CN103061797A - 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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- CN103061797A CN103061797A CN2012105660600A CN201210566060A CN103061797A CN 103061797 A CN103061797 A CN 103061797A CN 2012105660600 A CN2012105660600 A CN 2012105660600A CN 201210566060 A CN201210566060 A CN 201210566060A CN 103061797 A CN103061797 A CN 103061797A
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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 equipment thereof that improves gas discharge in mine efficient, 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 country and each bargh all pay much attention to the problem of gas, take out afterwards first adopt, monitoring, be the canon of Mine Safety in Production with the wind fixed output quota, license is violated anything but.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 the sort of mode, the pump drainage efficient of gas is a very crucial problem, and in order to promote the pump drainage efficient of gas, existing general way is that the technology such as loosening blasting and coal-bed flooding of holing improve drainage efficient etc.The hosting relation of gas in the coal seam comprises free state and adsorbed state.Free state refers to that the gas Original-filling is in the hole or crack of coal; Adsorbed state refers to that gas condenses upon the coal solid matter surface with the monomolecular film form.Under certain gas pressure and temperature condition, free gas and adsorption gas are in dynamic equilibrium state.Usually when pressure was lower than 10 MPa, adsorption gas accounted for 80%～90%, and free gas accounts for 10%～20%.Simultaneously, the adsorption gas amount in the coal increases with the rising of pressure; When pressure decreased, gas transforms to free state from adsorbed state, and also being 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.Under uniform pressure, matchmaker's adsorption gas amount reduces with the rising of coal temperature.Because along with the rising of temperature, the gas molecule will obtain larger kinetic energy, rest on the coal micropore surface the time ask shortening, the gas adsorption amount decreases.1 ℃ of the every rising of temperature, 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 in essence is that the hole in coal seam or crack are increased, and also is that adsorption area increases thereby make the contact area of coal seam and gas, thus lifting ratio of adsorption and reduce the gas amount of free state.Thereby reduction gas pressure; The mode of coal-bed flooding mainly is to reduce the coal seam temperature in essence, and the gas molecular kinetic energy is reduced, thereby reduces the gas amount of free state.Taked the first two to plant technical measures, to have reduced the gas pressure in the colliery in essence temporarily, in case 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 simultaneously, the cycle is long, affects mine production efficiency.Also there is in recent years the scholar to propose the coal seam is applied high-frequency alternating magnetic field, be used for changing the adsorbed state of gas on the coal seam by high-frequency alternating magnetic field, thereby be pumped so that have more gas to be in free state during extraction, to improve the pump drainage efficient of gas, but this method only rests on the aspect of academic research, occur there are no good concrete enforceable technical scheme, obviously prior art has further improved necessity.
Summary of the invention
The object of the present invention is to provide a kind of method and equipment thereof that improves gas discharge in mine efficient, the problem that exists to overcome prior art.
A kind of method that improves gas discharge in mine efficient of the present invention, comprise to coal seam drilling and dig the drawing-off gas hole and apply high-frequency alternating magnetic field by the high-frequency alternating magnetic field generator to the coal seam, it is characterized in that the high-frequency alternating magnetic field generator is being made tubulose, and be completely enclosed within the electrically insulated structures pipe, the high-frequency alternating magnetic field generator of tubulose is seated in the described drawing-off gas hole.
As preferably, the described drawing-off gas hole of digging to coal seam drilling has several, and several high-frequency alternating magnetic field generator spaces are staggered to be inserted in the drawing-off gas hole.
As further preferred, described high-frequency alternating magnetic field generator adopts the safe voltage power supply, and the alternative frequency of the alternating magnetic field that described high-frequency alternating magnetic field generator produces is 0.5～8MHz.Power supply system is suitable under supply voltage and the coal mine like this higher safety simultaneously.And the alternative frequency of alternating magnetic field is limited in 0.5～8MHz scope, and preferably action effect is arranged.
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 of described frequency modulation control unit controls high frequency electric source output, 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 all are encapsulated in the 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 with gasresolution, coal-bed gas is through the high-frequency alternating magnetic field effect, to promote the gas amount of free state and reduce gas and be finalized morning in theory research at the ratio of adsorption on the coal seam, thereby this is by electromagnetic field modification to be carried out in the coal seam to reach the purpose theoretical foundation that improves gas drainage efficiency, is the main problem that exists how alternating magnetic field acts on the coal seam on engineering? obviously needing to set about large-scale equipment from the scope of operation, input cost is high, and alternating magnetic field also is difficult to act on the deep layer coal seam, thereby be difficult to reach preferably effect, the installation and removal of on-the-spot cooperation and equipment will greatly affect normal production in addition, cause the production cycle to elongate.Use equipment of the present invention, adopt gas drainage method of the present invention, the one, the small and exquisite cost of equipment is low, of paramount importance is to install simply, as long as the gas pressure of the scope of operation reaches standard value and just can normally produce, the high-frequency alternating magnetic field generator adopts the safe voltage power supply, coincide with colliery scene electric power system voltage on the one hand, what is more important will prevent effectively that the damaged short circuit of power supply circuits from forming spark ignition gas, it is a kind of measure that improves safety, national standard " safe voltage " regulation safety of China voltage rating comprises 42V, 36V, 24V, 12V etc., according to front described, obvious purpose of the present invention is achieved.
Description of drawings
Accompanying drawing 1 is a kind of high-frequency alternating magnetic field generator architecture schematic diagram that preferred embodiment of the present invention provides;
Accompanying drawing 2 is that a kind of high-frequency alternating magnetic field generator that preferred embodiment of the present invention provides uses state diagram.
Among each figure:
1 is the high-frequency alternating magnetic field generator;
101 is the electrically insulated structures pipe;
102 is electromagnetic coil;
103 is high frequency electric source;
104 is the high frequency electric source output line;
105 is the external power source drop wire;
106 is upper cover;
107 is low head;
108 is the frequency modulation control unit;
109 is suspension ring;
2 is the drawing-off gas hole;
3 is the coal seam;
The specific embodiment
Below with reference to preferred embodiment of the present invention and accompanying drawing thereof a kind of method and a kind of high-frequency alternating magnetic field generator of the present invention that improves gas discharge in mine efficient of the present invention is described further.
A kind of method that improves gas discharge in mine efficient that preferred embodiment of the present invention provides, comprise that to the coal seam 3 bore and dig drawing-off gas hole 2 and apply high-frequency alternating magnetic field by high-frequency alternating magnetic field generator 1 to the coal seam, it is characterized in that high-frequency alternating magnetic field generator 1 is being made tubulose, and be completely enclosed within the electrically insulated structures pipe 101, in this preferred embodiment, described high-frequency alternating magnetic field generator 1 adopts safe DC-voltage supply, China's standard code is safe voltage below 36 volts, high-frequency alternating magnetic field generator 1 with tubulose is seated in the described drawing-off gas hole 2 simultaneously, and 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 that 3 brills dig to the coal seam has several, and several high-frequency alternating magnetic field generator 1 spaces are staggered to be inserted in the drawing-off gas hole 2.The mode at interlaced interval can have multiple, can take such as shown in Figure 2 levels that the mode of a high-frequency alternating magnetic field generator 1 is set every one drawing-off gas hole 2, interlaced every interval, also can take other interval mode, such as every next but two drawing-off gas hole 2 a high-frequency alternating magnetic field generator 1 etc. is set, does 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, the supply frequency of described frequency modulation control unit 108 control high frequency electric sources, 103 outputs, 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 all are encapsulated in the electrically insulated structures pipe 101.The 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, make things convenient for like this suspension of suspension strop, the high-frequency alternating magnetic field generator 1 of being convenient to penetrate in drawing-off gas hole 2 is pulled out, in this preferred embodiment, the supply frequency of high frequency electric source 103 output is in 0.5～8MHz scope and can adjust at work.
In sum, a kind of method that improves gas discharge in mine efficient of the present invention, comprise from digging the drawing-off gas hole to coal seam drilling and applying high-frequency alternating magnetic field by the high-frequency alternating magnetic field generator to the coal seam, it is characterized in that the high-frequency alternating magnetic field generator is being made tubulose, and be completely enclosed within the electrically insulated structures pipe, described high-frequency alternating magnetic field generator adopts the safe voltage power supply, the high-frequency alternating magnetic field generator of tubulose is seated in the described drawing-off gas hole, a kind of high-frequency alternating magnetic field generator of the present invention, by the high frequency electric source that is encapsulated in the electrically insulated structures pipe, frequency modulation control unit and electromagnetic coil consist of, and the present invention has promoted the efficient of gas exhaust.
The above only is the specific embodiment of the present invention.But protection domain of the present invention is not limited to this.Anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention, and therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (5)
1. method that improves gas discharge in mine efficient, comprise to coal seam drilling and dig the drawing-off gas hole and apply high-frequency alternating magnetic field by the high-frequency alternating magnetic field generator to the coal seam, it is characterized in that the high-frequency alternating magnetic field generator is being made tubulose, and be completely enclosed within the electrically insulated structures pipe, the high-frequency alternating magnetic field generator of tubulose is seated in the described drawing-off gas hole.
2. a kind of method that improves gas discharge in mine efficient according to claim 1 is characterized in that describedly digging the drawing-off gas hole to coal seam drilling several being arranged, and several high-frequency alternating magnetic field generator spaces are staggered to be inserted in the drawing-off gas hole.
3. a kind of method that improves gas discharge in mine efficient according to claim 2, it is characterized in that described high-frequency alternating magnetic field generator adopts the safe voltage power supply, the alternative frequency of the alternating magnetic field that described high-frequency alternating magnetic field generator produces is 0.5～8MHz.
4. high-frequency alternating magnetic field generator, comprise high frequency electric source, frequency modulation control unit and electromagnetic coil, the supply frequency of described frequency modulation control unit controls high frequency electric source output, 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 all are encapsulated in the electrically insulated structures pipe.
5. a kind of high-frequency alternating magnetic field generator according to claim 3 is characterized in that its input voltage is safe voltage.
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 true CN103061797A (en) | 2013-04-24 |
| CN103061797B 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352682A (en) * | 2013-07-24 | 2013-10-16 | 中国矿业大学(北京) | Method for improving gas extraction rate in coal seams with pulse electromagnetic waves |
| CN108757008A (en) * | 2018-05-14 | 2018-11-06 | 华北科技学院 | A method of improving this coal bed gas drainage efficiency using magnetic fluid |
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| CN2141591Y (en) * | 1992-11-12 | 1993-09-01 | 赵培生 | High-change 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1583636A1 (en) * | 1987-12-15 | 1990-08-07 | Институт Горного Дела Ан Казсср | Coal bed degassing method |
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2012
- 2012-12-24 CN CN201210566060.0A patent/CN103061797B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2141591Y (en) * | 1992-11-12 | 1993-09-01 | 赵培生 | High-change 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352682A (en) * | 2013-07-24 | 2013-10-16 | 中国矿业大学(北京) | Method for improving gas extraction rate in coal seams with pulse electromagnetic waves |
| 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 |
| CN108757008A (en) * | 2018-05-14 | 2018-11-06 | 华北科技学院 | A method of improving this coal bed gas drainage efficiency using magnetic fluid |
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| CN103061797B (en) | 2015-04-08 |
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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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