CN103061797B - Method and device for increasing the coal mine gas drainage efficiency - Google Patents
Method and device for increasing the coal mine gas drainage efficiency Download PDFInfo
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- CN103061797B CN103061797B CN201210566060.0A CN201210566060A CN103061797B CN 103061797 B CN103061797 B CN 103061797B CN 201210566060 A CN201210566060 A CN 201210566060A CN 103061797 B CN103061797 B CN 103061797B
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Abstract
A method for increasing the coal mine gas drainage efficiency includes: drilling a gas drainage hole on coal seams and applying high frequency alternating magnetic field to the coal seams through a high frequency alternating magnetic field generator. The method is characterized in that the high frequency alternating magnetic field generator is manufactured in a shape of pipe and is sealed completely in a pipe which is provided with a electricity insulation structure, safe voltage power supply is used by the high frequency alternating magnetic field generator and the pipe-shaped high frequency alternating magnetic field generator is placed in the gas drainage hole and the high frequency alternating magnetic field generator comprises a high frequency power supply, a frequency modulation control unit and an electromagnetic coil in the pipe, which are provided with an electricity insulation structure. According to the method, the problem of gas drainage in the prior art is solved.
Description
Technical field
The present invention relates to a kind of method and the equipment thereof that improve gas discharge in mine efficiency, it belongs to coal mine gas pump drainage method and apparatus class.
Background technology
Gas is the No.1 problem of Mine Safety in Production, particularly Safety of Coal Mine Production always, and the problem of national and each bargh to gas is all paid much attention to, first take out adopt afterwards, monitoring, be the canon of Mine Safety in Production with wind fixed output quota, absolutely not permit to violate.In the prior art, the pump drainage of gas generally includes several modes such as ground face goaf extraction, position roof drainage, tunnel extraction, goaf fissure zone extraction, the extraction of upper corner pipe laying, surface drilling extraction, horizontal long borehole, large diameter borehole extraction.No matter be that mode, the pump drainage efficiency of gas is a very crucial problem, and in order to promote the pump drainage efficiency of gas, existing general way carries out the technology such as boring loosening blasting and coal-bed flooding to improve drainage efficient etc.The hosting relation of gas in coal seam comprises free state and adsorbed state.Free state refers to that gas Original-filling is in the hole or crack of coal; Adsorbed state refers to that gas condenses upon coal solid matter surface with monomolecular film form.Under certain gas pressure and temperature condition, free gas and adsorption gas are in dynamic equilibrium state.Usually, when pressure is lower than 10 MPa, adsorption gas accounts for 80% ~ 90%, and free gas accounts for 10% ~ 20%.Meanwhile, the adsorption gas amount in coal increases with the rising of pressure; When pressure decreases, gas transforms from adsorbed state to free state, and also namely gas is evaporated from the micropore surface of coal, is called desorption of mash gas.Gas adsorption is exothermic process, and desorption of mash gas is endothermic process.At the same pressure, the adsorption gas amount of matchmaker reduces with the rising of coal temperature.Because along with the rising of temperature, gas molecule will obtain larger kinetic energy, rest on coal micropore surface time ask shortening, gas adsorption amount decreases.Temperature often raises 1 DEG C, and the gas adsorption amount of pure coal per ton reduces by 0.1 ~ 0.3m3.Main manifestations is seepage flow and absorption, and boring loosening blasting effect is in essence that the hole in coal seam or crack are increased, thus make the contact area of coal seam and gas also namely adsorption area increase, thus lifting ratio of adsorption and reduce the gas amount of free state.Thus reduction gas pressure; The mode of coal-bed flooding mainly reduces coal seam temperature in essence, and gas molecular kinetic energy is reduced, thus reduces the gas amount of free state.Take the first two and plant technical measures, the gas pressure temporarily reduced in colliery in essence, once relevant condition achievement, gas pressure will return to previous level, the technical measures of obvious aforesaid boring loosening blasting and coal-bed flooding can not tackle the problem at its root, waste time and energy, the cycle is long simultaneously, affects mining production efficiency.Also scholar is had to propose to apply high-frequency alternating magnetic field to coal seam in recent years, by high-frequency alternating magnetic field be used for change the adsorbed state of gas on coal seam, make during extraction, have more gas be in free state thus be pumped, to improve the pump drainage efficiency of gas, but this method only rests in the aspect of academic research, occur there are no good concrete enforceable technical scheme, obvious prior art has the necessity improved further.
Summary of the invention
The object of the present invention is to provide a kind of method and the equipment thereof that improve gas discharge in mine efficiency, to overcome prior art Problems existing.
A kind of method improving gas discharge in mine efficiency of the present invention, comprise and dig drawing-off gas hole to coal seam drilling and apply high-frequency alternating magnetic field by high-frequency alternating magnetic field generator to coal seam, high-frequency alternating magnetic field generator is it is characterized in that to make tubulose, and be completely enclosed within electrically insulated structures pipe, the high-frequency alternating magnetic field generator of tubulose is seated in described drawing-off gas hole.
As preferably, the described drawing-off gas hole dug to coal seam drilling has several, and several high-frequency alternating magnetic field generators are spaced to be staggeredly inserted in drawing-off gas hole.
As preferred further, described high-frequency alternating magnetic field generator adopts safe voltage to power, and the alternative frequency of the alternating magnetic field that described high-frequency alternating magnetic field generator produces is 0.5 ~ 8MHz.Such supply voltage and underground coal mine power supply system is suitable higher safety simultaneously.And the alternative frequency of alternating magnetic field is limited within the scope of 0.5 ~ 8MHz, there is good action effect.
A kind of high-frequency alternating magnetic field generator of the present invention, comprise high frequency electric source, frequency modulation control unit and electromagnetic coil, the supply frequency that described frequency modulation control unit controls high frequency electric source exports, the output of described high frequency electric source is connected to electromagnetic coil, and described high frequency electric source, frequency modulation control unit and electromagnetic coil are all encapsulated in electrically insulated structures pipe.
As preferably, the input voltage of high-frequency alternating magnetic field generator of the present invention is safe voltage.
The amplitude versus frequency characte of electromagnetic field is relevant to gasresolution, coal-bed gas is through high-frequency alternating magnetic field effect, the gas amount of free state will be promoted and reduce the ratio of adsorption of gas on coal seam in theoretical research and be early finalized, this carries out modification by electromagnetic field to coal seam thus reaches the object theoretical foundation improving gas drainage efficiency, does is main Problems existing how alternating magnetic field acts on coal seam in engineering? obviously set about needing large-scale equipment from the scope of operation, input cost is high, and alternating magnetic field is also difficult to act on deep layer coal seam, thus be difficult to reach good effect, extreme influence is produced by the installation and removal of on-the-spot cooperation and equipment normally in addition, the production cycle is caused to elongate.Use equipment of the present invention, adopt gas drainage method of the present invention, one is that the small and exquisite cost of equipment is low, most importantly install simple, just can normally produce as long as the gas pressure of the scope of operation reaches standard value, high-frequency alternating magnetic field generator adopts safe voltage to power, coincide with colliery scene electric power system voltage on the one hand, what is more important forms spark ignition gas by effectively preventing the damaged short circuit of power supply circuits, it is a kind of measure improving safety, national standard " safe voltage " regulation safety of China voltage rating comprises 42V, 36V, 24V, 12V etc., described in front, obvious object of the present invention is achieved.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of high-frequency alternating magnetic field generator architecture schematic diagram that present pre-ferred embodiments provides;
Accompanying drawing 2 is a kind of high-frequency alternating magnetic field generator using state figure that present pre-ferred embodiments provides.
In each figure:
1 is high-frequency alternating magnetic field generator;
101 is electrically insulated structures pipe;
102 is electromagnetic coil;
103 is high frequency electric source;
104 is high frequency electric source output line;
105 is external power source drop wire;
106 is upper cover;
107 is low head;
108 is frequency modulation control unit;
109 is suspension ring;
2 is drawing-off gas hole;
3 is coal seam;
Detailed description of the invention
Below with reference to present pre-ferred embodiments and accompanying drawing thereof to of the present invention a kind of improve gas discharge in mine efficiency method and a kind of high-frequency alternating magnetic field generator of the present invention be described further.
A kind of method improving gas discharge in mine efficiency that preferred embodiment of the present invention provides, comprise to coal seam 3 bore dig drawing-off gas hole 2 and by high-frequency alternating magnetic field generator 1 to coal seam apply high-frequency alternating magnetic field, high-frequency alternating magnetic field generator 1 is it is characterized in that to make tubulose, and be completely enclosed within electrically insulated structures pipe 101, in this preferred embodiment, described high-frequency alternating magnetic field generator 1 adopts safe dc voltage to power, China's standard specifies that less than 36 volts for safe voltage, the high-frequency alternating magnetic field generator 1 of tubulose is seated in described drawing-off gas hole 2 simultaneously, the alternative frequency of the alternating magnetic field that described high-frequency alternating magnetic field generator 1 produces is that 0.5 ~ 8MHz is adjustable in this preferred embodiment.
In this preferred embodiment, the described drawing-off gas hole 2 dug of boring to coal seam 3 has several, and several high-frequency alternating magnetic field generators 1 spaced interlocking is inserted in drawing-off gas hole 2.The mode at interlaced interval can have multiple, levels such as shown in Figure 2 can be taked every an interlaced mode arranging a high-frequency alternating magnetic field generator 1 at interval of a drawing-off gas hole 2, also other interval mode can be taked, as every next but two drawing-off gas hole 2 arranges a high-frequency alternating magnetic field generator 1 etc., do not state one by one at this.
A kind of high-frequency alternating magnetic field generator that preferred embodiment of the present invention provides, comprise high frequency electric source 103, frequency modulation control unit 108 and electromagnetic coil 102, described frequency modulation control unit 108 controls the supply frequency that high frequency electric source 103 exports, the output of described high frequency electric source 103 is connected to electromagnetic coil 102, and described high frequency electric source 103, frequency modulation control unit 108 and electromagnetic coil 102 are all encapsulated in electrically insulated structures pipe 101.Upper end is by upper cover 106 shutoff, and in this preferred embodiment, the input voltage of described high-frequency alternating magnetic field generator 1 is safe dc voltage.In this preferred embodiment, the termination of described electrically insulated structures pipe 101 is connected with suspension ring 109, facilitate the suspension of suspension strop like this, the high-frequency alternating magnetic field generator 1 penetrated in drawing-off gas hole 2 is convenient to pull out, in this preferred embodiment, the supply frequency that high frequency electric source 103 exports can to adjust at work within the scope of 0.5 ~ 8MHz.
In sum, a kind of method improving gas discharge in mine efficiency of the present invention, comprise from digging drawing-off gas hole to coal seam drilling and applying high-frequency alternating magnetic field by high-frequency alternating magnetic field generator to coal seam, high-frequency alternating magnetic field generator is it is characterized in that to make tubulose, and be completely enclosed within electrically insulated structures pipe, described high-frequency alternating magnetic field generator adopts safe voltage to power, the high-frequency alternating magnetic field generator of tubulose is seated in described drawing-off gas hole, a kind of high-frequency alternating magnetic field generator of the present invention, by the high frequency electric source be encapsulated in electrically insulated structures pipe, frequency modulation control unit and electromagnetic coil are formed, the present invention improves the efficiency of gas exhaust.
The above, be only the specific embodiment of the present invention.But scope is not limited thereto.Anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention, therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (3)
1. one kind is improved the method for gas discharge in mine efficiency, comprise and dig drawing-off gas hole to coal seam drilling and apply high-frequency alternating magnetic field by high-frequency alternating magnetic field generator to coal seam, high-frequency alternating magnetic field generator is it is characterized in that to make tubulose, and be completely enclosed within electrically insulated structures pipe, the high-frequency alternating magnetic field generator of tubulose is seated in described drawing-off gas hole.
2. a kind of method improving gas discharge in mine efficiency according to claim 1, is characterized in that describedly digging drawing-off gas hole to coal seam drilling and having several, and several high-frequency alternating magnetic field generators are spaced to be staggeredly inserted in drawing-off gas hole.
3. a kind of method improving gas discharge in mine efficiency according to claim 2, it is characterized in that described high-frequency alternating magnetic field generator adopts safe voltage to power, the alternative frequency of the alternating magnetic field that described high-frequency alternating magnetic field generator produces is 0.5 ~ 8MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210566060.0A CN103061797B (en) | 2012-12-24 | 2012-12-24 | Method and device for increasing the coal mine gas drainage efficiency |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210566060.0A CN103061797B (en) | 2012-12-24 | 2012-12-24 | Method and device for increasing the coal mine gas drainage efficiency |
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| CN103061797A CN103061797A (en) | 2013-04-24 |
| CN103061797B true CN103061797B (en) | 2015-04-08 |
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| CN201210566060.0A Expired - Fee Related CN103061797B (en) | 2012-12-24 | 2012-12-24 | Method and device for increasing the coal mine gas drainage efficiency |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352682B (en) * | 2013-07-24 | 2016-08-24 | 中国矿业大学(北京) | Pulse electromagnetic improves the method for coal bed gas extraction rate |
| CN108757008B (en) * | 2018-05-14 | 2019-11-26 | 华北科技学院 | A method of this coal bed gas drainage efficiency is improved using magnetic fluid |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1583636A1 (en) * | 1987-12-15 | 1990-08-07 | Институт Горного Дела Ан Казсср | Coal bed degassing method |
| CN2141591Y (en) * | 1992-11-12 | 1993-09-01 | 赵培生 | Alternating Magnetic Field Generator |
| US6969123B2 (en) * | 2001-10-24 | 2005-11-29 | Shell Oil Company | Upgrading and mining of coal |
| CN101183593A (en) * | 2007-10-16 | 2008-05-21 | 中山大学 | Alternating intense magnetic field instrument |
| CN202348323U (en) * | 2011-11-30 | 2012-07-25 | 山西晋城无烟煤矿业集团有限责任公司 | Coal mine gas drainage drill combination hole-main pipe hole linkage structure |
| CN102817632A (en) * | 2012-08-20 | 2012-12-12 | 山西煤炭运销集团科学技术研究有限公司 | Method for draining gas of mining layer of mine |
| CN102817631A (en) * | 2012-08-20 | 2012-12-12 | 山西煤炭运销集团科学技术研究有限公司 | Method for draining gas of upper adjacent layer of mine |
-
2012
- 2012-12-24 CN CN201210566060.0A patent/CN103061797B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1583636A1 (en) * | 1987-12-15 | 1990-08-07 | Институт Горного Дела Ан Казсср | Coal bed degassing method |
| CN2141591Y (en) * | 1992-11-12 | 1993-09-01 | 赵培生 | Alternating Magnetic Field Generator |
| US6969123B2 (en) * | 2001-10-24 | 2005-11-29 | Shell Oil Company | Upgrading and mining of coal |
| CN101183593A (en) * | 2007-10-16 | 2008-05-21 | 中山大学 | Alternating intense magnetic field instrument |
| CN202348323U (en) * | 2011-11-30 | 2012-07-25 | 山西晋城无烟煤矿业集团有限责任公司 | Coal mine gas drainage drill combination hole-main pipe hole linkage structure |
| CN102817632A (en) * | 2012-08-20 | 2012-12-12 | 山西煤炭运销集团科学技术研究有限公司 | Method for draining gas of mining layer of mine |
| CN102817631A (en) * | 2012-08-20 | 2012-12-12 | 山西煤炭运销集团科学技术研究有限公司 | Method for draining gas of upper adjacent layer of mine |
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Owner name: SHENZHEN HUANQIU BOYANG ELECTROMECHANICAL TECHNOLO Free format text: FORMER OWNER: SUN LIMIN Effective date: 20140107 |
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Effective date of registration: 20140107 Address after: The new community Xingfa 518000 Shenzhen Road, Guangdong province Baoan District Guanlan Street Jun factory 2, third floor A Southeast Applicant after: Shenzhen City Universal Boyang Mechanical and Electrical Science & Technology Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Nanshan District Xili Pearl Road Pearl Garden Ming Yu Ge 1D Applicant before: Sun Limin |
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Granted publication date: 20150408 Termination date: 20161224 |