CN101975076A - Structure for preventing coal and gas outburst and method for preventing outburst - Google Patents
Structure for preventing coal and gas outburst and method for preventing outburst Download PDFInfo
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- CN101975076A CN101975076A CN 201010293731 CN201010293731A CN101975076A CN 101975076 A CN101975076 A CN 101975076A CN 201010293731 CN201010293731 CN 201010293731 CN 201010293731 A CN201010293731 A CN 201010293731A CN 101975076 A CN101975076 A CN 101975076A
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Abstract
The invention provides a structure for preventing coal and gas outburst and a method for preventing outburst by utilizing the structure. The structure is arranged behind a safety pillar in a roadway and comprises an inverted filter, an anti-impact layer and a sealed collecting layer in sequence, wherein the inverted filter is closest to the safety pillar; and the sealed collecting layer is provided with a gas collecting and exhausting channel. The structure is simple and convenient to operate, can effectively reduce the pressure gradient of coal bed gas, not only can realize the aim of preventing coal and gas outburst, but also shortens the construction time needed by underground coal uncovering and improves the working efficiency as the early-stage construction of the sealed collecting layer can synchronize with forward roadway excavation and installation of the sand gravel inverted filter needs short time.
Description
Technical field
The present invention relates to the technical field of security and protection of mining industry, particularly relate to a kind of structure that prevents that coal and gas from giving prominence in the stone door punching coal process, and utilize this structure to prevent the method for giving prominence to.
Background technology
Coal and gas are outstanding to be one of main mine disaster.If this disaster accident takes place, will cause a large amount of coals and gas to throw to the tunnel, push over equipment and support, form coal stream and bury the people, make accidents such as the people suffocates.Because gas has explosivity and combustibility, in case meet burning things which may cause a fire disaster, can cause gas explosion and pyrophoricity accident again, jeopardizes the production of whole mine and workman's life security.This disaster is particularly outstanding in China, accounts for more than 1/3 of whole world disaster sum greatly.In all kinds of outstanding accidents, it is the highest that outstanding probability takes place during stone door punching coal, and intensity of outburst is also maximum.The effective measures that are used for the crossdrift protrusion-dispelling at present have advance borehole, loosening blasting, hydraulic flushing in hole, coal-bed flooding etc., more than in the various protrusion-dispelling technical measures, the enforcement time that has is long, what have implements the comparison difficulty.
Summary of the invention
At above the deficiencies in the prior art, the invention provides a kind of simple in structurely, easy and simple to handle, and can effectively reduce the coal-bed gas pressure gradient, be used to prevent the structure that coal and gas are outstanding and utilize this structure to prevent the method that coal and gas are given prominence to.
First scheme of the present invention provides a kind of structure that prevents that coal and gas are outstanding, and this structure is arranged at behind the safe rock pillar in the tunnel in, and described structure comprises successively: loaded filter, anti-impacting layer and seal the collecting layer;
Wherein, the most approaching safe rock pillar of described loaded filter;
Described sealing collecting layer is provided with gas and collects passing away.
Described loaded filter is big by density, the material of strong shock resistance is piled up and formed.
Described loaded filter is made of sand gravel.
Described anti-impacting layer is the fence that the material by strong shock resistance constitutes.
Described anti-impacting layer is made by metal material.
Described sealing collecting layer comprises hermatic door, is provided with envelope wall between door body both sides and tunnel inwall, and a side wall body is provided with the shooting line passage, and the opposite side body of wall is provided with gas and collects passing away.
Described hermatic door is curved arch towards anti-impacting layer.
Alternative plan of the present invention provides and a kind ofly utilizes above structure to prevent the method that coal and gas are outstanding, may further comprise the steps successively:
1) material behind the safe rock pillar in the tunnel that density is big, strong shock resistance is piled into loaded filter, and what coal body took place during in order to the opposing exposed coal is outstanding, utilizes the hole of piling up storeroom simultaneously, realizes the seepage flow of gas:
2) anti-impacting layer that the material of strong shock resistance constitutes is set at loaded filter outer wall place, what coal body and gas took place during in order to dual opposing exposed coal is outstanding.
3) the sealing collecting layer is set behind anti-impacting layer, utilizes the space between anti-impacting layer and the airtight collecting layer to accumulate gas, and collect the passing away pump drainage by gas and collect.
Principle of the present invention is:
The loaded filter control principle of dashing forward, be exposed coal before, the gas pressure in the loaded filter hole equals tunnel gas pressure (being about 1 atmospheric pressure).Utilize explosion to carry out exposed coal, the moment behind the exposed coal, in the coal body in gas pressure and the loaded filter hole difference of gas pressure bigger, if when the gas barometric gradient is greater than the critical barometric gradient of coal body unstability in the coal body, small-sized giving prominence to takes place in coal body.Projection accumulates in the hole of sand gravel loaded filter, because the sand gravel loaded filter has reduced the seepage flow section, has prolonged the seepage flow approach, increased filtrational resistance, the gas pressure in the loaded filter hole is raise rapidly, causes the interior gas barometric gradient of coal body to reduce.When gas pressure gradient during less than the critical gas pressure gradient of coal body unstability, outstanding stopping to be realized coal body " from steady ", reduced intensity of outburst.After this, gas with the form of seepage flow " steadily " along flowing between the hole of sand gravel loaded filter, by the row of conduits that is installed in the sealed door reveal to ground.After gas pressure in the door to be sealed in the tunnel is reduced to the tunnel normal pressure, reduce the closed chamber gas density by the original ventilation system in tunnel, indoor gas density to be sealed reaches safety value when following, and the opening encapsulation door carries out muck and excavates.Because the permeability of loaded filter is far above the coal seam, therefore, it is shorter that gas pressure reduces the required time in the loaded filter.
Beneficial effect of the present invention is:
The present invention is simple in structure, easy and simple to handle, and can effectively reduce the coal-bed gas pressure gradient.And compare as the outburst prevention measures of anti-impacting layer with direct employing wire netting, can further reduce the intensity of outburst of explosion exposed coal.This is to realize the tunnel supercharging because the wire netting protrusion-dispelling is coal cinder or the coal dust that is filled in wire netting the place ahead after taking place to give prominence to by the explosion exposed coal, and the sand gravel loaded filter that is positioned at wire netting the place ahead in the inventive method has played the effect that replaces coal cinder and coal dust in fact, therefore the intensity that can reduce to give prominence to.The present invention is except realizing preventing the outstanding purpose of coal and gas, because the early stage of airtight collecting layer, construction was carried out synchronously with the place ahead tunnelling, it is short that the sand gravel loaded filter is installed required time, thereby shortened the required engineering time of down-hole exposed coal, improved operating efficiency.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1 is the tunnel; 2 is safe rock pillar; 3 is loaded filter; 4 is anti-impacting layer; 5 are the sealing collecting layer; 6 is hermatic door; 7 is envelope wall; 8 is the shooting line passage; 9 are gas collection passing away; 10 is the coal seam.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further details.
The invention provides a kind of structure that prevents that coal and gas from giving prominence to, and utilize this structure to prevent the method for giving prominence to.
As shown in Figure 1, concrete structure of the present invention is as follows:
Structure of the present invention is used to prevent that stone door punching coal process coal and gas are outstanding, so after need being arranged on safe rock pillar 2 in the tunnel 1, mainly by loaded filter 3, anti-impacting layer 4 and seal collecting layer 5 and constitute.Loaded filter 3 the most approaching safe rock pillars 2 wherein, generally by have certain particle diameter, density material big, strong shock resistance is piled up and is formed.The material that adopts among the present invention is a sand gravel, and behind the safe rock pillar of clogging behind the mesh bag suit in the tunnel 12, what coal body took place during in order to the opposing exposed coal is outstanding, utilizes the hole of piling up storeroom simultaneously, realizes the seepage flow of gas.Also leave certain distance between safe rock pillar 2 and the loaded filter 3, with the effect that guarantees that exposed coal is blown out.
And after loaded filter 3, the anti-impacting layer 4 that at interval certain buffer distance is provided with, also be that material by strong shock resistance constitutes, what adopt among the present invention is metal material, what coal body took place when being made generally in barrier shape and being used for secondary opposing exposed coal is outstanding, also utilizes the gap of fence to realize the seepage flow of gas simultaneously.
Outermost is sealing collecting layer 5, comprises hermatic door 6, is provided with envelope wall 7, one side wall bodies between door body 6 both sides and tunnel 1 inwall and is provided with cable passage 8, and the opposite side body of wall is provided with gas and collects passing away 9.Simultaneously, leave certain space between sealing collecting layer 5 and the anti-impacting layer 4, can be used for accumulating effectively the gas that seepage flow comes out, the gas in the space is then by collecting passing away 9 pump drainages to ground.And hermatic door 6 helps the pressure of Free up Memory gas for the door body towards the curved arch design of anti-impacting layer 4, is beneficial to gas air flow direction door body side surface simultaneously, is convenient to the collection of methane gas.
For above structure, the order that is provided with in actual applications is:
1) material behind the safe rock pillar 2 in tunnel 1 that density is big, strong shock resistance is piled into loaded filter 3, and what coal body took place during in order to the opposing exposed coal is outstanding, utilizes the hole of piling up storeroom simultaneously, realizes the seepage flow of gas:
2) anti-impacting layer 4 that constitutes at the material of loaded filter 3 outer wall place strong shock resistances, what coal body and gas took place during in order to secondary opposing exposed coal is outstanding.
3) sealing collecting layer 5 is set behind anti-impacting layer 4, utilizes the space between anti-impacting layer and the airtight collecting layer to accumulate gas, and collect the passing away pump drainage by gas and collect.
The present invention has used the prominent principle of loaded filter control effectively, because before exposed coal, the gas pressure in loaded filter 3 holes equals the gas pressure (being about 1 atmospheric pressure) in the tunnel 1.Utilize explosion to carry out exposed coal, the moment behind exposed coal, in the coal body in gas pressure and loaded filter 3 holes difference of gas pressure bigger, if when the gas barometric gradient is greater than the critical barometric gradient of coal body unstability in the coal body, small-sized giving prominence to takes place in coal body.Projection accumulates in the hole of sand gravel loaded filter 3, because sand gravel loaded filter 3 has reduced the seepage flow section, has prolonged the seepage flow approach, increased filtrational resistance, the gas pressure in the loaded filter hole is raise rapidly, causes the interior gas barometric gradient of coal body to reduce.When gas pressure gradient during less than the critical gas pressure gradient of coal body unstability, outstanding stopping to be realized coal body " from steady ", reduced intensity of outburst.After this, gas, is collected passing away 9 by the gas that is installed in hermatic door 6 reveals and is drained into ground " steadily " along flowing between the hole of sand gravel loaded filter 3 with the form of seepage flow.Treat in the sealed door 6 that the gas pressure in the tunnels 1 and concentration reach safety value when following, open sealed door 6, can continue to construct.Because the permeability of loaded filter 3 is far above coal seam 10, therefore, it is shorter that gas pressure reduces the required time in the loaded filter 3.
The present invention compares with the outburst prevention measures of direct employing wire netting, can further reduce the intensity of outburst of explosion exposed coal. This is to realize the tunnel supercharging because the wire netting protrusion-dispelling is the coal dust that is filled in wire netting the place ahead after taking place to give prominence to by the explosion exposed coal, and the sand gravel loaded filter 3 that is positioned at wire netting the place ahead in the inventive method has played in fact the effect that replaces coal dust, the intensity that therefore, can reduce to give prominence to. The present invention prevents the purpose of coal and Gas Outburst except realizing, because construction in the early stage of airtight collecting layer 5 can be carried out synchronously with tunnel, the place ahead 1 driving, it is short that sand gravel loaded filter 3 is installed required time, thereby shortened the required engineering time of down-hole exposed coal, improved operating efficiency.
Claims (8)
1. structure that prevents that coal and gas are outstanding is arranged at behind the safe rock pillar in the tunnel in, it is characterized in that described structure comprises successively: loaded filter, anti-impacting layer and seal the collecting layer;
Wherein, the most approaching safe rock pillar of described loaded filter;
Described sealing collecting layer is provided with gas and collects passing away.
2. coal and the outstanding structure of gas of preventing according to claim 1 is characterized in that described loaded filter is big by density, the material of strong shock resistance is piled up and formed.
3. coal and the outstanding structure of gas of preventing according to claim 1 and 2 is characterized in that described loaded filter is made of sand gravel.
4. the structure that prevents that coal and gas are outstanding according to claim 1 is characterized in that described anti-impacting layer is the fence that the material by strong shock resistance constitutes.
5. according to claim 1 or the 4 described structures that prevent that coal and gas are outstanding, it is characterized in that described anti-impacting layer made by metal material.
6. coal and the outstanding structure of gas of preventing according to claim 1, it is characterized in that described sealing collecting layer comprises hermatic door, be provided with envelope wall between door body both sides and tunnel inwall, a side wall body is provided with the shooting line passage, and the opposite side body of wall is provided with gas and collects passing away.
7. coal and the outstanding structure of gas of preventing according to claim 6 is characterized in that described hermatic door is curved arch towards anti-impacting layer.
8. utilize the described structure of claim 1 to prevent coal and the outstanding method of gas, may further comprise the steps successively:
1) material behind the safe rock pillar in the tunnel that density is big, strong shock resistance is piled into loaded filter, and what coal body took place during in order to the opposing exposed coal is outstanding, utilizes the hole of piling up storeroom simultaneously, realizes the seepage flow of gas:
2) anti-impacting layer that the material of strong shock resistance constitutes is set at loaded filter outer wall place, what coal body and gas took place during in order to dual opposing exposed coal is outstanding.
3) the sealing collecting layer is set behind anti-impacting layer, utilizes the space between anti-impacting layer and the airtight collecting layer to accumulate gas, and drain into ground by gas collection passing away.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010293731 CN101975076A (en) | 2010-09-21 | 2010-09-21 | Structure for preventing coal and gas outburst and method for preventing outburst |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010293731 CN101975076A (en) | 2010-09-21 | 2010-09-21 | Structure for preventing coal and gas outburst and method for preventing outburst |
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| CN101975076A true CN101975076A (en) | 2011-02-16 |
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| CN 201010293731 Pending CN101975076A (en) | 2010-09-21 | 2010-09-21 | Structure for preventing coal and gas outburst and method for preventing outburst |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529188A (en) * | 2013-10-12 | 2014-01-22 | 安徽理工大学 | Coal and gas outburst permeation instability test device |
| CN117108283A (en) * | 2023-09-06 | 2023-11-24 | 中国矿业大学 | Fluidized coal mining method utilizing self energy storage of coal seam |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2095308A (en) * | 1981-03-24 | 1982-09-29 | Willich F Gmbh & Co | Method and apparatus for consolidating rock strata |
| CN101440715A (en) * | 2008-11-24 | 2009-05-27 | 杜志刚 | Projecting-proof pressure relief method of drivage face |
| CN101598030A (en) * | 2009-07-14 | 2009-12-09 | 中国矿业大学 | Method for realizing fast coal exposing of coal seam rock cross with outburst danger |
| CN101696637A (en) * | 2009-10-09 | 2010-04-21 | 中国矿业大学 | Coal and gas separation bin and method thereof |
-
2010
- 2010-09-21 CN CN 201010293731 patent/CN101975076A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2095308A (en) * | 1981-03-24 | 1982-09-29 | Willich F Gmbh & Co | Method and apparatus for consolidating rock strata |
| CN101440715A (en) * | 2008-11-24 | 2009-05-27 | 杜志刚 | Projecting-proof pressure relief method of drivage face |
| CN101598030A (en) * | 2009-07-14 | 2009-12-09 | 中国矿业大学 | Method for realizing fast coal exposing of coal seam rock cross with outburst danger |
| CN101696637A (en) * | 2009-10-09 | 2010-04-21 | 中国矿业大学 | Coal and gas separation bin and method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529188A (en) * | 2013-10-12 | 2014-01-22 | 安徽理工大学 | Coal and gas outburst permeation instability test device |
| CN103529188B (en) * | 2013-10-12 | 2015-10-07 | 安徽理工大学 | A kind of coal and gas prominent permeation instability test device |
| CN117108283A (en) * | 2023-09-06 | 2023-11-24 | 中国矿业大学 | Fluidized coal mining method utilizing self energy storage of coal seam |
| CN117108283B (en) * | 2023-09-06 | 2024-03-19 | 中国矿业大学 | Fluidized coal mining method utilizing self energy storage of coal seam |
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Application publication date: 20110216 |