CN116607941A - Secondary ore rock crushing method and secondary ore rock crushing device - Google Patents
Secondary ore rock crushing method and secondary ore rock crushing device Download PDFInfo
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- CN116607941A CN116607941A CN202310602469.1A CN202310602469A CN116607941A CN 116607941 A CN116607941 A CN 116607941A CN 202310602469 A CN202310602469 A CN 202310602469A CN 116607941 A CN116607941 A CN 116607941A
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- 239000011435 rock Substances 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 165
- 238000002347 injection Methods 0.000 claims abstract description 62
- 239000007924 injection Substances 0.000 claims abstract description 62
- 238000005553 drilling Methods 0.000 claims abstract description 20
- 238000012856 packing Methods 0.000 claims description 74
- 239000000463 material Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000013013 elastic material Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 238000005422 blasting Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- LLJRXVHJOJRCSM-UHFFFAOYSA-N 3-pyridin-4-yl-1H-indole Chemical compound C=1NC2=CC=CC=C2C=1C1=CC=NC=C1 LLJRXVHJOJRCSM-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/12—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid
Abstract
The invention provides a rock secondary crushing method and a rock secondary crushing device. The invention discloses a rock secondary crushing method, which comprises the following steps of: s1, drilling holes in ore rocks with the diameter larger than or equal to a first preset value in an ore outlet access roadway; s2, setting a packer in the borehole so that the packer seals an inlet of the borehole and defines a water injection cavity with the borehole; s3, injecting water into the water injection cavity so as to fracture the rock by utilizing water. Therefore, the ore rock secondary crushing method has the advantages of being convenient for crushing ore rock and continuously extracting ore.
Description
Technical Field
The invention relates to the technical field of mining, in particular to a rock secondary crushing method and a rock secondary crushing device.
Background
In the natural caving method mining process, the upper rock forms natural caving under the action of dead weight and a ground stress field, the caving rock mass needs to be treated by adopting technical measures, the suspended roof mass rock is usually mechanically crushed by adopting a long-arm breaking hammer or blasted by adopting a blasting manner, and the ore outlet mass rock is mainly subjected to a drilling secondary blasting crushing manner. The method has the advantages that the large-block ore rock is processed in a blasting or drilling blasting mode, so that production safety risk and cost are increased, underground operation environments (including dust, blasting smoke and tunnel stability in tunnels) are greatly influenced, vibration, flying stones and the like generated by blasting and crushing of the large-block ore rock have adverse effects on the stability of the bottom structure of the ore-drawing access tunnel, signal cables and the like, and the risk of damage to the bottom structure and maintenance cost are increased.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an embodiment of the invention provides a rock secondary crushing method and a rock secondary crushing device.
The ore rock secondary crushing method provided by the embodiment of the invention comprises the following steps of:
s1, drilling holes in ore rocks with the diameter larger than or equal to a first preset value in an ore outlet access roadway;
s2, setting a packer in the borehole so that the packer seals an inlet of the borehole and defines a water injection cavity with the borehole;
s3, injecting water into the water injection cavity so as to fracture the rock by utilizing water.
Therefore, the ore rock secondary crushing method provided by the embodiment of the invention has the advantages of convenience in crushing ore rock and sustainable ore discharge.
In some embodiments, in said step S2,
the packer may be inflated such that the inflated packer may seal off an inlet of the borehole;
the packer extends into the borehole and adjacent a bottom of the borehole.
In some embodiments, the packer comprises
A packing sleeve having a packing compartment, the packing sleeve being made of an elastic material so that the packing sleeve can expand;
the sealing barrel is annular and is arranged on the periphery of the water inlet pipe in a surrounding mode, a second water inlet of the water inlet pipe is positioned on the outer side of the water injection cavity, and a second water outlet of the water inlet pipe extends into the water injection cavity;
in the step S2, the packing cylinder extends into the borehole, and a distance between the packing cylinder and the bottom of the borehole in the extending direction of the borehole is 10mm or more.
In some embodiments, the packing cylinder is made of a rubber material, and the water inlet pipe is a steel pipe;
the length of the packing cylinder is more than or equal to 500mm and less than or equal to 1000mm;
the outer diameter of the water inlet pipe is more than or equal to 25mm and less than or equal to 40mm;
the length direction of the packing cylinder is consistent with the extending direction of the drilling hole, the outer diameter of the packing cylinder is smaller than the diameter of the drilling hole, and the difference between the diameter of the drilling hole and the outer diameter of the packing cylinder is more than or equal to 5mm and less than or equal to 10mm;
in the step S2, water is injected into the packing cylinder and the pressure in the packing cylinder is made to be 10MPa or more and 12MPa or less so that the packing cylinder expands and abuts against the wall surface of the borehole;
in the step S3, water is injected into the water injection cavity through the water inlet pipe so as to fracture the rock by utilizing water force.
In some embodiments, in said step S1,
on a cross section perpendicular to the extension direction of the borehole, the projection of the borehole is located at a central position of the projection of the rock mine;
the diameter of the drilled hole is greater than or equal to 50mm;
and in the extending direction of the drilling hole, the size ratio of the size of the drilling hole to the size of the ore rock is more than or equal to 1/2 and less than or equal to 4/5.
In some embodiments, the ratio of the size of the borehole to the size of the rock is 2/3 in the extension direction of the borehole;
the diameter of the ore rock is more than or equal to 1.2m.
In some embodiments, fracturing a plurality of the rock in the ore removal entry roadway simultaneously;
and simultaneously breaking the ore rocks in a plurality of ore drawing access roadways.
The invention also provides a rock secondary crushing device suitable for the rock secondary crushing method, which comprises
A water injection pump;
a first pipeline;
the packer can be placed in a borehole of mineral rock in the ore removal access roadway, the packer comprises a packing cylinder and a water inlet pipe, the packing cylinder is provided with a packing cavity, the packing cylinder is made of elastic materials so that the packing cylinder can expand, the packing cylinder is annular and is annularly arranged on the periphery of the water inlet pipe, a second water inlet and a second water outlet of the water inlet pipe extend out of the packing cylinder, and the second water inlet is communicated with the water injection pump through a first pipeline.
The ore rock secondary crushing device of the embodiment of the invention comprises
The sealing cavity is communicated with the water injection pump through a first connecting pipe and the first pipeline in sequence, and a first control valve and a first pressure gauge are arranged on the first connecting pipe;
the second water inlet is communicated with the water injection pump through a second connecting pipe and a first pipeline in sequence, and a second control valve and a second pressure gauge are arranged on the second connecting pipe;
the first pipeline is positioned in the ore drawing drift passage, and the ore drawing drift passage is communicated with the ore drawing drift passage;
at least one packer, each packer having the first connection tube and the second connection tube mated therewith;
and the packer is arranged in at least one of the ore drawing access roadways.
In some embodiments, the first connection tube and the second connection tube are each made of a rubber material;
the allowable pressure of each of the first connecting pipe and the second connecting pipe is more than or equal to 40MPa, the allowable pressure of the water injection pump is more than or equal to 40MPa, and the water outlet flow of the water injection pump is less than or equal to 50L/min;
the secondary ore rock crushing device further comprises a second pipeline and a water supply barrel, wherein an inlet of the second pipeline stretches into the water supply barrel, an outlet of the second pipeline is communicated with an inlet of the water injection pump, and the water supply barrel and the water injection pump are located in a transportation roadway of an upper ore body disc or a transportation roadway of a lower ore body disc.
Drawings
Fig. 1 is a schematic diagram of drilling of rock of an ore removal entry roadway according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a water injection pump and a first circuit according to an embodiment of the present invention.
Fig. 3 is a schematic view of a secondary crushing device according to an embodiment of the invention.
FIG. 4 is a schematic diagram of a packer according to an embodiment of the invention.
Reference numerals:
a rock secondary crushing device 100;
rock 1, drilling 11;
a packing cylinder 2, a first connecting pipe 21, a first control valve 22, a first pressure gauge 23;
a water inlet pipe 3, a second connecting pipe 31, a second control valve 32 and a second pressure gauge 33;
a water injection pump 4;
a first pipe 5;
a second pipeline 6;
a water supply tank 7;
an ore drawing access roadway 81, an ore drawing drift roadway 82, and a transportation roadway 83.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The following describes a rock secondary crushing method according to an embodiment of the present invention with reference to the accompanying drawings. As shown in fig. 1 to 4, the rock secondary crushing method according to an embodiment of the present invention includes the steps of:
s1, drilling holes 11 are formed in the ore rock 1 with the diameter larger than or equal to a first preset value in the ore drawing access roadway 81.
S2, setting a packer in the borehole 11 so that the packer seals an inlet of the borehole 11 and defines a water injection cavity with the borehole 11.
S3, injecting water into the water injection cavity so as to fracture the rock 1 by utilizing water.
According to the ore rock secondary crushing method provided by the embodiment of the invention, after the drill hole 11 is formed in the ore rock 1 to be crushed, the inlet of the drill hole 11 is blocked by using the packer, and the water injection cavity is defined by the packer and the drill hole 11; so that water can be injected into the water injection cavity, and the continuous water injection can continuously increase the pressure in the water injection cavity so as to crush the rock 1 by utilizing the water. Compared with the method for crushing the ore 1 by blasting or expanding, the method for secondarily crushing the ore according to the embodiment of the invention adopts hydraulic crushed rock, so that the influence on the underground operation environment can be reduced, the adverse influence of the blasting secondary crushing of large-block ore is eliminated, and the horizontal operation environment and the stability of the ore outlet of the mine bottom structure by a natural caving method are improved; the influence of secondary crushing of the ore outlet on the shutdown of ore discharging operation of the scraper is avoided, the continuity of ore production process is improved, and the stable mine productivity is ensured. The efficiency of breaking the rock 1 can be ensured by utilizing the hydraulic power to break, and the situation that the rock 1 cannot be broken due to insufficient expansion force generated by the expander can be reduced.
Therefore, the ore secondary crushing method according to the embodiment of the invention has the advantages of being convenient for crushing the ore 1 and continuously discharging the ore.
As shown in fig. 1 to 4, the present invention also proposes an ore secondary crushing apparatus 100 adapted to the ore secondary crushing method according to the embodiment of the present invention, and the ore secondary crushing method according to the embodiment of the present invention will be specifically described below in connection with the ore secondary crushing apparatus 100 according to the embodiment of the present invention.
In step S1, a drill hole 11 is formed in the rock 1 having a diameter equal to or larger than a first preset value in the ore drawing roadway 81. Specifically, the ore 1 to be crushed is a massive ore, and the diameter of the ore 1 is greater than or equal to 1.2m. The low-level large ore is crushed by hydraulic power. The large blocks of the suspended ceiling are usually broken mechanically by using a long-arm breaking hammer or broken by blasting by using a blasting rod blasting mode.
As shown in fig. 1 to 4, in some embodiments, in step S1, the projection of the borehole 11 is located at a central position of the projection of the rock mine 1 on a cross section perpendicular to the extension direction of the borehole 11. That is, the drill hole 11 is opened at the center position of the rock 1 so that the hydraulic power can fracture the rock 1 from the center position of the rock 1.
In some embodiments, the diameter of the bore 11 is greater than or equal to 50mm. For example, the diameter of the bore 11 is 60mm.
In the extending direction of the bore hole 11, the dimension ratio of the bore hole 11 to the rock 1 is 1/2 or more and 4/5 or less. So that the hydraulic power can be made to facilitate the breaking of the rock 1 into pieces.
In some embodiments, the ratio of the size of the bore hole 11 to the size of the rock 1 in the extension direction of the bore hole 11 is 2/3.
In step S2, a packer is set within the borehole 11 such that the packer seals the inlet of the borehole 11 and defines a water injection chamber with the borehole 11.
In some embodiments, in step S2, the packer may be inflated so that the inflated packer may seal off the inlet of the borehole 11. So that after the borehole 11 is opened, the contracted packer is inflated after extending into the borehole 11 so that the packer closes the inlet of the borehole 11 and defines a water injection chamber with the bottom and inner wall surface of the borehole 11.
As shown in fig. 1 to 4, the longitudinal direction of the packing cylinder 2 coincides with the extending direction of the bore hole 11, the outer diameter of the packing cylinder 2 is smaller than the diameter of the bore hole 11, and the difference between the diameter of the bore hole 11 and the outer diameter of the packing cylinder 2 is 5mm or more and 10mm or less. For example, the difference between the diameter of the bore 11 and the outer diameter of the packing sleeve 2 is 8mm.
In step S2, water is injected into the packing casing 2 so that the pressure in the packing casing 2 is 10MPa or more and 12MPa or less to expand the packing casing 2 and come into contact with the wall surface of the borehole 11. Specifically, water injection into the packing cylinder 2 may be stopped such that the pressure in the packing cylinder 2 reaches 12 MPa. Thereby, the packing sleeve 2 can be ensured to block the bore hole 11.
In step S3, water is injected into the water injection chamber to fracture the rock 1 using water. Specifically, in step S3, water is injected into the water injection chamber through the water inlet pipe 3 to fracture the rock 1 by using the water force.
As shown in fig. 2 to 4, the rock secondary crushing device 100 according to the embodiment of the present invention includes a water injection pump 4, a first pipe 5, and a packer.
A packer can be placed in a borehole 11 of rock 1 in a rock-out access roadway 81, the packer comprising a packing cylinder 2, a water inlet pipe 3. Specifically, the packing cylinder 2 and the water inlet pipe 3 are assembled by metal rod members, joints, and the like.
The packing sleeve 2 has a packing compartment, and the packing sleeve 2 is made of an elastic material so that the packing sleeve 2 can be expanded. The sealing cylinder 2 is annular and is annularly arranged on the peripheral side of the water inlet pipe 3, the second water inlet and the second water outlet of the water inlet pipe 3 extend out of the sealing cylinder 2, the second water inlet of the water inlet pipe 3 is positioned on the outer side of the water injection cavity, and the second water outlet of the water inlet pipe 3 extends into the water injection cavity. The second water inlet is communicated with the water injection pump 4 through a first pipeline 5.
Specifically, after the packing sleeve 2 is inserted into the bore hole 11, water or gas may be injected into the packing chamber so that the packing sleeve 2 expands and abuts against the inner wall surface of the bore hole 11 to block the inlet of the bore hole 11. Then the water injection pump 4 injects water into the water inlet pipe 3 through the first pipeline 5 and the second water inlet, so that water enters the water injection cavity through the water inlet pipe 3, and the rock 1 is broken by utilizing the water.
As shown in fig. 3 and 4, the packer extends into the borehole 11 and is adjacent the bottom of the borehole 11. Specifically, in step S2, the packing sleeve 2 is inserted into the borehole 11, and the distance between the packing sleeve 2 and the bottom of the borehole 11 in the extending direction of the borehole 11 is 10mm or more. For example, the packing sleeve 2 protrudes into the bore hole 11, and the distance of the packing sleeve 2 from the bottom of the bore hole 11 in the extending direction of the bore hole 11 is 15mm.
In some embodiments, the packing sleeve 2 is made of a rubber material and the water inlet pipe 3 is a steel pipe. The length of the packing cylinder 2 is 500mm or more and 1000mm or less. The outer diameter of the water inlet pipe 3 is more than or equal to 25mm and less than or equal to 40mm. For example, the length of the packing cylinder 2 is 800mm and the outer diameter of the water inlet pipe 3 is 30mm.
As shown in fig. 3 and 4, in some embodiments, the rock secondary crushing device 100 of the embodiment of the present invention includes a first connection pipe 21 and a second connection pipe 31, and the first pipe 5, the first connection pipe 21, and the second connection pipe 31 are all made of rubber materials. For example, the first pipe 5, the first connection pipe 21 and the second connection pipe 31 are all high-pressure rubber pipes.
The sealing cavity is communicated with the water injection pump 4 sequentially through a first connecting pipe 21 and a first pipeline 5, and a first control valve 22 and a first pressure gauge 23 are arranged on the first connecting pipe 21. Thereby, the water injection pump 4 can inject water into the sealed compartment through the first connection pipe 21 and the first pipeline 5 so as to expand the sealed compartment. The first control valve 22 can control the opening and closing of the first connecting pipe 21 so as to control whether to fill water into the packing cylinder 2 by using the first control valve 22. The first pressure gauge 23 may monitor the pressure within the first connection tube 21 and thus the water pressure within the sealed compartment of the cartridge 2.
As shown in fig. 3 and 4, the second water inlet is communicated with the water injection pump 4 through a second connecting pipe 31 and a first pipeline 5 in sequence, and a second control valve 32 and a second pressure gauge 33 are arranged on the second connecting pipe 31. Thus, the water injection pump 4 can inject water into the water injection cavity through the water inlet pipe 3, the second connecting pipe 31 and the first pipeline 5 so as to crush the rock 1 by utilizing water. The second control valve 32 can control the opening and closing of the second connection pipe 31, so that the second control valve 32 can be used for controlling whether to fill water into the water filling cavity. The second pressure gauge 33 may monitor the pressure in the second connection pipe 31, thereby monitoring the water pressure in the water injection chamber. For example, the first pressure gauge 23 and the second pressure gauge 33 are both shock-resistant pressure gauges.
As shown in fig. 3 and 4, in some embodiments, the allowable pressure of each of the first connection pipe 21 and the second connection pipe 31 is 40MPa or more, the allowable pressure of the water injection pump 4 is 40MPa or more, and the water outlet flow rate of the water injection pump 4 is 50L/min or less. Specifically, the water injection pump 4 is a small flow plunger pump, so that when the water injection pump 4 injects water into the packing cylinder 2, the water injection pump can prevent the maximum pressure of the packing cylinder 2 from being exceeded for a short time. For example, the allowable pressure of each of the first connection pipe 21 and the second connection pipe 31 is 60MPa.
The secondary ore crushing device 100 further comprises a second pipeline 6 and a water supply barrel 7, wherein an inlet of the second pipeline 6 stretches into the water supply barrel 7, an outlet of the second pipeline 6 is communicated with an inlet of the water injection pump 4, and the water supply barrel 7 and the water injection pump 4 are positioned in a transportation roadway 83 of an upper ore body disc or a transportation roadway 83 of a lower ore body disc. Mine water in the underground water pipe of the mine can be introduced into the water supply barrel 7 through a water pipe. For example, the water supply tank 7 and the water injection pump 4 are located in a transportation roadway 83 of the ore body bottom wall.
In some embodiments, the plurality of rock 1 in the ore drawing path roadway 81 are broken at the same time. Specifically, there is at least one packer, each packer having a first connection tube 21 and a second connection tube 31 mated therewith. Accordingly, when it is necessary to simultaneously fracture the plurality of rock ores 1 in the ore drawing roadway 81, the plurality of rock ores 1 in the ore drawing roadway 81 are drilled with the drill holes 11, and the packer is placed in each drill hole 11 so as to fracture the plurality of rock ores 1 by using the plurality of packers.
In some embodiments, each of the plurality of packing barrels 2 communicates with the first connection tube 21 through a third connection tube having a third control valve provided thereon, such that each packing barrel 2 may be individually controlled.
As shown in fig. 2 to 4, in some embodiments, the rock 1 in the plurality of ore drawing and entering lanes 81 is broken at the same time. Specifically, a packer is provided in at least one of the plurality of ore drawing and entry roadways 81. The first pipeline 5 is located in an ore drawing drift 82, and the ore drawing drift 82 is communicated with a plurality of ore drawing drift 81. The packer in each ore drawing entry way 81 communicates with the first pipe 5 in the ore drawing vein passing way 82 via the first connecting pipe 21 and the second connecting pipe 31. Thus, when the packers are provided in the plurality of ore drawing and entering lanes 81, the first pipeline 5 can be utilized to supply water for the sealing chamber and the water injection chamber so as to simultaneously fracture the ore 1 in the plurality of ore drawing and entering lanes 81.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore 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 a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (10)
1. The ore rock secondary crushing method is characterized by comprising the following steps of:
s1, drilling holes in ore rocks with the diameter larger than or equal to a first preset value in an ore outlet access roadway;
s2, setting a packer in the borehole so that the packer seals an inlet of the borehole and defines a water injection cavity with the borehole;
s3, injecting water into the water injection cavity so as to fracture the rock by utilizing water.
2. The rock secondary crushing method according to claim 1, wherein, in the step S2,
the packer may be inflated such that the inflated packer may seal off an inlet of the borehole;
the packer extends into the borehole and adjacent a bottom of the borehole.
3. A rock secondary crushing method according to claim 2, wherein,
the packer comprises
A packing sleeve having a packing compartment, the packing sleeve being made of an elastic material so that the packing sleeve can expand;
the sealing barrel is annular and is arranged on the periphery of the water inlet pipe in a surrounding mode, a second water inlet of the water inlet pipe is positioned on the outer side of the water injection cavity, and a second water outlet of the water inlet pipe extends into the water injection cavity;
in the step S2, the packing cylinder extends into the borehole, and a distance between the packing cylinder and the bottom of the borehole in the extending direction of the borehole is 10mm or more.
4. A rock secondary crushing method according to claim 3, wherein,
the packing cylinder is made of rubber materials, and the water inlet pipe is a steel pipe;
the length of the packing cylinder is more than or equal to 500mm and less than or equal to 1000mm;
the outer diameter of the water inlet pipe is more than or equal to 25mm and less than or equal to 40mm;
the length direction of the packing cylinder is consistent with the extending direction of the drilling hole, the outer diameter of the packing cylinder is smaller than the diameter of the drilling hole, and the difference between the diameter of the drilling hole and the outer diameter of the packing cylinder is more than or equal to 5mm and less than or equal to 10mm;
in the step S2, water is injected into the packing cylinder and the pressure in the packing cylinder is made to be 10MPa or more and 12MPa or less so that the packing cylinder expands and abuts against the wall surface of the borehole;
in the step S3, water is injected into the water injection cavity through the water inlet pipe so as to fracture the rock by utilizing water force.
5. A rock secondary crushing method according to claim 1, wherein,
in the step S1 of the process described above,
on a cross section perpendicular to the extension direction of the borehole, the projection of the borehole is located at a central position of the projection of the rock mine;
the diameter of the drilled hole is greater than or equal to 50mm;
and in the extending direction of the drilling hole, the size ratio of the size of the drilling hole to the size of the ore rock is more than or equal to 1/2 and less than or equal to 4/5.
6. A rock secondary crushing method according to claim 5, wherein,
in the extending direction of the drilling hole, the size ratio of the drilling hole to the ore is 2/3;
the diameter of the ore rock is more than or equal to 1.2m.
7. A rock secondary crushing method according to any one of claims 1 to 6, wherein,
simultaneously fracturing a plurality of ore rocks in the ore drawing access roadway;
and simultaneously breaking the ore rocks in a plurality of ore drawing access roadways.
8. A rock secondary crushing apparatus suitable for use in the rock secondary crushing method of any one of claims 1 to 7, comprising
A water injection pump;
a first pipeline;
the packer can be placed in a borehole of mineral rock in the ore removal access roadway, the packer comprises a packing cylinder and a water inlet pipe, the packing cylinder is provided with a packing cavity, the packing cylinder is made of elastic materials so that the packing cylinder can expand, the packing cylinder is annular and is annularly arranged on the periphery of the water inlet pipe, a second water inlet and a second water outlet of the water inlet pipe extend out of the packing cylinder, and the second water inlet is communicated with the water injection pump through a first pipeline.
9. The ore rock secondary crushing apparatus according to claim 8, comprising
The sealing cavity is communicated with the water injection pump through a first connecting pipe and the first pipeline in sequence, and a first control valve and a first pressure gauge are arranged on the first connecting pipe;
the second water inlet is communicated with the water injection pump through a second connecting pipe and a first pipeline in sequence, and a second control valve and a second pressure gauge are arranged on the second connecting pipe;
the first pipeline is positioned in the ore drawing drift passage, and the ore drawing drift passage is communicated with the ore drawing drift passage;
at least one packer, each packer having the first connection tube and the second connection tube mated therewith;
and the packer is arranged in at least one of the ore drawing access roadways.
10. The ore rock secondary crushing apparatus according to claim 9, wherein,
the first connecting pipe and the second connecting pipe are both made of rubber materials;
the allowable pressure of each of the first connecting pipe and the second connecting pipe is more than or equal to 40MPa, the allowable pressure of the water injection pump is more than or equal to 40MPa, and the water outlet flow of the water injection pump is less than or equal to 50L/min;
the secondary ore rock crushing device further comprises a second pipeline and a water supply barrel, wherein an inlet of the second pipeline stretches into the water supply barrel, an outlet of the second pipeline is communicated with an inlet of the water injection pump, and the water supply barrel and the water injection pump are located in a transportation roadway of an upper ore body disc or a transportation roadway of a lower ore body disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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