CN112647998B - Tunneling roadway ventilation method and coal mine roadway system - Google Patents
Tunneling roadway ventilation method and coal mine roadway system Download PDFInfo
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- CN112647998B CN112647998B CN202011483786.9A CN202011483786A CN112647998B CN 112647998 B CN112647998 B CN 112647998B CN 202011483786 A CN202011483786 A CN 202011483786A CN 112647998 B CN112647998 B CN 112647998B
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- 230000005641 tunneling Effects 0.000 title claims abstract description 194
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000009423 ventilation Methods 0.000 title claims abstract description 38
- 239000003245 coal Substances 0.000 title claims abstract description 31
- 230000004888 barrier function Effects 0.000 claims description 21
- 238000004804 winding Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims 2
- 239000000428 dust Substances 0.000 abstract description 13
- 230000006378 damage Effects 0.000 abstract description 9
- 230000036541 health Effects 0.000 abstract description 9
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- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
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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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/14—Air partitions; Air locks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides a tunneling roadway ventilation method and a coal mine roadway system, and relates to the technical field of coal mine ventilation. The tunneling roadway ventilation method comprises the following steps: arranging a windbreak in a tunneling roadway, wherein the first end of the windbreak is positioned at a first position, and the length of the windbreak is continuously lengthened along with the advancing of a tunneling machine so as to keep the second end of the windbreak consistent with the tail end of the tunneling machine until the tunneling head of the tunneling roadway passes through a preset distance L of a return air roadway; the space of the tunneling roadway, which is positioned at the two sides of the windbreak, is respectively provided with a first air inlet channel and a first air return channel, and the first air inlet channel and the first air return channel are communicated with the transportation roadway. The coal mine tunnel system can adopt the tunneling tunnel ventilation method. The ventilation method can effectively reduce the concentration of the dirty gas in the tunneling roadway, thereby reducing the potential safety hazard in the tunneling roadway, improving the safety of the operating environment of operators, and reducing the damage of gas, dust and the like to the health of the operators.
Description
Technical Field
The invention relates to the technical field of coal mine ventilation, in particular to a tunneling roadway ventilation method and a coal mine roadway system.
Background
The existing tunneling tunnel mainly conveys fresh air to the tunneling tunnel through full-wind-pressure ventilation or local-wind-pressure ventilation, and discharges dirty gas containing gas, dust and the like in the tunneling tunnel so as to reduce the concentration of the gas and the dust in the tunneling tunnel, thereby reducing potential safety hazards in the tunneling tunnel, improving the working safety of operators in the tunneling tunnel and reducing the harm of the dirty gas to the health of the operators. However, the ventilation effect in the existing tunneling roadway is poor, and potential safety hazards caused by dirty gas in the tunneling roadway and health injuries to operators are still large.
Disclosure of Invention
The invention aims to provide a tunneling roadway ventilation method and a coal mine roadway system, which are used for solving the technical problems that the existing tunneling roadway has poor ventilation effect, potential safety hazards caused by dirty gas in the tunneling roadway and still has great health injury to operators.
In order to solve the problems, the invention provides a tunneling roadway ventilation method which is applied to ventilation in a tunneling roadway driving process in a coal mine roadway system, wherein the coal mine roadway system comprises a transportation roadway and a return air roadway, a tunneling machine is used for driving a tunneling roadway from a first position of the transportation roadway along a tunneling direction, and the tunneling roadway ventilation method comprises the following steps:
setting a windbreak in the tunneling roadway, wherein the first end of the windbreak is positioned at a first position, and the length of the windbreak is continuously lengthened along with the advancing of the tunneling machine so as to keep the second end of the windbreak consistent with the tail end of the tunneling machine until the tunneling head of the tunneling roadway passes through the preset distance L of the return air roadway; the tunneling roadway is characterized in that the space of the tunneling roadway, which is located at two sides of the windbreak, is respectively provided with a first air inlet channel and a first air return channel, and the first air inlet channel and the first air return channel are communicated with the transportation roadway.
Optionally, the roadway section of the tunneling roadway corresponding to the tunneling machine is a head-on section, a first air duct is arranged on the head-on section, the length direction of the first air duct is kept consistent with the tunneling direction, and one end of the first air duct, which is away from the head-on of the tunneling, extends into the first air inlet channel;
and moving the first air duct forwards along with the advance of the heading machine, and keeping the first air duct always in a head-on section.
Optionally, a first air adjusting window is arranged in the first air return channel, and the first air adjusting window is used for adjusting the air quantity of the first air return channel.
Optionally, a deflector is disposed at the first end of the windbreak, the deflector extending into the transportation roadway and being inclined towards the upstream of the transportation roadway.
Optionally, a local ventilator is installed in the transportation roadway, an air outlet end of the local ventilator is connected with a second air duct, and an air outlet end of the second air duct extends into the first air inlet channel.
Optionally, an air door is arranged in the first air inlet channel, and the second air duct passes through the air door.
Optionally, when the tunneling head reaches a second position and the distance between the second position and the return air roadway is equal to the preset distance L, a return air bypass communicated with the return air roadway is excavated from the second position of the tunneling roadway, wherein a roadway section of the tunneling roadway between the transportation roadway and the return air bypass is a first roadway section, and a roadway section of the tunneling roadway crossing the second position is a second roadway section;
removing a windbreak in the first tunnel section, and arranging the windbreak in the second tunnel section, wherein the first end of the windbreak is positioned at a second position, and the length of the windbreak is continuously lengthened along with the advancing of the heading machine so as to keep the second end of the windbreak consistent with the tail end of the heading machine; the second roadway section is located in the space on two sides of the windbreak and is respectively provided with a second air inlet channel and a second air return channel, the second air return channel is communicated with the air return winding channel, and the second air inlet channel is communicated with the first roadway section.
Optionally, a second adjusting air window is arranged in the return air winding way, and the second adjusting air window is used for adjusting the air quantity of the return air winding way.
Optionally, the windbreak comprises a support frame, the support frame is covered with a diaphragm, and a first sealing body is arranged between the top end of the support frame and the top plate of the tunneling roadway; and a second sealing body is arranged between the bottom end of the supporting frame and the bottom plate of the tunneling roadway.
The invention also provides a coal mine tunnel system, which comprises a transportation tunnel, a return air tunnel and a tunneling tunnel, wherein one end of the tunneling tunnel, which is away from a tunneling head, is communicated with the first position of the transportation tunnel, and the distance of the tunneling head, which passes through the return air tunnel, is smaller than a preset distance L along the tunneling direction; the tunneling roadway is internally provided with a windbreak extending along the tunneling direction, the first end of the windbreak is positioned at a first position, and the second end of the windbreak is consistent with the tail end of the tunneling machine; the tunneling roadway is located in the space on two sides of the windbreak, wherein the space is provided with a first air inlet channel and a first air return channel respectively, and the first air inlet channel and the first air return channel are communicated with the transportation roadway.
The invention also provides a coal mine tunnel system, which comprises a transportation tunnel, a return air tunnel and a tunneling tunnel, wherein one end of the tunneling tunnel, which is away from a tunneling head, is communicated with the first position of the transportation tunnel, and the distance of the tunneling head, which passes through the return air tunnel, is greater than a preset distance L along the tunneling direction; the second position of the tunneling roadway is communicated with the return air roadway through a return air winding passage, the distance between the second position and the return air roadway is equal to the preset distance L, a roadway section of the tunneling roadway between the transportation roadway and the return air winding passage is a first roadway section, and a roadway section of the tunneling roadway crossing the second position is a second roadway section;
the second roadway section is internally provided with a windbreak extending along the tunneling direction of the windbreak, the first end of the windbreak is positioned at a second position, and the second end of the windbreak is consistent with the tail end of the tunneling machine; the second roadway section is located in the space on two sides of the windbreak and is respectively provided with a second air inlet channel and a second air return channel, the second air return channel is communicated with the air return winding channel, and the second air inlet channel is communicated with the first roadway section.
According to the ventilation method for the tunneling tunnel, in the tunneling process of the tunneling machine, the windshields can be lengthened continuously along with the advancing of the tunneling machine, the tunneling tunnel is always divided into two relatively independent channels, fresh air flow is arranged in the first air inlet channel, dirty air flow is discharged from the first air return channel, the fresh air flow and the dirty air flow from different channels, interference among the fresh air flow and the dirty air flow is less, gas, dust and the like in the tunneling tunnel are effectively discharged, the concentration of dirty gas in the tunneling tunnel is reduced, potential safety hazards in the tunneling tunnel are further reduced, and the safety of an operating environment of an operator is improved; in addition, operating personnel can be located one side of first air inlet passageway at the section of meeting one's head to ensure that operating personnel can be in fresh air flow, corresponding improvement operating personnel's work comfort level, and reduce harm that gas, dust etc. caused to operating personnel's health.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a first form of a coal mine roadway system provided by the invention;
FIG. 2 is a schematic diagram of a second form of the coal mine roadway system provided by the invention;
FIG. 3 is a schematic diagram of a third form of the coal mine roadway system provided by the invention;
fig. 4 is a connection section view of a windbreak and a tunneling roadway in the tunneling roadway ventilation method provided by the invention.
Reference numerals illustrate:
10-a coal mine tunnel system; 20-a heading machine; 100-transportation roadway; 110-a first position; 120-a first conveying roadway; 130-a second conveying roadway; 200-return air tunnel; 210-return air detour; 300-tunneling a roadway; 310-a first air inlet channel; 320-a first return air channel; 330-head-on segment; 340-a first roadway section; 350-a second roadway section; 351-a second air inlet channel; 352-second return air duct; 360-a second position; 370-top plate; 380-a bottom plate; 390-tunneling head-on; 400-windbreak; 410-supporting frame; 420-a separator; 430-a first seal; 440-a second seal; 500-deflector; 600-a first air duct; 710-a first adjustment window; 720-a second adjusting louver; 800—an local ventilator; 810-a second wind barrel; 900-damper.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment provides a ventilation method of a tunneling roadway, which is applied to ventilation of a tunneling roadway 300 in a coal mine roadway system 10 in a tunneling process, wherein the coal mine roadway system 10 comprises a transportation roadway 100 and a return roadway 200, a tunneling machine 20 is used for tunneling the tunneling roadway 300 along a tunneling direction from a first position 110 of the transportation roadway 100, and as shown in fig. 1 and 2, the ventilation method of the tunneling roadway comprises the following steps: arranging an air barrier 400 in the tunneling roadway 300, wherein a first end of the air barrier 400 is positioned at a first position 110, and the length of the air barrier 400 is continuously lengthened along with the advancing of the tunneling machine 20 so as to keep the second end of the air barrier 400 consistent with the tail end of the tunneling machine 20 until a tunneling head 390 of the tunneling roadway 300 passes over a preset distance L of the return air roadway 200; the space of the tunneling roadway 300 at two sides of the windbreak 400 is respectively a first air inlet channel 310 and a first air return channel 320, and the first air inlet channel 310 and the first air return channel 320 are communicated with the transportation roadway 100.
The conveying tunnel in the coal mine tunnel system 10 is used for conveying equipment, materials, coal and the like, and the end part of the return air tunnel 200 is connected with an induced draft fan 800 for exhausting air outwards; the development machine 20 enters the conveying tunnel and digs the development tunnel 300 along the development direction at the first position 110, an air barrier 400 is arranged at the communication position of the conveying tunnel and the development tunnel 300, the air barrier 400 extends along the length direction of the development tunnel 300 and divides the development tunnel 300 into a first air inlet channel 310 and a first air return channel 320, the length of the development tunnel 300 is continuously increased along with the advance of the development machine 20, the air barrier 400 is required to be continuously lengthened, the length of the air barrier 400 is correspondingly increased with the development tunnel 300, the second end of the air barrier 400 can be ensured to extend to the tail end of the development machine 20 all the time, and the area at the rear side of the development machine 20 can be effectively separated. In the process of digging by the heading machine 20, external fresh air flows into the transportation roadway 100 under the action of the main fan, when fresh air flows to the intersection of the transportation roadway 100 and the tunneling roadway 300, the fresh air can flow into the first air inlet channel 310, flows to the head-on section 330 where the heading machine 20 is located along the first air inlet channel 310, bypasses the heading machine 20, brings dirty gas in the area into the first return air channel 320, flows into the transportation roadway 100 through the communication part of the first return air channel 320 and the transportation roadway 100, flows to the subsequent roadway along with the air flow in the transportation roadway 100, and is finally discharged through the return air roadway 200.
The windbreak 400 can be lengthened continuously along with the advance of the heading machine 20, the heading roadway 300 is always divided into two relatively independent channels, fresh air flows are arranged in the first air inlet channel 310, the dirty air flows are discharged from the first air return channel 320, the fresh air flows and the dirty air flows flow from different channels, interference among the fresh air flows and the dirty air flows is small, gas, dust and the like in the heading roadway 300 are effectively discharged, the concentration of dirty gas in the heading roadway 300 is reduced, potential safety hazards in the heading roadway 300 are further reduced, and the safety of the operating environment of operators is improved; in addition, an operator can perform construction operation on one side of the head-on section 330 located on the first air inlet channel 310, so that the operator can be ensured to be in fresh air flow, the working comfort of the operator is correspondingly improved, and the damage to the health of the operator caused by gas, dust and the like is reduced.
The ventilation method is suitable for the distance that the tunneling head 390 of the tunneling roadway 300 passes over the return roadway 200 along the tunneling direction is smaller than the preset distance L, specifically, the preset distance L is greater than 20m, and preferably may be 20m to 50m.
In this embodiment, the roadway section of the tunneling roadway 300 corresponding to the tunneling machine 20 is a head-on section 330, a first air duct 600 is arranged on the head-on section 330, and the length direction of the first air duct 600 is kept consistent with the tunneling direction, and one end of the first air duct 600, which is away from the tunneling head 390, extends into the first air inlet channel 310; as heading machine 20 advances, first wind tunnel 600 is moved forward, maintaining first wind tunnel 600 always in head-on section 330. Because the heading machine 20 is located in the head-on section 330, the second end of the windbreak 400 cannot separate the region where the head-on section 330 is located, a first air duct 600 is arranged on one side of the head-on section located in the first air inlet channel 310, one end of the first air duct 600, which is away from the heading head 390, extends into the first air inlet channel 310, and part of fresh air flow of the first air inlet channel 310 directly flows into the head-on section 330 to blow dirty gas in the region; the other part of fresh air flows into the first air duct 600 and is blown out towards the tunneling head-on 390 from one end of the tunneling head-on 390 towards the first air duct 600, so that the air quantity of the tunneling head-on 390 area is effectively increased, and the dirty air of the head-on section is fully and effectively blown into the first return air channel 320, so that the dirty air is fully discharged. Along with the tunneling of the heading machine 20, the first air duct 600 can be continuously moved to be always kept at the head-on section 330, so that the air quantity of the first air duct 600 at the tunneling head 390 is correspondingly ensured.
In this embodiment, as shown in fig. 1, a first air adjusting window 710 may be disposed in the first air return duct 320, where the first air adjusting window 710 is used to adjust the air volume of the first air return duct 320. Fresh air flows through the first air inlet channel 310 and the first air return channel 320 to ventilate the tunneling roadway 300, and the ventilation area of the first air return channel 320 can be adjusted through the first air adjusting window 710, so that the air quantity of the first air return channel 320 is adjusted, dirty air in the tunneling roadway 300 can be effectively discharged, and ineffective loss caused by overlarge air quantity in the tunneling roadway 300 to the air pressure of the transportation roadway 100 is reduced. In addition, the first air adjusting window 710 is installed in the first air return channel 320, so that on the basis of realizing the air volume adjustment of the first air inlet channel 310 and the first air return channel 320, the blockage of the first air inlet channel 310 caused by the installation of the first air adjusting window 710 can be reduced, and the transportation of equipment, coal and the like in the first air inlet channel 310 is ensured.
In this embodiment, as shown in fig. 1, a deflector 500 may be disposed at a first end of the windbreak 400, and the deflector 500 extends into the transportation roadway 100 and is inclined toward the upstream of the transportation roadway 100. Fresh air flow of the transportation tunnel 100 flows from the upstream to the downstream, the guide plate 500 stretches into the transportation tunnel 100 and incompletely blocks the transportation tunnel 100, the guide plate 500 inclines towards the upstream of the transportation tunnel 100 to form an air inlet with an opening towards the upstream direction, and when the fresh air flow of the transportation tunnel 100 flows to the first position 110, the fresh air flow can fully flow into the first air inlet channel 310 through the air inlet, so that the air inlet quantity of the transportation tunnel 100 to the first air inlet channel 310 is ensured, and the discharge of dirty gas in the tunneling tunnel 300 is ensured.
In this embodiment, as shown in fig. 1, a local ventilator 800 may be installed in the transportation roadway 100, and an air outlet end of the local ventilator 800 is connected with a second air duct 810, where the air outlet end of the second air duct 810 extends into the first air inlet channel 310. When the air volume in the first air intake passage 310 is large enough, the local ventilator 800 may be turned off; when the air quantity in the first air inlet channel 310 is smaller and the discharge requirement of the dirty air in the tunneling roadway 300 cannot be met, the local ventilator 800 can be started to increase the air quantity of the first air inlet channel 310 and ensure the discharge of the dirty air in the tunneling roadway 300; the second air duct 810 extends into the first air inlet channel 310, so that an air supplementing effect of the local ventilator 800 on the first air inlet channel 310 can be effectively ensured. Preferably, a damper 900 may be disposed in the first air intake passage 310, and the second air duct 810 penetrates through the damper 900, so as to reduce fresh air flow pressed by the local air fan 800 from outside the second air duct 810 to return to the transportation roadway 100 without passing through the head-on section 330.
In this embodiment, as shown in fig. 3, when the heading head 390 reaches the second position 360 and the distance between the second position 360 and the return air roadway 200 is equal to the preset distance L, the return air detour 210 communicating with the return air roadway 200 can be excavated from the second position 360 of the heading roadway 300, wherein the roadway section of the heading roadway 300 between the transportation roadway 100 and the return air detour 210 is the first roadway section 340, and the roadway section of the heading roadway 300 passing over the second position 360 is the second roadway section 350; removing the windbreak 400 in the first roadway section 340, and arranging the windbreak 400 in the second roadway section 350, wherein the first end of the windbreak 400 is positioned at the second position 360, and the length of the windbreak 400 is continuously lengthened along with the advancing of the heading machine 20 so as to keep the second end of the windbreak 400 consistent with the tail end of the heading machine 20; the second tunnel section 350 is located in the space on two sides of the windbreak 400 and is respectively provided with a second air inlet channel 351 and a second air return channel 352, the second air return channel 352 is communicated with the air return winding channel 210, and the second air inlet channel 351 is communicated with the first tunnel section 340.
Along with the tunneling of the heading machine 20, when the tunneling head 390 passes over the return tunnel 200 and the distance between the tunneling head 390 and the return tunnel 200 is a preset distance L, setting the position as a second position 360, and tunneling the return air detour 210 towards the return tunnel 200 at the second position 360; the original wind barrier 400 in the tunneling wind channel is removed, the wind barrier 400 is installed in the second tunnel section 350, the first end of the wind barrier 400 is blocked at the intersection of the return wind bypass 210 and the tunneling tunnel 300, the second end of the wind barrier 400 is connected to the tail end of the tunneling machine 20, and the wind barrier 400 extends along the length direction of the second tunnel section 350, so that the second tunnel section 350 is divided into two relatively independent channels, wherein the channel positioned on one side of the return wind bypass 210 is a second return wind channel 352, the channel positioned on the other side of the return wind bypass is a second air inlet channel 351, and the second air inlet channel 351 is communicated with the first tunnel section 340. In the tunneling process of the heading machine 20, the air return tunnel 200 is connected with the main blower, the air pressure in the air return tunnel 200 is lower, a suction effect is correspondingly generated on the second air return passage 352 and the second air inlet passage 351, part of fresh air in the transportation tunnel 100 flows into the first tunnel section 340 under the suction effect, then flows into the second air inlet passage 351, then flows into the head-on section 330 and bypasses the heading machine 20 to blow the dirty gas of the head-on section 330 into the second air return passage 352, and then blows the dirty gas into the air return tunnel 200 through the air return winding passage 210, so that the discharge of the dirty gas in the tunneling tunnel 300 is completed. When the windbreak 400 of the first roadway section 340 is removed, if the first return air channel 320 is provided with the first adjusting wind window 710, the first adjusting wind window 710 can be removed together.
The windbreak 400 can be lengthened continuously along with the advance of the heading machine 20, the heading roadway 300 is always divided into two relatively independent channels, fresh air flows are arranged in the second air inlet channel 351, the dirty air flows are discharged from the second air return channel 352, the fresh air flows and the dirty air flows flow from different channels, interference among the fresh air flows and the dirty air flows is less, and therefore gas, dust and the like in the heading roadway 300 are effectively discharged, and the safety of the operating environment of operators is improved; in addition, the operator can be located at one side of the second air inlet channel 351 at the head-on section 330 for construction operation, so that the operator can be ensured to be in fresh air flow, the working comfort of the operator is correspondingly improved, and the damage to the health of the operator caused by gas, dust and the like is reduced.
When the second tunnel section 350 is ventilated, the second position 360 passes over the air return tunnel 200 by the preset distance L, and the air flow in the second air return channel 352 flows through the air return winding passage 210 and flows into the air return tunnel 200, so that the turning angle of the air flow is smaller, the resistance of the air flow when the air flow flows into the air return winding passage 210 and flows into the air return tunnel 200 can be effectively reduced, the circulation smoothness of the air flow is ensured, and the discharge of dirty air is correspondingly ensured. Preferably, as shown in fig. 3, the return air bypass 210 is located above the tunnelling roadway 300.
In this embodiment, as shown in fig. 3, a second adjusting air window 720 may be disposed in the return air duct 210, where the second adjusting air window 720 is used to adjust the air volume of the return air duct 210. In the process of ventilating the tunneling roadway 300 by fresh air flowing through the second air inlet channel 351 and the second air return channel 352, the ventilation area of the air return winding channel 210 can be adjusted through the second air adjusting window 720, so that the air quantity of the second air return channel 352 is adjusted, dirty air in the tunneling roadway 300 can be effectively discharged, and ineffective loss caused by overlarge air quantity in the tunneling roadway 300 to the air pressure of the air return roadway 200 is reduced.
In this embodiment, as shown in fig. 4, the windbreak 400 may include a support frame 410, where the support frame 410 is covered with a diaphragm 420, and a first sealing body 430 is disposed between the top end of the support frame 410 and the top plate 370 of the tunneling roadway 300; a second seal 440 is provided between the bottom end of the support frame 410 and the floor 380 of the roadway 300. Here, a specific form of the windbreak 400 is that, the support frame 410 can play a supporting role on the diaphragm 420, and the first sealing body 430 between the top end of the support frame 410 and the top plate 370 can improve the connection tightness between the support frame 410 and the top plate 370, and the second sealing body 440 between the bottom end of the support frame 410 and the bottom plate 380 can improve the connection tightness between the support frame 410 and the bottom plate 380, so that the relative air tightness of the windbreak 400 for separating the tunneling roadway 300 into two channels is improved, and adverse effects of polluted air in the return channel on fresh air flow in the air inlet channel are reduced. Specifically, the support frame 410 and the diaphragm 420 form a spacer with a certain length, and when in installation, a plurality of relatively independent spacers are placed along the length direction of the tunneling roadway 300 to jointly form the windbreak 400, and along with tunneling of the tunneling machine 20, the number of the spacers is continuously increased to continuously increase the length of the windbreak 400; in addition, support frame 410 may be in a collapsible form, and support frame 410 may be lengthened to increase the length of windbreak 400 as heading machine 20 proceeds. Specifically, the first sealing body 430 may use a sprayable sealing material, and the second sealing body 440 may use pulverized coal or other sealing materials.
The embodiment also provides a coal mine tunnel system 10, as shown in fig. 1 and 2, including a transportation tunnel 100, a return air tunnel 200 and a tunneling tunnel 300, wherein one end of the tunneling tunnel 300, which is away from a tunneling head 390, is communicated with a first position 110 of the transportation tunnel 100, and the distance of the tunneling head 390, which passes over the return air tunnel 200, is smaller than a preset distance L along the tunneling direction; a windbreak 400 extending along the tunneling direction of the tunneling roadway 300 is arranged in the tunneling roadway 300, a first end of the windbreak 400 is positioned at a first position 110, and a second end of the windbreak 400 is consistent with the tail end of the tunneling machine 20; the tunneling roadway 300 is located in the space on two sides of the windbreak 400 and is provided with a first air inlet channel 310 and a first air return channel 320, and the first air inlet channel 310 and the first air return channel 320 are communicated with the transportation roadway 100. The coal mine tunnel system 10 can adopt the ventilation method for the first tunnel section 340 in the ventilation method of the tunneling tunnel, can effectively discharge gas, dust and the like in the tunneling tunnel 300, and reduces the concentration of dirty gas in the tunneling tunnel 300, thereby reducing the potential safety hazard in the tunneling tunnel 300 and improving the safety of the operating environment of operators; moreover, an operator can perform construction operation on one side of the head-on section 330 located on the first air inlet channel 310, so that the operator is ensured to be in fresh air flow, the working comfort of the operator is correspondingly improved, and the damage to the health of the operator caused by gas, dust and the like is reduced.
The embodiment also provides a coal mine tunnel system 10, as shown in fig. 3, including a transportation tunnel 100, a return air tunnel 200 and a tunneling tunnel 300, wherein one end of the tunneling tunnel 300, which is away from a tunneling head 390, is communicated with a first position 110 of the transportation tunnel 100, and the distance of the tunneling head 390, which passes over the return air tunnel 200, is greater than a preset distance L along the tunneling direction; the second position 360 of the tunneling roadway 300 is communicated with the return air roadway 200 through the return air detour 210, the distance between the second position 360 and the return air roadway 200 is equal to the preset distance L, wherein the roadway section of the tunneling roadway 300 between the transportation roadway 100 and the return air detour 210 is a first roadway section 340, and the roadway section of the tunneling roadway 300 passing over the second position 360 is a second roadway section 350; a windbreak 400 extending along the tunneling direction of the second roadway section 350 is arranged in the second roadway section 350, the first end of the windbreak 400 is positioned at the second position 360, and the second end of the windbreak 400 is consistent with the tail end of the tunneling machine 20; the second tunnel section 350 is located in the space on two sides of the windbreak 400 and is respectively provided with a second air inlet channel 351 and a second air return channel 352, the second air return channel 352 is communicated with the air return winding channel 210, and the second air inlet channel 351 is communicated with the first tunnel section 340. The coal mine tunnel system 10 can adopt the ventilation method for the second tunnel section 350 in the ventilation method of the tunneling tunnel, can effectively discharge gas, dust and the like in the tunneling tunnel 300, and reduces the concentration of dirty gas in the tunneling tunnel 300, thereby reducing the potential safety hazard in the tunneling tunnel 300 and improving the safety of the operating environment of operators; and, the operating personnel can be located one side of second air inlet channel 351 at head-on section 330 and carry out construction operation to ensure that operating personnel can be in fresh air flow, corresponding improvement operating personnel's work comfort level, and reduce harm that gas, dust etc. caused to operating personnel's health.
Specifically, as shown in fig. 1, the transportation roadway 100 may be one, and the transportation roadway 100 is used for transportation of equipment, materials, coal and the like; as shown in fig. 2 and 3, there may be two transport roadways 100, where the two transport roadways 100 are a first transport roadway 120 and a second transport roadway 130, respectively, where the first transport roadway 120 is used for transporting coal, the second transport roadway 130 is used for transporting equipment and materials, the first transport roadway 120 is communicated with the second transport roadway 130, the heading machine 20 digs a heading roadway 300 at a first position 110 of the second transport roadway 130, and when dig a first roadway section 340, a first end of the windbreak 400 is located at an intersection of the second transport roadway 130 and the first roadway section 340.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A tunneling roadway ventilation method applied to ventilation of a tunneling roadway (300) in a coal mine roadway system (10), wherein the coal mine roadway system (10) comprises a transportation roadway (100) and a return roadway (200), a tunneling machine (20) is used for tunneling the tunneling roadway (300) along a tunneling direction from a first position (110) of the transportation roadway (100), and the tunneling roadway ventilation method is characterized by comprising the following steps:
arranging an air barrier (400) in the tunneling roadway (300), wherein the first end of the air barrier (400) is positioned at a first position (110), and the length of the air barrier (400) is continuously lengthened along with the advancing of the tunneling machine (20) so as to keep the second end of the air barrier (400) consistent with the tail end of the tunneling machine (20) until a tunneling head (390) of the tunneling roadway (300) passes through the air return roadway (200) by a preset distance L; the space of the tunneling roadway (300) at two sides of the windbreak (400) is respectively a first air inlet channel (310) and a first air return channel (320), and the first air inlet channel (310) and the first air return channel (320) are communicated with the transportation roadway (100);
when the tunneling head (390) reaches a second position (360) and the distance between the second position (360) and the return air roadway (200) is equal to the preset distance L, a return air roadway (210) communicated with the return air roadway (200) is dug from the second position (360) of the tunneling roadway (300), wherein a roadway section of the tunneling roadway (300) between the transportation roadway (100) and the return air roadway (210) is a first roadway section (340), and a roadway section of the tunneling roadway (300) crossing the second position (360) is a second roadway section (350);
removing a windbreak (400) in the first roadway section (340), and arranging the windbreak (400) in the second roadway section (350), wherein the first end of the windbreak (400) is positioned at a second position (360), and the length of the windbreak (400) is continuously lengthened along with the advancing of the heading machine (20) so as to keep the second end of the windbreak (400) consistent with the tail end of the heading machine (20); the second roadway section (350) is located in the space on two sides of the windbreak (400) and is provided with a second air inlet channel (351) and a second air return channel (352) respectively, the second air return channel (352) is communicated with the air return winding channel (210), and the second air inlet channel (351) is communicated with the first roadway section (340).
2. The tunneling roadway ventilation method according to claim 1, characterized in that a roadway section of the tunneling roadway (300) corresponding to the tunneling machine (20) is a head-on section (330), a first air duct (600) is arranged on the head-on section (330), the length direction of the first air duct (600) is kept consistent with the tunneling direction, and one end of the first air duct (600) facing away from the tunneling head (390) extends into the first air inlet channel (310);
and moving the first air duct (600) forwards along with the advancing of the heading machine (20), and keeping the first air duct (600) at the head-on section (330) all the time.
3. The tunneling roadway ventilation method according to claim 1, characterized in that a first regulation air window (710) is provided in the first return air passage (320), and the first regulation air window (710) is used for regulating the air volume of the first return air passage (320).
4. The tunneling roadway ventilation method of claim 1, characterized in that a deflector (500) is provided at a first end of the windbreak (400), the deflector (500) extending into the haulage roadway (100) and being inclined upstream of the haulage roadway (100).
5. The tunneling roadway ventilation method according to claim 1, characterized in that a local ventilator (800) is installed in the transportation roadway (100), an air outlet end of the local ventilator (800) is connected with a second air duct (810), and an air outlet end of the second air duct (810) extends into the first air inlet channel (310).
6. The tunneling roadway ventilation method according to claim 1, characterized in that a second regulation air window (720) is provided in the return air bypass (210), the second regulation air window (720) being used for regulating the air volume of the return air bypass (210).
7. The tunneling roadway ventilation method of any one of claims 1-5, characterized in that the windbreak (400) comprises a support frame (410), the support frame (410) is covered with a diaphragm (420), and a first sealing body (430) is arranged between the top end of the support frame (410) and the top plate (370) of the tunneling roadway (300); a second sealing body (440) is arranged between the bottom end of the supporting frame (410) and the bottom plate (380) of the tunneling roadway (300).
8. The coal mine tunnel system is characterized by comprising a transportation tunnel (100), an air return tunnel (200) and a tunneling tunnel (300), wherein one end of the tunneling tunnel (300) away from a tunneling head (390) is communicated with a first position (110) of the transportation tunnel (100), and the distance of the tunneling head (390) crossing the air return tunnel (200) is greater than a preset distance L along the tunneling direction; the second position (360) of the tunneling roadway (300) is communicated with the return air roadway (200) through a return air detour (210), the distance between the second position (360) and the return air roadway (200) is equal to the preset distance L, wherein a roadway section of the tunneling roadway (300) between the transportation roadway (100) and the return air detour (210) is a first roadway section (340), and a roadway section of the tunneling roadway (300) crossing the second position (360) is a second roadway section (350);
an air barrier (400) extending along the tunneling direction of the second roadway section (350) is arranged in the second roadway section, the first end of the air barrier (400) is located at a second position (360), and the second end of the air barrier (400) is consistent with the tail end of the tunneling machine (20); the second roadway section (350) is located in the space on two sides of the windbreak (400) and is provided with a second air inlet channel (351) and a second air return channel (352) respectively, the second air return channel (352) is communicated with the air return winding channel (210), and the second air inlet channel (351) is communicated with the first roadway section (340).
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