Coal mine water-preserved mining grouting filling equipment

Abstract

The present application provides a kind of coal mine water-preserved exploitation grouting filling equipment, it relates to mining equipment technical field, the grouting filling equipment includes base frame piece, grouting pipe piece, slurry post-processing assembly and plug drive assembly.The outer wall of grouting pipe piece is equipped with the outer ring of multiple groups of hole wall pressure sensor, and the outlet of slurry is configured with pipe end micro sensor;Plug drive assembly is driven by motor to push outer ring by driving assembly, and the plug of grouting pipe piece is controlled.Working, pipe piece is inserted into grouting hole to go to mined-out area, sensor real-time monitoring rock mass pressure, temperature and acoustic signal, grouting pressure is dynamically adjusted in combination with formation resistance, to avoid slurry channeling or filling deficiency.The present application is accurately controlled by pressure and automatically plugged, solves the problems of material waste, groundwater pollution and insufficient filling in traditional grouting in mined-out area, significantly improves the environmental protection and engineering efficiency of water-preserved exploitation.

Description

Technical Field

[0001] The invention relates to the technical field of mining equipment, in particular to a grouting and filling device for water-retaining mining in coal mines. Background Art

[0002] Water-preserving mining grouting technology is a technology used for waterproofing, water blocking and reinforcing surrounding rocks in coal mining. It reduces the damage of coal mining activities to aquifers through grouting reinforcement, thereby maintaining the integrity and function of the groundwater system. It utilizes the delamination space formed by the different deflections of the overlying soft and hard rock layers after coal seam mining, and injects a large amount of fly ash, coal gangue and other slurries into the delamination through construction drilling to form a composite supporting and bearing structure of "delamination area filling body + key layer + coal pillar", controlling the key layer and above strata from breaking, thereby reducing mining ground subsidence, reducing water resource loss, enhancing the stability of the goaf, reducing the risk of ground subsidence and collapse, and reducing the geological disasters caused by it.

[0003] Existing grouting technologies often use fixed-pressure pumping to deliver slurry. This can lead to excessive pressure, causing slurry to leak into fissures and contaminate water sources, or insufficient pressure to cover distant goafs. Furthermore, grouting tubes often rely on top-pressure application and upward pull to insert into the grouting hole, resulting in a relatively large pressurization and extraction device. While some devices have attempted to integrate sensor monitoring, they lack dynamic feedback mechanisms for rock mass contraction pressure and slurry front resistance, making it impossible to precisely adjust grouting parameters. Summary of the Invention

[0004] The purpose of the present invention is to provide a grouting and filling device for water-retaining mining in coal mines, so as to solve the technical problems raised in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A grouting filling device for water conservation mining in a coal mine comprises a base frame, a grouting conduit and a slurry post-processing assembly connected to an external slurry storage device; a slurry guide hose is connected to the top side wall of the grouting conduit, and the slurry guide hose is connected to a grouting pump arranged on the side wall of the slurry post-processing assembly near the bottom; a plurality of outer ring parts are arranged on the outer wall of the grouting conduit, and each outer ring part has a hole wall pressure sensor on the circumferential surface for sensing the pressure change of the inner wall of the grouting hole; a grouting head is arranged at the slurry outlet end of the grouting conduit, and a plurality of pipe end micro sensors are distributed at the slurry outlet of the grouting head; A guide cylinder is provided and the grouting catheter passes through the guide cylinder so that it can be vertically inserted into the grouting hole; it also includes a plug-in drive structure, which includes a plug-in support, a plug-in shaft, a plug-in motor and a plug-in toggle assembly. The plug-in support is fixed on the base member and is located on one side of the guide cylinder. The plug-in shaft is rotatably arranged on the top of the plug-in support and one end is connected to the output end of the plug-in motor; one end of the plug-in toggle assembly is connected to the plug-in shaft. When the plug-in toggle assembly is in a horizontal state and is located between the plug-in drive structure and the grouting catheter, the plug-in toggle assembly extends away from the end of the plug-in shaft to between the two outer ring parts.

[0007] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In an optional scheme: the plug-in and pull-out assembly includes two relatively arranged pull rod units, the pull rod unit includes a pull-out rotating sleeve and a pull-out support arm, the pull-out rotating sleeve is arranged on the plug-in and pull-out rotating shaft, one end of the pull-out support arm is on the outer wall of the pull-out rotating sleeve, when the pull-out support arm is between the plug-in support and the grouting catheter component, one end of the pull-out support arm extends between the two outer ring parts, the outer wall of the pull-out support arm contacts the outer wall of the grouting catheter component and the diameter of the pull-out support arm is smaller than the radial thickness of the outer ring part.

[0009] In an optional scheme: the toggle sleeve can slide axially on the plug-in and pull-out shaft and the two toggle sleeves are connected by a self-opening spring member, two adjusting push cylinders are also provided on the plug-in and pull-out support and the center line of the adjusting push cylinder coincides with the plug-in and pull-out shaft, and the part of the adjusting push cylinder port close to the grouting conduit member has a tightening protrusion; a rotatable rolling contact sleeve is provided on the toggle support arm, and the rolling contact sleeve is in rolling contact with the adjusting push cylinder port.

[0010] In an optional scheme: an air duct is provided on the radial wall of the grouting conduit component, a pressure-regulating air pump is provided on the top of the grouting conduit component and the air outlet end of the pressure-regulating air pump is connected to the inside of the air duct, the outer ring portion includes an annular platform and a circular air bag sealing layer, the annular platform protrudes from the circumferential surface of the grouting conduit component and the annular platform has an air cavity portion connected to the air duct, a radially slidable arc-shaped top plate is provided in the air cavity portion, the circular air bag sealing layer is provided on the outer edge of the annular platform and the hole wall pressure sensor is provided on the circumferential surface of the circular air bag sealing layer, the inner surface of the circular air bag sealing layer is in contact with the outer arc surface of the arc top plate, and the inner arc surface of the arc top plate is connected to the inner wall of the air duct through the contraction spring portion.

[0011] In an optional solution: a pushing rod is also provided inside the grouting conduit member, the center line of the pushing rod coincides with the axis of the grouting conduit member, the top of the pushing rod can slide through the top wall of the grouting conduit member and be connected to a pushing drive unit provided on the top wall of the grouting conduit member, the pushing drive unit can drive the pushing rod to move axially back and forth inside the grouting conduit member, and the bottom of the pushing rod extends to the connection between the grouting head and the grouting conduit member.

[0012] In an optional scheme: an upper pushing bar frame is provided on the top of the pushing rod, and the pushing drive unit includes a pushing shaft, a pushing motor and a pushing turntable part. The pushing shaft is rotated at the top of the grouting guide tube through the bearing seat, the pushing motor is arranged on the side of the bearing seat and its output end is connected to one end of the pushing shaft, the pushing turntable part is arranged at the end of the pushing shaft away from the pushing motor and an eccentric action column is fixed on the end face of the pushing turntable part, the eccentric action column extends into the interior of the upper pushing bar frame and can roll along the length direction of the upper pushing bar frame, and the length of the upper pushing bar frame is greater than the diameter of the pushing turntable part.

[0013] In an optional solution: the grouting head is a conical structure and has a plurality of circumferentially distributed side holes on the conical surface of the grouting head, the bottom end of the upper top bar frame has a plurality of triangularly distributed rubber push rods, the end of each rubber push rod is connected to the bottom of the push rod, and the outer walls of the plurality of rubber push rods are in contact with each other.

[0014] In an optional solution, the sum of the diameters of any two rubber ejector rods is smaller than the diameter of the ejector rod.

[0015] In an optional scheme: the slurry post-processing component includes a transfer cylinder and a filter cylinder portion, a slurry outlet hole is opened on the outer wall of the transfer cylinder near the bottom, and the grouting pump is connected to the interior of the transfer cylinder through the slurry outlet hole; the filter cylinder portion is arranged inside the transfer cylinder body, and the top edge of the filter cylinder portion is fixedly connected to the inner wall of the transfer cylinder body; a feed port is provided near the top of the side wall of the transfer cylinder body, which is connected to an external slurry storage device through a slurry pipe, and a stirring unit is also provided inside the transfer cylinder body.

[0016] In an optional scheme: the filter cylinder portion includes a filter cylinder portion and a conical filter portion, the filter cylinder portion is fixed at the center of the bottom wall of the rotating material cylinder body and the conical filter portion is arranged at the top of the filter cylinder portion, the edge of the conical filter portion is sealed with the inner wall of the rotating material cylinder body, the top of the rotating material cylinder body is provided with a top cover, the stirring unit includes a stirring rod shaft, a stirring motor and a spiral blade, the stirring rod shaft is provided at the center of the interior of the rotating material cylinder body, the top of the stirring rod shaft is rotatably connected to the top cover and is connected to the output end of the stirring motor provided on the top cover, the stirring rod shaft is provided with a stirring rod portion located on the inner side of the conical filter portion, and the spiral blade is provided at the part of the stirring rod shaft extending into the filter cylinder portion.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects:

[0018] The coal mine water conservation mining grouting filling equipment provided by the present invention collects formation pressure, temperature and acoustic wave data in real time through the hole wall pressure sensor and the pipe end micro sensor, and dynamically adjusts the grouting pump pressure in combination with the slurry front resistance distribution to avoid slurry channeling or insufficient filling, improve material utilization and reduce the risk of groundwater pollution; the plug-in drive structure drives the toggle assembly to cyclically toggle the outer ring part through the motor to realize the automatic plug-in and pull-out of the grouting conduit parts, significantly improving construction efficiency and reducing manual intervention; the slurry post-processing component continuously stirs and filters the slurry to prevent gangue blockage or slurry solidification, and ensures the continuity of grouting; the guide cylinder ensures that the grouting conduit parts are vertically inserted into the grouting hole, and the distributed design of the outer ring part enhances the contact monitoring between the conduit and the hole wall, and improves the reliability of data collection; the grouting pressure is optimized through resistance feedback, which reduces material waste and protects the hydrogeological environment of the mining area, meeting the requirements of green mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the grouting filling equipment in one embodiment of the present invention.

[0021] Figure 2 Schematic diagram of the plug-in drive structure in one embodiment of the present invention.

[0022] Figure 3 Schematic diagram of the structure of the adjustable jacking cylinder in one embodiment of the present invention.

[0023] Figure 4 Schematic diagram of the outer ring structure in one embodiment of the present invention.

[0024] Figure 5 for Figure 1 Enlarged structural diagram at point A in the middle.

[0025] Figure 6 Schematic diagram of the structure of the ejector rod in one embodiment of the present invention.

[0026] Figure 7 Schematic diagram of the structure of the slurry post-processing component in one embodiment of the present invention.

[0027] Figure numerals: base member 100, guide cylinder 110, grouting conduit member 200, outer ring portion 210, annular platform 211, arc-shaped top plate 212, air cavity portion 213, circular air bag sealing layer 214, contraction spring portion 215, hole wall pressure sensor 220, grouting head 230, side hole portion 240, pipe end micro sensor 250, bearing seat 260, pressure regulating air pump 270, air duct 280, plug-in drive structure 300, plug-in support 310, plug-in shaft 320, plug-in motor 330, toggle rotating sleeve portion 340, adjust the top cylinder 350, tightening protrusion Part 351, self-opening spring part 360, toggle support arm 370, rolling contact sleeve 380, slurry post-processing component 400, rotating cylinder body 410, top cover part 420, stirring rod shaft 430, filter cylinder part 440, slurry outlet hole 450, conical filter part 460, stirring motor 470, stirring rod part 480, spiral blade 490, slurry guide hose 500, grouting pump 600, ejecting rod 700, upper ejecting bar frame 710, rubber ejector rod 720, ejecting drive unit 800, ejecting shaft 810, ejecting motor 820, ejecting turntable part 830, and eccentric action column 840. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] The left, right, up, and down positions of the components shown in the accompanying drawings are merely one arrangement, and the specific positions are set according to specific needs.

[0030] In one embodiment, Figure 1 and Figure 2As shown, a grouting filling device for water-saving mining in a coal mine comprises a base member 100, a grouting conduit member 200 and a slurry post-processing assembly 400 connected to an external slurry storage device; a slurry guide hose 500 is connected to the top side wall of the grouting conduit member 200, and the slurry guide hose 500 is connected to a grouting pump 600 arranged on the side wall near the bottom of the slurry post-processing assembly 400; a plurality of outer ring portions 210 equidistantly distributed along the axial direction are provided on the outer wall of the grouting conduit member 200, and a hole wall pressure sensor 220 for sensing the pressure change of the inner wall of the grouting hole is provided on the circumferential surface of each outer ring portion 210, and a grouting head 230 is provided at the slurry outlet end of the grouting conduit member 200, and a plurality of pipe end micro sensors 250 are distributed at the slurry outlet of the grouting head 230; a grouting head 230 is provided on the base member 1 ... provided on the grouting head 230. There is a guide cylinder 110 and the grouting catheter 200 passes through the guide cylinder 110 so that it can be vertically inserted into the grouting hole; it also includes a plug-in drive structure 300, the plug-in drive structure 300 includes a plug-in support 310, a plug-in shaft 320, a plug-in motor 330 and a plug-in toggle assembly, the plug-in support 310 is fixed on the base member 100 and is located on one side of the guide cylinder 110, the plug-in shaft 320 is rotatably arranged on the top of the plug-in support 310 and one end is connected to the output end of the plug-in motor 330; one end of the plug-in toggle assembly is connected to the plug-in shaft 320, when the plug-in toggle assembly is in a horizontal state and is located between the plug-in drive structure 300 and the grouting catheter 200, the plug-in toggle assembly extends away from the end of the plug-in shaft 320 to between the two outer ring parts 210.

[0031] In the embodiment of the present invention, the grouting hole is formed by drilling equipment, which is connected to the goaf of the coal mining stratum; the slurry is introduced into the slurry post-processing component 400 through the external slurry storage device, and the slurry post-processing component 400 stirs and filters it to prevent the slurry from solidifying and the gangue particles in the slurry from being too large; before grouting, the entire grouting filling equipment is placed at the grouting hole, the guide cylinder 110 is aligned with the grouting hole, and the grouting pipe member 200 is placed inside the guide cylinder 110 to ensure that it is inserted into the grouting hole in a vertical state The plug-in motor 330 works and drives the plug-in shaft 320 to rotate, and the plug-in toggle assembly rotates with the plug-in shaft 320. When the plug-in toggle assembly is between the plug-in support 310 and the grouting conduit 200 and rotates downward, the plug-in toggle assembly acts on the outer ring portion 210 and pushes the outer ring portion 210 to move downward. The grouting conduit 200 is stressed and gradually inserted into the grouting hole. After the grouting head 230 extends into the goaf, the grouting pump 600 works and guides the slurry in the slurry post-processing assembly 400 through the slurry guide hose 500. The slurry enters the grouting conduit 200, and flows into the goaf through the slurry outlet of the grouting conduit 200; during the grouting process, the hole wall pressure sensor 220 contacts the inner wall of the grouting hole and senses the rock mass contraction pressure; multiple pipe end micro sensors 250 collect stratum responses of different depths in real time, including pressure, temperature and sound waves, to measure the resistance distribution of the slurry front in combination with the rock mass contraction pressure, so as to obtain the stratum resistance, and then adjust the grouting drive pressure of the grouting pump 600 according to the stratum resistance; effectively avoid high-pressure injection The slurry can easily cause the slurry to flow to non-target areas (such as fractured strata), resulting in material waste or groundwater pollution, and low-pressure grouting cannot fully fill the long-distance goaf; after the grouting is completed, the plug-in motor 330 drives the plug-in shaft 320 to rotate in the opposite direction, and then the plug-in toggle assembly rotates in the opposite direction, and then applies an upward thrust to the outer ring part 210 one by one through its own rotation. The outer ring part 210 is subjected to the force and drives the grouting pipe part 200 to move upward, so that the grouting pipe part 200 can be quickly pulled out from the grouting hole.

[0032] In one embodiment, Figure 1-Figure 3As shown, the plug-in and pull-out assembly includes two relatively arranged pull rod units, and the pull rod unit includes a pull-out sleeve portion 340 and a pull-out support arm 370. The pull-out sleeve portion 340 is provided on the plug-in and pull-out shaft 320, and one end of the pull-out support arm 370 is on the outer wall of the pull-out sleeve portion 340. When the pull-out support arm 370 is between the plug-in support 310 and the grouting conduit member 200, one end thereof extends between the two outer ring portions 210, and the outer wall of the pull-out support arm 370 contacts the outer wall of the grouting conduit member 200, and the diameter of the pull-out support arm 370 is smaller than the diameter of the outer ring portion 210. Towards thickness; In the embodiment of the present invention, the two lever units are respectively located on both sides of the grouting conduit member 200. Since the diameter of the toggle arm 370 is smaller than the radial thickness of the outer ring portion 210, the toggle arm 370 will act on the upper and lower end surfaces of the outer ring portion 210 when following the rotation of the toggle sleeve portion 340, thereby driving the vertical movement of the grouting conduit member 200, and cyclically acting on the outer wall of the grouting conduit member 200 to achieve rapid extraction or insertion of the grouting conduit member 200 into the grouting hole, thereby avoiding external force acting on the top of the grouting conduit member 200 and increasing the size of the external force equipment.

[0033] In one embodiment, Figure 1-Figure 3 As shown, the toggle sleeve 340 can slide axially on the plug-in shaft 320 and the two toggle sleeves 340 are connected by a self-opening spring 360. The plug-in support 310 is also provided with two adjusting push cylinders 350 and the center line of the adjusting push cylinder 350 coincides with the plug-in shaft 320. The portion of the adjusting push cylinder 350 port close to the grouting pipe 200 has a tightening protrusion 351; the toggle support arm 370 is provided with a rotatable rolling contact sleeve 380, and the rolling contact sleeve 380 is in rolling contact with the port of the adjusting push cylinder 350; in the embodiment of the present invention, when the toggle support arm 370 is on the side of the plug-in shaft 320 away from the grouting pipe 200, When the toggle arms 370 are in an open state, due to the elastic force of the self-opening spring part 360 to restore the deformation, the two toggle sleeve parts 340 move away from each other and the two toggle arms 370 are in an open state. When the toggle arms 370 gradually rotate to the side of the plug-in shaft 320 close to the grouting catheter part 200, due to the presence of the tightening protrusion 351, the two toggle arms 370 approach each other and press on the outer wall of the grouting catheter part 200; the toggle arms 370 rotate and act on the outer ring part 210; and the two toggle arms 370 move away from each other to quickly detach from the grouting catheter part 200, thereby avoiding the front end of the toggle arm 370 acting on the outer ring part 210 and scratching the outer ring part 210, and at the same time avoiding the front end of the toggle arm 370 from breaking due to excessive torque.

[0034] In one embodiment, Figure 1 and Figure 4As shown, the radial wall of the grouting conduit 200 is provided with an air channel 280, the top of the grouting conduit 200 is provided with a pressure-regulating air pump 270 and the air outlet end of the pressure-regulating air pump 270 is connected to the inside of the air channel 280, the outer ring portion 210 includes an annular platform 211 and a circular air bag sealing layer 214, the annular platform 211 protrudes from the circumferential surface of the grouting conduit 200 and the annular platform 211 has an air cavity portion 213 connected to the air channel 280, a radially slidable arc-shaped top plate 212 is provided in the air cavity portion 213, the circular air bag sealing layer 214 is provided on the outer edge of the annular platform 211 and the hole wall pressure sensor 220 is provided on the circumferential surface of the circular air bag sealing layer 214, the inner surface of the circular air bag sealing layer 214 is in contact with the outer arc surface of the arc-shaped top plate 212, and the arc-shaped top The inner arc surface of the plate 212 is connected to the inner wall of the air channel 280 through the contraction spring portion 215; in the embodiment of the present invention, the pressure-regulating air pump 270 can adjust the pressure in the air channel 280 by sucking or injecting air flow. When the air pressure in the air channel 280 increases, the arc-shaped top plate 212 is acted upon by the air pressure and radially pushes the circular air bag sealing layer 214. The circular air bag sealing layer 214 expands outward, thereby increasing the diameter of the outer ring portion 210, so that the hole wall pressure sensor 220 can rest against the inner wall of the grouting hole; and when the grouting catheter 200 is inserted into or pulled out of the grouting hole, the air pressure in the air channel 280 is too low. Under the action of the restoring elastic force of the contraction spring portion 215, the circular air bag sealing layer 214 contracts, and the diameter of the entire outer ring portion 210 is smaller, which facilitates the insertion or removal of the grouting catheter 200 into or out of the grouting hole.

[0035] In one embodiment, Figure 1 、 Figure 5 and Figure 6 As shown, a push rod 700 is further provided inside the grouting conduit 200, the center line of the push rod 700 coincides with the axis of the grouting conduit 200, the top of the push rod 700 can slide through the top wall of the grouting conduit 200 and is connected to a push driving unit 800 provided on the top wall of the grouting conduit 200, the push driving unit 800 can drive the push rod 700 to move axially back and forth inside the grouting conduit 200, and the bottom of the push rod 700 extends to the connection between the grouting head 230 and the grouting conduit 200; in the embodiment of the present invention, when the pipe end is slightly When the formation response sensed by the type sensor 250 and multiple hole wall pressure sensors 220 shows that the grouting pressure is abnormal, the ejection drive unit 800 works and drives the ejection rod 700 to move back and forth along the axis of the grouting conduit 200. The top of the ejection rod 700 will push the slurry blocked in the grouting head 230 to increase its fluidity and make it flow out from the grouting port under a certain pressure, which can effectively eliminate the blockage. The diameter of the ejection rod 700 is relatively small and is located in the center of the grouting conduit 200, which will not increase the resistance to grouting flow inside the grouting conduit 200.

[0036] In one embodiment, Figure 1、 Figure 5 and Figure 6 As shown, an upper push bar frame 710 is provided on the top of the push rod 700, and the push driving unit 800 includes a push shaft 810, a push motor 820 and a push turntable portion 830. The push shaft 810 is rotated through the bearing seat 260 and is arranged on the top of the grouting pipe member 200. The push motor 820 is arranged on the side of the bearing seat 260 and its output end is connected to one end of the push shaft 810. The push turntable portion 830 is arranged at the end of the push shaft 810 away from the push motor 820 and an eccentric action column 840 is fixed on the end surface of the push turntable portion 830. The eccentric action column 840 extends into the interior of the upper push bar frame 710 and can rotate along The upper top bar frame 710 rolls in the length direction, and the length of the upper top bar frame 710 is greater than the diameter of the top-moving turntable portion 830; in the embodiment of the present invention, the top motor 820 works and drives the top-moving shaft 810 to rotate, and the top-moving shaft 810 drives the top-moving turntable portion 830 to rotate, and the eccentric action column 840 rotates with the top-moving turntable portion 830 and rotates around the axis of the top-moving shaft 810, and the eccentric action column 840 acts on the upper top bar frame 710 and makes it move back and forth vertically, and the ejector rod 700 moves with the upper top bar frame 710 and its bottom acts on the slurry in the grouting head 230 to make it flow out from the slurry outlet of the grouting head 230.

[0037] In one embodiment, Figure 1 、 Figure 5 and Figure 6 As shown, the grouting head 230 has a conical structure and a plurality of circumferentially distributed side holes 240 are formed on the conical surface of the grouting head 230. The bottom end of the upper top bar frame 710 has a plurality of rubber push rods 720 with a central triangular distribution. The end of each rubber push rod 720 is connected to the bottom of the ejector rod 700, and the outer walls of the plurality of rubber push rods 720 contact each other. In this embodiment of the present invention, when the ejector rod 700 moves downward following the upper top bar frame 710, the plurality of rubber push rods 720 are subjected to the reaction force of the slurry in the grouting head 230, and the plurality of rubber push rods 720 move away from each other and spread out. The downward movement of the rubber push rods 720 increases the area acting on the slurry, allowing the slurry to flow out of the plurality of side holes 240, thereby quickly eliminating blockages. The sum of the diameters of any two rubber push rods 720 is less than the diameter of the ejector rod 700, thereby reducing the resistance of the rubber push rods 720 to the slurry flow.

[0038] In one embodiment, Figure 1 and Figure 7As shown, the slurry post-processing component 400 includes a transfer cylinder 410 and a filter cylinder portion, and a slurry outlet hole 450 is opened near the bottom of the outer wall of the transfer cylinder 410, and the grouting pump 600 is connected to the interior of the transfer cylinder 410 through the slurry outlet hole 450; the filter cylinder portion is arranged inside the transfer cylinder 410, and the top edge of the filter cylinder portion is fixedly connected to the inner wall of the transfer cylinder 410; the side wall of the transfer cylinder 410 has a feed port connected to the external slurry storage device through a slurry pipe near the top, and a stirring unit is also provided inside the transfer cylinder 410; in an embodiment of the present invention, after the slurry enters the interior of the transfer cylinder 410, the stirring unit stirs the slurry to avoid agglomeration and break up larger gangue to prevent its particle size from being too large and clogging the grouting conduit 200; at the same time, the filter cylinder portion can prevent gangue with larger particle size from entering the slurry guide hose 500 and the grouting conduit 200 through the slurry outlet hole 450.

[0039] In one embodiment, Figure 1 and Figure 7 As shown, the filter cylinder portion includes a filter cylinder portion 440 and a conical filter portion 460, the filter cylinder portion 440 is fixed to the center of the bottom wall of the rotating material cylinder body 410 and the conical filter portion 460 is arranged at the top of the filter cylinder portion 440, the edge of the conical filter portion 460 is sealed with the inner wall of the rotating material cylinder body 410, and the top of the rotating material cylinder body 410 is provided with a top cover 420, the stirring unit includes a stirring rod shaft 430, a stirring motor 470 and a spiral blade 490, the stirring rod shaft 430 is provided at the inner center of the rotating material cylinder body 410, the top of the stirring rod shaft 430 is rotatably connected to the top cover 420 and is connected to the output end of the stirring motor 470 provided on the top cover 420, the stirring rod shaft 430 is provided with a stirring rod part 480 located on the inner side of the conical filter portion 460, and the spiral blade 490 is provided. At the part where the stirring rod shaft 430 extends into the filter cylinder portion 440; in the embodiment of the present invention, the stirring motor 470 works and drives the stirring rod shaft 430 to rotate, and the stirring rod member 480 and the spiral blade 490 both rotate along with the stirring rod shaft 430. Since the spiral blade 490 is located inside the filter cylinder portion 440, the rotation of the spiral blade 490 can cause the slurry inside the filter cylinder portion 440 to move upward in a rotational manner. The stirring rod member 480 rotates along with the stirring rod shaft 430 and stirs the slurry inside the conical filter portion 460, and can act on the upward-moving slurry to crush larger-sized gangue, so as to ensure that the slurry enters the slurry outlet hole 450 through the filter holes of the filter cylinder portion 440 and the conical filter portion 460, and is finally injected into the goaf through the grouting conduit 200, thereby reducing blockage and improving the utilization rate of gangue.

[0040] The above embodiment provides a grouting and filling device for water-retaining mining in coal mines. The working principle of the entire grouting and filling device is as follows:

[0041] Equipment positioning and grouting catheter insertion

[0042] The device is positioned using the base member 100, aligning the guide cylinder 110 with the pre-drilled grouting hole. The grouting conduit 200 is initially placed within the guide cylinder 110. After the plug-in drive mechanism 300 is activated, the plug-in motor 330 rotates the plug-in shaft 320, driving the toggle arm 370 downward, pushing the outer ring 210 to gradually insert the grouting conduit 200 into the grouting hole. During the insertion process, the pressure-regulating air pump 270 reduces the air pressure in the airway 280, causing the circular airbag sealing layer 214 to contract, reducing the diameter of the outer ring 210 and reducing frictional resistance.

[0043] Grouting process and formation monitoring

[0044] After the grouting head 230 reaches the goaf, the pressure-regulating air pump 270 increases the air pressure in the air passage 280, pushing the curved top plate 212 radially to expand. This causes the circular airbag sealing layer 214 to expand and adhere to the grouting hole wall. The hole wall pressure sensor 220 monitors the rock mass contraction pressure in real time. The slurry enters the slurry post-processing assembly 400 through an external device. The stirring unit (stirring rod 480 and spiral blade 490) prevents the slurry from solidifying. Large particles of gangue are filtered through the filter cylinder (filter cylinder 440 and conical filter 460). The treated slurry is then injected into the grouting conduit 200 via the grouting pump 600 and grouting hose 500, ultimately flowing out of the side hole 240 of the grouting head 230 to fill the goaf.

[0045] During the grouting process, the micro sensor 250 at the pipe end collects formation pressure, temperature and acoustic wave data, and combines the monitoring results of the hole wall pressure sensor 220 to dynamically adjust the pressure of the grouting pump 600 to avoid slurry crossflow or insufficient filling.

[0046] Anti-blocking and dynamic adjustment

[0047] When the sensor detects abnormal grouting pressure, the jacking motor 820 drives the jacking turntable 830 to rotate, driving the upper jacking frame 710 and the jacking rod 700 to reciprocate through the eccentric action column 840. The rubber jacking rod 720 at the bottom of the jacking rod 700 expands to clear the clogged slurry in the grouting head 230 and ensure continuous slurry flow.

[0048] The grouting conduit 200 is pulled out

[0049] After grouting is completed, the plug-in motor 330 reverses, shifting the support arm 370 to rotate upward and push the outer ring portion 210 in sequence, thereby removing the grouting conduit 200 in sections. Before removal, the pressure regulating air pump 270 reduces the air pressure in the air channel 280, causing the circular airbag sealing layer 214 to shrink and reduce frictional resistance.

[0050] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A grouting and filling device for water-saving mining in coal mines, comprising a base frame, a grouting conduit, and a slurry post-processing assembly connected to an external slurry storage device; a slurry guide hose is connected to the top side wall of the grouting conduit, and the slurry guide hose is connected to a grouting pump located on the side wall near the bottom of the slurry post-processing assembly, characterized in that: The outer wall of the grouting conduit is provided with a plurality of outer ring portions distributed at equal intervals along its axial direction, and a hole wall pressure sensor for sensing the pressure change on the inner wall of the grouting hole is provided on the circumferential surface of each outer ring portion. The grouting conduit is provided with a grouting head at the slurry outlet, and a plurality of pipe end micro sensors are distributed at the slurry outlet of the grouting head; A guide cylinder is provided on the base frame and the grouting conduit passes through the guide cylinder so as to be vertically inserted into the grouting hole; It also includes a plug-in drive structure, which includes a plug-in support, a plug-in shaft, a plug-in motor and a plug-in toggle assembly; The plug-in support is fixed on the base member and is located on one side of the guide cylinder. The plug-in shaft is rotatably arranged on the top of the plug-in support and one end of the shaft is connected to the output end of the plug-in motor. One end of the plug-in and pull-out assembly is connected to the plug-in and pull-out shaft. When the plug-in and pull-out assembly is in a horizontal state and is located between the plug-in and pull-out drive structure and the grouting conduit, the plug-in and pull-out assembly extends away from the end of the plug-in and pull-out shaft to between the two outer ring parts. The plug-in and pull-out assembly includes two oppositely arranged pull rod units; The toggle lever unit includes a toggle sleeve and a toggle support arm, wherein the toggle sleeve is provided on the plug-in / pull-out shaft, one end of the toggle support arm is connected to the outer wall of the toggle sleeve, and when the toggle support arm is between the plug-in / pull-out support and the grouting conduit, one end of the toggle support arm extends between the two outer ring portions; The outer wall of the toggle support arm contacts the outer wall of the grouting conduit member, and the diameter of the toggle support arm is smaller than the radial thickness of the outer ring portion; The toggle sleeve portion can slide axially on the plug-in shaft and the two toggle sleeve portions are connected by a self-opening spring member; The plug-in support is also provided with two adjustable push-up cylinders, and the center lines of the adjustable push-up cylinders coincide with the plug-in shafts. The portion of the adjustable push-up cylinder ports close to the grouting conduit has a tightening protrusion. The toggle support arm is provided with a rotatable rolling contact sleeve, and the rolling contact sleeve is in rolling contact with the port of the regulating push cylinder.

2. The grouting filling equipment for water-retaining mining in coal mines according to claim 1, characterized in that: An air passage is provided on the radial wall of the grouting conduit, a pressure regulating air pump is provided on the top of the grouting conduit, and an air outlet of the pressure regulating air pump is connected to the inside of the air passage; The outer ring portion includes an annular platform and a circular airbag blocking layer, wherein the annular platform protrudes from the circumferential surface of the grouting conduit and has an air cavity portion connected to the airway, and a radially slidable arc-shaped top plate is provided in the air cavity portion; The circular airbag sealing layer is arranged on the outer edge of the annular platform and the hole wall pressure sensor is arranged on the circumferential surface of the circular airbag sealing layer. The inner surface of the circular airbag sealing layer contacts the outer arc surface of the arc top plate, and the inner arc surface of the arc top plate is connected to the inner wall of the airway through the contraction spring part.

3. The grouting filling equipment for coal mine water conservation mining according to claim 1 is characterized in that: A push rod is also provided inside the grouting conduit, and the center line of the push rod coincides with the axis of the grouting conduit; The top of the ejector rod can slide through the top wall of the grouting conduit and be connected to the ejector drive unit provided on the top wall of the grouting conduit. The ejector drive unit can drive the ejector rod to move axially back and forth inside the grouting conduit, and the bottom of the ejector rod extends to the connection between the grouting head and the grouting conduit.

4. The grouting filling equipment for water-retaining mining in coal mines according to claim 3 is characterized in that: The top of the ejector rod is provided with an upper ejector frame, and the ejector drive unit includes an ejector shaft, an ejector motor and an ejector turntable; The jacking shaft is rotated through the bearing seat and is arranged on the top of the grouting guide tube member. The jacking motor is arranged on the side of the bearing seat and its output end is connected to one end of the jacking shaft. The jacking turntable part is arranged at the end of the jacking shaft away from the jacking motor and an eccentric action column is fixed on the end surface of the jacking turntable part. The eccentric action column extends into the interior of the upper jacking bar frame and can roll along the length direction of the upper jacking bar frame. The length of the upper jacking bar frame is greater than the diameter of the jacking turntable part.

5. The grouting filling equipment for water-retaining mining in coal mines according to claim 4 is characterized in that: The grouting head has a conical structure and has a plurality of circumferentially distributed side holes on the conical surface of the grouting head. The bottom end of the upper top bar frame has a plurality of triangularly distributed rubber push rods. The end of each rubber push rod is connected to the bottom of the push rod, and the outer walls of the plurality of rubber push rods are in contact with each other.

6. The grouting filling equipment for water-retaining mining in coal mines according to claim 5, characterized in that: The sum of the diameters of any two rubber ejector rods is smaller than the diameter of the ejector rod.

7. The grouting filling equipment for water-retaining mining in coal mines according to claim 1, characterized in that: The slurry post-processing component includes a transfer cylinder and a filter cylinder. A slurry outlet hole is opened near the bottom of the outer wall of the transfer cylinder, and the grouting pump is connected to the interior of the transfer cylinder through the slurry outlet hole; the filter cylinder is arranged inside the transfer cylinder, and the top edge of the filter cylinder is fixedly connected to the inner wall of the transfer cylinder; a feed port connected to an external slurry storage device through a slurry pipe is provided near the top of the side wall of the transfer cylinder, and a stirring unit is also provided inside the transfer cylinder.

8. The grouting filling equipment for water-retaining mining in coal mines according to claim 7, characterized in that: The filter screen cylinder portion includes a filter cartridge portion and a conical filter screen portion; The filter cartridge is fixed at the center of the bottom wall of the transfer cylinder and the conical filter screen is arranged on the top of the filter cartridge. The edge of the conical filter screen is sealed with the inner wall of the transfer cylinder. The top of the transfer cylinder is provided with a top cover. The stirring unit includes a stirring rod shaft, a stirring motor and a spiral blade; the stirring rod shaft is arranged at the center of the rotating barrel body, the top of the stirring rod shaft is rotatably connected to the top cover and is connected to the output end of the stirring motor provided on the top cover, the stirring rod shaft is provided with a stirring rod part located on the inner side of the conical filter part, and the spiral blade is provided on the part of the stirring rod shaft extending into the filter barrel part.

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