CN112539072B - Roadway combined supporting method and device for surface spraying and negative-pressure slurry pumping and crack filling - Google Patents
Roadway combined supporting method and device for surface spraying and negative-pressure slurry pumping and crack filling Download PDFInfo
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- CN112539072B CN112539072B CN202011045045.2A CN202011045045A CN112539072B CN 112539072 B CN112539072 B CN 112539072B CN 202011045045 A CN202011045045 A CN 202011045045A CN 112539072 B CN112539072 B CN 112539072B
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- 238000005507 spraying Methods 0.000 title claims abstract description 161
- 238000005086 pumping Methods 0.000 title claims abstract description 63
- 239000002002 slurry Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000011435 rock Substances 0.000 claims abstract description 156
- 230000005641 tunneling Effects 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000000605 extraction Methods 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 30
- 230000002787 reinforcement Effects 0.000 abstract description 10
- 239000011247 coating layer Substances 0.000 abstract description 4
- 238000004873 anchoring Methods 0.000 abstract description 2
- 239000007921 spray Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 7
- 239000002817 coal dust Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000003566 sealing material Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
- F04F1/14—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped adapted to pump specific liquids, e.g. corrosive or hot liquids
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to the technical field of roadway support, in particular to a roadway combined support method and a roadway combined support device for surface spraying and negative-pressure slurry pumping and filling cracks, and the roadway combined support method for surface spraying and negative-pressure slurry pumping and filling cracks comprises the following steps: and (3) spraying treatment: spraying the surface of the surrounding rock along the tunneling direction of the roadway to form a spraying layer on the surface of the surrounding rock; slurry pumping treatment: carrying out negative-pressure air extraction on the cracks of the surrounding rock of which the surface has formed the spray coating layer so as to enable the spray coating material in the form of paste or fluid in the spray coating layer to enter the cracks of the surrounding rock; and continuously performing spraying treatment in front of the slurry pumping treatment along the tunneling direction of the roadway. The combined reinforcement and support of the surface spraying and the slurry pumping filling of the surrounding rock of the roadway are realized, the time for waiting for the curing of the spraying material is reduced, the tunneling efficiency of the roadway is improved, the surrounding rock is supported by utilizing the atmospheric pressure formed by the negative pressure of the air exhaust, and then the permanent support is carried out by utilizing the anchoring device at the curing section of the spraying material, so that the atmospheric pressure temporary support and the negative pressure slurry pumping reinforcement of the surrounding rock are comprehensively realized.
Description
Technical Field
The invention belongs to the technical field of roadway support, and particularly relates to a roadway combined support method and device for surface spraying and negative-pressure slurry pumping filling of cracks.
Background
The mechanized coal roadway tunneling equipment mainly comprises a cantilever type tunneling machine, a continuous mining machine or an excavation and anchoring unit, the cutting and rock breaking mode mainly comprises 2 types of partial section or full section cutting, and the time for completing one cycle of rock breaking and cutting is usually 5-30 min. The atmospheric pressure formed by the suction negative pressure on the surface of the surrounding rock is used for temporary supporting of the roadway, and the surrounding rock on the tunneling working face needs to be sprayed with a sealing material after tunneling cutting is finished. Since the spray material is in the form of liquid or paste, it takes a certain time to cure after spraying. If the tunnel is cured and then air is exhausted to form negative pressure support, the tunneling speed of the tunnel is influenced, and surrounding rocks near the tunneling working face of the tunnel are in a non-support state in the process, so that the stability of the tunnel is influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. The invention provides a roadway combined supporting method of surface spraying and negative-pressure slurry pumping and crack filling, which comprises the steps of spraying sealing materials on surrounding rocks of a tunneling working surface after tunneling and cutting are finished, and sucking liquid or paste-shaped spraying materials on the surface of the newly excavated surrounding rocks of the tunneling working surface into cracks of the surrounding rocks by using negative pressure. The combined reinforcement and support of the surface spraying and slurry pumping filling of the surrounding rock of the roadway are realized, the time for waiting for the curing of the spraying material is reduced, the tunneling efficiency of the roadway is improved, meanwhile, the support can be timely provided for the surrounding rock near the tunneling working surface of the roadway, and the stability of the surrounding rock of the tunneling working surface is ensured.
The invention also provides a roadway combined supporting device for surface spraying and negative-pressure slurry pumping and crack filling.
According to the embodiment of the first aspect of the invention, the roadway combined supporting method of surface spraying and negative-pressure slurry pumping filling of the cracks comprises the following steps:
and (3) spraying treatment: spraying the surface of the surrounding rock along the tunneling direction of the roadway to form a spraying layer on the surface of the surrounding rock;
slurry pumping treatment: carrying out negative pressure air extraction on the cracks of the surrounding rocks of which the surface is provided with the spray-coating layer so as to enable the spray-coating material in the form of paste or fluid in the spray-coating layer to enter the cracks of the surrounding rocks;
and continuously performing the spraying treatment in front of the slurry pumping treatment along the tunneling direction of the roadway.
According to one embodiment of the invention, in the spraying treatment, the spraying layer is provided with an air pumping hole, so that the cracks of the surrounding rock are pumped out under negative pressure through the air pumping hole in the slurry pumping treatment.
According to one embodiment of the invention, in the slurry pumping treatment, a suction cup is arranged at the air pumping hole, and negative pressure air pumping is carried out on the surrounding rock cracks through connection of an air pumping device and the suction cup.
According to the embodiment of the second aspect of the invention, the device for jointly supporting the roadway with the surface spraying and negative-pressure slurry pumping and filling fracture by applying the method for jointly supporting the roadway with the surface spraying and negative-pressure slurry pumping and filling fracture comprises a tunneling device, and a cleaning device, a spraying device and an air extracting device which are arranged behind the tunneling device along the tunneling direction of the roadway, wherein the cleaning device is used for cleaning the surface of the surrounding rock of the roadway, the spraying device is used for spraying the surface of the surrounding rock, and the air extracting device is used for performing negative-pressure air extraction on the surrounding rock.
According to one embodiment of the invention, the spraying device comprises a spraying pipeline, a spraying moving device and a feeding device, wherein a discharge hole of the spraying pipeline is formed in the spraying moving device, and a feed hole of the spraying pipeline is communicated with the cleaning device or the feeding device so as to clean the surface of the surrounding rock or spray the spraying material on the surface of the surrounding rock.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects: the roadway combined supporting method of the surface spraying and negative-pressure slurry pumping and crack filling comprises the steps of firstly, after a roadway is circularly excavated, cleaning the surface of surrounding rock by a cleaning device when a roof and two sides of newly exposed surrounding rock are excavated and support is not yet applied, attaching coal dust, water and a mixture of the coal dust and the water to the surface of the surrounding rock, sealing the surface of the surrounding rock after the surface of the surrounding rock is cleaned, finally, spraying the cleaned surface of the surrounding rock by a spraying device to form a spraying layer, continuously exhausting the surrounding rock while spraying to form negative pressure in cracks of the surrounding rock, forming pressure difference inside and outside the spraying layer, sucking the unset spraying layer in a paste or fluid state into the cracks under the action of the negative pressure, and filling and reinforcing the cracks of the surrounding rock. The invention relates to a roadway combined supporting method of surface spraying and negative-pressure slurry pumping and crack filling, which is characterized in that after tunneling and cutting are finished, a sealing material is sprayed on surrounding rocks on a tunneling working surface, and liquid or pasty spraying material on the surface of the newly excavated surrounding rocks on the tunneling working surface is sucked into cracks of the surrounding rocks by using negative pressure. The combined reinforcement and support of the surface spraying and slurry pumping filling of the surrounding rock of the roadway are realized, the time for waiting for the curing of the spraying material is reduced, the tunneling efficiency of the roadway is improved, meanwhile, the support can be timely provided for the surrounding rock near the tunneling working face of the roadway, and the stability of the surrounding rock of the tunneling working face is ensured.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the present invention will be further described with reference to the accompanying drawings or will be understood by the practice of the present invention.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the present invention will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a roadway combined support method for surface spraying and negative-pressure slurry pumping fracture filling according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a roadway combined supporting device for surface spraying and negative-pressure slurry pumping and crack filling according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of an air extractor of a roadway combined support device for surface spraying and negative-pressure slurry pumping and crack filling according to an embodiment of the invention.
Reference numerals are as follows:
1: surrounding rocks; 11: cracking; 13: tunneling a working face; 2: spraying a protective layer;
3: a tunneling device; 4: a cleaning device; 5: a spraying device;
6: an air extraction device; 61: a suction cup; 62: a vacuum pump; 63: and an air pumping pipeline.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means 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 embodiments of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1, a roadway combined supporting method for surface spraying and negative pressure slurry pumping and crack filling provided by the embodiment of the invention includes:
s1, spray coating: spraying the surface of the surrounding rock 1 along the tunneling direction of the roadway to form a spraying layer 2 on the surface of the surrounding rock 1;
s2, carrying out negative pressure air extraction on the cracks 11 of the surrounding rock 1 with the spraying layer 2 formed on the surface, so that the spraying material in the spraying layer 2 in a paste or fluid state enters the cracks 11 of the surrounding rock 1;
and S3, continuously performing the spraying treatment in the step S2 in front of the slurry pumping treatment in the step S1 along the driving direction of the roadway.
The roadway combined supporting method of the surface spraying and negative pressure slurry pumping crack of the embodiment of the invention comprises the steps of firstly, after a roadway is circularly excavated, when a top plate and two sides of a newly exposed surrounding rock 1 are excavated, supports are not yet applied, when coal dust, water and a mixture of the coal dust and the water are adhered to the surface of the surrounding rock 1, cleaning the surface of the surrounding rock 1 through a cleaning device 4, after the surface of the surrounding rock 1 is cleaned, spraying the surface of the cleaned surrounding rock 1 through a spraying device 5 to form a spraying layer 2, continuously exhausting the surrounding rock 1 where the spraying layer 2 is not solidified into paste or fluid during spraying, forming negative pressure in the crack 11 of the surrounding rock 1, forming pressure difference inside and outside the spraying layer 2, sucking the unset paste or fluid into the crack 11 under the action of the negative pressure, and filling and reinforcing the crack 11 of the surrounding rock 1. The driving direction of the roadway is close to the tail end position which is not excavated as the front, and the driving direction of the roadway is close to the initial end position which is excavated as the rear, and the slurry pumping treatment is continuously carried out after the spraying treatment in the driving process of the whole roadway. The roadway combined supporting method of surface spraying and negative-pressure slurry pumping filling cracks is characterized in that after tunneling and cutting are completed, sealing materials are sprayed on surrounding rocks 1 on a tunneling working surface 13, and fluid or paste spraying materials formed by spraying the surfaces of the newly excavated surrounding rocks 1 on the tunneling working surface 13 are sucked into cracks 11 of the surrounding rocks 1 by means of negative pressure. The combined reinforcement and support of the surface spraying and the slurry pumping filling of the surrounding rock 1 of the roadway are realized, the time for waiting for the solidification of the spraying layer 2 is reduced, the tunneling efficiency of the roadway is improved, meanwhile, the support can be timely provided for the surrounding rock 1 near the tunneling working face 13, the stability of the surrounding rock 1 of the tunneling working face 13 is ensured, and the negative pressure slurry pumping reinforcement and the atmospheric pressure temporary support of the surrounding rock 1 are comprehensively realized.
And starting the air extracting device 6 to extract the surrounding rock 1 under negative pressure while the spraying device 5 sprays the spraying material. The air pressure of the pumping opening of the air pumping device 6 is p 1 The gas pressure of the surrounding rock 1 fracture 11 area is p 2 Atmospheric pressure of p 0 According to Bernoulli's equation
Due to the air pressure p of the air extraction opening of the air extraction device 6 1 Fracture 11 pressure p less than surrounding rock 1 2 And the height h of the gas in the fissure 11 of the surrounding rock 1 and the gas in the gas extraction device 6 1 ＝h 2 Substantially close, then u 1 ＞υ 2 I.e. the gas in the fissures 11 of the surrounding rock 1 flows to the gas extraction device 6, the gas pressure p in the fissures 11 of the surrounding rock 1 2 Reducing the pressure difference delta p = p between the air pressure in the crack 11 of the surrounding rock 1 and the surface spraying material of the surrounding rock 1 0 -p 2 The spraying material is sprayed under the atmospheric pressure difference delta p = p 0 -p 2 Under the action of the spraying material, the coating material enters the cracks 11 of the surrounding rock 1, the cracks 11 of the surrounding rock 1 are gradually filled, and the reinforcing of the surrounding rock 1 is completed after the spraying material is solidified and reaches certain strength.
As shown in fig. 2 and 3, according to one embodiment of the present invention, in the coating process of step S1, the jacket layer 2 is configured with air extraction holes so as to perform negative pressure air extraction of the fissures 11 of the surrounding rock 1 through the air extraction holes in the slurry extraction process of step S2. In this embodiment, when the spraying device 5 is used to spray the surface of the surrounding rock 1, the air suction holes are reserved, that is, the individual positions on the surface of the surrounding rock 1 are not covered with the spraying layer 2, and the spraying layer 2 formed by spraying has the air suction holes. The fracture 11 of the surrounding rock 1 can be subjected to negative pressure air extraction through the air extraction hole.
According to one embodiment of the invention, in the slurry pumping process of step S2, a suction cup 61 is installed at the air pumping hole, and the surrounding rock 1 cracks 11 are pumped under negative pressure through the connection of the air pumping device 6 and the suction cup 61. In this embodiment, after finishing the clearance on 1 surperficial of country rock, form protecting layer 2 through spraying device 5 to the surface spraying coating material of country rock 1, reserve the aspirating hole on protecting layer 2, hug closely sucking disc 61 in aspirating hole department after the spraying, make again protecting layer 2 and sucking disc 61 jointly with the surface seal of country rock 1, air exhaust device 6 bleeds to country rock 1 through sucking disc 61 to form the negative pressure effect of 1 crack 11 of country rock. In this embodiment, the spraying device 5 is turned on to spray the spraying material on the surface of the surrounding rock 1, and the vacuum pump is turned on to pump the surrounding rock 1 through the suction cup 61 attached to the surrounding rock 1 while the spraying device 5 sprays the spraying material, so that the fracture 11 of the surrounding rock 1 is in a negative pressure state.
The suction port of the vacuum pump 62 has a pressure p 1 The gas pressure of the surrounding rock 1 fracture 11 area is p 2 At atmospheric pressure p 0 According to Bernoulli's equation
Due to the suction pressure p at the suction port of the vacuum pump 62 1 Less than 11 gas pressure p of 1 fissure of surrounding rock 2 And the gas in the surrounding rock 1 fracture 11 and the gas height h in the vacuum pump 62 1 ＝h 2 Substantially close, then u 1 ＞υ 2 I.e. gas in the fissures 11 of the surrounding rock 1 flows into the vacuum pump 62, the gas pressure p in the fissures 11 of the surrounding rock 1 2 Reducing the pressure difference delta p = p between the air pressure in the crack 11 of the surrounding rock 1 and the surface spraying material of the surrounding rock 1 0 -p 2 Spraying material at atmospheric pressure difference Δ p = p 0 -p 2 And entering the surrounding rock 1 cracks 11 under the action, gradually filling the surrounding rock 1 cracks 11, and solidifying the spraying material to achieve certain strength to finish the reinforcing of the surrounding rock 1.
In this embodiment, each operation cycle includes the following steps:
s001, tunneling: starting an operation cycle, adopting a partial section tunneling machine or a full-section tunneling machine to perform tunneling, wherein the surface of the surrounding rock 1 in the tunnel after tunneling has 5 states: 1) Class a state surrounding rock: the sprayed layer is solidified, and the surfaces of the atmospheric pressure temporary support, the negative pressure slurry pumping reinforcement and the anchor bolt permanent support are finished; 2) Class B state surrounding rock: the sprayed layer is solidified, and atmospheric pressure temporary support and negative pressure slurry pumping reinforcement are completed, but permanent support operation of the anchor rod is not carried out; 3) Class C state surrounding rock: the sprayed layer is solidified, but negative pressure air extraction and anchor bolt support operation are not carried out yet; 4) Class D state surrounding rock: the sprayed layer is not solidified and is attached to the surface of the surrounding rock 1 in a paste or fluid state; 5) Class E state surrounding rock: newly digging surrounding rock 1 formed by tunneling; for the surrounding rock in the A-type state, atmospheric pressure temporary support, negative pressure slurry pumping reinforcement and anchor rod permanent support are completed, and other steps are not required to be executed; for the surrounding rock in the B-type state, executing the step S005 after S001 is finished; for the surrounding rock in the C-type state, executing the step S005 after S001 is finished; for the D-type state surrounding rock, executing the step S004 after S001 is finished; for the surrounding rock in the E-type state, executing the step S002 after S001 is finished;
s002, cleaning the surface of the surrounding rock 1: supplying air through an air pipeline in the tunnel to clean coal dust and water attached to the surface of the surrounding rock in the E-type state; after S002, performing step S003;
s003, connecting a discharge outlet of the spraying system with a spraying pipeline, moving the spraying pipeline to spray the surface of the newly excavated surrounding rock 1, and executing the step S004 when the spraying material forms a D-type state on the surface of the surrounding rock 1;
s004, performing negative pressure air extraction on the spray layer section solidified near the surface of the surrounding rock in the D-type state to form negative pressure in the surrounding rock 1 fracture 11, forming pressure difference inside and outside the spray layer, sucking the unset spray layer in a paste or fluid state into the fracture 11 under the action of the negative pressure, and filling and reinforcing the surrounding rock 1 fracture 11; when the sprayed layer section is solidified, performing step S005;
s005, performing negative pressure air extraction on the solidified spray layer section, extracting the gas in the surrounding rock 1, forming a pressure difference on the inner surface and the outer surface of the spray layer, and providing temporary support for the roadway surrounding rock 1 by utilizing atmospheric pressure;
as shown in fig. 2 and fig. 3, the device for performing combined supporting of a roadway with a surface spraying and negative-pressure slurry pumping and filling fracture by applying the method for performing combined supporting of a roadway with a surface spraying and negative-pressure slurry pumping and filling fracture according to the embodiment of the invention includes a tunneling device 3, and a cleaning device 4, a spraying device 5 and an air extracting device 6 which are arranged behind the tunneling device 3 along the tunneling direction of the roadway, wherein the cleaning device 4 is used for cleaning the surface of the surrounding rock 1 of the roadway, the spraying device 5 is used for spraying the surface of the surrounding rock 1, and the air extracting device 6 is used for performing negative-pressure air extraction on the surrounding rock 1.
The roadway combined supporting device with the surface spraying and negative-pressure slurry pumping and crack filling comprises the following steps that firstly, a tunneling device 3 is adopted for tunneling, then a cleaning device 4 is used for cleaning coal dust and water on the surface of newly excavated surrounding rock 1, then the newly excavated surrounding rock 1 on a tunneling working surface 13 is sprayed through a spraying device 5, air is continuously pumped through an air pumping device 6 at the position where a spraying material is solidified behind the tunneling working surface 13 while the surrounding rock 1 is sprayed, so that negative pressure is formed in cracks 11 of the surrounding rock 1, pressure difference is formed inside and outside the spraying material, an unsolidified paste or fluid spraying layer is sucked into the cracks 11 under the action of the negative pressure, and the cracks 11 of the surrounding rock 1 are filled and reinforced. The method has the advantages that the combined reinforcement and support of the surface spraying and slurry pumping filling of the surrounding rock 1 of the roadway is realized, the time for waiting for the curing of the spraying material is reduced, the tunneling efficiency of the roadway is improved, meanwhile, the support can be timely provided for the surrounding rock 1 near the tunneling working face 13 of the roadway, and the stability of the surrounding rock 1 of the tunneling working face 13 is ensured.
According to one embodiment of the invention, the spraying device 5 comprises a spraying pipeline, a spraying moving device and a feeding device, wherein a discharge port of the spraying pipeline is arranged on the spraying moving device, and a feed port of the spraying pipeline is communicated with the cleaning device 4 or the feeding device so as to clean the surface of the surrounding rock or spray the spraying material on the surface of the surrounding rock. In this embodiment, the heading device 3 may be a partial section or full section heading machine, the cleaning device 4 may be a compressed air device or a water supply device to provide compressed air or water spray for cleaning the surface of the surrounding rock 1, the spraying moving device may be a mechanical arm, a discharge port of the spraying pipeline is connected to the mechanical arm, and the spraying pipeline is moved by the mechanical arm.
In the process of cleaning the surface of the surrounding rock 1 in the step S1, a compressed air device or a water supply device behind a feed inlet tunneling machine of the spraying pipeline is connected, and under the driving of a spraying mobile device, coal and water on the surface of the surrounding rock 1 can be cleaned; in the step S3, the spraying material is sprayed on the surface of the surrounding rock 1, and simultaneously the surrounding rock 1 is subjected to negative pressure air suction, so that in the process that the spraying material enters the cracks 11 of the surrounding rock 1, the feed inlet of the spraying pipeline can be connected with the discharge outlet of the feeding device, the feeding device continuously provides the spraying material for the spraying pipeline, and the spraying material is sprayed on the surface of the surrounding rock 1 under the driving of the spraying moving device.
In this embodiment, as shown in fig. 3, the air extracting device 6 includes an air extracting pipeline 63, a vacuum pump 62 and an air extracting moving device, one end of the air extracting pipeline 63 is connected to the vacuum pump 62, the other end of the air extracting pipeline 63 is connected to the air extracting moving device, the heading working face 13 is located in front of the heading direction of the heading device 3, the support systems are located behind the heading working face 13, and the air extracting moving device drives the air extracting pipeline 63 to advance step by step as the heading work advances continuously. And S3, performing negative-pressure air extraction on the surrounding rock 1 to enable the spraying material to enter the cracks 11 of the surrounding rock 1, starting a vacuum pump 62 when the surrounding rock 1 is temporarily supported by atmospheric pressure, and performing negative-pressure air extraction on the surrounding rock 1 through an air extraction pipeline 63.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A roadway combined supporting method of surface spraying and negative-pressure slurry pumping and crack filling is characterized in that: the method comprises the following steps:
and (3) spraying treatment: spraying the surface of the surrounding rock along the tunneling direction of the roadway to form a spraying layer on the surface of the surrounding rock;
slurry pumping treatment: carrying out negative pressure air extraction on the cracks of the surrounding rocks of which the surface is provided with the spraying layer so as to enable the spraying material in the spraying layer in a paste or fluid state to enter the cracks of the surrounding rocks;
continuously performing the spraying treatment in front of the slurry pumping treatment along the tunneling direction of the roadway;
in the spraying treatment, an air exhaust hole is formed in the spraying layer, so that negative pressure air exhaust is performed on the cracks of the surrounding rock through the air exhaust hole in the slurry pumping treatment.
2. The roadway combined supporting method for filling the cracks by surface spraying and negative-pressure slurry pumping according to claim 1, which is characterized in that: in the slurry pumping treatment, a sucker is arranged at the air pumping hole, and the air pumping device is connected with the sucker to perform negative pressure air pumping on the surrounding rock cracks.
3. A device for performing combined supporting of a roadway with a surface spraying and negative pressure slurry pumping and filling fracture by applying the combined supporting method of the roadway with the surface spraying and negative pressure slurry pumping and filling fracture according to the claim 1 or 2, which is characterized in that: including the tunnelling device and along the tunnelling direction in the cleaning device, spraying device and the air exhaust device of tunnelling device rear, cleaning device is used for the clearance the surface of the country rock in tunnel, spraying device is used for right the country rock surface carries out the spraying, air exhaust device is used for right the country rock carries out the negative pressure and bleeds.
4. The roadway combined supporting device for surface spraying and negative-pressure slurry pumping and crack filling according to claim 3, characterized in that: the spraying device includes spraying pipeline, spraying mobile device and feeder equipment, the discharge gate of spraying pipeline set up in on the spraying mobile device, the feed inlet of spraying pipeline with cleaning device or feeder equipment intercommunication to the surface of clearance country rock or with the surface of coating material spraying in country rock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| JP2006046062A (en) * | 2004-06-30 | 2006-02-16 | Taiheiyo Material Kk | Spray device and spraying method |
| CN101864967A (en) * | 2010-06-13 | 2010-10-20 | 中国矿业大学 | Strengthening and reinforcing method of high-ground-pressure soft rock laneway by hierarchical grouting |
| CN103912285A (en) * | 2014-03-27 | 2014-07-09 | 神华集团有限责任公司 | Coal mine roadway blocking method |
| CN204754935U (en) * | 2015-06-19 | 2015-11-11 | 中交一公局第三工程有限公司 | Novel karst area V level country rock section tunnel excavation equipment |
| CN109458213A (en) * | 2018-11-29 | 2019-03-12 | 河南焦煤能源有限公司 | A kind of high position extraction lane bottom plate automatic leak detection and blocking method |
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|---|---|---|---|---|
| JP2006046062A (en) * | 2004-06-30 | 2006-02-16 | Taiheiyo Material Kk | Spray device and spraying method |
| CN101864967A (en) * | 2010-06-13 | 2010-10-20 | 中国矿业大学 | Strengthening and reinforcing method of high-ground-pressure soft rock laneway by hierarchical grouting |
| CN103912285A (en) * | 2014-03-27 | 2014-07-09 | 神华集团有限责任公司 | Coal mine roadway blocking method |
| CN204754935U (en) * | 2015-06-19 | 2015-11-11 | 中交一公局第三工程有限公司 | Novel karst area V level country rock section tunnel excavation equipment |
| CN109458213A (en) * | 2018-11-29 | 2019-03-12 | 河南焦煤能源有限公司 | A kind of high position extraction lane bottom plate automatic leak detection and blocking method |
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