CN114776368A

CN114776368A - System for adopt to fill and stay integration and combine and adopt waste filling working face

Info

Publication number: CN114776368A
Application number: CN202210486048.2A
Authority: CN
Inventors: 刘建功; 赵家巍; 王毅颖; 史艳楠
Original assignee: Hebei Siwei Zhihe Technology Co ltd; Hebei University of Engineering
Current assignee: Hebei Siwei Zhihe Technology Co ltd; Hebei University of Engineering
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-07-22

Abstract

The invention discloses a system for a mining, filling and retaining integrated fully-mechanized gangue filling working surface, which comprises a moving platform, a gangue blocking template, a grabbing and lifting mechanism and a grouting unit, wherein the grabbing and lifting mechanism is arranged on the moving platform in a sliding manner and comprises a base and at least two driving telescopic rods, one ends of the driving telescopic rods are hinged with the base, the other end of each driving telescopic rod is detachably connected with the gangue blocking template, each driving telescopic rod can rotate relative to the gangue blocking template, and the gangue blocking template can stretch and retract; the grouting unit comprises a slurry storage barrel, a grouting pump and a self-advancing hollow grouting anchor rod which are sequentially connected through a pipeline, grouting holes are formed in the gangue blocking template corresponding to the self-advancing hollow grouting anchor rod, and the self-advancing hollow grouting anchor rod can penetrate through the corresponding grouting holes. The invention improves the working face propulsion efficiency and realizes high-efficiency coal mining, filling and entry retaining.

Description

System for adopt to fill and stay integrated comprehensive mining waste filling working face

Technical Field

The invention relates to the technical field of mining, in particular to a system for a mining, filling and retaining integrated fully-mechanized gangue filling working face.

Background

The gangue-based solid waste generated by coal mining is mainly directly discharged from the ground for a long time, and causes serious pollution to air, water and soil in a large range of a mining area. At present, resources are saved and the environment is protected, environmental standards and related requirements in the development process of a mining area are becoming strict day by day, the treatment of solid waste of the waste rock is imperative, the elimination of the harm of the waste rock and the green utilization of the waste rock become difficult tasks to be solved urgently for enterprises, and the method is also an important technical attack and closing direction for green coal mining. The rapid development of the waste filling mining technology in recent years is highly regarded by the government, and the nation continues to develop a plurality of policy laws and regulations and standard specifications to guide the sustainable and healthy development of the filling coal mining industry.

The filling and retaining roadway is a necessary process for filling and exploiting a high gas mine, a gas outburst mine and a mine with rock stratum movement and surface deformation control requirements. The gob-side entry retaining is particularly characterized in that the filling working face is used for grouting and reinforcing gangue filling dispersion bodies on the inner side of the entry to form an artificial entry wall, and the gob-side entry retaining is different from the traditional gob-side entry retaining process, mechanism and equipment. In the working face extraction process, the auxiliary gangue transporting gate way of the working face is reserved along the filling body through an effective roadside bulk material filling body forming technology and is used as a coal transporting gate way of the next working face. Along filling the entry retaining technique and having changed U type ventilation mode into Y type ventilation mode, solved the problem that the working face gas is gathered and transfinites. And a section coal pillar is cancelled along the roadway filling and retaining technology, so that the region concentrated stress is avoided, and the rock stratum movement and the earth surface deformation control are facilitated.

The gangue solid filling mining is developed by building pressed coal at first, along with the deep advance of the country to the ecological civilization construction of a mining area, more and more large-scale production and large newly-built mines face the problem of disposal of a large amount of gangue solid waste, the filling working face is large in gangue filling amount and high in advancing speed, the existing gangue solid filling working face is complex in roadway retaining process, high in labor intensity and low in efficiency, and the requirement for rapid advance of the gangue filling working face cannot be met.

Disclosure of Invention

The invention aims to provide a system for a mining, filling and retaining integrated fully-mechanized coal gangue filling working face, which solves the problems in the prior art and improves the efficiencies of gangue filling and roadway retaining.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a system for a mining, filling and reserving integrated fully-mechanized gangue filling working surface, which comprises a mobile platform, a gangue blocking template, a grabbing and lifting mechanism and a grouting unit, wherein the grabbing and lifting mechanism is arranged on the mobile platform in a sliding manner and comprises a base and at least two driving telescopic rods, one end of each driving telescopic rod is hinged with the base, the base can slide along the coal mining direction relative to the mobile platform, the other end of each driving telescopic rod is detachably connected with the gangue blocking template, each driving telescopic rod can rotate relative to the gangue blocking template, and the gangue blocking template can stretch and retract; the slip casting unit is including looping through tube coupling's thick liquid storage bucket, grouting pump and advancing formula cavity slip casting stock certainly, correspond on the cash blocking template advancing formula cavity slip casting stock certainly is provided with the slip casting hole, advancing formula cavity slip casting stock certainly can pass correspondingly the slip casting hole.

Preferably, the number of the driving telescopic rods is two, and the heights of the hinge points of the two driving telescopic rods and the base are different.

Preferably, the waste rock blocking template comprises a middle positioning plate, an upper expansion plate, a lower expansion plate, an upper extending jack and a lower extending jack, the bottom end of the upper expansion plate and the bottom end of the upper extending jack are fixedly connected with the middle positioning plate respectively, and the top end of the lower expansion plate and the top end of the lower extending jack are fixedly connected with the middle positioning plate respectively; the top end of the upper extending jack is fixedly connected with the top end of the upper expansion plate through a connecting plate, and the bottom end of the lower extending jack is fixedly connected with the bottom end of the lower expansion plate through a connecting plate; still correspond on the middle part locating plate the initiative telescopic link is provided with articulated seat, the initiative telescopic link with correspond articulated seat is articulated.

Preferably, the driving telescopic rod is a hydraulic telescopic rod; the front end of the moving platform is connected with an end bracket of the coal face through a chain.

Preferably, two parallel rails are fixedly arranged on the top surface of the moving platform, the direction of the rails is the same as the length direction of the moving platform, and the base is in sliding fit with the two rails.

Preferably, a traction motor capable of driving the base to slide along the two rails is fixedly arranged on the moving platform.

Preferably, the front end of self-advancing hollow slip casting stock is provided with alloy drill bit and precession screw thread, just alloy drill bit compare the precession screw thread leans on forward, be provided with a plurality of slip casting mouths on the body of rod of self-advancing hollow slip casting stock.

Compared with the prior art, the invention achieves the following technical effects:

the system for the mining, filling and retaining integrated fully-mechanized gangue filling working face improves the gangue filling and roadway retaining efficiency. The system for the mining, filling and retaining integrated fully-mechanized gangue filling working face greatly improves the working face propulsion efficiency and realizes efficient coal mining, filling and retaining. The grabbing mechanism and the waste rock blocking template in the system for the mining, filling and retaining integrated fully-mechanized coal mining and filling working surface are detachable, namely the grabbing mechanism and the waste rock blocking template are separately designed, so that the system has the advantages of simple structure and flexible use, does not interfere with an end support, a filling support and a bottom-discharging filling conveyor, and automatically advances along with the propulsion of a working surface, and the height of a matched lifting platform and the height of the waste rock blocking template are flexible and adjustable, so that the system has strong adaptability to the coal bed height, geological conditions and mine production imbalance; the method for mining, filling and retaining the integrated fully-mechanized coal mining gangue filling working face utilizes the characteristic of strong mine pressure and weak appearance of filling mining, changes the traditional gob-side entry retaining process, modifies the dispersion into a solid material with better cementation to form a stable roadway wall, replaces an artificial entry retaining mode, has the advantages of flexible adjustment, strong integrity, high entry retaining speed, low labor intensity and the like, is convenient for production organization and operation, completely realizes a mechanized coal mining-filling-entry retaining parallel operation mode, and greatly improves the coal mining-filling-entry retaining efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a system for mining, filling and retaining integrated fully mechanized gangue filling working face of the invention;

FIG. 2 is a partial structural schematic diagram I of the system for mining, filling and retaining integrated fully mechanized gangue filling working face of the invention;

FIG. 3 is a partial structural schematic diagram II of the system for mining, filling and retaining integrated fully-mechanized gangue filling working face;

FIG. 4 is a schematic structural diagram of a gangue stopping template in the system for mining, filling and retaining integrated fully-mechanized gangue filling working face;

FIG. 5 is a schematic structural diagram of a self-propelled hollow grouting anchor rod in the system for mining, filling and retaining integrated fully-mechanized gangue filling working face of the invention;

wherein: 1. a coal body in front of the working face; 2. a coal mining machine; 3. an end bracket; 4. filling a roadway; 5. a chain; 6. a mobile platform; 7. a track; 8. a grabbing and lifting mechanism; 801. a base; 802. a first active telescopic column; 803. a second active telescopic column; 9. a space to be filled; 10. a waste rock blocking template; 11. a reinforcing mesh; 12. filling waste rock; 13. self-propelled hollow grouting anchor rods; 131. a grouting port; 132. an alloy drill bit; 133. screwing in the screw thread; 14. grouting waste rock; 15. grouting pump; 16. a gangue transshipment device; 17. a middle positioning plate; 18. an upper expansion plate; 19. a lower expansion plate; 20. a jack is extended upwards; 21. a jack is extended downwards; 22. a first hinge mount; 23. a second hinge mount; 24. and (4) grouting pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of protection of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.

As shown in fig. 1 to 5: the embodiment provides a system for a mining, filling and remaining integrated fully-mechanized coal mining gangue filling working surface, which comprises a mobile platform 6, a gangue blocking template 10, a grabbing and lifting mechanism 8 and a grouting unit.

Wherein, the mobile platform 6 is arranged in the roadway 4 along the filling and retaining roadway; the coal mining machine 2 is arranged behind the coal body 1 in front of the working face, the front end of the moving platform 6 is connected with the end support 3 of the coal mining working face through the chain 5, and the moving platform 6 can be driven to move forwards through the chain 5 when the end support 3 moves forwards.

The grabbing and lifting mechanism 8 is arranged on the moving platform 6 in a sliding mode, the grabbing and lifting mechanism 8 comprises a base 801 and two driving telescopic rods, wherein one end of each driving telescopic rod is hinged to the base 801, the driving telescopic rods are a first driving telescopic rod 802 and a second driving telescopic rod 803 respectively, and the heights of hinged points of the first driving telescopic rod 802 and the second driving telescopic rod 803 to the base 801 are different. The base 801 can slide along the coal mining direction relative to the moving platform 6, specifically, two parallel rails 7 are fixedly arranged on the top surface of the moving platform 6, the direction of the rails 7 is the same as the length direction of the moving platform 6, and the base 801 is in sliding fit with the two rails 7. A traction motor capable of driving the base 801 to slide along the two rails 7 is fixedly arranged on the movable platform 6.

The other end of the first driving telescopic rod 802 and the other end of the second driving telescopic rod 803 are detachably connected with the waste rock blocking template 10, each driving telescopic rod can rotate relative to the waste rock blocking template 10, and the waste rock blocking template 10 can stretch out and draw back; in this embodiment, the first active telescopic rod 802 and the second active telescopic rod 803 are both hydraulic telescopic rods.

The waste rock blocking template 10 comprises a middle positioning plate 17, an upper expansion plate 18, a lower expansion plate 19, an upper extending jack 20 and a lower extending jack 21, the bottom end of the upper expansion plate 18 and the bottom end of the upper extending jack 20 are fixedly connected with the middle positioning plate 17 respectively, and the top end of the lower expansion plate 19 and the top end of the lower extending jack 21 are fixedly connected with the middle positioning plate 17 respectively; the top end of the upper extending jack 20 is fixedly connected with the top end of the upper expansion plate 18 through a connecting plate, and the bottom end of the lower extending jack 21 is fixedly connected with the bottom end of the lower expansion plate 19 through a connecting plate; the middle positioning plate 17 is further provided with a first hinge seat 22 and a second hinge seat 23, the other end of the first driving telescopic rod 802 is hinged to the first hinge seat 22, and the other end of the second driving telescopic rod 803 is hinged to the second hinge seat 23.

The grouting unit comprises a slurry storage barrel, a grouting pump 15 and a self-advancing hollow grouting anchor rod 13 which are sequentially connected through a pipeline, grouting holes are formed in the gangue blocking template 10 corresponding to the self-advancing hollow grouting anchor rod 13, and the self-advancing hollow grouting anchor rod 13 can penetrate through the corresponding grouting holes. In this embodiment, the slurry storage tank is a stirring tank.

The front end of the self-advancing hollow grouting bolt 13 is provided with an alloy drill 132 and a screw thread 133, and the alloy drill 132 is located ahead of the screw thread 133, and the body of the self-advancing hollow grouting bolt 13 is provided with a plurality of grouting ports 131.

The specific use method of the system for mining, filling and retaining integrated fully-mechanized gangue filling working face of the embodiment is as follows:

(1) filling and roadway retaining operation in the initial mining range is carried out until the filling and roadway retaining operation in the initial mining range is completed, the front end of the mobile platform 6 is connected with the end bracket 3 of the coal face through the chain 5, and the mobile platform 6 is driven to move forwards when the end bracket 3 moves forwards;

the filling and entry retaining operation in the initial mining range comprises the following steps:

step 1: in the initial mining range of the working face, a single prop and a square timber are used for stopping waste rock to form a retained roadway wall body, so that a filling and retained roadway space is formed and the waste rock is prevented from sliding off;

and 2, step: after the working face equipment is installed, before filling coal mining operation is started, single pillars are arranged on the 2 nd transition rack lane side of the tail in a driving mode, the interval between the single pillars is 500mm, the length of each single pillar is 3m for the first time, 7 single pillars are totally arranged, a square timber is arranged on the side, close to the mining cavity, of each single pillar in a connected mode, the square timber and the single pillars are bound through iron wires, an artificial entry retaining wall body is formed, and the effects of waste rock blocking and entry retaining are achieved;

and step 3: and (4) continuing to erect single pillars and accumulate square timbers along with the advance of the working face until the filling and entry retaining operation within the primary mining range is completed.

(2) Installing a waste rock blocking template 10 on a grabbing and lifting mechanism 8, enabling a driving telescopic rod on the grabbing and lifting mechanism 8 to be hinged to the waste rock blocking template 10, and adjusting the angle and the length of the driving telescopic rod to enable the waste rock blocking template 10 to be located between a space 9 to be filled and a roadway 4 along the filling direction, wherein the space 9 to be filled is connected with a filled waste rock filling body 12;

(3) extending the waste rock blocking template 10 to enable the top end of the waste rock blocking template 10 to be in close contact with the top end of the roadway, enabling the bottom end of the waste rock blocking template 10 to be in close contact with the bottom end of the roadway, and enabling the waste rock blocking template 10 to meet the design supporting strength;

(4) sequentially laying and fixing a reinforcing mesh 11 and an impermeable membrane on one side of the waste rock blocking template 10 close to the space of the body to be filled, and ensuring that the reinforcing mesh 11 is connected with the top and the bottom;

(5) unloading the waste rock conveyed to the coal face from the ground or underground to a goaf through waste rock transfer equipment 16, and densely filling the space 9 to be filled from a tail to a head by using a solid filling hydraulic support with a pushing device;

(6) after the space 9 to be filled on one side of the waste rock blocking template 10 close to the goaf is filled with waste rock and is jacked, a self-propelled hollow grouting anchor rod 13 penetrates through a grouting hole reserved in the waste rock blocking template 10 by using an anchor rod drilling machine and is driven into a waste rock filling body 12;

(7) connecting a self-advancing hollow grouting anchor rod 13 with a 24-way joint of a grouting pipe, grouting and reinforcing the roadside gangue filling body 12 by adopting designed grouting pressure, stopping grouting operation after grouting to designed grouting amount, removing the gangue blocking template 10 after the gangue and grouting slurry are solidified and formed, and sliding the grabbing mechanism 8 to the front end of the movable platform 6;

(8) and (5) repeating the steps (2) to (7) until the coal mining work is finished.

It should be noted that, after the waste rock blocking template 10 is removed in the step (7), a tray and a nut need to be installed on the self-advancing hollow grouting anchor rod 13 which is driven into the waste rock filling body 12 in the step (6), but pretightening force is not applied temporarily; and (4) after the gangue grouting body 14 formed in the step (7) reaches the final strength, increasing the pre-tightening force of the self-advancing hollow grouting anchor rod 13 to the design requirement to form a stable structure for supporting the top plate.

The specific process requirements are as follows:

(1) the designed water-cement ratio is adopted to prepare the retained roadway grouting slurry, and the grouting pump 15 and the stirring barrel are arranged at the crossheading air inlet section of the track 7.

(2) The step pitch of the entry retaining is consistent with the filling step pitch, and the grouting reinforcement width meets the design requirement.

(3) In order to ensure that the waste rock grouting body 14 is solidified and formed, the roadway retaining template can be moved after the grouting reaches the designed movement time, a single support is immediately arranged after the roadway retaining template is moved away, the roadway retaining space is continuously maintained by the single support, the single body can be withdrawn after the waste rock grouting body 14 is fully maintained and has the support strength, and the single body support time is not less than the slurry final setting time.

(4) After each cycle of grouting operation is finished, the grout in the grouting pipe 24 must be washed clean by clear water so as to prevent the grout from standing and coagulating in the pipeline.

(5) And (3) lagging and reinforcing supports are required to be arranged along the roadway 4 of the filling and retaining roadway, two rows of beam columns are arranged in the roadway, the row spacing of the reinforcing single supports is 1m, the supporting strength of the single supports is 1MPa, and the lagging and reinforcing support distance is not less than 30 m.

In the description of the present invention, it should be noted that the terms "top", "bottom", "front", "back", "vertical", "horizontal", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. The utility model provides a adopt to fill system of staying integration combined mining waste filling working face which characterized in that: the device comprises a mobile platform, a waste rock blocking template, a grabbing mechanism and a grouting unit, wherein the grabbing mechanism is arranged on the mobile platform in a sliding manner and comprises a base and at least two driving telescopic rods, one end of each driving telescopic rod is hinged to the base, the base can slide along the coal mining direction relative to the mobile platform, the other end of each driving telescopic rod is detachably connected with the waste rock blocking template, each driving telescopic rod can rotate relative to the waste rock blocking template, and the waste rock blocking template can stretch and retract; the slip casting unit is including looping through tube coupling's thick liquid storage bucket, grouting pump and advancing formula cavity slip casting stock certainly, correspond on the cash blocking template advancing formula cavity slip casting stock certainly is provided with the slip casting hole, advancing formula cavity slip casting stock certainly can pass correspondingly the slip casting hole.

2. The mining, filling and remaining integrated fully mechanized gangue filling face system according to claim 1, which is characterized in that: the two driving telescopic rods are different in height from the hinged point of the two driving telescopic rods and the base.

3. The mining, filling and remaining integrated fully mechanized gangue filling face system according to claim 1, which is characterized in that: the waste rock blocking template comprises a middle positioning plate, an upper expansion plate, a lower expansion plate, an upper extending jack and a lower extending jack, wherein the bottom end of the upper expansion plate and the bottom end of the upper extending jack are fixedly connected with the middle positioning plate respectively, and the top end of the lower expansion plate and the top end of the lower extending jack are fixedly connected with the middle positioning plate respectively; the top end of the upper extending jack is fixedly connected with the top end of the upper expansion plate through a connecting plate, and the bottom end of the lower extending jack is fixedly connected with the bottom end of the lower expansion plate through a connecting plate; still correspond on the middle part locating plate the initiative telescopic link is provided with articulated seat, the initiative telescopic link with correspond articulated seat is articulated.

4. The mining, filling and remaining integrated fully mechanized gangue filling face system according to claim 1, which is characterized in that: the driving telescopic rod is a hydraulic telescopic rod; the front end of the moving platform is connected with an end support of the coal face through a chain.

5. The system for mining, filling and reserving integrated fully-mechanized gangue filling working surface according to claim 1, which is characterized in that: two parallel rails are fixedly arranged on the top surface of the moving platform, the direction of the rails is the same as the length direction of the moving platform, and the base is in sliding fit with the two rails.

6. The system for mining, filling and reserving integrated fully-mechanized gangue filling working surface according to claim 5, characterized in that: and the moving platform is fixedly provided with a traction motor which can drive the base to slide along the two tracks.

7. The system for mining, filling and reserving integrated fully-mechanized gangue filling working surface according to claim 1, which is characterized in that: the front end of self-propelled cavity slip casting stock is provided with alloy drill bit and precession screw thread, just the alloy drill bit is than the precession screw thread leans on forward, be provided with a plurality of slip casting mouths on the body of rod of self-propelled cavity slip casting stock.