A grouting device and a mining method for green mining of a jurassic coalfield

Abstract

The present application relates to the technical field of Jurassic coalfield, and discloses a kind of green exploitation grouting device and exploitation method of Jurassic coalfield, comprising the following steps: S1: the development height of water-conducting fracture zone is inquired;S2: the influence range of water-conducting fracture zone is inquired;S3: the purpose aquifer of main prevention and cure is determined;S4: the grouting target is determined;S5: the grouting target determined in S4 is grouted by drilling and feeding rod drilling+grouting method;S6: the effect of green exploitation is tested.Drilling is carried out on the monitoring area by drill rod, a feeding rod is inserted into the inside of the drill rod, the feeding rod reaches the sealing head, when the inside hole of the feeding rod inserted into the sealing head is opened, and then cement is injected along the channel, so that the high-angle fracture can be grouted and plugged, the workload of green exploitation treatment is reduced, the cost of mine water prevention and control is reduced, and the benefit is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of Jurassic coalfield, in particular to a green mining grouting device and method for Jurassic coalfield. BACKGROUND

[0002] The Jurassic coalfield is formed in the Jurassic geological period about 200 million to 145 million years ago, is an important coal resource enrichment layer system in the world, and has the typical characteristics of simple coal seam structure, shallow burial, widely developed low-ash, low-sulfur, high-volatile long-flame coal and non-caking coal, stable calorific value and easy washing and selection, is the main source of high-quality power coal and chemical coal, and often faces problems such as poor stability of coal seam roof and floor, complex hydrogeological conditions in mining practice, but through modern exploration technology and green mining technology, such coalfield still provides an important guarantee for energy supply, and is of great significance to regional economic development.

[0003] The related roof water control method for Jurassic coalfield adopts regional curtain grouting, but this method has large engineering quantity, serious material waste and wide disturbance range, especially lacks targeted measures for high-angle crack precise plugging, thereby causing high mine water prevention and control cost, low efficiency and inability to precisely fill high-angle cracks. SUMMARY

[0004] In view of the defects of the prior art, the present application provides a green mining grouting device and method for Jurassic coalfield, which solves the problems of high mine water prevention and control cost, low efficiency and inability to precisely fill high-angle cracks caused by the related roof water control method for Jurassic coalfield using regional curtain grouting.

[0005] To achieve the above purpose, the present application realizes the following technical scheme: a green mining grouting device for Jurassic coalfield, comprising a drill rod and a material conveying rod, a sealing head is fixedly connected to the outside of the drill rod, a fixed ring is arranged in the inside of the drill rod, a hollow block is fixedly connected to the inside of the drill rod, an extrusion assembly is arranged in the inside of the hollow block, the extrusion assembly is connected with the material conveying rod, a gas guide rod is fixedly connected to the inside of the fixed ring, a reset spring one is arranged in the inside of the hollow block, the reset spring one is connected with the extrusion assembly, the material conveying rod is arranged in the inside of the sealing head, a limiting assembly is arranged in the inside of the drill rod, and a one-way valve is installed in the inside of the material conveying rod.

[0006] By adopting the technical scheme, the development height of the water flowing fractured zone of the mining face is monitored in real time by the optical fiber detector arranged in the drill rod, and the horizontal influence range thereof is determined in combination with the stratum movement angle; when it is determined that the high-angle water flowing fracture exists, the material feeding rod equipped with the one-way valve is inserted into the drill rod; when the material feeding rod reaches the high-elastic rubber sealing head at the end of the drill rod, the self-closing hole at the bottom of the sealing head is opened to form a grouting channel; at this time, the material feeding rod synchronously triggers the extrusion assembly, and the compressed air is injected into the multiple sets of fixed rings on the outer wall of the drill rod through the air guide pipe, so that the fixed rings are expanded to adhere to the irregular borehole wall; then, the cement grouting is implemented through the established channel to accurately seal the high-angle fracture; after the grouting is completed, the material feeding rod is withdrawn, the extrusion assembly is reset to release the air, and the fixed rings are contracted back to the inside of the drill rod; the integrated system realizes accurate fracture detection and directional sealing, reduces the workload of green treatment, saves the cost of mine water prevention and control, significantly improves the grouting stability through the dynamically expanded fixed ring structure, and avoids unnecessary wear of the fixed ring during drilling.

[0007] Preferably, the extrusion assembly comprises a connecting rod, an outer portion of the connecting rod is slidingly connected to an inner portion of the hollow block, one end of the connecting rod is fixedly connected with a transmission block, the other end of the connecting rod is fixedly connected with a pressing block, and one end of the reset spring I is arranged in the inner portion of the transmission block.

[0008] Preferably, an outer portion of the pressing block is slidingly connected to an inner portion of the hollow block, and an outer portion of the transmission block is arranged on an outer portion of the material feeding rod.

[0009] Preferably, the limiting assembly comprises a limiting block I, an outer portion of the limiting block I is fixedly connected to an inner portion of the drill rod, and an outer portion of the material feeding rod is fixedly connected with a limiting block II.

[0010] Preferably, an outer portion of the material feeding rod is fixedly connected with a rotating block I, an outer portion of the rotating block I is fixedly connected with a magnetic attraction block I, an inner portion of the drill rod is provided with an opening and closing assembly, an inner portion of the drill rod is fixedly connected with a positioning block, and the positioning block is connected with the opening and closing assembly.

[0011] Preferably, the inner portion of the drill rod is provided with a water inlet, the inner portion of the drill rod is provided with a limiting groove, the limiting groove is connected with the opening and closing assembly, and the water inlet is connected with the opening and closing assembly.

[0012] Preferably, the opening and closing assembly comprises a stop block, an outer portion of the stop block is slidingly connected to an inner portion of the drill rod, an outer portion of the stop block is fixedly connected with a rotating block II, an outer portion of the rotating block II is fixedly connected with a magnetic attraction block II, an inner portion of the rotating block II is provided with a reset spring II, and an outer portion of the reset spring II is arranged in the inner portion of the drill rod.

[0013] Preferably, an outer portion of the stop block is slidingly connected to an inner portion of the limiting groove, and an outer portion of the stop block is arranged on an outer portion of the positioning block.

[0014] Preferably, a green mining method of Jurassic coalfield includes the following steps:

[0015] S1: The development height of the water flowing fractured zone is explored, and the exploration method includes but is not limited to drilling, geophysical prospecting and optical fiber monitoring;

[0016] S2: The influence range of the water flowing fractured zone is explored, the development height of the water flowing fractured zone is determined through S1, and the influence range of the water flowing fractured zone is determined in combination with the strata movement angle monitored by the mine;

[0017] S3: The main prevention and control purpose aquifer is determined, the water abundance, water level and water pressure of the aquifer in the influence range of the water flowing fractured zone are explored, and the aquifer with a unit water inflow q>0.01 L / is taken as the purpose aquifer;

[0018] S4: The grouting treatment target is determined, the influence range of the water flowing fractured zone determined in S1 is taken as the target range, the development characteristics of the vertical high-angle fissure in the range are explored, the vertical high-angle fissure affecting the purpose aquifer determined in S2 is determined, and it is taken as the green mining treatment target;

[0019] S5: The treatment target determined in S4 is treated by drilling and grouting through the drill rod and the material conveying rod, wherein the drill hole is a straight hole or a directional hole, the main material of the slurry is cement, the water-cement ratio is 1:1-1:1.5, and the grouting pressure is not greater than twice the water pressure of the purpose aquifer determined in S3;

[0020] S6: The effect of green mining is tested, that is, the water in the aquifer is introduced into the drill rod and the material conveying rod through 16 for detection.

[0021] Preferably, in S6, the water in the aquifer is introduced into the drill rod and the material conveying rod through 16 for detection.

[0022] Working principle: The monitoring area is drilled through the drill rod, wherein the sealing head detects the development height of the water flowing fractured zone of the mining working face in real time, and determines whether the water flowing fractured zone is a high-angle fissure in combination with the strata movement angle, if it is a high-angle fissure, the material conveying rod is inserted into the inside of the drill rod, the material conveying rod reaches the sealing head, when the inside hole of the material conveying rod inserted into the sealing head is expanded, and then the cement is injected along the channel, at this time the high-angle fissure is blocked, so that the grouting and blocking of the high-angle fissure can be achieved, the workload of green mining treatment is reduced, the water prevention and control cost of the mine is reduced, and the effect of increasing benefit is achieved;

[0023] In the process of inserting the feeding rod, the feeding rod extrudes the transmission block to move, then the connecting rod slides under the drive of the transmission block, and at the same time, the reset spring one is elastically deformed under the drive of the transmission block, at this time, the pressing block slides under the drive of the connecting rod, the pressing block extrudes the air inside the hollow block and inputs the hollow hole of the air guide rod, then the air enters the inside of the fixed ring to make the fixed ring expand and contact with the drill hole, when the feeding rod is taken out from the inside of the drill rod after the grouting is finished, the air is separated from the inside of the fixed ring, and the fixed ring resets and shrinks to the inside of the drill rod, so that the grouting stability can be improved, and the fixed ring can be prevented from being excessively worn during drilling.

[0024] By rotating the feeding rod to drive the rotating block one to rotate, then the magnetic attraction block one rotates under the drive of the rotating block one, and then the magnetic attraction block one and the magnetic attraction block two are attached and synchronously rotated, at this time, the rotating block two rotates under the drive of the magnetic attraction block two, at this time, the stop block slides under the drive of the rotating block two, and then the stop block no longer shields the water inlet, and the feeding rod is provided with an inductor on the surface side to collect the water inflow of the water-bearing layer after grouting in real time, when stable data is collected, the feeding rod is reversely rotated to reset, then the feeding rod is pulled out, and the test water sample flushes the inner wall of the drill rod under the action of gravity and is discharged from the sealing head, so that the composite functions of grouting, sampling and cleaning can be realized by a single device, and the time for deploying redundant equipment for sampling and detection can be saved.

[0025] The present application provides a kind of Jurassic coalfield green exploitation grouting device and exploitation method.There is the following beneficial effect:

[0026] 1, the present application is drilled to monitoring area by drill rod, inserts feeding rod to the inside of drill rod, feeding rod reaches sealing head, when the inside hole of feeding rod inserted sealing head is opened, then cement is injected along the channel, at this time, high-angle fissure is blocked, so that the effect of grouting and blocking for high-angle fissure can be achieved, the workload of green exploitation treatment is reduced, the cost of mine water prevention and control is reduced, and the benefit is increased.

[0027] 2, in the process of inserting the feeding rod, the feeding rod extrudes the transmission block to move, then the connecting rod slides under the drive of the transmission block, and at the same time, the reset spring one is elastically deformed under the drive of the transmission block, at this time, the pressing block slides under the drive of the connecting rod, the pressing block extrudes the air inside the hollow block and inputs the hollow hole of the air guide rod, so that the effect of improving grouting stability and avoiding excessive wear of the fixed ring during drilling can be achieved.

[0028] 3、The present application can achieve the composite functions of grouting, sampling testing and cleaning through a single device, and save the time of deploying redundant equipment for sampling detection. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A perspective structural schematic view of a green exploitation grouting device for Jurassic coalfield is provided in the present application;

[0030] Figure 2 A drill rod internal structure schematic view of a green exploitation grouting device for Jurassic coalfield is provided in the present application;

[0031] Figure 3 A fixed ring local structure schematic view of a green exploitation grouting device for Jurassic coalfield is provided in the present application;

[0032] Figure 4 A hollow block local structure schematic view of a green exploitation grouting device for Jurassic coalfield is provided in the present application;

[0033] Figure 5 A feed rod internal structure schematic view of a green exploitation grouting device for Jurassic coalfield is provided in the present application;

[0034] Figure 6 A rotating block one local structure schematic view of a green exploitation grouting device for Jurassic coalfield is provided in the present application;

[0035] Figure 7 A flowchart schematic view of a green exploitation method for Jurassic coalfield is provided in the present application.

[0036] 1, drill rod;2, feed rod;3, sealing head;4, fixed ring;5, extrusion assembly;51, transmission block;52, connecting rod;53, pressing block;6, hollow block;7, reset spring one;8, gas guide rod;9, limiting assembly;91, limiting block one;92, limiting block two;10, rotating block one;11, magnetic block one;12, one-way valve;13, positioning block;14, opening and closing assembly;141, stop block;142, rotating block two;143, magnetic block two;144, reset spring two;15, limiting groove;16, water inlet. DETAILED DESCRIPTION

[0037] The technical solutions of the present application will be described clearly and completely below in combination with the drawings of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.

[0038] Please refer to the drawings of the present application Figure 1 , the drawings of the present application Figure 2 and the drawings of the present application Figure 5 , the present application provides a kind of green exploitation grouting device of Jurassic coalfield, including drill rod 1 and material conveying rod 2, the outside of drill rod 1 is fixedly connected with sealing head 3, the inside of drill rod 1 is provided with fixed ring 4, the inside of drill rod 1 is fixedly connected with hollow block 6, the inside of hollow block 6 is provided with extrusion assembly 5, extrusion assembly 5 is connected with material conveying rod 2, the inside of hollow block 6 is fixedly connected with air guide rod 8, one end of air guide rod 8 is fixedly connected in the inside of fixed ring 4, the inside of hollow block 6 is provided with reset spring one 7, reset spring one 7 is connected with extrusion assembly 5, the outside of material conveying rod 2 is arranged in the inside of sealing head 3, the inside of drill rod 1 is provided with limiting assembly 9, the inside of material conveying rod 2 is installed with one-way valve 12.

[0039] Specifically, the monitoring area is drilled by drill rod 1, wherein the inside of sealing head 3 is installed with optical fiber detector to detect the development height of water flowing fractured zone of mining working face in real time, combined with rock stratum movement angle, the influence range of water flowing fractured zone in horizontal direction is determined, that is, whether water flowing fractured zone is high-angle fracture, if it is determined as high-angle, material conveying rod 2 is inserted into the inside of drill rod 1, material conveying rod 2 reaches sealing head 3, and sealing head 3 is composed of high-elasticity rubber, is hollow in shape and has a hole in the lower side to facilitate subsequent grouting, the hole remains closed when sealing head 3 is not inserted into material conveying rod 2, the inside hole of sealing head 3 is expanded when material conveying rod 2 is inserted, thereby forming a grouting channel, and then cement is injected along the channel, at this time, the high-angle fracture is blocked, and the inside of material conveying rod 2 is installed with one-way valve 12 to ensure that the cement can flow in one direction and not backflow, wherein drill rod 1, one-way valve 12 and optical fiber detector are prior art, and will not be described too much here, so that the high-angle fracture can be grouted and blocked, the workload of green exploitation treatment is reduced, the water prevention and control cost of mine water prevention and control work is reduced, and the effect of increasing benefits is achieved; in the process of inserting material conveying rod 2, material conveying rod 2 contacts extrusion assembly 5, and then extrusion assembly 5 extrudes the air in the inside of hollow block 6 and injects it into the inside of fixed ring 4 through air guide rod 8, at this time, the volume of fixed ring 4 expands and then seamlessly fits the irregular borehole, when grouting is completed, material conveying rod 2 is taken out from the inside of drill rod 1, extrusion assembly 5 resets and then the air is extracted from the inside of fixed ring 4, fixed ring 4 resets and retracts into the inside of drill rod 1, through the cooperation of multiple fixed rings 4, the stability of grouting can be improved, and the effect of avoiding excessive wear of fixed ring 4 during drilling is achieved.

[0040] Referring to the drawings Figure 2 - attached Figure 4 The extrusion assembly 5 comprises a connecting rod 52, the outer part of the connecting rod 52 is slidingly connected in the inner part of the hollow block 6, one end of the connecting rod 52 is fixedly connected with a transmission block 51, the other end of the connecting rod 52 is fixedly connected with a pressing block 53, one end of the reset spring 7 is arranged in the inner part of the transmission block 51; the outer part of the pressing block 53 is slidingly connected in the inner part of the hollow block 6, the outer part of the transmission block 51 is arranged outside the outer part of the material conveying rod 2.

[0041] Specifically, the material conveying rod 2 extrudes the transmission block 51 to make the transmission block 51 move, since the connecting rod 52 is fixedly connected with the transmission block 51, the connecting rod 52 slides along the inner part of the hollow block 6 under the driving of the transmission block 51, at the same time, the reset spring 7 is elastically deformed under the driving of the transmission block 51, since the connecting rod 52 is fixedly connected with the pressing block 53, the pressing block 53 slides along the inner part of the hollow block 6 under the driving of the connecting rod 52, the pressing block 53 extrudes the air in the inner part of the hollow block 6 and inputs the hollow hole of the air guide rod 8, then the air enters the inner part of the fixed ring 4 to make the fixed ring 4 expand and contact the drill hole.

[0042] Referring to the drawings Figure 2 The limiting assembly 9 comprises a limiting block one 91, the outer part of the limiting block one 91 is fixedly connected in the inner part of the drill rod 1, the outer part of the material conveying rod 2 is fixedly connected with a limiting block two 92.

[0043] Specifically, the material conveying rod 2 is aligned and inserted into the inner part of the drill rod 1, the material conveying rod 2 drives the limiting block two 92 to synchronously displace, when the limiting block two 92 reaches the limiting block one 91, the material conveying rod 2 is fixed at a specified height, thereby avoiding the material conveying rod 2 from separating from the inner part of the sealing head 3 and sliding into the drill hole.

[0044] Referring to the drawings Figure 5 and attached Figure 6 The outer part of the material conveying rod 2 is fixedly connected with a rotating block one 10, the outer part of the rotating block one 10 is fixedly connected with a magnetic attraction block one 11, the inner part of the drill rod 1 is provided with an opening and closing assembly 14, the inner part of the drill rod 1 is fixedly connected with a positioning block 13, the positioning block 13 is connected with the opening and closing assembly 14, the inner part of the drill rod 1 is provided with a water inlet 16, the inner part of the drill rod 1 is provided with a limiting recess 15, the limiting recess 15 is connected with the opening and closing assembly 14, the water inlet 16 is connected with the opening and closing assembly 14.

[0045] Specifically, the feeding rod 2 is driven to rotate synchronously with the rotating block one 10 by the cooperation of the clamping device and the rotating device, the magnetic block one 11 is fixedly connected with the rotating block one 10, then the magnetic block one 11 is driven to rotate synchronously by the rotating block one 10, then the magnetic block one 11 contacts with the opening and closing assembly 14 and drives the opening and closing assembly 14 to rotate along the limiting groove 15, at this time, the opening and closing assembly 14 no longer shields the water inlet 16, and the target water-bearing layer outside the drill rod 1 is supplied with water through the water inlet 16 to the cavity between the drill rod 1 and the feeding rod 2, and the feeding rod 2 is provided with an inductor on the surface to collect the water inflow of the water-bearing layer after grouting in real time, when the stable data is collected, the feeding rod 2 is reversed to reset, and the opening and closing assembly 14 is reset synchronously, then the feeding rod 2 is pulled out, the water sample under the action of gravity falls along the inner wall of the drill rod 1 to the sealing head 3, the hole of the sealing head 3 is opened under the action of gravity of the water sample, and the grouting residue in the drill rod 1 is flushed out of the inside of the drill rod 1 by the water sample, wherein the clamping device, the rotating device and the inductor are prior art, and will not be described too much here, so that the composite functions of grouting, sampling and cleaning can be realized by a single device, and the time for sampling and detecting by deploying redundant equipment can be saved.

[0046] Referring to the accompanying drawings Figure 5 The opening and closing assembly 14 comprises a stop block 141, the stop block 141 is slidably connected to the inside of the drill rod 1, the stop block 141 is fixedly connected with a rotating block two 142, the rotating block two 142 is fixedly connected with a magnetic block two 143, the rotating block two 142 is provided with a reset spring two 144 in the inside, and the reset spring two 144 is arranged in the inside of the drill rod 1.

[0047] Specifically, the magnetic block two 143 and the magnetic block one 11 both have magnetism, when the magnetic block one 11 rotates to the magnetic block two 143, the magnetic block one 11 is attached to the magnetic block two 143 and rotates synchronously, at this time, the rotating block two 142 is driven to rotate by the magnetic block two 143, the stop block 141 is driven to slide along the limiting groove 15 by the rotating block two 142 due to the fixed connection between the rotating block two 142 and the stop block 141, and the stop block 141 no longer shields the water inlet 16, and the reset spring two 144 is elastically deformed by the rotating block two 142, wherein the reset spring two 144 is used to drive the rotating block two 142 to reset and drive the stop block 141 to reset, and the positioning block 13 is used to limit the position of the stop block 141.

[0048] Referring to the accompanying drawings Figure 1 The accompanying drawings Figure 7 A green mining method of a Jurassic coalfield, characterized in that the method comprises the following steps:

[0049] S1: probe the development height of the water-conducting fracture zone, the probing methods include but are not limited to drilling, geophysical prospecting and optical fiber monitoring;

[0050] S2: probe the influence range of the water-conducting fracture zone, the development height of the water-conducting fracture zone is determined by S1, and the strata movement angle monitored by the mine is combined to determine the influence range of the water-conducting fracture zone;

[0051] S3: determine the main prevention and control purpose aquifer, probe the water abundance, water level and water pressure of the aquifer in the influence range of the water-conducting fracture zone, and take the aquifer with a unit water inflow q>0.01 L / s·m as the purpose aquifer;

[0052] S4: determine the grouting treatment target, take the influence range of the water-conducting fracture zone determined by S1 as the target range, probe the development characteristics of the vertical high-angle fractures in the range, determine the vertical high-angle fractures that affect the purpose aquifer determined by S2, and take them as the green mining treatment target;

[0053] S5: adopt and use the drilling+grouting method through the drill rod 1 and the material conveying rod 2 for the treatment target determined by S4, wherein the drilling is a straight hole or a directional hole, the main material of the slurry is cement, the water-cement ratio is 1:1-1:1.5, and the grouting pressure is not greater than twice the water pressure of the purpose aquifer determined by S3;

[0054] S6: test the effect of green mining, that is, carry out a pumping test on the aquifer.

[0055] In S6, the water in the aquifer is introduced into the drill rod 1 and the material conveying rod 2 through 16 by opening and closing 141 for detection.

[0056] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A green mining grouting device for Jurassic coalfield, characterized in that, The utility model provides a kind of green exploitation grouting device for jurassic coalfield, including drill rod (1) and feed rod (2), the outside of the drill rod (1) is fixedly connected with sealing head (3), the inside of the drill rod (1) is provided with fixed ring (4), the inside of the drill rod (1) is fixedly connected with hollow block (6), the inside of the hollow block (6) is provided with extrusion component (5), the extrusion component (5) is connected with feed rod (2), the inside of the hollow block (6) is fixedly connected with air guide rod (8), one end of the air guide rod (8) is fixedly connected in the inside of fixed ring (4), the inside of the hollow block (6) is provided with reset spring one (7), the reset spring one (7) is connected with extrusion component (5), the outside of the feed rod (2) is arranged in the inside of sealing head (3), the inside of the drill rod (1) is provided with limiting component (9), the inside of the feed rod (2) is mounted with one-way valve (12), the extrusion component (5) includes connecting rod (52), the outside of the connecting rod (52) is slidably connected in the inside of hollow block (6), one end of the connecting rod (52) is fixedly connected with transmission block (51), the other end of the connecting rod (52) is fixedly connected with pressing block (53), one end of the reset spring one (7) is arranged in the inside of transmission block (51), the limiting component (9) includes limit block one (91), the outside of the limit block one (91) is fixedly connected in the inside of drill rod (1), the outside of the feed rod (2) is fixedly connected with limit block two (92), the outside of the feed rod (2) is fixedly connected with rotating block one (10), the outside of the rotating block one (10) is fixedly connected with magnetic attraction block one (11), the inside of the drill rod (1) is provided with opening and closing component (14), the inside of the drill rod (1) is fixedly connected with locating block (13), the locating block (13) is connected with opening and closing component (14), the opening and closing component (14) includes stopper (141), the outside of the stopper (141) is slidably connected in the inside of drill rod (1), the outside of the stopper (141) is fixedly connected with rotating block two (142), the outside of the rotating block two (142) is fixedly connected with magnetic attraction block two (143), the inside of the rotating block two (142) is provided with reset spring two (144), the outside of the reset spring two (144) is arranged in the inside of drill rod (1).

2. The green mining grouting device for Jurassic coalfield according to claim 1, characterized in that, The outside of the pressing block (53) is slidably connected in the inside of the hollow block (6), the outside of the transmission block (51) is arranged in the outside of the feed rod (2).

3. The green mining grouting device for Jurassic coalfield according to claim 1, characterized in that, The inside of the drill rod (1) is provided with water inlet (16), the inside of the drill rod (1) is provided with limiting recess (15), the limiting recess (15) is connected with opening and closing component (14), the water inlet (16) is connected with opening and closing component (14).

4. The green mining grouting device for Jurassic coalfield according to claim 1, characterized in that, The outside of the stopper (141) is slidably connected in the inside of limiting recess (15), the outside of the stopper (141) is arranged in the outside of locating block (13).

5. A method for mining green color of the Jurassic coalfield, characterized by, A kind of green exploitation grouting device for jurassic coalfield for any one of claims 1-4, comprising the following steps: S1: The development height of the water-conducting fracture zone is probed, and the probing methods include but are not limited to drilling, geophysical prospecting and optical fiber monitoring; S2: The influence range of the water-conducting fracture zone is probed, the development height of the water-conducting fracture zone is determined through S1, and the strata movement angle monitored by the mine is combined to determine the influence range of the water-conducting fracture zone; S3: The main prevention and control target aquifer is determined, the water abundance, water level and water pressure of the aquifer in the influence range of the water-conducting fracture zone are probed, and the aquifer with a unit water inflow q>0.01 L / (s·m) is taken as the target aquifer; S4: The grouting treatment target is determined, the influence range of the water-conducting fracture zone determined through S1 is taken as the target range, the development characteristics of the vertical high-angle fractures in the range are probed, the vertical high-angle fractures affecting the target aquifer determined through S2 are determined, and the vertical high-angle fractures are taken as the green mining treatment target; S5: The treatment target determined through S4 is treated by drilling and grouting through the drill rod (1) and the material conveying rod (2), wherein the drill hole is a straight hole or a directional hole, the main material of the slurry is cement, the water-cement ratio is 1:1-1:1.5, and the grouting pressure is not greater than twice the water pressure of the target aquifer determined through S3; S6: The effect of green mining is tested, that is, the water in the aquifer is introduced into the drill rod (1) and the material conveying rod (2) through the opening and closing 141 for detection.

6. The method for exploiting green Jurassic coalfields according to claim 5, characterized in that, In S6, the water in the aquifer is introduced into the drill rod (1) and the material conveying rod (2) through 16 for detection.

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