CN111997549A - Core separation box for coal mine underground hydraulic reverse circulation continuous coring and method thereof - Google Patents
Core separation box for coal mine underground hydraulic reverse circulation continuous coring and method thereof Download PDFInfo
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- CN111997549A CN111997549A CN202010786802.5A CN202010786802A CN111997549A CN 111997549 A CN111997549 A CN 111997549A CN 202010786802 A CN202010786802 A CN 202010786802A CN 111997549 A CN111997549 A CN 111997549A
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- 239000003245 coal Substances 0.000 title claims abstract description 86
- 238000000926 separation method Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000000605 extraction Methods 0.000 claims abstract description 71
- 239000011435 rock Substances 0.000 claims abstract description 48
- 239000013049 sediment Substances 0.000 claims abstract description 44
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000005553 drilling Methods 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 17
- 230000007727 signaling mechanism Effects 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 238000011010 flushing procedure Methods 0.000 claims abstract description 11
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 19
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 19
- 241001330002 Bambuseae Species 0.000 claims description 19
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 19
- 239000011425 bamboo Substances 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 229910001095 light aluminium alloy Inorganic materials 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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Abstract
A coal mine underground hydraulic reverse circulation continuous coring rock core separation box and a method thereof are provided, the rock core separation box comprises a rock core cabinet, a rock core barrel, a sliding joint, a joint cabinet, a negative pressure extraction box body, a sediment box body and a rock core signaling mechanism, the rock core barrel is inserted in the rock core cabinet, the rock core cabinet is arranged in the negative pressure extraction box body at a certain angle, after the rock core cabinet is connected with a return channel of a coal mine underground reverse circulation coring drilling tool, an upward return coal rock core enters the rock core barrel through the sliding joint, the coal rock core impacts a transmission rod of the rock core signaling mechanism, the signaling mechanism swings to transmit information, coal rock debris and flushing fluid enter the sediment box body through an annular through hole arranged on the rock core barrel, and gas overflowing from the return channel can enter a gas negative pressure extraction pipeline through the negative pressure extraction box body; therefore, the coal core return reporting message, the coal core collection, the gas extraction and the sediment collection are integrated, the structure is simple, the assembly is convenient, the operation is simple, and the underground safe construction of the coal mine is ensured.
Description
Technical Field
The invention relates to the technical field of drilling equipment, in particular to a core separation box for hydraulic reverse circulation continuous coring in a coal mine and a method thereof.
Background
The underground geological abnormal body of the coal mine is a great potential safety hazard for safe production of the coal mine, a fine management mode is implemented gradually along with the coal mine, a higher requirement for accurate detection of structural elements is provided for finding out the geological structure of a coal face, particularly the geological abnormal body and the like in order to avoid unplanned disclosure of the geological structure, and the safe production can be ensured only by finding out in advance. At present, drilling is the most intuitive, effective and accurate technical means, and can be divided into two exploration methods of coreless drilling and coring drilling. The horizontal drilling is mainly used for the tunnel coring drilling, and the coring process mainly comprises three types of drill-lifting coring, rope coring, hydraulic reverse circulation continuous coring (single tube or double tube) and the like. The double-wall hydraulic reverse circulation core-taking technology can realize continuous core-taking without drilling, and has obvious technical advantages, so the double-wall hydraulic reverse circulation continuous core-taking technology is applied to the hydraulic reverse circulation core-taking work of a horizontal hole under a coal mine.
The normal upward return of the coal core is the key of a hydraulic reverse circulation continuous coring technology, and the underground geological information of the coal mine can be intuitively known by collecting, recording, observing and analyzing the upward return coal core, wherein the underground geological information comprises the formation lithology change, the bedding development degree and the development conditions of geological abnormal bodies such as faults, collapse columns and the like. The hydraulic reverse circulation continuous coring technology has wide application prospect in underground coal mines, and the technical principle is that flushing fluid is pumped into a double-wall drill rod through a slurry pump, along with the progress of drilling construction, a complete coal core crushed at the bottom of a hole is continuously carried back to the outside of the hole along a central channel of the drill rod, and then the coal core is subjected to subsequent treatment and analysis.
At present, a matched coal rock core separation box is not arranged under a coal mine, an upward returned coal rock core and crushed coal rock debris are basically directly discharged into a designated box body through a rubber pipe, pressure relief gas escaping from a reverse circulation channel is not collected, and certain potential safety hazards exist. The core is determined whether to be cored or not only by manually observing the core near the core arranging pipe after the construction of a single drill rod is completed, the coal cores need to be manually and uniformly picked out from the box body for editing and recording, the coal cores are mixed together due to the fact that the coal cores continuously return, the sequence of the core return is disordered, the analysis of the subsequent coal cores can be influenced due to the difficulty in collection and editing, the problem of treatment of pressure relief gas in the construction process is considered in the underground construction of the coal mine, and the safe and efficient development of the hydraulic reverse circulation coring construction of the coal mine is ensured.
Therefore, in view of the defects, the designer of the invention researches and designs a core separating box for hydraulic reverse circulation continuous coring in a coal mine and a method thereof by taking the experience and the result of the related industry for years into consideration through careful research and design so as to overcome the defects.
Disclosure of Invention
The invention aims to provide a core separation box for underground hydraulic reverse circulation continuous coring of a coal mine and a method thereof, which have the advantages of simple structure, convenience in operation and capability of overcoming the defects of the prior art, integrates coal core upward return notification, coal core collection, gas extraction and sediment collection, and effectively ensures underground safe construction of the coal mine.
In order to achieve the purpose, the invention discloses a core separation box for hydraulic reverse circulation continuous coring in a coal mine, which comprises a core cabinet, a core barrel, a sliding joint, a joint cabinet, a negative pressure extraction box body, a sediment box body and a core signaling mechanism, and is characterized in that:
the core cabinet and the joint cabinet are all obliquely arranged in the negative pressure extraction box body, the inclination angles of the core cabinets and the joint cabinet are consistent, the sliding joints are multiple and are arranged in the joint cabinet body, the core barrel is arranged in the core cabinet body at multiple detachable intervals, the core cabinet is arranged behind the joint cabinet body, the outer side of the core cabinet body is provided with a handle and is in sliding fit with the negative pressure extraction box body, the front ends of the sliding joints stretch out of the joint cabinet body to be connected to a core discharge pipe at the tail part of a hydraulic reverse circulation continuous core drilling tool, the rear ends of the sliding joints stretch out of the joint cabinet body to be connected to the core barrel in the core cabinet body respectively, the core signaling mechanism is arranged in the negative pressure extraction box body and above the core cabinet body, and the negative pressure extraction box body is arranged on a sediment box body.
Wherein: a plurality of circular through holes are formed in one side wall of the core cabinet at intervals, a plurality of circular small holes are formed in the opposite side wall of the core cabinet corresponding to the circular through holes of the same specification, a bolt and a blocking piece are sleeved in each circular small hole, and the blocking piece can rotate freely in the axial direction of the bolt.
Wherein: the core barrel is a plurality of and the cross-section is for being equipped with the fan-shaped circular arc structure of an upper shed, fan-shaped circular arc structure is equipped with the rectangular channel of longitudinal extension in upper shed both sides, and the both sides that correspond each circular through-hole in the core cabinet are equipped with the rectangle slide rail that parallel extension to on the relative lateral wall, each core barrel peg graft in core cabinet and freely slide on the rectangle slide rail, the interval is equipped with a plurality of annular through-holes on the perisporium of core barrel, core barrel internal surface polishing drag reduction handles, core barrel afterbody is furnished with the end cap, be equipped with multichannel sealing washer on the end cap.
Wherein: the middle part of the joint cabinet is provided with a first rectangular through hole for inserting the sliding joint, the joint cabinet is of a box structure, handles are arranged at two ends of the box structure, the sliding joint is of a box structure with a rectangular cross section, the front end of the sliding joint is provided with a core arranging pipe connected to the tail part of the hydraulic reverse circulation continuous core drilling tool, and the rear end of the sliding joint is provided with a connecting cylinder connected to a core barrel.
Wherein: the outer edges of the upper end wall and the lower end wall of the sliding joint are respectively provided with a limiting plate, the middle part of each limiting plate is provided with a positioning groove, the upper side and the lower side of the first rectangular through hole of the joint cabinet are respectively provided with a plurality of limiting holes corresponding to the positioning grooves, the axis of each limiting hole is in one-to-one correspondence with the axis of the core barrel on the same vertical plane, and the positioning grooves on the limiting plates are matched and fixed with the limiting holes on the joint cabinet through pins.
Wherein: the core barrel is characterized in that second rectangular through holes for the joint cabinets to be inserted are formed in two sides of the front end of the negative pressure extraction box, third rectangular through holes for the core cabinets to be inserted are formed in one side of the middle of the negative pressure extraction box, lower sliding rails for the joint cabinets to move in a guiding mode and supporting blocks for the core cabinets to be placed are arranged in the negative pressure extraction box, the lower sliding rails are matched and guided with lower rectangular grooves formed in the bottom ends of the joint cabinets, a first flange plate is arranged on the upper portion of the negative pressure extraction box, a fourth rectangular through hole for the sliding connectors to expose is formed in the front end of the negative pressure extraction box, a window for the core barrel to be taken out is arranged at the tail end of the negative pressure extraction box, a sealed rubber strip is arranged around the.
Wherein: the sediment box is of a square frame structure with an upper opening, a square baffle is arranged on the upper side of the rear part of the sediment box, and one side of the square baffle extends into the sediment box by a certain depth.
Wherein: the core is reported an information and is constructed rotatable locating in the negative pressure drainage box, core is reported an information and is constructed and be located core section of thick bamboo entrance, core is reported an information and is constructed and contain the main part of rod, transfer line and suggestion pole, the main part of rod is a stock column structure, the transfer line is a plurality of and perpendicular connection to the main part of rod, the quantity and the position of transfer line correspond to each core section of thick bamboo, core is reported an information and is constructed and adopt light aluminum alloy material processing.
Wherein: the utility model discloses a rock core letter press, including the core section of thick bamboo axis, suggestion pole, the core section of thick bamboo axis is equipped with the transmission pole, and the suggestion pole is two and be L type structure, and its one end is connected in order to realize the free rotation of core letter mechanism with the both ends of the body of the main rod, the other end of suggestion pole sets up with the certain angle that staggers of transmission pole, under the free state, the transmission pole top is directional core section of thick bamboo incline direction just inserts certain distance below the core section.
Also discloses a core separation method for coal mine underground hydraulic reverse circulation continuous coring, which is characterized by comprising the following steps:
the method comprises the following steps: after the core separation box is completely assembled, the upper part of a negative pressure extraction box body is connected with a downhole gas negative pressure extraction pipeline, the front end of the sediment box body is connected with a plurality of grading sediment boxes, the side surface of the sediment box body is connected with an orifice positive circulation sediment discharge pipeline, a core discharge pipe at the tail part of a hydraulic reverse circulation continuous core drilling tool is connected with one sliding joint, other sliding joints are closed, the negative pressure extraction tail part seals the window through a sealing plate, the sediment box body is filled with flushing fluid to achieve a water sealing effect, and the core separation box is integrally closed;
step two: opening a gate valve of a negative pressure extraction pipeline, starting reverse circulation coring construction, enabling a coal core and part of coal rock debris to enter a core discharging pipe along a central channel of a coring drilling tool, entering a core barrel corresponding to the core barrel through one of sliding joints, enabling an upward coal core to impact a transmission rod of a core signaling mechanism, enabling the transmission rod to swing around a main rod body so as to drive the prompting rod to swing, playing a role in upward returning signaling of the coal core, enabling flushing fluid and debris to enter a sediment box body through the core barrel, enabling the coal core to reach the bottom end face of the core barrel under the hydraulic carrying effect and sequentially accumulating until the coal core of the core barrel is filled to about 50mm of the lower end of the core signaling mechanism, stopping construction, connecting the core returning pipe to a second sliding joint, plugging the first sliding joint, and continuing to repeat the steps until all core barrels are filled;
step three: closing negative pressure drainage pipeline gate valve, carrying out rock core clearance and collecting, opening the closing plate of negative pressure drainage box afterbody, open in proper order that the core section of thick bamboo corresponds the separation blade of core cabinet afterbody, first core section of thick bamboo is followed under the action of gravity roll-off in the core cabinet will according to the order the coal core in the core section of thick bamboo is shifted over to the rock core case and is collected, is compiled and records the processing, will after handling finishes the core section of thick bamboo inserts the core cabinet to put down the separation blade, put down the closing plate, repeat step two to go up to return coal core and carry out continuous processing.
According to the above contents, the core separation box for the coal mine underground hydraulic reverse circulation continuous coring and the method thereof have the following effects:
1. the core cabinets are obliquely arranged, the inner surface of the core barrel is subjected to resistance reduction treatment, cores can be sequentially arranged in the core barrel according to the core returning sequence, and the core barrel can be directly taken out from a window at the tail of the negative pressure extraction box body, so that the core barrel is convenient to clean, collect and record.
2. Coal rock fragments and flushing fluid can enter the lower sediment box body through the annular through hole in the core barrel, and the coal core is separated from the sediment box body.
3. The core separation box is provided with a core reporting mechanism which can report and remind the normal upward return of the coal core, and is favorable for workers to judge the coring construction state.
4. The core cabinet and the joint cabinet are respectively provided with a handle, so that subsequent cleaning and maintenance are facilitated, the negative pressure extraction box body can be connected with a coal mine underground gas negative pressure extraction pipeline, the whole core separation box is good in airtightness and isolated from outside air, and safe core taking construction is guaranteed.
5. The gas negative pressure extraction, coal-rock core separation, coal-rock core upward return communication and sediment collection are integrated, and the gas negative pressure extraction device has the characteristics of simple structure, convenience in assembly and simplicity in operation, and has a good application value.
The details of the present invention can be obtained from the following description and the attached drawings.
Drawings
FIG. 1 shows a schematic structural diagram of a core separation box for coal mine underground hydraulic reverse circulation continuous coring and a method thereof.
Fig. 2 shows a schematic diagram of a core holder according to the invention.
Fig. 3 shows a right side view of the core holder of the present invention.
Figure 4 shows a schematic view of a core barrel according to the invention.
Figure 5 shows a schematic view of a slip joint according to the invention.
Figure 6 shows a schematic of a splice case of the present invention.
FIG. 7 shows a schematic view of a negative pressure extraction tank of the present invention.
FIG. 8 shows a top view of the negative pressure extraction tank of the present invention.
FIG. 9 shows a cross-sectional view A-A of the negative pressure extraction tank of the present invention.
Fig. 10 shows a schematic view of the sludge box of the present invention.
Fig. 11 shows a schematic diagram of a core reporting mechanism of the present invention.
Fig. 12 shows a side view of a core signaling mechanism of the present invention.
Fig. 13 shows a schematic view of the core signaling mechanism of the present invention in its entirety with a core barrel.
Reference numerals:
1. a core cabinet; 2. a core barrel; 3. a slip joint; 4. a joint cabinet; 5. negative pressure extraction box body; 6. a sediment box body; 7. a core reporting mechanism; 101. a handle; 102. a circular through hole; 103. a rectangular slide rail; 104. a bolt; 105. a baffle plate; 201. an annular through hole; 202. a rectangular groove; 203. a plug; 204. an O-shaped ring; 301. a joint; 302. a limiting plate; 303. positioning a groove; 401. a first rectangular through hole; 402. a lower rectangular groove; 403. a limiting hole; 404. a joint handle; 501. a second rectangular through hole; 502. a lower rectangular slide rail; 503. a support block; 504. a third rectangular through hole; 505. a window; 506. a fourth rectangular through hole; 507. a first flange plate; 508. a lower baffle plate; 509. sealing the rubber strip; 510. a sealing plate; 511. a small circular hole; 601. a second flange plate; 602. a third flange plate; 603. a square baffle plate; 701. a main rod body; 702. a transmission rod; 703. and a prompting rod.
Detailed Description
In order to make the objects, technical features and technical effects of the technical solutions of the present invention more clear, an exemplary solution of the embodiments of the present invention will be described below in detail and completely with reference to the accompanying drawings of the specific embodiments of the present invention.
The core separation box for the coal mine underground hydraulic reverse circulation continuous coring provided by the embodiment of the invention can comprise a core cabinet 1, a core barrel 2, a sliding joint 3, a joint cabinet 4, a negative pressure extraction box body 5, a sediment box body 6 and a core signaling mechanism 7 as shown in figures 1-13, wherein the core cabinet 1 and the joint cabinet 4 can be drawn out and arranged in the negative pressure extraction box body 5, the sliding joint 3 is arranged in the joint cabinet 4, the core barrels 2 are arranged in the core cabinet 1 at intervals and can be detached, the core signaling mechanism 7 is arranged in the negative pressure extraction box body 5, and the negative pressure extraction box body 5 is arranged on the sediment box body 6 as shown in figure 1-13.
As shown in fig. 2 to 3, in one preferred embodiment, the core cabinet 1 is a box-type cabinet body structure with an upper opening, a plurality of (preferably 4) circular through holes 102 are formed in one side wall of the core cabinet 1 at intervals, rectangular slide rails 103 extending in parallel to opposite side walls are arranged on two sides of the core cabinet 1 corresponding to the circular through holes 102, the rectangular slide rails 103 are preferably connected with the core cabinet 1 in a welding manner, a plurality of (preferably 4) circular small holes are formed in the core cabinet 1 corresponding to the upper ends of the circular through holes 102 on the opposite side walls, bolts 104 and blocking pieces 105 are sleeved in the circular small holes, and the blocking pieces 105 can freely rotate around the bolts 104 in the axial direction.
As shown in fig. 1 to 3, the core box 1 is arranged in the negative pressure extraction box at an oblique angle of 30 degrees, one side of an inlet of the core box 1 (i.e., the side provided with the circular through hole 102) is at a high position, and a handle 101 is arranged on the outer side of the core box 1, so that the core box 1 can be conveniently and movably extracted from and put into the negative pressure extraction box 5.
As shown in fig. 1 to 4, the core barrel 2 is a plurality of fan-shaped arc structures with an upper opening in cross section, the fan-shaped arc structures are provided with longitudinally extending rectangular grooves 202 on two sides of the upper opening, the external profile of the rectangular grooves 202 is consistent with the profile of the rectangular slide rail 103 in the core box, so that the core barrel 2 is arranged corresponding to each circular through hole 102, each core barrel 2 is inserted and matched with the core cabinet 1 and can freely slide on the rectangular slide rail 103, a plurality of annular through holes 201 are arranged on the circumferential wall of the core barrel at intervals for discharging coal debris and flushing fluid into the sediment box 6, the tail of the core barrel 2 is provided with a plug 203, and two O-rings 204 are arranged on the plug 203.
As shown in fig. 1 and 4, in one preferred embodiment, 4 core barrels 2 are arranged in the core holder 1, the axial distance between each core barrel 4 is the same, and the inner surfaces of the core barrels 4 are subjected to polishing and drag reduction treatment.
As shown in fig. 1 and 6, the joint cabinet 4 is of a box-type structure and is arranged in the negative pressure extraction box at an oblique angle of 30 degrees, joint handles 404 are arranged on two outer sides of the joint cabinet to be conveniently inserted and matched in the negative pressure extraction box 5, first rectangular through holes 401 for inserting and fixing the sliding joints 3 are respectively arranged on the front end wall and the rear end wall of the joint cabinet 4, and a plurality of (preferably 4) sliding joints 3 can be inserted into the joint cabinet 4 to be respectively matched with the core barrels 2.
As shown in fig. 1 and 5, the sliding joint 3 is a box structure with a rectangular cross section, the front end of the sliding joint is provided with a joint 301 to be connected to a core array pipe at the tail of the hydraulic reverse circulation continuous core drill, and the rear end of the sliding joint is provided with a connecting cylinder connected to the core barrel 2, so that the box structure with the rectangular cross section can be used for inserting a plurality of sliding joints 3 into the first rectangular through holes 401 in a mutually contacted and matched manner without other connecting structures, thereby effectively saving space and improving use efficiency.
The outer edges of the upper end wall and the lower end wall of the sliding joint are respectively provided with a limiting plate 302, the middle part of each limiting plate 302 is provided with a positioning groove 303, the upper side and the lower side of the first rectangular through hole 401 of the joint cabinet 4 are respectively provided with a plurality of limiting holes 403 corresponding to the positioning grooves 303, and the axes of the limiting holes 403 are in one-to-one correspondence with the axes of the core barrel 2 on the same vertical plane. Therefore, after the sliding joint 3 is inserted into the first rectangular through hole 401, the positioning groove 303 on the limiting plate 302 is matched and fixed with the limiting hole 403 on the joint cabinet 4 through a pin, and the sliding joint 3 can be provided with a protective cap.
As shown in fig. 1 and 7-9, two sides of the front end of the negative pressure extraction box 5 are provided with a second rectangular through hole 501 for the connection cabinet 4 to be connected in an inserting manner, one side of the middle part is provided with a third rectangular through hole 504 for the core cabinet 1 to be connected in an inserting manner, a lower slide rail 502 for guiding the joint cabinet 4 to move and a supporting block 503 for arranging the core cabinet 1 are arranged in the negative pressure extraction box body 5, the two supporting blocks 503 can be respectively supported at the lower edges of the two ends of the core cabinet 1, the lower slide rail 502 is guided in cooperation with the lower rectangular groove 402 arranged at the bottom end of the joint cabinet 4, the upper portion of the negative pressure extraction box body 5 is provided with a first flange 507, the tail end of the negative pressure extraction box body is provided with a window 505 for taking out the core barrel 2, the front end of the negative pressure extraction box body is provided with a fourth rectangular through hole 506 for exposing the sliding joint 3, sealing rubber strips 509 are arranged around the window 505, and the upper end of the window 505 is hinged with a sealing plate 510 capable of opening and closing the window 505.
As shown in fig. 1 and 10, the sediment box 6 is a square frame structure with an upper opening, a square baffle 603 is arranged on the upper side of the rear part of the sediment box, one side of the square baffle 603 is slightly longer and extends into the sediment box 6 to a certain depth, the depth is preferably 30mm, and the negative pressure extraction box 5 is connected with the square baffle 603 on the upper part of the sediment box 6 in a welding manner.
As shown in fig. 1, 11 and 13, the core reporting mechanism 7 is rotatably disposed in the negative pressure extraction box 5, the core reporting mechanism 7 is located at an inlet of the core barrel 2, small round holes 511 are disposed on two sides of the negative pressure extraction box 5 behind the second rectangular through hole 501, so that two ends of the core reporting mechanism 7 are fixed and can freely rotate, the core reporting mechanism 7 includes a main rod body 701, transmission rods 702 and prompting rods 703, the core reporting mechanism 7 is made of a light metal material, the main rod body 701 is a long rod-shaped structure, the transmission rods 702 are multiple and vertically connected to the main rod body 701, the number and positions of the transmission rods 702 correspond to the core barrels 2 and extend into the core barrels 2 through upper openings of the core barrels 2, the prompting rods 703 are two and L-shaped structures, one end of each prompting rod is connected to two ends of the main rod body 701 through a thread after passing through the round hole 511, therefore, the installation and free rotation of the core informing mechanism are realized, the transmission rod 702 is connected with the main rod body 701 in a welding mode, and the outer surface of the prompting rod 703 is painted with red paint.
As shown in fig. 12, the other end of the prompting rod 703 is staggered from the driving rod 702 by an angle of 30 °, and in a free state, the top end of the driving rod 702 points to the axial direction of the core barrel 2 and is inserted below the central axis of the core barrel 2 by a certain distance and does not contact with the inner surface.
The invention also relates to a core separation method for the coal mine underground hydraulic reverse circulation continuous coring, which can be realized by the core separation box for the coal mine underground hydraulic reverse circulation continuous coring, and comprises the following steps:
the method comprises the following steps: after the core separation box is completely assembled, the upper part of a negative pressure extraction box body 5 is connected with a gas negative pressure extraction pipeline in a well through a first flange 507, the front end of the sediment box body 6 can be connected with a plurality of graded sediment boxes through a second flange 601, a third flange 602 on the side surface is used for connecting a hole opening positive circulation deslagging pipeline, a core discharge pipe at the tail part of a hydraulic reverse circulation continuous coring drilling tool is connected with one sliding joint 3, other sliding joints 3 are sealed through protective caps, a first positioning hole 303 on the sliding joint 3 is aligned with a second positioning hole 403 on a joint cabinet and fixed through a pin, the tail part of the negative pressure extraction box body 5 is sealed through a sealing plate 510, and the sediment box body 6 is filled with flushing fluid in advance to achieve a water sealing effect, so that the core separation box body is integrally sealed;
step two: opening a gate valve of a negative pressure extraction pipeline, starting reverse circulation coring construction, enabling a coal core and part of coal rock debris to enter a core discharging pipe along a central channel of a coring drill and enter a core barrel 2 corresponding to the core barrel through one of sliding joints 3, enabling the coal core to be returned to impact a transmission rod 702 of a core signaling mechanism 7, enabling the transmission rod 702 to swing around a main rod body 701 so as to drive the prompting rod 703 to swing, playing a role of coal core returning signaling, enabling flushing fluid and the coal rock debris to enter a lower part of a sediment box body 6 through an annular through hole 201 in the core barrel 2, enabling the coal core to reach a plug end face 203 at the bottom of the core barrel 2 under the hydraulic carrying effect and sequentially accumulating until the coal core in the core barrel 2 is filled to the lower end of the core signaling mechanism 702 by about 50mm, stopping construction, connecting the core returning pipe to the second sliding joint, plugging the first sliding joint, and continuously repeating the steps until all the core barrel is filled;
step three: closing a gate valve of a negative pressure extraction pipeline, cleaning and collecting a rock core, opening a sealing plate 510 at the tail part of a negative pressure extraction box 5 body, sequentially opening a blocking piece 105 at the tail part of a rock core cabinet 1 corresponding to a rock core barrel 2, enabling the rock core barrel 2 to slide out of the rock core cabinet 1 under the action of gravity, sequentially transferring the coal and rock cores in the rock core barrel 2 into the rock core box for collection and cataloguing treatment, inserting the rock core barrel 2 into the rock core cabinet after the treatment is finished, putting down the blocking piece 105, putting down the sealing plate 510, repeating the step II, and continuously treating the coal and rock cores which are returned upwards.
Therefore, the invention has the advantages that:
1. the core cabinets are obliquely arranged, the inner surface of the core barrel is subjected to resistance reduction treatment, cores can be sequentially arranged in the core barrel according to the core returning sequence, and the core barrel can be directly taken out from a window at the tail of the negative pressure extraction box body, so that the core barrel is convenient to clean, collect and record.
2. Coal rock fragments and flushing fluid can enter the lower sediment box body through the annular through hole in the core barrel, and the coal core is separated from the sediment box body.
3. The core separation case is equipped with core letter mechanism, can make letter to the normal upward return of core and remind, is favorable to the staff to judge the construction state of coring.
4. The core cabinet and the joint cabinet are respectively provided with a handle, so that subsequent cleaning and maintenance are facilitated, the negative pressure extraction box body can be connected with a coal mine underground gas negative pressure extraction pipeline, the whole core separation box is good in airtightness and isolated from outside air, and safe core taking construction is guaranteed.
5. The gas negative pressure extraction, coal-rock core separation, coal-rock core upward return communication and sediment collection are integrated, and the gas negative pressure extraction device has the characteristics of simple structure, convenience in assembly and simplicity in operation, and has a good application value.
It should be apparent that the foregoing description and illustrations are by way of example only and are not intended to limit the present disclosure, application or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention will include any embodiments falling within the foregoing description and the appended claims.
Claims (10)
1. The utility model provides a colliery is rock core separator box for continuous coring of hydraulic reverse circulation in pit, includes rock core cabinet, a core section of thick bamboo, sliding joint, joint cabinet, negative pressure drainage box, sediment box and rock core letter reporting mechanism, its characterized in that:
the core cabinet and the joint cabinet are all obliquely arranged in the negative pressure extraction box body, the inclination angles of the core cabinets and the joint cabinet are consistent, the sliding joints are multiple and are arranged in the joint cabinet body, the core barrel is arranged in the core cabinet body at multiple detachable intervals, the core cabinet is arranged behind the joint cabinet body, the outer side of the core cabinet body is provided with a handle and is in sliding fit with the negative pressure extraction box body, the front ends of the sliding joints stretch out of the joint cabinet body to be connected to a core discharge pipe at the tail part of a hydraulic reverse circulation continuous core drilling tool, the rear ends of the sliding joints stretch out of the joint cabinet body to be connected to the core barrel in the core cabinet body respectively, the core signaling mechanism is arranged in the negative pressure extraction box body and above the core cabinet body, and the negative pressure extraction box body is arranged on a sediment box body.
2. The core separation box for the coal mine underground hydraulic reverse circulation continuous coring as claimed in claim 1, wherein: a plurality of circular through holes are formed in one side wall of the core cabinet at intervals, a plurality of circular small holes are formed in the opposite side wall of the core cabinet corresponding to the circular through holes of the same specification, a bolt and a blocking piece are sleeved in each circular small hole, and the blocking piece can rotate freely in the axial direction of the bolt.
3. The core separation box for the coal mine underground hydraulic reverse circulation continuous coring as claimed in claim 2, wherein: the core barrel is a plurality of and the cross-section is for being equipped with the fan-shaped circular arc structure of an upper shed, fan-shaped circular arc structure is equipped with the rectangular channel of longitudinal extension in upper shed both sides, and the both sides that correspond each circular through-hole in the core cabinet are equipped with the rectangle slide rail that parallel extension to on the relative lateral wall, each core barrel peg graft in core cabinet and freely slide on the rectangle slide rail, the interval is equipped with a plurality of annular through-holes on the perisporium of core barrel, core barrel internal surface polishing drag reduction handles, core barrel afterbody is furnished with the end cap, be equipped with multichannel sealing washer on the end cap.
4. The core separation box for the coal mine underground hydraulic reverse circulation continuous coring as claimed in claim 1, wherein: the middle part of the joint cabinet is provided with a first rectangular through hole for inserting the sliding joint, the joint cabinet is of a box structure, handles are arranged at two ends of the box structure, the sliding joint is of a box structure with a rectangular cross section, the front end of the sliding joint is provided with a core arranging pipe connected to the tail part of the hydraulic reverse circulation continuous core drilling tool, and the rear end of the sliding joint is provided with a connecting cylinder connected to a core barrel.
5. The core separation box for the coal mine underground hydraulic reverse circulation continuous coring as claimed in claim 4, wherein: the outer edges of the upper end wall and the lower end wall of the sliding joint are respectively provided with a limiting plate, the middle part of each limiting plate is provided with a positioning groove, the upper side and the lower side of the first rectangular through hole of the joint cabinet are respectively provided with a plurality of limiting holes corresponding to the positioning grooves, the axis of each limiting hole is in one-to-one correspondence with the axis of the core barrel on the same vertical plane, and the positioning grooves on the limiting plates are matched and fixed with the limiting holes on the joint cabinet through pins.
6. The core separation box for the coal mine underground hydraulic reverse circulation continuous coring as claimed in claim 1, wherein: the core barrel is characterized in that second rectangular through holes for the joint cabinets to be inserted are formed in two sides of the front end of the negative pressure extraction box, third rectangular through holes for the core cabinets to be inserted are formed in one side of the middle of the negative pressure extraction box, lower sliding rails for the joint cabinets to move in a guiding mode and supporting blocks for the core cabinets to be placed are arranged in the negative pressure extraction box, the lower sliding rails are matched and guided with lower rectangular grooves formed in the bottom ends of the joint cabinets, a first flange plate is arranged on the upper portion of the negative pressure extraction box, a fourth rectangular through hole for the sliding connectors to expose is formed in the front end of the negative pressure extraction box, a window for the core barrel to be taken out is arranged at the tail end of the negative pressure extraction box, a sealed rubber strip is arranged around the.
7. The core separation box for the coal mine underground hydraulic reverse circulation continuous coring as claimed in claim 1, wherein: the sediment box is of a square frame structure with an upper opening, a square baffle is arranged on the upper side of the rear part of the sediment box, and one side of the square baffle extends into the sediment box by a certain depth.
8. The core separation box for the coal mine underground hydraulic reverse circulation continuous coring as claimed in claim 1, wherein: the core is reported an information and is constructed rotatable locating in the negative pressure drainage box, core is reported an information and is constructed and be located core section of thick bamboo entrance, core is reported an information and is constructed and contain the main part of rod, transfer line and suggestion pole, the main part of rod is a stock column structure, the transfer line is a plurality of and perpendicular connection to the main part of rod, the quantity and the position of transfer line correspond to each core section of thick bamboo, core is reported an information and is constructed and adopt light aluminum alloy material processing.
9. The core separation box for the coal mine underground hydraulic reverse circulation continuous coring as claimed in claim 8, wherein: the utility model discloses a rock core letter press, including the core section of thick bamboo axis, suggestion pole, the core section of thick bamboo axis is equipped with the transmission pole, and the suggestion pole is two and be L type structure, and its one end is connected in order to realize the free rotation of core letter mechanism with the both ends of the body of the main rod, the other end of suggestion pole sets up with the certain angle that staggers of transmission pole, under the free state, the transmission pole top is directional core section of thick bamboo incline direction just inserts certain distance below the core section.
10. A core separation method for coal mine underground hydraulic reverse circulation continuous coring is characterized by comprising the following steps:
the method comprises the following steps: after the core separation box is completely assembled, the upper part of a negative pressure extraction box body is connected with a downhole gas negative pressure extraction pipeline, the front end of the sediment box body is connected with a plurality of grading sediment boxes, the side surface of the sediment box body is connected with an orifice positive circulation sediment discharge pipeline, a core discharge pipe at the tail part of a hydraulic reverse circulation continuous core drilling tool is connected with one sliding joint, other sliding joints are closed, the negative pressure extraction tail part seals the window through a sealing plate, the sediment box body is filled with flushing fluid to achieve a water sealing effect, and the core separation box is integrally closed;
step two: opening a gate valve of a negative pressure extraction pipeline, starting reverse circulation coring construction, enabling a coal core and part of coal rock debris to enter a core discharging pipe along a central channel of a coring drilling tool, entering a core barrel corresponding to the core barrel through one of sliding joints, enabling an upward coal core to impact a transmission rod of a core signaling mechanism, enabling the transmission rod to swing around a main rod body so as to drive the prompting rod to swing, playing a role in upward returning signaling of the coal core, enabling flushing fluid and debris to enter a sediment box body through the core barrel, enabling the coal core to reach the bottom end face of the core barrel under the hydraulic carrying effect and sequentially accumulating until the coal core of the core barrel is filled to about 50mm of the lower end of the core signaling mechanism, stopping construction, connecting the core returning pipe to a second sliding joint, plugging the first sliding joint, and continuing to repeat the steps until all core barrels are filled;
step three: closing negative pressure drainage pipeline gate valve, carrying out rock core clearance and collecting, opening the closing plate of negative pressure drainage box afterbody, open in proper order that the core section of thick bamboo corresponds the separation blade of core cabinet afterbody, first core section of thick bamboo is followed under the action of gravity roll-off in the core cabinet will according to the order the coal core in the core section of thick bamboo is shifted over to the rock core case and is collected, is compiled and records the processing, will after handling finishes the core section of thick bamboo inserts the core cabinet to put down the separation blade, put down the closing plate, repeat step two to go up to return coal core and carry out continuous processing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010786802.5A CN111997549B (en) | 2020-08-07 | 2020-08-07 | Core separation box for coal mine underground hydraulic reverse circulation continuous coring and method thereof |
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| CN202010786802.5A CN111997549B (en) | 2020-08-07 | 2020-08-07 | Core separation box for coal mine underground hydraulic reverse circulation continuous coring and method thereof |
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| CN103032041A (en) * | 2012-12-24 | 2013-04-10 | 杨德寿 | Self-propelled continuous core sample-cutting machine |
| CN103510901A (en) * | 2013-10-17 | 2014-01-15 | 无锡中地地质装备有限公司 | Tubular core-taking-out structure for drilling tool |
| CN105836413A (en) * | 2016-05-20 | 2016-08-10 | 湖南三德科技股份有限公司 | Sample delivering system with iron removing device |
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| CN111997549B (en) | 2022-07-22 |
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