A device for detecting the thickness of roof and intermediate pillars in open-pit mining

Abstract

The present invention provides a device for detecting the thickness of a roof and a spacer in an open-field mining method, and relates to the technical field of mining detection. The device comprises an assembly mechanism, an adjustment mechanism is installed on the assembly mechanism, an extension mechanism is installed on the adjustment mechanism, and an ultrasonic detector is installed on the extension mechanism. Through the above technical scheme, its purpose is: since the front end of the sliding block is rotatably installed with a rotating shaft through a connecting bracket, and the limiting wheels on both sides of the matching gear are installed in the side limiting sheet metal, the matching gear can be driven to rotate around the rotating seat through the limitation of the side limiting sheet metal, and the matching gear will push the movable tooth plate to move horizontally along the limiting slide rail, and the limiting slide rail and the second fixed seat will also follow the sliding block synchronously, so that the L-shaped mounting plate and the upper support plate can be rotated around the rotating shaft as the center, and the angle can be adjusted according to the detection requirements of the gold mine, so that the detection of the equipment has better versatility, thereby improving the accuracy of detecting the roof and the spacer.

Description

Technical Field

[0001] The present invention relates to the technical field of mining detection, in particular to a device for detecting the thickness of roof and pillars in an open-pit mining method. Background Art

[0002] Gold ore is a mineral aggregate with sufficient gold content and can be used industrially. A gold mine is a place where gold is obtained through mining operations. It is an accumulation of industrially usable gold ore of a certain scale formed through mineralization. Open-stop mining, also known as natural support mining, refers to a mining method that mainly relies on the stability of the surrounding rock itself or a small number of pillars and artificial pillars to support the goaf during the recovery process. It is generally suitable for deposits where the ore and surrounding rock are quite stable and a considerable exposed surface is allowed.

[0003] At present, in the existing technology, before gold mining, it is necessary to detect the thickness of the roof and pillars of the gold mine and then simulate post-mining. Most gold mine detections are performed by workers holding ultrasonic detectors. Since the terrain in the gold mine is relatively complex and most mine caves are too narrow, the accuracy of gold mine detection will be affected by workers' self-adjustment. In addition, manual detection will also limit the detection range, affecting the efficiency of gold mine detection. Therefore, the present invention proposes a roof and pillar thickness detection device in open-pit mining method. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art that several mine caves are too narrow, and manual self-adjustment will affect the accuracy of gold mine detection, and manual detection will also lead to limited detection range, affecting the efficiency of gold mine detection.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a device for detecting the thickness of a roof and an intermediate pillar in an open-pit mining method, comprising an assembly mechanism, an adjustment mechanism being installed on the assembly mechanism, an extension mechanism being installed on the adjustment mechanism, an ultrasonic detector being installed on the extension mechanism, and the adjustment mechanism can also support the extension mechanism during the process of adjusting the angle of the ultrasonic detector; the assembly mechanism comprises a main body bracket, a disconnection is provided on one side of the main body bracket, a No. 1 fixing seat is fixedly connected to the four corners of the lower surface of the main body bracket, and a limiting rod is fixedly connected between the No. 1 fixing seats on the same side; the adjusting mechanism comprises a sliding block, side sliders are fixedly connected on both sides of the sliding block, and two side sliders are slidably installed on the limit rod, the sliding block is located in the main body bracket, an electric push rod is fixed between the sliding block and the main body bracket, and a mounting groove is provided on the side of the sliding block close to the disconnection.

[0006] In at least some embodiments, the sliding block is fixedly connected to one side near the disconnection point with two connecting brackets, and a rotating shaft is rotatably installed at the lower ends of the two connecting brackets. An L-shaped mounting plate is fixedly connected to one side of the rotating shaft, and an upper support plate is fixedly connected to one side of the upper end of the L-shaped mounting plate, and driven gears are fixedly connected to both ends of the rotating shaft.

[0007] In at least some embodiments, the lower surface of the sliding block is fixedly connected to a No. 2 fixed seat, a rotating seat is fixed inside the No. 2 fixed seat, a matching gear is rotatably installed inside the rotating seat, and limited slide rails are fixedly connected to both sides of the lower end of the No. 2 fixed seat.

[0008] In at least some embodiments, a movable tooth plate is slidably installed in the limiting slide rail, the lower end of the mating gear is meshedly connected to the movable tooth plate, and the other end of the movable tooth plate is meshedly connected to the driven gear.

[0009] In at least some embodiments, a rotating part is fixed at the outer center of the two mating gears, and a limiting wheel is rotatably installed at one end of the two rotating parts. The outer walls on both sides of the main body bracket are fixed with side connecting rods, and the lower ends of the two side connecting rods are fixed with side limiting sheet metals, and the two limiting wheels are slidably installed in the side limiting sheet metals.

[0010] In at least some embodiments, two No. 2 support sheet metals are rotatably installed on the inner side wall of the mounting groove, a No. 2 connecting seat is rotatably installed between one ends of the two No. 2 support sheet metals, the No. 2 connecting seat is fixedly connected to the outer side wall of the L-shaped mounting plate, and two No. 1 support sheet metals are also rotatably installed on the inner side wall of the mounting groove, the two No. 1 support sheet metals and the two No. 2 support sheet metals are cross-arranged, a No. 1 connecting seat is rotatably installed on one end of the two No. 1 support sheet metals, and the No. 1 connecting seat is fixedly connected to the lower surface of the upper support plate.

[0011] In at least some embodiments, the extending mechanism includes four lower supports, which are fixed at the four corners of the upper surface of the upper support plate. Two of the lower supports on the same side are rotatably mounted with mounting shafts, both ends of the two mounting shafts are fixed with connecting sheet metals, a central shaft is fixed between the upper ends of the two connecting sheet metals, upper supports are rotatably mounted at both ends of the two central shafts, and ultrasonic detectors are fixed to the upper ends of the four upper supports.

[0012] In at least some embodiments, a transmission connecting rod is rotatably installed in the middle of the central axis on one side, a movable block is rotatably installed at the lower end of the transmission connecting rod, a driving screw is fixed at the center of the movable block, a rotating sheet metal is rotatably installed at one end of the driving screw, the rotating sheet metal is fixed to the edge of one side of the upper support plate, one end of the driving screw is meshed with a threaded seat, the threaded seat is fixed to the upper surface of the upper support plate, and one end of the driving screw is fixed to a knob.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are:

[0014] In the present invention, the driving screw is driven to rotate by rotating the knob according to the gold mine environment, so that the driving screw can move horizontally along the threaded seat. The driving screw pushes the central axis on one side to move to one side through the transmission connecting rod, wherein the lower support is installed together by the installation shaft, the connecting sheet metal, the central axis and the upper support, which can push the ultrasonic detector to extend, thereby realizing adjustment according to the gold mine environment, enhancing the detection capability of the detection device and making it more widely applicable to special gold mine ranges.

[0015] The cam is fixed on the upper support plate and the lower support plate is fixed on the lower support plate, and the upper support plate and the upper support plate are connected to each other via an L-shaped mounting plate.

[0016] In the present invention, the L-shaped mounting plate and the upper support plate rotate around the rotation axis, wherein the two No. 1 support sheet metals and the two No. 2 support sheet metals are cross-arranged and respectively connected to the L-shaped mounting plate and the upper support plate through the No. 1 connecting seat and the No. 2 connecting seat, thereby enhancing the stability of the upper support plate during the angle adjustment process and better assisting in the detection of the roof and pillars in the gold mine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic perspective view of the overall structure of a device for detecting the thickness of roof and pillars in an open-stop mining method proposed by the present invention;

[0018] Figure 2 This is a schematic perspective view of the other side of the overall structure of a device for detecting the thickness of roof and pillars in an open-pit mining method proposed by the present invention;

[0019] Figure 3 A schematic three-dimensional diagram of the assembly structure of a device for detecting the thickness of roof and pillars in an open-pit mining method proposed by the present invention;

[0020] Figure 4 A schematic perspective view of the combined structure of the adjustment mechanism and the extension mechanism of a device for detecting the thickness of roof and pillars in an open-stop mining method proposed by the present invention;

[0021] Figure 5 A schematic perspective view of the combined structure of the adjustment mechanism and assembly mechanism of a device for detecting the thickness of roof and pillars in an open-pit mining method proposed by the present invention;

[0022] Figure 6 A schematic perspective view of the overall structure of an adjustment mechanism for detecting the thickness of roof and pillars in an open-stop mining method proposed by the present invention;

[0023] Figure 7 A schematic perspective view of the structure of the adjustment mechanism of a device for detecting the thickness of roof and pillars in an open-pit mining method proposed by the present invention;

[0024] Figure 8 The present invention provides a schematic three-dimensional diagram of the extension mechanism structure of a roof and pillar thickness detection device in an open-pit mining method.

[0025] Legend: 100, assembly mechanism; 200, adjustment mechanism; 300, extension mechanism; 400, ultrasonic detector; 101, main frame; 102, No. 1 fixing seat; 103, limit rod; 104, disconnection point; 201, electric push rod; 202, sliding block; 203, side slider; 204, connecting bracket; 205, rotating shaft; 206, driven gear; 207, L-shaped mounting plate; 208, upper support plate; 209, side connecting rod; 210, side limit sheet metal; 211, rotating seat; 212, No. 2 fixing seat ; 213. Mating gear; 214. Movable tooth plate; 215. Limiting slide rail; 216. Mounting slot; 217. Rotating part; 218. Limiting wheel; 219. Connecting seat No. 1; 220. Supporting sheet metal No. 1; 221. Supporting sheet metal No. 2; 222. Connecting seat No. 2; 301. Rotating sheet metal; 302. Driving screw; 303. Knob; 304. Movable block; 305. Threaded seat; 306. Lower support; 307. Mounting shaft; 308. Connecting sheet metal; 309. Upper support; 310. Transmission connecting rod; 311. Center axis. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Embodiment, according to Figures 1-8An embodiment of the present invention provides a device for detecting the thickness of roof and pillars in an open-pit mining method, comprising an assembly mechanism 100, an adjustment mechanism 200 mounted on the assembly mechanism 100, an extension mechanism 300 mounted on the adjustment mechanism 200, an ultrasonic detector 400 mounted on the extension mechanism 300, and the adjustment mechanism 200 can also support the extension mechanism 300 during the process of adjusting the angle of the ultrasonic detector 400; Figure 3 As shown, the assembly mechanism 100 includes a main bracket 101, a disconnection 104 is provided on one side of the main bracket 101, and a No. 1 fixed seat 102 is fixedly connected to the four corners of the lower surface of the main bracket 101, and a limit rod 103 is fixedly connected between the No. 1 fixed seat 102 on the same side; the adjustment mechanism 200 includes a sliding block 202, and side sliders 203 are fixedly connected on both sides of the sliding block 202, and the two side sliders 203 are slidably installed on the limit rod 103, the sliding block 202 is located in the main bracket 101, and an electric push rod 201 is fixed between the sliding block 202 and the main bracket 101, and an installation groove 216 is provided on the side of the sliding block 202 near the disconnection 104, and the sliding block 202 can be driven by the electric push rod 201 to move horizontally along the limit rod 103 in the main bracket 101.

[0029] like Figure 5-Figure 6As shown, the sliding block 202 is fixedly connected to two connecting brackets 204 on one side near the disconnection point 104, and the lower ends of the two connecting brackets 204 are rotatably mounted with a rotating shaft 205, one side of the rotating shaft 205 is fixedly connected to an L-shaped mounting plate 207, and one side of the upper end of the L-shaped mounting plate 207 is fixedly connected to an upper supporting plate 208, and both ends of the rotating shaft 205 are fixedly connected to a driven gear 206, and the lower surface of the sliding block 202 is fixedly connected to a No. 2 fixed seat 212, and a rotating seat 211 is fixedly connected to the No. 2 fixed seat 212, and a matching gear 213 is rotatably mounted in the rotating seat 211. The lower ends of the second fixed seat 212 are fixed with limited slide rails 215 on both sides, and a movable tooth plate 214 is slidably installed in the limited slide rail 215. The lower end of the matching gear 213 is meshed with the movable tooth plate 214, and the other end of the movable tooth plate 214 is meshed with the driven gear 206. The outer centers of the two matching gears 206 are fixed with rotating parts 217, and one end of the two rotating parts 217 is rotatably installed with limited wheels 218. The outer walls of both sides of the main bracket 101 are fixed with side connecting rods 209, and the lower ends of the two side connecting rods 209 are fixed with side limiting plates. The two limiting wheels 218 are both slidably mounted in the side limiting sheet metal 210. Since the front end of the sliding block 202 is rotatably mounted with a rotating shaft 205 through the connecting bracket 204, and the surface of the rotating shaft 205 is connected to the upper supporting plate 208 through the L-shaped mounting plate 207, the upper supporting plate 208 and the connecting bracket 204 move synchronously with the sliding block 202. During the movement, a matching gear 213 is installed through the second fixing seat 212 on the lower surface of the sliding block 202, and the limiting wheels 218 on both sides of the matching gear 213 are installed in the side limiting sheet metal 210. The limit can drive the matching gear 213 to rotate around the rotating seat 211, and the matching gear 213 will push the movable tooth plate 214 to move horizontally along the limiting slide rail 215. The limiting slide rail 215 and the second fixed seat 212 will also follow the sliding block 202 synchronously. The movable tooth plate 214 drives the driven gear 206 to rotate after engagement, so that the L-shaped mounting plate 207 and the upper support plate 208 can rotate around the rotating shaft 205. The angle can be adjusted according to the detection needs of the gold mine, so that the detection of the equipment has better versatility, thereby improving the accuracy of detecting the top plate and the intermediate column.

[0030] like Figure 7As shown, the inner wall of the mounting groove 216 is rotatably mounted with two No. 2 support sheet metals 221, and a No. 2 connecting seat 222 is rotatably mounted between one end of the two No. 2 support sheet metals 221. The No. 2 connecting seat 222 is fixed to the outer wall of the L-shaped mounting plate 207. The inner wall of the mounting groove 216 is also rotatably mounted with two No. 1 support sheet metals 220. The two No. 1 support sheet metals 220 and the two No. 2 support sheet metals 221 are arranged crosswise, and the two No. 1 support sheet metals 220 are rotatably mounted at one end of the No. 1 connecting seat 222. Seat 219, the No. 1 connecting seat 219 is fixed to the lower surface of the upper support plate 208, and rotates around the rotating shaft 205 on the L-shaped mounting plate 207 and the upper support plate 208, wherein the two No. 1 supporting sheet metals 220 and the two No. 2 supporting sheet metals 221 are cross-arranged and are respectively connected to the L-shaped mounting plate 207 and the upper support plate 208 through the No. 1 connecting seat 219 and the No. 2 connecting seat 222, thereby enhancing the stability of the upper support plate 208 during the angle adjustment process, and better assisting in the detection of the roof and pillars in the gold mine.

[0031] like Figure 8 As shown, the extending mechanism 300 includes four lower supports 306, and the four lower supports 306 are fixedly connected to the four corners of the upper surface of the upper support plate 208. The two lower supports 306 on the same side are rotatably installed with mounting shafts 307, and both ends of the two mounting shafts 307 are fixedly connected to connecting sheet metals 308. A central shaft 311 is fixedly connected between the upper ends of the two connecting sheet metals 308, and upper supports 309 are rotatably installed at both ends of the two central shafts 311. The upper ends of the four upper supports 309 are fixedly connected to ultrasonic detectors 400, and a transmission connecting rod 310 is rotatably installed in the middle of the central shaft 311 on one side. The lower end of the transmission connecting rod 310 is rotatably installed. A movable block 304 is installed, and a driving screw 302 is fixed at the center of the movable block 304. A rotating sheet metal 301 is rotatably installed on one end of the driving screw 302. The rotating sheet metal 301 is fixed to the edge of one side of the upper support plate 208. One end of the driving screw 302 is meshed with a threaded seat 305. The threaded seat 305 is fixed to the upper surface of the upper support plate 208. One end of the driving screw 302 is fixed with a knob 303. The knob 303 is rotated according to the gold mine environment to drive the driving screw 302 to rotate. One end of the driving screw 302 is meshed with the threaded seat 305, so that the driving screw 302 can move horizontally along the threaded seat 305. One end of the driving screw 302 can push the central axis 311 on one side to move to one side through the movable block 304 and the transmission connecting rod 310, wherein the lower support 306 is rotated and installed together through the installation shaft 307, the connecting sheet metal 308, the central axis 311 and the upper support 309, which can push the ultrasonic detector 400 to extend, thereby realizing adjustment according to the gold mine environment, enhancing the detection capability of the detection device and making it more widely applicable to special gold mine ranges.

[0032] The working principle of the present invention is as follows: when the open-field mining method is used to detect the roof and pillars in the gold mine, the detector holds the detection device and starts the electric push rod 201 to drive the sliding block 202 located in the main bracket 101 to move horizontally along the limit rod 103. Since the front end of the sliding block 202 is rotatably mounted with a rotating shaft 205 through the connecting bracket 204, and the surface of the rotating shaft 205 is connected to the upper supporting plate 208 through the L-shaped mounting plate 207, the upper supporting plate 208 and the connecting bracket 204 follow the rotation of the upper supporting plate 208. The sliding block 202 moves synchronously. During the movement, a matching gear 213 is installed through the second fixed seat 212 on the lower surface of the sliding block 202, and the limiting wheels 218 on both sides of the matching gear 213 are installed in the side limiting sheet metal 210. After the side limiting sheet metal 210 is limited, the matching gear 213 can be driven to rotate around the rotating seat 211 as the center. The matching gear 213 will push the movable tooth plate 214 to move horizontally along the limiting slide rail 215, and the limiting slide rail 215 and the second fixed seat 212 will also move horizontally. Synchronous with the sliding block 202, the movable tooth plate 214 drives the driven gear 206 to rotate after meshing, so that the L-shaped mounting plate 207 and the upper supporting plate 208 can rotate around the rotating shaft 205 as the center. The angle can be adjusted according to the detection requirements of the gold mine, so that the detection of the equipment has better versatility, thereby improving the accuracy of detecting the top plate and the intermediate column. When the L-shaped mounting plate 207 and the upper supporting plate 208 rotate around the rotating shaft 205 as the center, the two No. 1 support sheet metals 220 and the two No. 2 support sheet metals are rotated. The support sheet metal 221 is arranged crosswise and is respectively connected to the L-shaped mounting plate 207 and the upper support plate 208 through the No. 1 connecting seat 219 and the No. 2 connecting seat 222, thereby enhancing the stability of the upper support plate 208 during the angle adjustment process, better assisting in the detection of the roof and pillars in the gold mine, and rotating the knob 303 according to the gold mine environment to drive the drive screw 302 to rotate. One end of the drive screw 302 is engaged and connected to the threaded seat 305, so that the drive screw 302 can move horizontally along the threaded seat 305. One end of the drive screw 302 can push the central axis 311 on one side to move to one side through the movable block 304 and the transmission connecting rod 310, wherein the lower support 306 is rotatably installed together through the mounting shaft 307, the connecting sheet metal 308, the central axis 311 and the upper support 309, which can push the ultrasonic detector 400 to extend, thereby realizing adjustment according to the gold mine environment, enhancing the detection capability of the detection device and making it more widely applicable to special gold mines.

[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other form. Any person skilled in the art may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A device for detecting the thickness of roof and pillars in an open-pit mining method, comprising an assembly mechanism (100), characterized in that: The assembly mechanism (100) is equipped with an adjustment mechanism (200), the adjustment mechanism (200) is equipped with an extension mechanism (300), the extension mechanism (300) is equipped with an ultrasonic detector (400), and the adjustment mechanism (200) can also support the extension mechanism (300) during the process of adjusting the angle of the ultrasonic detector (400); The assembly mechanism (100) comprises a main frame (101), a disconnection portion (104) is provided on one side of the main frame (101), a number one fixing seat (102) is fixedly connected at four corners of the lower surface of the main frame (101), and a limiting rod (103) is fixedly connected between the number one fixing seats (102) on the same side; The adjusting mechanism (200) comprises a sliding block (202), side sliders (203) are fixedly connected to both sides of the sliding block (202), the two side sliders (203) are slidably mounted on the limiting rod (103), the sliding block (202) is located in the main frame (101), an electric push rod (201) is fixedly connected between the sliding block (202) and the main frame (101), and a mounting groove (216) is provided on one side of the sliding block (202) close to the disconnection point (104); Two connecting brackets (204) are fixedly connected to one side of the sliding block (202) near the disconnection point (104); a rotating shaft (205) is rotatably mounted on the lower ends of the two connecting brackets (204); an L-shaped mounting plate (207) is fixedly connected to one side of the rotating shaft (205); an upper supporting plate (208) is fixedly connected to one side of the upper end of the L-shaped mounting plate (207); and driven gears (206) are fixedly connected to both ends of the rotating shaft (205); The lower surface of the sliding block (202) is fixedly connected to a second fixed seat (212), a rotating seat (211) is fixedly connected inside the second fixed seat (212), a matching gear (213) is rotatably installed inside the rotating seat (211), and both sides of the lower end of the second fixed seat (212) are fixedly connected to limited slide rails (215); A movable tooth plate (214) is slidably installed in the limiting slide rail (215), the lower end of the matching gear (213) is meshedly connected to the movable tooth plate (214), and the other end of the movable tooth plate (214) is meshedly connected to the driven gear (206); The outer centers of the two mating gears (213) are fixedly connected with rotating parts (217), one end of each of the rotating parts (217) is rotatably mounted with a limiting wheel (218), the outer walls on both sides of the main frame (101) are fixedly connected with side connecting rods (209), the lower ends of the two side connecting rods (209) are fixedly connected with side limiting sheet metals (210), and the two limiting wheels (218) are slidably mounted in the side limiting sheet metals (210); When the open-field mining method is used to detect the roof and pillars in the gold mine, the detector holds the detection device and starts the electric push rod (201) to drive the sliding block (202) located in the main support (101) to move horizontally along the limit rod (103). Since the front end of the sliding block (202) is rotatably mounted with a rotating shaft (205) through the connecting bracket (204), and the surface of the rotating shaft (205) is connected to the upper supporting plate (208) through the L-shaped mounting plate (207), the upper supporting plate (208) and the connecting bracket (204) move synchronously with the sliding block (202). During the movement, a matching gear (213) is installed through the second fixed seat (212) on the lower surface of the sliding block (202), and the matching gear (213) is installed. The limiting wheels (218) on both sides of the gear (213) are installed in the side limiting sheet metal (210). After the side limiting sheet metal (210) is limited, the matching gear (213) can be driven to rotate around the rotating seat (211). The matching gear (213) will push the movable tooth plate (214) to move horizontally along the limiting slide rail (215). The limiting slide rail (215) and the second fixed seat (212) will also follow the sliding block (202) synchronously. The movable tooth plate (214) drives the driven gear (206) to rotate through engagement, so that the L-shaped mounting plate (207) and the upper supporting plate (208) can be rotated around the rotating shaft (205). The angle can be adjusted according to the detection requirements of the gold mine.

2. The device for detecting roof and pillar thickness in open-stop mining according to claim 1, characterized in that: Two No. 2 support sheet metals (221) are rotatably mounted on the inner side wall of the installation groove (216), and a No. 2 connecting seat (222) is rotatably mounted between one end of the two No. 2 support sheet metals (221), and the No. 2 connecting seat (222) is fixed to the outer side wall of the L-shaped installation plate (207). Two No. 1 support sheet metals (220) are also rotatably mounted on the inner side wall of the installation groove (216), and the two No. 1 support sheet metals (220) and the two No. 2 support sheet metals (221) are arranged crosswise, and a No. 1 connecting seat (219) is rotatably mounted on one end of the two No. 1 support sheet metals (220), and the No. 1 connecting seat (219) is fixed to the lower surface of the upper support plate (208).

3. The device for detecting roof and pillar thickness in open-stop mining according to claim 1, characterized in that: The extending mechanism (300) includes four lower supports (306), the four lower supports (306) are fixedly connected to the four corners of the upper surface of the upper support plate (208), and the two lower supports (306) on the same side are rotatably mounted with a mounting shaft (307), both ends of the two mounting shafts (307) are fixedly connected to a connecting sheet metal (308), a central axis (311) is fixedly connected between the upper ends of the two connecting sheet metals (308), and upper supports (309) are rotatably mounted at both ends of the two central axes (311), and the upper ends of the four upper supports (309) are fixedly connected to an ultrasonic detector (400).

4. The device for detecting roof and pillar thickness in open-stop mining according to claim 3, characterized in that: A transmission connecting rod (310) is rotatably mounted on the middle of the central shaft (311) on one side, a movable block (304) is rotatably mounted on the lower end of the transmission connecting rod (310), a driving screw (302) is fixedly connected to the center of the movable block (304), one end of the driving screw (302) is rotatably mounted with a rotating sheet metal (301), the rotating sheet metal (301) is fixedly connected to the edge of one side of the upper support plate (208), one end of the driving screw (302) is meshedly connected with a threaded seat (305), the threaded seat (305) is fixedly connected to the upper surface of the upper support plate (208), and one end of the driving screw (302) is fixedly connected to a knob (303).

Images