CN112746846A - Non-settling coal mining method and device for mining and filling parallel with ground directional long drill hole - Google Patents
Non-settling coal mining method and device for mining and filling parallel with ground directional long drill hole Download PDFInfo
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- CN112746846A CN112746846A CN202110163120.3A CN202110163120A CN112746846A CN 112746846 A CN112746846 A CN 112746846A CN 202110163120 A CN202110163120 A CN 202110163120A CN 112746846 A CN112746846 A CN 112746846A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
Abstract
The invention discloses a non-sedimentation coal mining method and a non-sedimentation coal mining device for mining and filling parallel with a ground directional long drill hole, wherein the drilling of the ground directional long drill hole is completed in a layer above a coal seam roof; drilling side branch holes in the filling subsection; starting working face stoping until the working face moves to the boundary of the current filling subsection and the next filling subsection, and in the stoping process of the working face, when the goaf is pushed to the side branch hole at the current filling subsection to be exposed, starting grouting from the ground directional long drill hole and the side branch hole at the current filling subsection to the current goaf; and (3) completely filling the slurry in the current goaf, waiting for the slurry to solidify, drilling a side branch hole at the next filling subsection in the process of waiting for the slurry to solidify, and repeating the process until the mining and filling of the whole working face are completed. The method effectively avoids the problems of serious mining and filling interference, complex working procedures, complex pipelines, small equipment capacity, limited mining strength, high construction cost and the like caused by the existing underground filling technology.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a ground directional long-drill-hole mining and filling parallel non-sedimentation coal mining method and device.
Background
Coal occupies the main energy status of China for a long time, comprehensive mechanical mining becomes the main mining mode of key coal mining areas of China, and the roof is mainly processed by natural caving. The problems of mining area ground surface settlement, environmental damage, water resource loss, roof dynamic disaster, overlaying resource loss and the like caused by the damage of the overlying strata of the coal bed caused by the long-wall fully-mechanized mining at present seriously restrict the efficient and safe green mining of coal resources, and the contradiction between the coal mining and the production safety, the environmental protection and the full development of resources is more and more prominent. With the continuous promotion of policies such as ecological civilization construction, safe production reformation development and the like in the center, high-quality development becomes a necessary requirement for the development of the coal industry. The method is a key ring about the high-quality development of coal and is used for preventing and treating a series of problems caused by overlying rock stratum settlement of the goaf. Therefore, the development of the filling type mining technology is brought, and the problem of top plate settlement of the goaf is relieved to a certain extent.
However, the existing filling type mining mainly adopts a 'series connection' mode, namely, the stoping is stopped after a certain distance of the stoping, the filling operation is started, the stoping is continued after a filling body is solidified, the stoping is repeated in the way, or after an overlying rock stratum falls and settles to a certain extent, grouting and filling are carried out in a fracture space; the filling slurry is distributed underground or on the ground and is conveyed through conveying pipelines arranged on a roadway and a working surface. The biggest problems brought by the method are that the mining and filling efficiency is low, the process interference is serious, the yield is low, the method cannot adapt to the high-strength mining requirement represented by long-wall fully-mechanized mining, underground roadways and working face pipelines are complex, the connection difficulty is high, the process is complex, the grouting equipment capacity is difficult to exert due to underground space limitation, the method is mostly applied to local filling of key areas, the whole is difficult to be taken as a target, and the problems of mining area ground surface settlement, environmental damage, water resource loss, roof power disaster, overlaying resource loss and the like are limited.
Therefore, development of a coal mining technology suitable for parallel mining and filling and sufficient filling represented by a longwall fully mechanized mining face is urgently needed.
Disclosure of Invention
In order to solve the problems, the invention provides a non-sedimentation coal mining method and a non-sedimentation coal mining device for mining and filling parallel with directional long drill holes on the ground, which solve the problems of surface subsidence, water resource loss, environmental damage, frequent mine disasters, sharp increase of mining cost, low work efficiency of the existing underground filling technology, low mine productivity and difficulty in meeting the mechanical mining strength caused by insufficient filling of the existing filling mode.
In order to solve the technical problems, the invention adopts the following technical scheme:
a non-sedimentation coal mining method for mining and filling parallel in a ground directional long drill hole comprises the following steps:
step 3, drilling a side branch hole at the current filling subsection, wherein one end of the side branch hole is communicated with the horizontal section eyelet of the ground directional long drilling hole, and the other end of the side branch hole extends to the coal seam;
in the working face stoping process, after the goaf is pushed to the side branch hole in the current filling subsection to be exposed, grouting is started to the current goaf from the ground directional long drill hole and the side branch hole at the current filling subsection;
and 6, repeating the steps 3 to 5 until the mining and filling of the whole working face are completed.
Preferably, in the step 4, the time period for stopping the extraction of the working face is set to be within the time period for overhauling the equipment by the overhaul team.
Specifically, the end face of the goaf is sealed through the sealing mechanism, so that the goaf on one side of the sealing mechanism and the coal mining area on the other side of the sealing mechanism are divided into two spaces.
The invention also discloses a fully mechanized mining working face goaf filling device, which comprises a ground directional long drill hole arranged in a rock stratum above a coal seam, a plurality of side branch holes and a sealing mechanism for sealing the fully mechanized mining working face; the horizontal section of the ground directional long drill hole extends along the trend of the fully mechanized coal mining face; one end of the side branch hole is communicated with the horizontal section, and the other end of the side branch hole extends to the coal bed; the distance between the adjacent side branch holes is smaller than the preliminary pressing step distance.
Specifically, the sealing mechanism is a curtain baffle mechanism, and the curtain baffle mechanism comprises a roller, a curtain wound on the roller, a roller support, a support body for supporting the curtain and a cutting piece for cutting the curtain; the roller is supported on the roller support, the support body can stretch out and draw back, the roller is arranged at the top of the support body, and one end of the curtain is lapped on the roller; the cutting piece is arranged on the supporting body and faces the goaf direction.
Specifically, the sealing mechanism is a folding type enclosure mechanism, and the folding type enclosure mechanism comprises a folding annular support body and a bag body; the bag body is provided with an opening for injecting slurry and is arranged in the inner cavity of the annular support body; slurry flow openings are formed in the annular supporting body and the bag body.
More specifically, the annular support body is formed by sequentially assembling a plurality of grid sheets along the circumferential direction, and any two grid sheets can relatively rotate by taking a connecting shaft of the two grid sheets as a center; the annular support body is internally provided with an elastic telescopic piece and a rigid tensioning piece, two ends of the elastic telescopic piece and two ends of the rigid tensioning piece are respectively connected to different connecting shafts, and the elastic telescopic piece and the rigid tensioning piece are sequentially arranged in parallel and are arranged at intervals.
Furthermore, the device also comprises a grouting detection system for detecting the grouting condition, wherein the grouting detection system is arranged near a side branch of the coal seam roof or at the top of the sealing mechanism.
Further, the device also comprises a grouting system for orienting grouting in the long drilling hole to the ground.
The invention also discloses a non-settling coal mining device for mining and filling parallel of the ground directional long drill hole, which comprises a coal mining machine, a hydraulic support and the fully mechanized coal mining face goaf filling device recorded in the invention; the sealing mechanism is arranged on one side, close to the goaf, behind the hydraulic support.
Compared with the prior art, the invention has the beneficial effects that:
the invention realizes the parallel-mode stoping and grouting filling replacing processes of the fully mechanized coal face, can not interfere with the coal mining process compared with the existing filling mining, adopts the ground directional long drill hole as the slurry conveying channel, and effectively avoids the problems of serious mining and filling interference, complex process, complex pipeline, small equipment capacity, limited mining strength, high construction cost and the like caused by the existing underground filling technology; compared with caving mining, the goaf can be fully filled, gas accumulation, roof caving and overlying strata settlement are prevented, and therefore the problems of mine local gas accumulation, rock burst, water filling and other disasters, surface subsidence, water resource loss, surface ecological environment damage, ground building damage and the like caused by coal mining are effectively solved; the high-efficiency and high-yield mining requirement of a modern large working face can be met.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
FIG. 1 is an overall flow diagram of the coal mining method of the present invention.
Fig. 2 is a schematic diagram of the gob filling apparatus of the fully mechanized mining face of the present invention.
Fig. 3 is a schematic diagram of the arrangement of the horizontal well group shown in the embodiment of the invention.
Figure 4 is a schematic view of the curtain enclosure mechanism of the present invention.
Fig. 5 is a schematic view of the folding enclosure mechanism of the present invention in a folded state.
Fig. 6 is a schematic view of the folded enclosure mechanism of the present invention in an unfolded state.
Fig. 7 is a schematic diagram of the first filling subsection stoping in embodiment 1 of the present invention.
FIG. 8 is a schematic representation of the continued recovery of the pack of example 1 of the present invention after solidification.
Fig. 9 is a schematic diagram of the first filling subsection stoping of embodiment 2 of the present invention.
FIG. 10 is a schematic view of example 2 of the present invention waiting for the filler to solidify.
FIG. 11 is a schematic representation of the continued recovery of the pack of example 2 of the present invention after solidification.
The reference numerals in the figures denote:
1-directional long ground drilling, 2-side branch holes, 3-curtain enclosure mechanisms, 4-folding enclosure mechanisms, 5-a grouting system, 6-a coal mining machine, 7-a hydraulic support, 8-a rock stratum, 9-a coal bed and 10-a filling body;
11-horizontal segment, 12-filling segment boundary;
31-roller, 32-cutting curtain, 33-roller support, 34-support, 35-cutting member, 36-roller;
331-supporting frame, 332-movable base, 333-supporting roller;
41-annular support body, 42-slurry flow port;
411-grid sheet, 412-connecting shaft, 413-elastic expansion piece and 414-rigid tension piece.
The details of the present invention are explained in further detail below with reference to the drawings and the detailed description.
Detailed Description
In the present invention, unless otherwise specified, the use of the terms of orientation such as "upper, lower, bottom, top" and "lower" generally refer to the definition in the drawing plane of the corresponding drawing, and "inner and outer" refer to the definition in the drawing plane of the corresponding drawing.
The invention discloses a non-sedimentation coal mining method for mining and filling parallel with ground directional long drill holes, which comprises the following steps:
In the invention, directional long drilling hole distribution positions, the number of well groups, the spacing between side branches, ground grouting equipment model selection, pipeline connection, grouting material proportion and the like are designed in advance.
In the invention, the directional long drill hole is arranged in a stable rock stratum in order to avoid collapse of the rock stratum in the drilling process.
In the invention, the ground directional long drill hole is used as a main filling and grouting channel and is influenced by the water-to-vertical ratio and limited by the drilling technology, if the horizontal section of the ground directional long drill hole is difficult to cover the whole operation surface, a plurality of ground directional long drill holes can be drilled in the extending direction of the horizontal section for replacing, so that the whole operation surface is covered by the horizontal section of the directional long drill holes, and the control range of the main grouting channel is ensured.
Step 3, drilling a side branch hole at the current filling subsection, wherein one end of the side branch hole is communicated with the horizontal section eyelet of the ground directional long drilling hole, and the other end of the side branch hole extends to the coal seam;
in the working face stoping process, after the goaf is pushed to the side branch hole in the current filling subsection to be exposed, grouting is started to the current goaf from the ground directional long drill hole and the side branch hole at the current filling subsection; and grouting can be started when the goaf advances to the boundary between the current filling section and the next filling section.
In the invention, the sealing mechanism is used for sealing the section of the goaf during grouting, so that the goaf on one side of the sealing mechanism and the coal mining area on the other side of the sealing mechanism are divided into two independent spaces. The sealing mechanism of the present invention can adopt the existing devices which are available on the market and can seal the roadway section, but two sealing mechanisms, namely a curtain enclosure mechanism and a folding enclosure mechanism, are preferably provided below the present invention.
In the process of waiting for the slurry to solidify, drilling a side branch hole at the next filling subsection, preferably setting the time period of stopping the stoping of the working face within the time period of overhauling equipment by an overhaul team, and having no interference to the coal mining operation. Meanwhile, the slurry filler completes final setting before the top plate is pressed.
And 6, repeating the steps 3 to 5 until the mining and filling of the whole working face are completed.
The invention also discloses a fully mechanized coal mining face goaf filling device, which comprises a ground directional long drill hole 1 arranged in a rock stratum 8 above a coal seam, a plurality of side branch holes 2 and a sealing mechanism for sealing the fully mechanized coal mining face, wherein the sealing mechanism is used for preventing slurry in the goaf from flowing to the coal mining side. The horizontal section 11 of the ground directional long drill hole 1 extends along the trend of the fully mechanized mining face, one end of the side branch hole 2 is communicated with the horizontal section 11, and the other end of the side branch hole extends to a coal seam; it should be noted that the pitch of the adjacent side branch holes 2 should be smaller than the preliminary press pitch.
The sealing mechanism of the present invention may employ any of the devices available on the market that are capable of sealing roadway sections, but preferably the two sealing mechanisms of the present invention are given below.
The first sealing mechanism of the present invention is a curtain barrier mechanism 3, and as shown in fig. 4, the curtain barrier mechanism 3 includes a drum 31, a curtain 32 wound around the drum 31, a drum support 33, a support body 34 for supporting the curtain 32, and a cutter 35 for cutting the curtain 32. The roller 31 is supported on the roller support 33, the support 34 can be extended and retracted, the roller 36 is arranged at the top of the support 34, and the roller 36 at the top of the extended support 34 can be pushed against the top of the roadway. One end of the curtain 32 is overlapped on the roller 36, and the curtain 32 is gradually dropped toward the gob by the rolling of the roller 31 and the roller 36. The cutting piece 35 is arranged on the supporting body 34, the cutting piece 35 faces the direction of the goaf, and after the grouting of the current filling section is completed and the initial setting of the slurry has certain strength, the curtain 32 is cut through the cutting piece 35, and the curtain barrier mechanism 3 continues to move forwards along with the hydraulic support.
As a preferred embodiment of the present invention, the drum support 33 includes a support frame 331, a movable base 332, and two supporting rollers 333, the movable base 332 is movably coupled to the support frame 331, the two supporting rollers 333 are coupled to the movable base 332, and the supporting rollers 333 are capable of rotating, and the drum 31 on which the curtain 32 is wound is placed on the two supporting rollers 333. The supporting frame 331 is connected to the hydraulic support 7, and the movable base 332 can slide on the supporting frame 331 to compensate for the displacement distance between two adjacent hydraulic supports, so as to prevent the roller 31 from deforming and breaking due to the displacement between the hydraulic supports, and to ensure that the roller is parallel to the working surface.
In order to further ensure the sealing performance of the contact surface of the curtain 32 and the coal mine tunnel wall, a filling agent or a sealing glue is expanded at the contact surface for sealing.
The second sealing mechanism of the present invention is a folding enclosure mechanism 4, as shown in fig. 5, the folding enclosure mechanism 4 includes a folding ring-shaped support 41 and a bag body (not shown), wherein the bag body is made of a soft material and is impermeable to grout, such as plastic cloth. The capsule body is provided with an opening for injecting the grout and is arranged in the inner cavity of the annular support body 41. As a preferable scheme of the invention, only the opening of the capsule is required to be tightly attached to the periphery of the top of the annular support body 41, other parts of the capsule can be freely placed in the annular support body 41, and when slurry is injected, the capsule is gradually expanded under the pressure of the slurry. The annular support body 41 and the bag body are both provided with a slurry flowing port 42, which is convenient to communicate with the inner cavity of the adjacent annular support body 41 for slurry flowing.
As a preferred embodiment of the present invention, the ring-shaped supporting body 41 is formed by sequentially assembling a plurality of grid sheets 411 along the circumferential direction, and any two grid sheets 411 can relatively rotate around the connecting shaft 412 thereof; the grid openings in the grid sheet 411 now form the slurry flow openings 42 in the annular support 41. An elastic expansion piece 413 and a rigid tension piece 414 are supported in the annular support body 41, the elastic expansion piece 413 is a rod piece made of a deformable material such as a flexible cable, the rigid tension piece 414 is a rigid support rod, two ends of the elastic expansion piece 413 and two ends of the rigid tension piece 414 are connected to different connecting shafts 412 respectively, and the elastic expansion piece 413 and the rigid tension piece 414 are arranged in parallel and at intervals in sequence, as shown in fig. 6.
In one embodiment of the present invention, the ring support 41 is a square shape, four sides are all wire frames, two ends of the elastic expansion member 413 and two ends of the rigid tension member 414 are respectively connected to two opposite connecting shafts 412, and a rectangular container is formed as the elastic expansion member 413 expands.
In order to effectively obtain the grouting condition of the goaf, a grouting detection system is arranged near a lateral branch of the top of the roadway or at the top of a sealing mechanism.
In the invention, a grouting system 5 is installed on the ground, and grouting is carried out in the directional long drill hole 1 on the ground through the grouting system 5.
The invention also discloses a non-settling coal mining device for parallel mining and filling of the directional long drill hole on the ground, which comprises a coal mining machine 6, a hydraulic support 7 and the fully mechanized coal mining face goaf filling device recorded in the invention.
It should be noted that the present invention is not limited to the above embodiments, and all equivalent changes based on the technical solutions of the present application fall into the protection scope of the present invention.
Specific coal mining cases when different sealing mechanisms are adopted in the invention are given below, and in the following examples, the non-settling coal mining device described in the invention is used for coal mining.
Example 1
The ground directional long-drilling mining and filling parallel non-settlement coal mining method of the embodiment adopts the curtain enclosure mechanism 3 as a working surface section sealing mechanism, and the specific method comprises the following steps:
dividing the fully mechanized mining face into a plurality of filling sections, namely a filling section 1, a filling section 2, a filling section 3, a filling section … … and a filling section n; according to the ground grouting system and the capacity of drilling equipment, m directional long drilling holes are designed, the length of the horizontal section of each horizontal hole is 600-1500 m, and the length of a working face is 1-3 Km, so that m/2 horizontal holes can be designed as continuous holes of the other m/2 horizontal holes, namely, the horizontal sections extend in the same direction or opposite directions to ensure that the horizontal sections of the horizontal holes cover the whole working face; carry out the research of thick liquid prescription through the laboratory, design thick liquid initial set time is greater than filling the fill time, can reach design intensity before the roof plate comes to press. Selecting rapid-hardening slurry with good circulation, and performing parallel grouting on the orifice of each horizontal hole by adopting a plurality of large-displacement grouting pumps;
and (4) building a grouting system near the ground well group according to the terrain conditions. Building a material storage system, which comprises a filling material aggregate, water, an accelerating agent, an expanding agent storage bin and an aggregate crushing bin; a pump injection system, a material-containing mixing bin, a grouting pump set and the like.
And 2, completing ground directional long drilling in a stable rock stratum on a coal seam top plate before installation and coal mining of working face coal mining equipment, using the ground directional long drilling as a filling and grouting main channel, enabling horizontal sections of all wells of the well group to be parallelly and equidistantly distributed along the direction of the working face, and drilling a side branch hole group at the designed first side branch hole group position to serve as a filling material conveying channel.
And 3, after the earlier stage work is finished, the fully mechanized coal mining face starts to carry out stoping. The roller 31 is placed on the supporting roller 333 during the extraction process, and the movable base 332 can slide on the supporting frame 331 during the extraction process to compensate the dislocation distance between the adjacent hydraulic supports, so as to avoid the deformation and the breakage of the curtain roller due to the dislocation between the hydraulic supports, and simultaneously ensure that the curtain roller is parallel to the working surface;
when the recovery approaches the boundary of the 1 st filling section, the roller 31 is started to rotate, and the curtain 32 starts to be laid; the front end of the curtain 32 is paved on the bottom plate of the goaf.
And 4, finishing the laying of the curtain 32 when the overhaul team begins to overhaul the equipment, sealing the curtain 32 and the wall surface of the roadway by using an expansion filling agent or a sealant, moving the support 34 upwards to seal the gob, and beginning grouting through the directional long drill hole group.
And 5, evaluating the filling condition through a goaf sensor during grouting, coordinating a ground grouting system to ensure the filling volume, and finishing the filling and initial setting of the 1 st filling section within the overhaul period and having certain strength. Meanwhile, directional long drilling hole sweeping operation is carried out in the waiting setting period, and the 2 nd branch hole group is drilled. As shown in fig. 7 and 8.
and 7, continuing to recover the coal bed while developing in the step 6, and sequentially executing the steps 3 to 6 to finish the 2 nd filling and sectional recovery and filling.
And 8, repeating the steps, and completing the 3 rd, 4 th, … … th and n-th section mining and filling in sequence.
The embodiment can also continuously perform surface subsidence observation, three-zone well observation, hydrological well observation and microseismic event monitoring through the mining influence monitoring system in the mining and filling parallel process, and comprehensively analyze the goaf filling effect of the fully mechanized coal mining face.
Example 2
The non-settlement coal mining method with parallel mining and filling of the directional long drill hole on the ground adopts a folding type enclosure mechanism 4 as a working surface section sealing mechanism, and the specific method comprises the following steps:
and (4) building a grouting system near the ground well group according to the terrain conditions. Building a material storage system, which comprises a filling material (aggregate, water, an accelerating agent and an expanding agent) storage bin and an aggregate crushing bin; a pump injection system, a material-containing mixing bin, a grouting pump set and the like.
And 2, installing coal mining equipment, operating the hydraulic support to enable the hydraulic support to move close to the support mechanism of the goaf, and supporting the goaf 1-2m behind the mining support so as to conveniently install and connect the folding type enclosure mechanism. Fixing the grid sheet 411 at one end of the folding enclosure on the wall surface of the incision through a fixing structure (such as an anchor rod, an iron chain and the like), and fixing the other end of the folding enclosure on the hydraulic support 7; meanwhile, the ground directional long drilling is completed in the rock stratum 8 of the coal seam roof to be used as a main filling and grouting channel, so that the horizontal sections of all wells of the well group are parallelly and equidistantly distributed along the direction of the working surface, and meanwhile, the branch hole group is drilled at the designed first side branch hole group position to be used as a filling material conveying channel.
And 4, after the preparation work is finished, the fully mechanized coal mining face starts to carry out mining. In the extraction process, the folding enclosure is gradually expanded by the tension between the wall surface of the incision and the hydraulic support, and the elastic expansion piece 413 on the annular support body 41 starts to act to enable the opening of the bag body to be close to the top plate and simultaneously connect the slurry flowing port 42 of the adjacent folding enclosure.
and during grouting, the filling condition is detected through a goaf sensor, and a ground grouting system is coordinated to ensure the filling volume.
And 7, continuing to recover after the equipment maintenance is finished, simultaneously starting to release the folding type enclosure mechanism 4 of the second filling section, and sequentially executing the steps 4 to 6 to finish the filling of the second filling section.
And 8, repeating the steps until the mining and filling of the whole working face are completed.
Table 1 below shows the comparison of the effect of the method of the above example, the conventional filling method and the conventional caving mining method in a mine in the northwest region.
TABLE 1 comparison of the effects of different mining methods
The filling mining method has social benefits and environmental benefits relative to the collapse type mining, has obvious economic benefits relative to the cloth bag type filling mining, does not influence the normal mining of the coal mine, is suitable for the existing national conditions, and can meet the coal mining requirements.
In the above description, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be understood broadly, and may be, for example, fixedly connected or detachably connected or integrated; either a direct connection or an indirect connection, and the like. The specific meaning of the above terms in the present technical solution can be understood by those of ordinary skill in the art according to specific situations.
The respective specific technical features described in the above-described embodiments may be combined in any suitable manner without contradiction as long as they do not depart from the gist of the present invention, and should also be regarded as being disclosed in the present invention.
Claims (10)
1. A non-sedimentation coal mining method for mining and filling parallel in a ground directional long drill hole is characterized by comprising the following steps:
step 1, dividing a fully mechanized mining face into a plurality of filling subsections along the direction of the face, wherein the length of each filling subsection is smaller than a preliminary pressure step pitch;
step 2, completing the directional long drilling on the ground in the rock stratum above the coal seam roof; the horizontal section of the ground directional long drill hole extends along the direction of the working surface;
step 3, drilling a side branch hole at the current filling subsection, wherein one end of the side branch hole is communicated with the horizontal section eyelet of the ground directional long drilling hole, and the other end of the side branch hole extends to the coal seam;
step 4, starting working face stoping until the working face moves to the boundary of the current filling subsection and the next filling subsection, stopping working face stoping, and performing step 5;
in the working face stoping process, after the goaf is pushed to the side branch hole in the current filling subsection to be exposed, grouting is started to the current goaf from the ground directional long drill hole and the side branch hole at the current filling subsection;
step 5, if the slurry is completely filled in the current goaf, and after the slurry is solidified, performing step 4; if the current goaf is not completely filled, continuing to fill until the current goaf is completely filled with slurry and waiting for the slurry to solidify, and performing the step 4; drilling a side branch hole at the next filling subsection in the process of waiting for the slurry to solidify;
and 6, repeating the steps 3 to 5 until the mining and filling of the whole working face are completed.
2. The method of claim 1, wherein in step 4, the period of stopping face extraction is set within the period of servicing the equipment by the service team.
3. The ground directional long-borehole mining and charging parallel non-sedimentation coal mining method according to claim 1, characterized in that the sealing mechanism seals the end face of the goaf to divide the goaf on one side of the sealing mechanism and the coal mining area on the other side into two spaces.
4. The fully mechanized mining working face goaf filling device is characterized by comprising a ground directional long drill hole (1) arranged in a rock stratum (8) above a coal seam, a plurality of side branch holes (2) and a sealing mechanism for sealing the fully mechanized mining working face;
the horizontal section (11) of the ground directional long drill hole (1) extends along the trend of the fully mechanized coal mining face; one end of the side branch hole (2) is communicated with the horizontal section (11), and the other end of the side branch hole extends to a coal seam; the distance between the adjacent side branch holes (2) is smaller than the preliminary pressing step distance.
5. A fully mechanized mining face gob filling apparatus according to claim 1, characterized in that the sealing mechanism is a curtain enclosure mechanism (3), the curtain enclosure mechanism (3) comprising a drum (31), a curtain (32) wound on the drum (31), a drum support (33), a support body (34) for supporting the curtain (32), and a cutter (35) for cutting the curtain (32);
the roller (31) is supported on a roller support (33), the support body (34) can stretch and retract, a roller (36) is arranged at the top of the support body (34), and one end of the curtain (32) is lapped on the roller (36); the cutting piece (35) is arranged on the supporting body (34), and the cutting piece (35) faces the goaf direction.
6. A fully mechanized mining face gob filling apparatus according to claim 1, wherein the sealing mechanism is a folding fence mechanism (4), the folding fence mechanism (4) comprising a foldable ring support (41) and a bladder; the capsule body is provided with an opening for injecting slurry and is arranged in the inner cavity of the annular support body (41); and the annular supporting body (41) and the capsule body are both provided with a slurry flow port (42).
7. The fully mechanized mining face gob filling apparatus according to claim 6, wherein the annular support body (41) is formed by sequentially assembling a plurality of mesh sheets (411) in a circumferential direction, and any two mesh sheets (411) can relatively rotate around a connecting shaft (412) thereof; the annular support body (41) is internally provided with an elastic expansion piece (413) and a rigid tension piece (414), two ends of the elastic expansion piece (413) and two ends of the rigid tension piece (414) are respectively connected to different connecting shafts (412), and the elastic expansion piece (413) and the rigid tension piece (414) are sequentially arranged in parallel at intervals.
8. The fully mechanized mining face gob filling apparatus of claim 1, further comprising a grouting detection system for detecting a grouting condition, the grouting detection system being disposed adjacent to a side branch of the coal seam roof or uppermost of the sealing mechanism.
9. A device for filling a goaf in a fully mechanized mining face according to claim 1, characterized by a grouting system (5) for grouting into a long borehole (1) oriented towards the ground.
10. A non-settling coal mining device for parallel mining and filling of a directional long borehole on the ground, comprising a coal mining machine (6) and a hydraulic support (7), characterized by further comprising a fully mechanized coal mining face goaf filling device according to any one of claims 4 to 9; the sealing mechanism is arranged on one side, close to the goaf, behind the hydraulic support (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110163120.3A CN112746846B (en) | 2021-02-05 | 2021-02-05 | Non-settling coal mining method and device for mining and filling parallel with ground directional long drill hole |
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| CN114247331A (en) * | 2022-01-19 | 2022-03-29 | 中煤科工集团西安研究院有限公司 | Top plate horizontal well tail end double-material mixing device and system and filling-following solidification method |
| CN114278344A (en) * | 2021-12-27 | 2022-04-05 | 安徽理工大学 | Water spraying control method for separated layer crushing roof of tunneling roadway |
| CN114483175A (en) * | 2022-02-14 | 2022-05-13 | 河北地质大学 | A filling equipment for preventing mine collecting space area subsides |
| WO2023168109A1 (en) * | 2022-03-04 | 2023-09-07 | The Mosaic Company | Miner automated hardware installation system and automated brattice installer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114278344A (en) * | 2021-12-27 | 2022-04-05 | 安徽理工大学 | Water spraying control method for separated layer crushing roof of tunneling roadway |
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| WO2023168109A1 (en) * | 2022-03-04 | 2023-09-07 | The Mosaic Company | Miner automated hardware installation system and automated brattice installer |
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