize alarm. Therefore, a device that can realize the steady-state monitoring of the top rock formation is needed to replace the traditional detection method. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multi-factor mine tunnel roof rock stratum steady-state monitoring alarm device, which solves the problems that the traditional monitoring method has high manual observation intensity and potential dangers, and the traditional measuring device is prone to failure, resulting in inaccurate side pull collars. At the same time, the traditional method of intelligently monitoring the displacement of the roof sinking cannot effectively monitor and record the sinking rate.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a multi-factor mine tunnel roof rock stratum steady-state monitoring alarm device, comprising a first shell (21), the right side of the first shell (21) is fixedly connected to the left side of the second shell (22), the upper and lower surfaces of the inner wall of the first shell (21) are respectively an upper boundary plate (3) and a lower boundary plate (4), two magnetic field generators (5) are fixedly connected to the opposite surfaces of the upper boundary plate (3) and the lower boundary plate (4), the upper surface of the inner wall of the upper boundary plate (3) is provided with a first small hole (15), an emission source (1) is arranged above the first small hole (15), a positive electrode plate (6) and a negative electrode plate (7) are respectively slidably connected in two sliding holes provided on the upper surface of the second shell (22), the positive electrode plate (6) and the left side of the second shell (22) are both provided with a second small hole (16), and a second connecting rod (12) and a first connecting rod (9) are respectively arranged above the positive electrode plate (6) and the negative electrode plate (7);

[0007] The top end of the first connecting rod (9) is clamped to the inner wall of a first borehole (18) opened on the inner wall of an unstable rock formation through a first anchor claw (10), and the top end of the second connecting rod (12) is clamped to the inner wall of a second borehole (19) opened on the inner wall of a stable rock formation through a second anchor claw (13);

[0008] A power source (17) is provided on the left side of the positive electrode plate (6), and a display screen (14) and an alarm (20) are electrically connected to the surface of the negative electrode plate (7);

[0009] The inner walls of the first shell (21) and the second shell (22) are respectively provided with a first space and a second space;

[0010] The uniform magnetic field generated by the magnetic field generator (5) causes the interior of the first space to be affected by the Lorentz force, thereby causing the charged particles (2) emitted by the emission source to be deflected by 90 degrees, so that they can just pass through the second small hole (16) and enter the second space. Under the action of the uniform electric field generated by the positive electrode plate (6) and the negative electrode plate (7), they are subjected to the horizontal rightward electric field force and vertically collide with the negative electrode plate (7). Then, the display screen (14) outside the negative electrode plate (7) displays the impact position of the charged particles (2) received by the negative electrode plate (7). When the unstable rock layer sinks, the first connecting rod (9) drives the negative electrode plate (7) to vertically displace, and the position of the negative electrode plate (7) impacted by the charged particles (2) changes, and then an alarm is issued through the alarm after detection by the display.

[0011] As a further solution of the present invention: the bottom end of the first connecting rod (9) is fixedly connected to the first fixed end (8) on the upper surface of the negative electrode plate (7), and the bottom end of the second connecting rod (12) is fixedly connected to the second fixed end (11) provided on the upper surface of the positive electrode plate (6).

[0012] (3) Beneficial effects

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The multi-factor mining tunnel roof rock stratum steady-state monitoring and alarm device uses the uniform magnetic field generated by the magnetic field generator to affect the Lorentz force inside the first space, so that when the charged particles are deflected 90°, they can just pass through the second small hole to enter the second space, so that under the action of the uniform electric field generated by the positive electrode plate and the negative electrode plate, they are subjected to a horizontal electric field force to the right, causing them to collide vertically with the negative electrode plate, and then the display screen outside the negative electrode plate displays the impact position of the negative electrode plate receiving the charged particles. When the unstable rock stratum sinks, its first connecting rod drives the negative electrode plate to vertically displace, causing the negative electrode plate to change the position where it is impacted by the charged particles, and then an alarm is issued through the alarm after detection by the display. This method is mainly aimed at monitoring and alarming the steady state of the roof rock stratum, and monitors the settlement rate of the roof rock stratum, greatly improving the efficiency of steady-state monitoring of the tunnel roof rock stratum, reducing the physical errors and potential dangers of manual monitoring, and ensuring the accuracy of monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the present invention;

[0017] Figure 3 This is a diagram showing the monitoring principle of the present invention;

[0018] In the figure: 1. emission source; 2. charged particles; 3. upper boundary plate; 4. lower boundary plate; 5. magnetic field generator; 6. positive electrode plate; 7. negative electrode plate; 8. first fixed end; 9. first connecting rod; 10. first anchor claw; 11. second fixed end; 12. second connecting rod; 13. second anchor claw; 14. display screen; 15. first small hole; 16. second small hole; 17. power supply; 18. first drill hole; 19. second drill hole; 20. alarm; 21. first shell; 22. second shell. DETAILED DESCRIPTION

[0019] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0020] like Figure 1-3As shown, the present invention provides a technical solution: a multi-factor mine tunnel roof rock stratum steady-state monitoring alarm device, comprising a first shell 21, the right side of the first shell 21 is fixedly connected to the left side of the second shell 22, the upper and lower surfaces of the inner wall of the first shell 21 are respectively an upper boundary plate 3 and a lower boundary plate 4, two magnetic field generators 5 are fixedly connected to the opposite surfaces of the upper boundary plate 3 and the lower boundary plate 4, a first small hole 15 is opened on the upper surface of the inner wall of the upper boundary plate 3, and an emission source 1 is arranged above the first small hole 15, a positive electrode plate 6 and a negative electrode plate 7 are respectively slidably connected in the two sliding holes opened on the upper surface of the second shell 22, a second small hole 16 is opened on the positive electrode plate 6 and the left side of the second shell 22, and a first connecting rod 9 and a second connecting rod 12 are respectively arranged above the positive electrode plate 6 and the negative electrode plate 7.

[0021] The top end of the first connecting rod 9 is engaged with the inner wall of a first borehole 18 opened in the inner wall of the unstable rock formation via a first anchor claw 10. The top end of the second connecting rod 12 is engaged with the inner wall of a second borehole 19 opened in the inner wall of the stable rock formation via a second anchor claw 13. The use of the first anchor claw 10 and the second anchor claw 13 facilitates the maintenance of the first connecting rod 9 and the second connecting rod 12 within their respective rock formations, thereby facilitating real-time monitoring.

[0022] The bottom end of the first connecting rod 9 is fixedly connected to the first fixed end 8 on the upper surface of the negative electrode plate 7, and the bottom end of the second connecting rod 12 is fixedly connected to the second fixed end 11 provided on the upper surface of the positive electrode plate 6. By providing the first fixed end 8, the first fixed end 8 and the second fixed end 11 can maintain accurate installation positions with the first connecting rod 9 and the second connecting rod 12, making them more standardized.

[0023] The left side of the positive electrode plate 6 is provided with a power supply 17, and the surface of the negative electrode plate 7 is electrically connected with a display screen 14 and an alarm 20. By providing the display screen 14, the display screen 14 can facilitate its overall viewing and can maintain a good monitoring effect.

[0024] The inner walls of the first shell 21 and the second shell 22 are respectively provided with a first space and a second space.

[0025] The working principle of the present invention is:

[0026] The emission source 1 continuously emits charged particles 2, which are positively charged with a charge quantity q. The charged particles 2 pass through the first small hole 15 in the middle of the upper boundary plate 3. The first shell 21 and the second shell 22 are respectively the first space and the second space. The first space is wrapped by the first shell 21, which protects the internal structure. Since there are magnetic field generators 5 in front and behind the first space, a uniform magnetic field is formed in the first space. The uniform magnetic field has a magnitude of B. When the charged particle 2 enters the first space through the first small hole 15, it will be affected by the Lorentz force due to the uniform magnetic field in the first space, causing the charged particle 2 to perform uniform circular motion in the magnetic field, that is:

[0027] f 洛 =Bv1q=mv1 2 / R;

[0028] Where: f 洛 is the Lorentz force on the charged particle 2 in the uniform magnetic field;

[0029] B is the strength of the uniform magnetic field;

[0030] v1 is the initial velocity of the charged particle 2 entering the first space;

[0031] q is the charge of charged particle 2;

[0032] m is the mass of the charged particle2;

[0033] R is the radius of the circle in which the charged particle 2 moves in uniform circular motion.

[0034] The lower boundary of the first space is the lower boundary plate 4. When the charged particle 2 is deflected, it enters the second space through the second small hole 16 in the middle of the positive electrode plate 6 on its right side. The left boundary of the second space is the positive electrode plate 6, and the right boundary is the negative electrode plate 7. The surface of the positive electrode plate 6 and the negative electrode plate 7 is wrapped with a second shell 22. The second shell 22 plays a role in protecting the internal structure. The positive electrode plate 6 and the negative electrode plate 7 are parallel to each other, and the distance between the two is d. The positive electrode plate 6 is connected to the power supply 17. There is a uniform electric field between the positive electrode plate 6 and the negative electrode plate 7. The field strength of the uniform electric field is E. When the charged particle 2 in the first space enters the second space through the second small hole 16 in the middle of the positive electrode plate 6, since the charged particle 2 is positively charged, it will be subjected to a horizontal rightward electric field force in the second space.

[0035] f 电 =Eq;

[0036] Where: f 电 is the electric force exerted on the charged particle 2 in the electric field;

[0037] This causes the charged particle 2 to vertically hit the negative electrode plate 7 at a speed v2, where v2 is the speed at which the charged particle 2 hits the negative electrode plate 7, and its calculation method is:

[0038]

[0039] The negative electrode plate 7 is connected to a display screen 14. The negative electrode plate 7 can continuously receive the charged particles 2 and record the position of the receiving point of the charged particles 2. The display screen 14 can display the position d of the charged particles 2 received by the negative electrode plate 7. i The position of the first charged particle 2 on the negative electrode plate 7 is d1, the position of the second charged particle 2 on the negative electrode plate 7 is d2... The position of the i-th charged particle 2 on the negative electrode plate 7 is d i ...the position of the nth charged particle 2 on the negative electrode plate 7 is d n , where i = 1, 2, 3...n, and by calculating the distance d between the two charged particles 2 on the negative electrode plate 7 ji d j1 The distance between the position d1 where the first charged particle 2 is located on the negative electrode plate 7 and the position d2 where the second charged particle 2 is located on the negative electrode plate 7 is d j1 =d1-d2; d j2 The distance between the position d2 where the second charged particle 2 is located on the negative electrode plate 7 and the position d3 where the third charged particle 2 is located on the negative electrode plate 7 is d j2 =d2-d3......d ji The position d left by the i-th charged particle 2 on the negative electrode plate 7 i The position d left by the i+1th charged particle 2 on the negative electrode plate 7 i+1 The distance between them, d ji =d i -d i+1 ,......d jn The position d left by the nth charged particle 2 on the negative electrode plate 7 n The position d left by the n+1th charged particle 2 on the negative electrode plate 7 n+1 The distance between them, d jn =d n -d n+1 , where i = 1, 2, 3...n, and simultaneously record the display time t of the position where the two charged particles 2 are located on the negative electrode plate 7 i , t1 is the display time of the first charged particle 2 at the position left by the negative electrode plate 7, t2 is the display time of the second charged particle 2 at the position left by the negative electrode plate 7...t i The time t that the i-th charged particle 2 stays at the position of the negative electrode plate 7 is displayed.n is the display time of the position left by the nth charged particle 2 on the negative electrode plate 7, where i = 1, 2, 3...n, and the sedimentation rate v of the unstable rock formation is calculated based on this i , v1 is the velocity from the position where the first charged particle 2 is on the negative electrode plate 7 to the position where the second charged particle 2 is on the negative electrode plate 7, that is, v1 = d j1 / t2-t1=d1-d2 / t2-t1; v2 is the velocity from the position where the second charged particle 2 is located on the negative electrode plate 7 to the position where the third charged particle 2 is located on the negative electrode plate 7, that is:

[0040] v1...v2=d j2 / t3-t2=d2-d3 / t3-t2...v3...v i ;

[0041] where v i is the velocity from the position where the i-th charged particle 2 is on the negative electrode plate 7 to the position where the i+1-th charged particle 2 is on the negative electrode plate 7, that is:

[0042] v i =d ji / t i+1 -t i =d i -d i+1 / t i+1 -t i ......v n ;

[0043] where v n is the velocity from the position where the nth charged particle 2 is on the negative electrode plate 7 to the position where the n+1th charged particle 2 is on the negative electrode plate 7, that is:

[0044] v n =d jn / t n+1 -t n =d n -d n+1 / t n+1 -t n .

[0045] The upper end of the negative electrode plate 7 is connected to the first fixed end 8, and the upper end of the first fixed end 8 is fixed with a first connecting rod 9, and the top of the first connecting rod 9 is connected to a first anchor claw 10, and a first borehole 18 is drilled in the tunnel roof to the unstable rock formation, and the first anchor claw 10 is anchored in the unstable rock formation along the first borehole 18, so that it sinks as the unstable rock formation sinks. At the same time, the second fixed end 11 is connected to the top of the positive electrode plate 6, and the upper end of the second fixed end 11 is fixed with a second connecting rod 12, and the top of the second connecting rod 12 is connected to a second anchor claw 13, and a second borehole 19 is drilled in the tunnel roof to the stable rock formation, and the second anchor claw 13 is anchored in the stable rock formation along the second borehole 19 to keep it stationary.

[0046] In specific use, when the unstable rock formation sinks, it will drive the first anchor claw 10 anchored therein to move downward, the first anchor claw 10 drives the first connecting rod 9 downward, the first connecting rod 9 drives the first anchor end downward, and the first anchor end pushes the negative electrode plate 7 downward. At this time, because the stable rock formation is stable and motionless, the second anchor claw 13, the second connecting rod 12, the second fixed end 11, and the positive electrode plate 6 are all motionless. When the charged particles 2 emitted by the emission source 1 pass through the first space and enter the second space through the second small hole 16, when the negative electrode plate 7 sinks with the unstable rock formation, the charged particles 2 will leave bright strips at different positions on the negative electrode plate 7. Through the above method, the settlement value d of the unstable rock formation in the ith second can be displayed on the display screen 14. ji i=1, 2, 3...n and sedimentation rate v i i=1,2,3……n,when the settlement value d of unstable rock formation in the ith second ji i=1, 2, 3...n and sedimentation rate v i When i=1, 2, 3...n exceeds a preset value, the alarm 20 sounds an alarm.

[0047] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0048] The above describes in detail the preferred embodiments of this patent, but this patent is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A multi-factor mine roadway roof stratum steady-state monitoring alarm device, comprising a first housing (21), characterized in that: The right side of the first shell (21) is fixedly connected to the left side of the second shell (22); the upper and lower surfaces of the inner wall of the first shell (21) are respectively an upper boundary plate (3) and a lower boundary plate (4); two magnetic field generators (5) are fixedly connected to the opposite surfaces of the upper boundary plate (3) and the lower boundary plate (4); a first small hole (15) is provided on the upper surface of the inner wall of the upper boundary plate (3); an emission source (1) is provided above the first small hole (15); a positive electrode plate (6) and a negative electrode plate (7) are respectively slidably connected in the two sliding holes provided on the upper surface of the second shell (22); a second small hole (16) is provided on the left side of the positive electrode plate (6) and the second shell (22); a second connecting rod (12) and a first connecting rod (9) are respectively provided above the positive electrode plate (6) and the negative electrode plate (7); The top end of the first connecting rod (9) is clamped to the inner wall of a first borehole (18) opened on the inner wall of an unstable rock formation through a first anchor claw (10), and the top end of the second connecting rod (12) is clamped to the inner wall of a second borehole (19) opened on the inner wall of a stable rock formation through a second anchor claw (13); A power source (17) is provided on the left side of the positive electrode plate (6), and a display screen (14) and an alarm (20) are electrically connected to the surface of the negative electrode plate (7); The inner walls of the first shell (21) and the second shell (22) are respectively provided with a first space and a second space; The uniform magnetic field generated by the magnetic field generator (5) causes the interior of the first space to be affected by the Lorentz force, thereby causing the charged particles (2) emitted by the emission source to be deflected by 90 degrees, so that they can just pass through the second small hole (16) and enter the second space. Under the action of the uniform electric field generated by the positive electrode plate (6) and the negative electrode plate (7), they are subjected to the horizontal rightward electric field force and vertically collide with the negative electrode plate (7). Then, the display screen (14) outside the negative electrode plate (7) displays the impact position of the charged particles (2) received by the negative electrode plate (7). When the unstable rock layer sinks, the first connecting rod (9) drives the negative electrode plate (7) to vertically displace, and the position of the negative electrode plate (7) impacted by the charged particles (2) changes, and then an alarm is issued through the alarm after detection by the display.

2. The multi-factor mine roadway roof stratum steady-state monitoring and alarm device according to claim 1 is characterized in that: The bottom end of the first connecting rod (9) is fixedly connected to the first fixed end (8) on the upper surface of the negative electrode plate (7), and the bottom end of the second connecting rod (12) is fixedly connected to the second fixed end (11) provided on the upper surface of the positive electrode plate (6).

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