Construction process and protection device for mechanized operation line under rock burst condition

Abstract

The present application relates to the technical field of coal mine, especially to a mechanized operation line construction process and protection device under the condition of rock burst, comprising the following steps: step one, installing a monitoring and early warning platform in a rock burst mine, uploading coal body stress monitoring, microseismic monitoring and drilling data monitoring data to the platform, installing a rock burst stress online monitoring system in the rock burst danger area of the mine, and monitoring the accumulation and change of static load in the near-field system of mining surrounding rock through high-precision stress sensors embedded in the coal body; step two, installing a protection device every specified distance in the high rock burst danger area; the device is provided with a supporting assembly, which has a triangular supporting effect, and is beneficial to improving the protection effect of the protection base and the arc-shaped protection top, thereby avoiding the collapse of the protection base and the arc-shaped protection top, and improving the protection effect on the construction personnel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coal mines, in particular to a mechanized operation line construction process and protection device under the condition of rock burst. BACKGROUND

[0002] Rock burst refers to the sudden fracture and ejection of rock caused by the release of stress concentration, which poses a serious threat to mine safety. Conducting mechanized operation construction under the condition of rock burst is a complex and dangerous task, which requires a series of technical and management measures to ensure the safety and efficiency of construction.

[0003] Under the condition of rock burst, if the effect of the danger relief measures is not ideal, the construction personnel inside the roadway will encounter safety hazards, therefore, while conducting the mechanized operation line construction, protection measures need to be set up inside the roadway to provide protection for the construction personnel when the effect of the danger relief measures is not ideal. SUMMARY

[0004] The present application aims to solve the shortcomings in the prior art and provides a mechanized operation line construction process and protection device under the condition of rock burst.

[0005] In a first aspect, the present application provides a mechanized operation line construction process under the condition of rock burst, comprising the following steps:

[0006] Step one, install a monitoring and early warning platform in the rock burst mine, upload the coal body stress monitoring, microseismic monitoring and drilling data monitoring data to the platform, install an impact stress online monitoring system in the impact dangerous area divided according to the mine, bury high-precision stress sensors in the coal body to monitor the accumulation and change of static load in the near-field system of mining surrounding rock in real time;

[0007] Step two, install a protection device every specified distance in the divided high impact dangerous area, the construction section of the two crossheading of the working face is a weak impact dangerous area, according to the business contact book issued by the mine, the pressure relief method adopts the mining side of the crossheading side and the coal pillar side, sets up pressure relief holes, constantly follows up the pressure relief work with the continuous advancement of the excavation face, installs a protection device in the construction section of the weak impact dangerous area, and moves the protection device synchronously with the forward movement of the construction section;

[0008] Step 3: Decompression treatment is carried out in the area where bottom coal is left in the tunneling face. Decompression is achieved by drilling decompression holes on the side of the bottom coal pillar. In areas where the bottom coal thickness is ≥10 meters, the borehole length is 10m. In areas where the bottom coal thickness is less than 10m, drilling continues until rock is encountered, with intervals of 3.1-3.3m, perpendicular to the coal face and inclined downwards at 60°. The depth of the decompression hole reaches the bottom of the coal seam, with a hole diameter of Φ153mm. The distance from the face is less than or equal to 30m. At the face, three holes with a diameter of 150-155mm are drilled horizontally, with a hole depth of 50m. When the distance from the tunneling face to the bottom of the decompression hole is less than 10m, the next round of drilling is carried out. This cycle is repeated, and the decompression holes are sealed in time after completion.

[0009] Step 4: When an impact hazard is detected at the tunnel face, the hazard is relieved and pressure is reduced by increasing the number of face boreholes to 5. Other parameters are the same as the pressure relief parameters. When an impact hazard is detected on both sides of the roadway, the danger range is first determined by the drill cuttings method, and then hazard relief measures are taken. The boreholes should be staggered with the previous pressure relief boreholes. If the stress concentration is high, the construction speed of large-diameter boreholes is slow, or the hazard relief effect is not obvious, coal seam blasting or other hazard relief measures should be implemented.

[0010] Step 5: When a rockburst hazard is detected at the working face, and large-diameter boreholes cannot relieve the pressure in time or the pressure relief effect is not obvious, coal blasting can be carried out to relieve the pressure in the coal body on both sides of the roadway in the dangerous area of ​​the working face. The distance from the detonation point to the blasting location shall not be less than 300m, and the time to avoid the blast shall not be less than 30min.

[0011] Step Six: When the aforementioned hazard mitigation work is not effective, blasting hazard mitigation measures shall be taken for the roadway floor. The construction location is the bottom corners of both sides of the roadway, and construction shall proceed outward from the coal face.

[0012] Secondly, a protective device is provided for a mechanized construction line under rock burst conditions, the protective device comprising:

[0013] A protective base, the top of which is fixed with an arc-shaped protective top;

[0014] Two sets of second flip frames, two second flip frames form a set, the second flip frames in the same set are rotatably connected, and the opposite ends of the second flip frames in the same set are rotatably mounted with fixed bases, the fixed bases are fixedly connected to the protective base;

[0015] Two support components are respectively installed below the two sets of the second flip frames, and are activated in case of danger to push the protective base to both sides when the arc-shaped protective top is under force, and push the arc-shaped protective top upward when the protective base is under force;

[0016] After the protective base and the arc-shaped protective top are arranged inside the roadway, when a collapse occurs inside the roadway, construction personnel who cannot escape can hide inside the protective base and the arc-shaped protective top to wait for rescue, which is beneficial to avoid the safety hazard that the construction personnel are hit by falling stones during the collapse;

[0017] The stones falling during the collapse can be shielded by the protective base and the arc-shaped protective top, thereby protecting the construction personnel inside. When the stones fall, the support assembly is started, the support assembly forms a triangular support together with the second turnover frame between the two sides of the arc-shaped protective top and the protective base, when the arc-shaped protective top is subjected to an external force, the triangular support of the support assembly divides and applies the force to the two side walls of the protective base, thereby forming an action force that pushes the side wall of the protective base outward from the inside of the protective base, which counteracts the action force of the stones falling from the outside hitting the protective base, and the protective base can be supported by the side wall of the roadway. Similarly, when the side wall of the protective base is subjected to an external force, the same support and counteraction effect is achieved, thereby being beneficial to improve the protection effect of the protective base and the arc-shaped protective top, thereby being beneficial to avoid the collapse of the protective base and the arc-shaped protective top, and being beneficial to improve the protection effect on the construction personnel.

[0018] Preferably, the support assembly comprises:

[0019] Two groups of first turnover frames, the two first turnover frames are a group, and the first turnover frames in the same group are rotationally connected to each other;

[0020] Two groups of sliding bases, the two sliding bases are a group, and the sliding bases in the same group are rotationally installed at opposite ends of the two first turnover frames in the same group;

[0021] Two first sliding grooves symmetrically formed in the inner walls of the two sides of the protective base, and the sliding bases are slidingly installed in the corresponding first sliding grooves;

[0022] Two clamping mechanisms, one of the clamping mechanisms is installed between the second turnover frame and the first turnover frame located above, and the other clamping mechanism is installed between the two first turnover frames, and the clamping mechanism is used to connect the second turnover frame and the two groups of first turnover frames after being started and form a support;

[0023] Two limiting mechanisms installed on the side walls of the protective base and used to limit and support the sliding bases;

[0024] When a collapse occurs inside the roadway, the limiting mechanism releases the limiting action on the sliding base, so that the sliding base slides downward along the first sliding groove under the action of gravity, thereby causing the two groups of first turnover frames to slide downward and expand;

[0025] When necessary, a pushing assembly can be arranged at the sliding base, such as an electric push rod, so that after the limiting mechanism is released, the sliding base can be driven to move downward by the pushing action of the electric push rod to drive the two groups of first turnover frames to expand, thereby facilitating the avoidance of the situation that the sliding base is difficult to slide downward under the action of gravity due to resistance during the expansion of the first turnover frames, thereby facilitating the smooth expansion of the first turnover frames.

[0026] During the expansion of the two groups of first turnover frames, the clamping assembly is driven to complete the clamping action on the two groups of first turnover frames, so that the upper first turnover frame and the second turnover frame remain in the expanded position through the clamping action of the clamping assembly, and the two groups of first turnover frames remain in the expanded position through the clamping action of the clamping assembly. At this time, when the protective base and the arc-shaped protective top are stressed, for example, when the arc-shaped protective top is stressed, the arc-shaped protective top generates a downward force under the action of external force, and the downward force is applied to the rotating connection of the first turnover frame, thereby applying a force to the two sides of the protective base through the first turnover frame, thereby applying an inward and outward force to the protective base. When the protective base is externally stressed, the inward and outward force can balance the external stress, and when the protective base is not externally stressed, the protective base can extrude the inner wall of the tunnel to form support, thereby facilitating the avoidance of the collapse of the protective base and the arc-shaped protective top under the action of external force.

[0027] The whole formed by the protective base and the arc-shaped protective top is independent of the inside of the tunnel, so that when a crack is generated in the inside of the tunnel under the action of impact ground pressure, a safety hazard is not generated simultaneously, thereby facilitating the temporary protection of the construction personnel.

[0028] Preferably, the clamping mechanism comprises:

[0029] A vertical limiting frame, the top of which is fixedly connected with the top of the protective base or the rotating shaft of the upper first turnover frame;

[0030] A second sliding groove is opened in the inside of the vertical limiting frame, and the first turnover frame is slidingly connected in the inside of the second sliding groove through a sliding block connected with the rotating shaft;

[0031] A limiting rod is transversely slidingly installed in the inside of the second sliding groove, and an arc-shaped groove is opened in the bottom of the limiting rod;

[0032] A first spring is fixed between the side wall upper end of the limiting rod and the second sliding groove;

[0033] An arc-shaped rod is slidingly inserted into the bottom of the vertical limiting frame;

[0034] An arc-shaped pushing shell is sleeved on the end of the arc-shaped rod, and a second spring is mounted between the arc-shaped rod and the inside of the arc-shaped pushing shell. When the slider slides downward and extrudes the arc-shaped rod, the arc-shaped pushing shell pushes the bottom of the limiting rod laterally.

[0035] When the first turnover frame slides downward, the slider connected at the first turnover frame rotating shaft slides downward along the second sliding groove. After the slider slides downward, the first spring pushes the top of the limiting rod laterally to a position above the slider after losing the extrusion of the slider. After the slider slides to the bottom of the second sliding groove, the slider pushes the arc-shaped rod downward, so that the arc-shaped rod slides to push the second spring. After the slider completely slides to the bottom of the second sliding groove, the bottom of the limiting rod loses the extrusion of the slider. At this time, the compressed second spring pushes the arc-shaped pushing shell by the elastic force generated by its compression, so that the arc-shaped pushing shell pushes the bottom of the limiting rod, so that the bottom of the limiting rod moves laterally, thereby pushing the limiting rod to completely move laterally to the top of the slider. The arc-shaped groove at the bottom of the limiting rod fits the top of the slider, completely limiting the slider, thereby completely limiting the first turnover frame after moving downward, so that the vertical limiting frame connected with the arc-shaped protective top can push the slider downward after being subjected to the top force, thereby pushing the first turnover frame, so that the first turnover frame can push the first turnover frame below after being subjected to force, thereby transmitting the force. A triangular support is formed between the triangular frame formed between the first turnover frame and the vertical limiting frame, thereby facilitating the stability of the protective base and the arc-shaped protective top.

[0036] Preferably, the limiting mechanism comprises:

[0037] A stop block is slidingly installed in the first clearance groove on the side wall of the protective base. The stop block has an L-shaped structure. The upper horizontal plate of the stop block supports and limits the upper sliding base. The lower horizontal plate of the stop block supports and limits the lower sliding base.

[0038] A first air cylinder is fixed in the first clearance groove. The first air cylinder drives the stop block to move through a telescopic rod.

[0039] The two horizontal plates of the stop block can support and limit the two sliding bases, thereby maintaining the initial state of the sliding bases. After the first air cylinder is started, the stop block is driven to move by the telescopic rod, so that the stop block slides along the first clearance groove and is separated from the bottom of the sliding base, thereby causing the sliding base to lose the supporting effect and slide downward under the action of gravity, thereby driving the first turnover frame to unfold.

[0040] Preferably, it further comprises:

[0041] A plurality of rollers are installed on the bottom of the protective base.

[0042] A plurality of supporting blocks are arranged one-to-one with the rollers and are arranged on the adjacent sides of the rollers;

[0043] A plurality of mounting boxes are fixed in the interior of the protective base, and a second air cylinder is fixed in the interior of each of the mounting boxes. The second air cylinder is arranged one-to-one with the supporting blocks, and the second air cylinder is fixedly connected with the corresponding supporting block through an extension rod;

[0044] When the protective base needs to be moved, the second air cylinder is started to drive the supporting block to move upward, so that the supporting block no longer supports the protective base. At this time, the roller is grounded, and an acting force applied to the protective base can drive the protective base to move.

[0045] It should be noted that the driving assembly is installed on the roller to drive the roller to rotate, for example, a motor is installed to drive the roller to rotate, so that the roller has an active rotating action and can drive the protective base to move.

[0046] When the protective base does not need to be moved, the second air cylinder is started to drive the supporting block to move downward, so that the supporting block supports the protective base, so that the protective base is not easily moved.

[0047] Preferably, it further comprises:

[0048] Two buffer plates are respectively rotatably installed in the through openings formed in the two side walls of the protective base, and a plurality of limiting grooves are formed in the two sides of the two buffer plates.

[0049] Two groups of limiting blocks, two limiting blocks in the same group are respectively slidably inserted into the limiting grooves on the two sides of the buffer plate, and the limiting blocks are slidably installed in the second accommodating grooves formed in the side walls of the protective base.

[0050] Two groups of third air cylinders, two third air cylinders in the same group are installed in the limiting grooves on the two sides of the buffer plate, and the third air cylinders drive the limiting blocks to move through extension rods.

[0051] When the impact force of external falling stones on the protective base approaches the bearing limit of the protective base, the side wall of the protective base is large in area and is more likely to be damaged under stress. At this time, the third air cylinder is controlled to be started, the third air cylinder drives the limiting block to move out of the interior of the limiting groove, so that the buffer plate loses the limiting. At this time, the buffer plate is turned over under the action of external force, and the two buffer plates are turned over and approach each other to form a triangular area. The construction personnel can hide under the triangular area. At this time, the protection area is reduced, and the buffer plate in the form of triangular support after reduction can improve the protection force, thereby being beneficial to improving the protection of the construction personnel.

[0052] Preferably, it further comprises:

[0053] Two inclined blocks are fixed on the opposite sides of the top of the two buffer plates respectively;

[0054] Two telescopic blocks are slidably inserted into the installation slots in the two inclined blocks respectively;

[0055] Two groups of third springs, a plurality of third springs form a group, and the two groups of third springs are linearly arranged and fixed between the inside of the two installation slots and the telescopic blocks;

[0056] When the two buffer plates approach each other, the two telescopic blocks first collide with each other, and then press the third springs, so that the third springs can buffer the collision of the two buffer plates, thereby reducing the damage of the collision of the two buffer plates, and buffering the impact force when affected by falling rocks.

[0057] Preferably, further comprising:

[0058] A pressure sensor is installed on the top of the arc-shaped protective roof;

[0059] Warning lights are installed on both ends of the protective base;

[0060] When the top of the arc-shaped protective roof is affected by falling rocks, the pressure sensor is pressed to generate pressure information, and at this time the warning light is started when the pressure sensor detects the pressure information, so that the warning light warns the position of the protective base, which is helpful for construction personnel to quickly find the protective base to avoid.

[0061] Preferably, further comprising:

[0062] A warning bracelet is placed on the body of the worker;

[0063] A distance detector is installed on the warning bracelet for detecting the distance between the warning bracelet and the protective base adjacent to the two ends of the tunnel;

[0064] A control unit is installed in the inside of the protective base for controlling the distance detector to start detecting the distance between the warning bracelet and the protective base adjacent to the two ends of the tunnel when the pressure sensor is pressed, and selecting the protective base corresponding to the smaller data after comparing the two detection data. The control unit is also used to control the warning light to emit the same color warning light as the warning light on the selected protective base;

[0065] The distance detector detects the distance between the warning bracelet and the protective base adjacent to the two ends of the tunnel, compares the two detected data, selects the protective base corresponding to the smaller distance value, and then controls the warning bracelet to emit warning light of the same color as the selected protective base, so that the construction personnel run to the protective base with a short distance to avoid, thereby reducing the decision-making time of the construction personnel and improving the protection.

[0066] Compared with the prior art, the present application has the following beneficial effects:

[0067] 1、The setting of the supporting assembly makes it easier to improve the protective effect of the protective base and the arc-shaped protective top through the triangular supporting effect of the supporting assembly, thereby avoiding the collapse of the protective base and the arc-shaped protective top and improving the protection effect on the construction personnel.

[0068] 2、The setting of the buffer plate makes the two buffer plates close to each other to form a triangular area after being flipped at the same time, and the construction personnel can hide under the triangular area, at which time the protection area is reduced, and the reduced triangularly supported buffer plate can improve the protection, thereby improving the protection on the construction personnel. BRIEF DESCRIPTION OF DRAWINGS

[0069] Figure 1 It is a process flow diagram of the present application.

[0070] Figure 2 It is a schematic diagram of the overall structure of the protective device of the present application.

[0071] Figure 3 It is a schematic diagram of the structure after the overall section of the protective device of the present application Figure 1 .

[0072] Figure 4 It is an enlarged structure schematic diagram of A in the present application Figure 3 .

[0073] Figure 5 It is an enlarged structure schematic diagram of B in the present application Figure 3 .

[0074] Figure 6 It is a schematic diagram of the structure after the overall section of the protective device of the present application Figure 2 .

[0075] Figure 7 It is an enlarged structure schematic diagram of C in the present application Figure 6 .

[0076] Figure 8 It is an enlarged structure schematic diagram of D in the present application Figure 6 .

[0077] Figure 9 The structure diagram after the profile of the buffer plate of the application.

[0078] In the figure: 101, protective base; 102, arc-shaped protective top; 2, first turnover frame; 201, sliding base; 202, first sliding groove; 203, second turnover frame; 3, vertical limiting frame; 301, second sliding groove; 302, limiting rod; 303, sliding block; 304, first spring; 305, arc-shaped groove; 4, arc-shaped rod; 401, arc-shaped pushing shell; 402, second spring; 5, stop block; 501, first accommodation groove; 502, first air cylinder; 6, roller; 7, supporting block; 701, second air cylinder; 702, mounting box; 8, buffer plate; 801, inclined block; 802, telescopic block; 803, third spring; 804, mounting groove; 9, limiting block; 901, limiting groove; 902, second accommodation groove; 903, third air cylinder; 10, warning light. DETAILED DESCRIPTION

[0079] The following description is provided to enable any person skilled in the art to practice the application. The preferred embodiments described below are only examples of the application, and other obvious modifications are possible.

[0080] As Figure 1 shown, a mechanized operation line construction process under the condition of rock burst, comprising the following steps:

[0081] Step one, install a monitoring and early warning platform in the rock burst mine, upload the coal body stress monitoring, microseismic monitoring and drilling data monitoring data to the platform, install a rock burst stress online monitoring system in the rock burst dangerous area divided for the mine, by embedding high-precision stress sensors in the coal body, real-time monitoring the accumulation and change of static load in the near-field system of mining surrounding rock;

[0082] Step two, install a protective device every specified distance in the divided high rock burst dangerous area, the construction section of the two crossheading of the working face is a weak rock burst dangerous area, according to the business contact book issued by the mine, the pressure relief method adopts the side of the mining side and the coal pillar side of the crossheading, sets the pressure relief hole, with the continuous advancement of the excavation face, constantly follow-up pressure relief work, install a protective device in the construction section of the weak rock burst dangerous area, and move the protective device synchronously with the forward movement of the construction section;

[0083] Step 3: Decompression treatment is carried out in the area where bottom coal is left in the tunneling face. Decompression is achieved by drilling decompression holes on the side of the bottom coal pillar. In areas where the bottom coal thickness is ≥10 meters, the borehole length is 10m. In areas where the bottom coal thickness is less than 10m, drilling continues until rock is encountered, with intervals of 3.1-3.3m, perpendicular to the coal face and inclined downwards at 60°. The depth of the decompression hole reaches the bottom of the coal seam, with a hole diameter of Φ153mm. The distance from the face is less than or equal to 30m. At the face, three holes with a diameter of 150-155mm are drilled horizontally, with a hole depth of 50m. When the distance from the tunneling face to the bottom of the decompression hole is less than 10m, the next round of drilling is carried out. This cycle is repeated, and the decompression holes are sealed in time after completion.

[0084] Step 4: When an impact hazard is detected at the tunnel face, the hazard is relieved and pressure is reduced by increasing the number of face boreholes to 5. Other parameters are the same as the pressure relief parameters. When an impact hazard is detected on both sides of the roadway, the danger range is first determined by the drill cuttings method, and then hazard relief measures are taken. The boreholes should be staggered with the previous pressure relief boreholes. If the stress concentration is high, the construction speed of large-diameter boreholes is slow, or the hazard relief effect is not obvious, coal seam blasting or other hazard relief measures should be implemented.

[0085] Step 5: When a rockburst hazard is detected at the working face, and large-diameter boreholes cannot relieve the pressure in time or the pressure relief effect is not obvious, coal blasting can be carried out to relieve the pressure in the coal body on both sides of the roadway in the dangerous area of ​​the working face. The distance from the detonation point to the blasting location shall not be less than 300m, and the time to avoid the blast shall not be less than 30min.

[0086] Step Six: When the aforementioned hazard mitigation work is not effective, blasting hazard mitigation measures shall be taken for the roadway floor. The construction location is the bottom corners of both sides of the roadway, and construction shall proceed outward from the coal face.

[0087] like Figures 2 to 9 The protective device shown is a construction process for a mechanized production line under rock burst conditions. The protective device includes:

[0088] The protective base 101 has an arc-shaped protective top 102 fixed to its top.

[0089] Two sets of second flip frames 203, two second flip frames 203 form a set, the second flip frames 203 in the same set are rotatably connected, and the opposite ends of the second flip frames 203 in the same set are rotatably installed with fixed bases, and the fixed bases are fixedly connected to the protective base 101.

[0090] Two support components are respectively installed below the two sets of second flip frames 203. They are activated in case of danger to push the protective base 101 to both sides when the arc-shaped protective top 102 is under force, and push the arc-shaped protective top 102 to the top when the protective base 101 is under force.

[0091] Under the condition of rock burst, if the effect of the danger relief measures is not ideal, the construction personnel inside the roadway will encounter safety hazards, therefore, while the mechanized operation line construction is carried out, protection measures need to be set in the roadway to provide protection for the construction personnel when the effect of the danger relief measures is not ideal.

[0092] The embodiment of the present application can solve the above problems, and the specific implementation is as follows: after the protective base 101 and the arc-shaped protective top 102 are arranged inside the roadway, when a collapse occurs inside the roadway, the construction personnel who cannot escape can hide inside the protective base 101 and the arc-shaped protective top 102 to wait for rescue, which is beneficial to avoid the safety hazards caused by the falling stones hitting the construction personnel during the collapse;

[0093] When the stones fall, the protective base 101 and the arc-shaped protective top 102 can block the stones, thereby protecting the construction personnel inside, when the arc-shaped protective top 102 is subjected to an external force, the support assembly and the second turnover frame 203 together form a triangular support between the two sides of the arc-shaped protective top 102 and the protective base 101, the external force is distributed and applied between the two side walls of the protective base 101 through the triangular support of the support assembly, thereby forming an external force that pushes the side wall of the protective base 101 from the inside of the protective base 101, which counteracts the external force of the falling stones hitting the protective base 101, and the protective base 101 can be supported by the side wall of the roadway, and the same applies when the side wall of the protective base 101 is subjected to an external force, which also plays a supporting and counteracting role, thereby being beneficial to improve the protection effect of the protective base 101 and the arc-shaped protective top 102, thereby being beneficial to avoid the collapse of the protective base 101 and the arc-shaped protective top 102, and being beneficial to improve the protection effect on the construction personnel.

[0094] As an optional embodiment, the support assembly comprises:

[0095] Two groups of first turnover frames 2, the two first turnover frames 2 are a group, and the first turnover frames 2 in the same group are rotationally connected to each other;

[0096] Two groups of sliding bases 201, the two sliding bases 201 are a group, and the sliding bases 201 in the same group are rotationally installed at opposite ends of the two first turnover frames 2 in the same group;

[0097] Two first sliding grooves 202, which are symmetrically formed on the inner walls of the two sides of the protective base 101, and the sliding bases 201 are slidingly installed in the corresponding first sliding grooves 202;

[0098] Two clamping mechanisms, one of which is installed between the second turnover frame 203 and a first turnover frame 2 above it, and the other of which is installed between the two first turnover frames 2, for connecting the second turnover frame 203 and the two groups of first turnover frames 2 after starting and forming support;

[0099] Two limiting mechanisms are installed on the side walls of the protective base 101 for limiting and supporting the sliding base 201;

[0100] When a collapse hazard occurs inside the roadway, the limiting mechanism releases the limiting action on the sliding base 201, so that the sliding base 201 slides downward along the first sliding groove 202 under the action of gravity, thereby causing the two groups of first turnover frames 2 to slide downward and expand;

[0101] It should be noted that a pushing assembly, such as an electric push rod, can be provided at the sliding base 201, so that after the limiting mechanism releases the limiting action, the electric push rod can drive the sliding base 201 to move downward to drive the two groups of first turnover frames 2 to expand, thereby preventing the sliding base 201 from being difficult to slide downward under the action of gravity due to resistance during the expansion of the first turnover frames 2, and thereby ensuring the smooth expansion of the first turnover frames 2;

[0102] During the expansion of the two groups of first turnover frames 2, the clamping assembly is driven to complete the clamping action on the two groups of first turnover frames 2, so that the first turnover frame 2 above and the second turnover frame 203 maintain the expanded position through the clamping action of the clamping assembly, and the two groups of first turnover frames 2 maintain the expanded position through the clamping action of the clamping assembly. At this time, when the protective base 101 and the arc-shaped protective top 102 are stressed, for example, when the arc-shaped protective top 102 is stressed, the arc-shaped protective top 102 generates a downward force under the action of external force, which is applied to the rotating connection of the first turnover frame 2, and then exerts a force to the sides along the two first turnover frames 2, thereby pushing the protective base 101 on both sides through the first turnover frame 2, thereby exerting an inward force on the protective base 101. When the protective base 101 is externally stressed, the inward force can balance the external stress, and when the protective base 101 is not externally stressed, the protective base 101 can be pressed against the inner wall of the roadway to form support, thereby preventing the protective base 101 and the arc-shaped protective top 102 from collapsing under the action of external force;

[0103] The entire protective base 101 and arc-shaped protective top 102 are independent of the interior of the roadway, so that they do not simultaneously produce safety hazards when cracks occur in the interior of the roadway under the action of impact ground pressure, thereby temporarily protecting the construction personnel.

[0104] As an optional embodiment, the clamping mechanism comprises:

[0105] A vertical limiting frame 3, the top of the vertical limiting frame 3 is fixedly connected with the top of the protective base 101 or the rotating shaft of the upper first turnover frame 2;

[0106] A second sliding groove 301 is arranged in the interior of the vertical limiting frame 3, and the first turnover frame 2 is slidingly connected in the interior of the second sliding groove 301 through a sliding block 303 connected with the rotating shaft;

[0107] A limiting rod 302 is transversely slidingly installed in the interior of the second sliding groove 301, and an arc-shaped groove 305 is arranged in the bottom of the limiting rod 302;

[0108] A first spring 304 is fixed between the upper end of the side wall of the limiting rod 302 and the second sliding groove 301;

[0109] An arc-shaped rod 4 is slidingly inserted into the bottom of the vertical limiting frame 3;

[0110] An arc-shaped pushing shell 401 is sleeved on the end of the arc-shaped rod 4, and a second spring 402 is jointly installed between the arc-shaped rod 4 and the interior of the arc-shaped pushing shell 401, and the bottom of the limiting rod 302 is transversely pushed by the arc-shaped pushing shell 401 after the sliding block 303 slides downward and extrudes the arc-shaped rod 4;

[0111] When the first turnover frame 2 slides downward, the sliding block 303 connected with the rotating shaft of the first turnover frame 2 slides downward along the second sliding groove 301, and after the sliding block 303 slides downward, the first spring 304 pushes the top of the limiting rod 302 to move transversely to the position above the sliding block 303 after losing the extrusion of the sliding block 303, and after the sliding block 303 slides to the bottom of the second sliding groove 301, the sliding block 303 pushes the arc-shaped rod 4 downward, so that the arc-shaped rod 4 slides and pushes the second spring 402, and after the sliding block 303 completely slides to the bottom of the second sliding groove 301, the bottom of the limiting rod 302 loses the extrusion of the sliding block 303, and at this time, the arc-shaped pushing shell 401 is pushed by the elastic force generated by the compression of the second spring 402, so that the arc-shaped pushing shell 401 pushes the bottom of the limiting rod 302, and the bottom of the limiting rod 302 moves transversely, thereby pushing the limiting rod 302 to completely move transversely to the top of the sliding block 303, and the arc-shaped groove 305 at the bottom of the limiting rod 302 is attached to the top of the sliding block 303, thereby completely limiting the sliding block 303, so as to completely limit the first turnover frame 2 after moving downward, so that the vertical limiting frame 3 connected with the arc-shaped protective top 102 can push the sliding block 303 downward after being subjected to the top force, thereby pushing the first turnover frame 2, so that the first turnover frame 2 is stressed, and the first turnover frame 2 can also push the first turnover frame 2 below after being stressed, thereby transmitting the force, and forming a triangular support between the triangular frame formed between the first turnover frame 2 and the vertical limiting frame 3, thereby facilitating the stability of the protective base 101 and the arc-shaped protective top 102.

[0112] As an optional embodiment, the limiting mechanism includes:

[0113] The stop block 5 is slidably installed inside the first clearance groove 501 opened on the side wall of the protective base 101. The stop block 5 has a U-shaped structure. The upper horizontal plate of the stop block 5 provides limiting support for the upper sliding base 201, and the lower horizontal plate of the stop block 5 provides limiting support for the lower sliding base 201.

[0114] The first cylinder 502 is fixed inside the first clearance groove 501. The first cylinder 502 drives the stop block 5 to move through the telescopic rod.

[0115] The two horizontal plates of the stop block 5 can provide limiting support for the two sliding bases 201, thereby maintaining the initial state of the sliding bases 201. After the first cylinder 502 is started, the stop block 5 is moved by the telescopic rod, so that the stop block 5 slides away from the bottom of the sliding base 201 along the first clearance groove 501, thereby causing the sliding base 201 to lose its support and slide downward under the action of gravity, thereby driving the first flipping frame 2 to unfold.

[0116] As an optional embodiment, it also includes:

[0117] Multiple rollers 6 are installed at the bottom of the protective base 101;

[0118] Multiple support blocks 7 are provided, one-to-one with the rollers 6, and are located on the adjacent side of the rollers 6;

[0119] Multiple mounting boxes 702 are fixed inside the protective base 101. Each mounting box 702 has a second cylinder 701 fixed inside. The second cylinder 701 is set one-to-one with the support block 7. The second cylinder 701 is fixedly connected to the corresponding support block 7 through a telescopic rod.

[0120] When the protective base 101 needs to be moved, the second cylinder 701 is activated to drive the support block 7 to move upward, so that the support block 7 no longer supports the protective base 101. At this time, the roller 6 touches the ground, and the force applied to the protective base 101 can push the protective base 101 to move.

[0121] It should be noted that a drive assembly is installed on the roller 6 to drive the roller 6 to rotate. For example, a motor is installed to drive the roller 6 to rotate, so that the roller 6 has an active rotation function and can drive the protective base 101 to move.

[0122] When the protective base 101 does not need to be moved, the second cylinder 701 is activated to drive the support block 7 to move downward, so that the support block 7 supports the protective base 101, thereby preventing the protective base 101 from moving easily.

[0123] As an optional embodiment, it also includes:

[0124] Two buffer plates 8 are respectively rotatably installed in the through openings in the side walls of the protective base 101, and a plurality of limiting grooves 901 are formed in the two sides of the two buffer plates 8.

[0125] Two groups of limiting blocks 9, the two limiting blocks 9 in the same group are respectively slidably inserted into the limiting grooves 901 on the two sides of the buffer plate 8, and the limiting block 9 is slidably installed in the second accommodating groove 902 formed in the side wall of the protective base 101.

[0126] Two groups of third air cylinders 903, the two third air cylinders 903 in the same group are installed in the limiting grooves 901 on the two sides of the buffer plate 8, and the third air cylinder 903 drives the limiting block 9 to move through the telescopic rod.

[0127] When the impact force of the external falling rock on the protective base 101 approaches the bearing limit of the protective base 101, the side wall of the protective base 101 is more likely to be damaged under stress due to its large area. At this time, the third air cylinder 903 is controlled to start, the third air cylinder 903 drives the limiting block 9 to move out of the inside of the limiting groove 901, so that the buffer plate 8 loses the limiting. At this time, the buffer plate 8 is turned over under the action of external force, and the two buffer plates 8 are turned over at the same time and close to each other to form a triangular area. The construction personnel can hide under the triangular area. At this time, the protection area is reduced, and the buffer plate 8 in the form of a triangular support after reduction can improve the protection, thereby being beneficial to improve the protection of the construction personnel.

[0128] As an optional embodiment, it further comprises:

[0129] Two inclined blocks 801 are respectively fixed to the top of the opposite sides of the two buffer plates 8.

[0130] Two telescopic blocks 802 are respectively slidably inserted into the mounting grooves 804 formed in the two inclined blocks 801.

[0131] Two groups of third springs 803, a plurality of third springs 803 in the same group are linearly arranged and fixed between the inside of the two mounting grooves 804 and the telescopic blocks 802.

[0132] When the two buffer plates 8 are close to each other, the two telescopic blocks 802 first collide with each other, and then press the third spring 803, so that the third spring 803 can buffer the collision of the two buffer plates 8, thereby being beneficial to reduce the damage of the collision of the two buffer plates 8, and can buffer the impact force when affected by the falling rock.

[0133] As an optional embodiment, it further comprises:

[0134] A pressure sensor is installed on the top of the arc-shaped protective top 102.

[0135] Warning light 10, installed at both ends of protective base 101;

[0136] When the top of arc-shaped protective roof 102 is affected by falling rocks, the pressure sensor is pressed to generate pressure information, at which time the warning light 10 is started when the pressure sensor detects the pressure information, so that the warning light 10 warns the position of the protective base 101, which is beneficial to the construction personnel to quickly find the protective base 101 to avoid.

[0137] As an optional embodiment, it further comprises:

[0138] Warning bracelet, placed on the body of the worker;

[0139] Distance detector, installed on the warning bracelet, for detecting the distance between the warning bracelet and the protective base 101 adjacent to the two ends of the tunnel;

[0140] Control unit, installed inside the protective base 101, for controlling the distance detector to start detecting the distance between the warning bracelet and the protective base 101 adjacent to the two ends of the tunnel when the pressure sensor is pressed, and comparing the two detection data to select the protective base 101 corresponding to the smaller data, and the control unit is also used to control the warning light 10 to emit the same color warning light as the warning light 10 on the selected protective base 101;

[0141] When the warning light 10 emits a warning, the distance detector detects the distance between the warning bracelet and the protective base 101 adjacent to the two ends of the tunnel, and compares the two detection data to select the protective base 101 corresponding to the smaller distance, and then controls the warning bracelet to emit the same color warning light as the selected protective base 101, so as to prompt the construction personnel to run to the protective base 101 with a short distance to avoid, thereby reducing the decision-making time of the construction personnel and improving the protection;

[0142] It should be noted that the distance detector can be selected as a positioner to position the protective base 101 inside the tunnel to detect the distance, which is prior art and will not be described here.

[0143] The working principle of the present application is that after the protective base 101 and the arc-shaped protective roof 102 are arranged inside the tunnel, when the tunnel collapses, the construction personnel who cannot escape can hide inside the protective base 101 and the arc-shaped protective roof 102 to wait for rescue, which is beneficial to avoid the safety hazard caused by the falling rocks falling on the construction personnel;

[0144] The falling stones can be shielded by the protective base 101 and the arc-shaped protective top 102, so as to protect the internal construction personnel; when the stones fall, the supporting assembly is started, the supporting assembly and the second turnover frame 203 form a triangular support between the two sides of the arc-shaped protective top 102 and the protective base 101, when the arc-shaped protective top 102 is subjected to external force, the triangular support of the supporting assembly is used to distribute the force between the two side walls of the protective base 101, so as to form an action force of pushing the side wall of the protective base 101 outward from the inside of the protective base 101, which is used to offset the action force of the falling stones on the protective base 101, and the protective base 101 can be supported by the side wall of the roadway, and the same is true when the side wall of the protective base 101 is subjected to external force, so as to improve the protection effect of the protective base 101 and the arc-shaped protective top 102, so as to avoid the collapse of the protective base 101 and the arc-shaped protective top 102, and improve the protection effect on the construction personnel.

[0145] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A protective device for a mechanized construction line under rock burst conditions, characterized in that, Protective devices include: A protective base (101) is provided, and an arc-shaped protective top (102) is fixed to the top of the protective base (101). Two sets of second flip frames (203) are provided. Two second flip frames (203) form a set. The second flip frames (203) in the same set are rotatably connected. The opposite ends of the second flip frames (203) in the same set are rotatably mounted with fixed bases. The fixed bases are fixedly connected to the protective base (101). Two support components are respectively installed below the two sets of the second flip frame (203), and are activated in case of danger to push the protective base (101) to both sides when the arc-shaped protective top (102) is under force, and push the arc-shaped protective top (102) to the top when the protective base (101) is under force. The support components include: Two sets of first flipping frames (2), two first flipping frames (2) form a set, and the first flipping frames (2) in the same set are rotatably connected to each other; Two sets of sliding bases (201), the two sliding bases (201) form a set, and the sliding bases (201) in the same set are respectively rotatably installed on the opposite ends of the two first flipping frames (2) in the same set; Two first sliding grooves (202) are symmetrically opened on the inner walls of both sides of the protective base (101), and the sliding base (201) is slidably installed in the corresponding first sliding groove (202); Two positioning mechanisms are provided, one of which is installed between the second flip frame (203) and one of the first flip frames (2) located above, and the other is installed between the two first flip frames (2). The positioning mechanisms are used to connect the second flip frame (203) and the two sets of first flip frames (2) after startup and form a support. Two limiting mechanisms are installed on the side wall of the protective base (101) to limit and support the sliding base (201); The positioning mechanism includes: A vertical limiting frame (3) is fixedly connected at its top to the pivot of the first flip frame (2) at or above the top of the protective base (101). The second slide groove (301) is opened inside the vertical limiting frame (3), and the first flipping frame (2) is slidably connected inside the second slide groove (301) by a slider (303) connected to the rotating shaft; The limiting rod (302) is laterally slidably installed inside the second slide groove (301), and the bottom of the limiting rod (302) is provided with an arc groove (305). The first spring (304) is fixed between the upper end of the side wall of the limiting rod (302) and the second slide groove (301); An arc-shaped rod (4) is slidably inserted into the bottom of the vertical limiting frame (3); An arc-shaped push shell (401) is sleeved on the end of the arc-shaped rod (4). A second spring (402) is installed between the arc-shaped rod (4) and the interior of the arc-shaped push shell (401). After the slider (303) slides down and squeezes the arc-shaped rod (4), it drives the arc-shaped push shell (401) to push the bottom of the limiting rod (302) laterally.

2. The protective device for a mechanized construction line under rock burst conditions according to claim 1, characterized in that, The limiting mechanism includes: The stop block (5) is slidably installed inside the first clearance groove (501) opened on the side wall of the protective base (101). The stop block (5) has a U-shaped structure. The upper horizontal plate of the stop block (5) provides limiting support for the upper sliding base (201), and the lower horizontal plate of the stop block (5) provides limiting support for the lower sliding base (201). The first cylinder (502) is fixed inside the first clearance groove (501), and the first cylinder (502) drives the stop (5) to move through the telescopic rod.

3. The protective device for a mechanized construction line under rock burst conditions according to claim 1, characterized in that, Also includes: Multiple rollers (6) are installed at the bottom of the protective base (101); Multiple support blocks (7) are provided one-to-one with the rollers (6) and are located on the adjacent side of the rollers (6); Multiple mounting boxes (702) are fixed inside the protective base (101). Each mounting box (702) has a second cylinder (701) fixed inside it. The second cylinder (701) is set in a one-to-one correspondence with the support block (7). The second cylinder (701) is fixedly connected to the corresponding support block (7) through a telescopic rod.

4. The protective device for a mechanized construction line under rock burst conditions according to claim 1, characterized in that, Also includes: Two buffer plates (8) are respectively installed inside the openings on both sides of the protective base (101) by rotating at the bottom. Multiple limiting grooves (901) are provided on both sides of the two buffer plates (8). Two sets of limiting blocks (9), the two limiting blocks (9) are a set, the two limiting blocks (9) in the same set are slidably inserted into the limiting grooves (901) on both sides of the buffer plate (8), and the limiting blocks (9) are slidably installed in the second clearance groove (902) opened on the side wall of the protective base (101); Two sets of third cylinders (903) are used as a group. The three cylinders (903) in the same group are installed inside the limiting grooves (901) located on both sides of the buffer plate (8). The three cylinders (903) drive the limiting block (9) to move through the telescopic rod.

5. The protective device for a mechanized construction line under rock burst conditions according to claim 4, characterized in that, Also includes: Two inclined blocks (801) are fixed to the top of opposite sides of the two buffer plates (8), respectively; Two telescopic blocks (802) are slidably inserted into the mounting slots (804) opened inside the two inclined blocks (801); Two sets of third springs (803), a number of the third springs (803) form a group, and the two sets of third springs (803) are fixed in a linear array between the two mounting slots (804) and the telescopic block (802).

6. The protective device for a mechanized construction line under rock burst conditions according to claim 1, characterized in that, Also includes: A pressure sensor is installed on the top of the arc-shaped protective top (102); Warning lights (10) are installed at both ends of the protective base (101).

7. The protective device for a mechanized construction line under rock burst conditions according to claim 6, characterized in that, Also includes: Warning wristbands are placed on staff members; A distance detector is installed on the warning wristband and is used to detect the distance between the warning wristband and the protective base (101) adjacent to both ends of the roadway; The control unit, installed inside the protective base (101), is used to control the distance detector to start when the pressure sensor is pressed, detect the distance between the warning wristband and the adjacent protective bases (101) at both ends of the roadway, and select the protective base (101) corresponding to the smaller data after comparing the two detection data. The control unit is also used to control the warning light (10) to emit a warning light of the same color as the warning light (10) on the selected protective base (101).

8. A construction process for a mechanized production line under rock burst conditions, adapted for use with a protective device for the mechanized production line construction process under rock burst conditions as described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Install a monitoring and early warning platform in the rockburst mine to upload data on coal stress monitoring, microseismic monitoring, and drill cuttings data monitoring to the platform. For the rockburst hazard areas in the mine, an online rockburst stress monitoring system can be installed. By embedding high-precision stress sensors in the coal body, the accumulation and changes of static load in the near-field system of the mining surrounding rock can be monitored in real time. Step 2: Install protective devices at designated intervals in the high-impact hazard areas. The two roadway construction sections of the working face are low-impact hazard areas. According to the business liaison letter issued by the mine, the pressure relief method is to drill pressure relief holes on the mining side and coal pillar side of the roadway side. As the tunneling face advances, pressure relief work is continuously carried out. Protective devices are installed in the construction sections of the low-impact hazard areas and moved synchronously with the advance of the construction sections. Step 3: Decompression treatment is carried out in the area where bottom coal is left in the tunneling face. Decompression is achieved by drilling decompression holes on the side of the bottom coal pillar. In areas where the bottom coal thickness is ≥10 meters, the borehole length is 10m. In areas where the bottom coal thickness is less than 10m, drilling continues until rock is encountered, with intervals of 3.1-3.3m, perpendicular to the coal face and inclined downwards at 60°. The depth of the decompression hole reaches the bottom of the coal seam, with a hole diameter of Φ153mm. The distance from the face is less than or equal to 30m. At the face, three holes with a diameter of 150-155mm are drilled horizontally, with a hole depth of 50m. When the distance from the tunneling face to the bottom of the decompression hole is less than 10m, the next round of drilling is carried out. This cycle is repeated, and the decompression holes are sealed in time after completion. Step 4: When an impact hazard is detected at the tunnel face, the hazard is relieved and pressure is reduced by increasing the number of face boreholes to 5. Other parameters are the same as the pressure relief parameters. When an impact hazard is detected on both sides of the roadway, the danger range is first determined by the drill cuttings method, and then hazard relief measures are taken. The boreholes should be staggered with the previous pressure relief boreholes. If the stress concentration is high, the construction speed of large-diameter boreholes is slow, or the hazard relief effect is not obvious, coal seam blasting or other hazard relief measures should be implemented. Step 5: When a rockburst hazard is detected at the working face, and large-diameter boreholes cannot relieve the pressure in time or the pressure relief effect is not obvious, coal blasting can be carried out to relieve the pressure in the coal body on both sides of the roadway in the dangerous area of ​​the working face. The distance from the detonation point to the blasting location shall not be less than 300m, and the time to avoid the blast shall not be less than 30min. Step Six: When the aforementioned hazard mitigation work is not effective, blasting hazard mitigation measures shall be taken for the roadway floor. The construction location is the bottom corners of both sides of the roadway, and construction shall proceed outward from the coal face.

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