CN102011574A - Method for increasing yield of coal bed methane through vibration - Google Patents
Method for increasing yield of coal bed methane through vibration Download PDFInfo
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- CN102011574A CN102011574A CN 201010545665 CN201010545665A CN102011574A CN 102011574 A CN102011574 A CN 102011574A CN 201010545665 CN201010545665 CN 201010545665 CN 201010545665 A CN201010545665 A CN 201010545665A CN 102011574 A CN102011574 A CN 102011574A
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Abstract
The invention discloses a method for increasing the yield of coal bed methane through vibration, which comprises the following steps of: setting one or more hole positions of bedding or crossing vibration holes (2) on a target coal bed or rock stratum (1), drilling at the set hole positions of the vibration holes (2) one by one, putting anti-explosion or intrinsic safety type vibration equipment (3) at the bottoms of the vibration holes (2) by using an installation rod, fixing a fixing device (4) on the top and at the bottom of the vibration equipment (3) respectively, filling a coupling agent into gaps between the vibration equipment (3) and the vibration holes (2), sealing the orifices of the vibration holes (2), performing vibration operation, and extracting the coal bed methane in a vibration influence area according to the conventional method. By the technology, a coal medium is subjected to the action of alternately changed tensile stress and compression stress through the vibration, so that the coal bed or an adjacent rock stratum produces corresponding alternately changed elongation and compression elastic deformation and alternately sparse and dense vibration waves, and the coal bed methane is easily desorbed and diffused and flows from micropores.
Description
Technical field
The present invention relates to a kind of vibration volume increase coal bed gas method of coal bed gas volume increase usefulness.
Background technology
Contain a large amount of coal bed gas in the coal seam, be called gas again, it is not only valuable resource, also is the important component part that coal and gas are given prominence to potential in the underground mining of colliery, and its main component is a methane.China is coal resources big countries, and along with the high speed development and the scale of coal industry increases suddenly, gas emission increases, and this coal mining accident outstanding, that blast causes of invar rises rapidly.Yet coal bed gas is again the fuel of a kind of high-quality, cleaning, if reasonably developed, reclaim and utilize, not only can reduce the generation of coal mining accident, ensures the ordinary production in colliery, can also solve the problem of China's energy scarcity.About 36 tcms of the coal bed gas resource amount of China, this numerical value is suitable with the natural gas resource amount.China successfully realizes technology such as mined bed extraction coal bed gas, adjacent layer extraction coal bed gas, goaf extraction coal bed gas, country rock extraction coal bed gas, and in the protrusion-dispelling of territory, large, medium and small moulded coal mining area, the whole nation, obtained widely using, in coal bed gas extraction, control gas explosion with reduce coal and obtained some effects aspect giving prominence to gas.Since China's ocurrence of coal seam geological conditions complexity, the gas bearing capacity height, and the permeability in coal seam is low, so bigger difficulty aspect the coal bed gas extraction, occurs,, specific condition of compatibility arranged respectively though also adopted some to improve the infiltrative method in coal seam at present, accommodation is little, and effect is not remarkable.
Summary of the invention
The purpose of this invention is to provide a kind of vibration volume increase coal bed gas method, is the action principle according to mechanical oscillation, implements vibration service in the coal seam, thereby reduces the desorption quantity of coal to the adsorbance increase coal bed gas of coal bed gas, improves the coal seam permeability.Purpose of the present invention can realize by following technique measures (step):
(1) the at first physical characteristic and the tectonic characteristics of the contiguous rock stratum of detail knowledge target coal seam or its in case of necessity, cooperate test measures such as geodetic stress;
(2) on the contiguous rock stratum of target coal seam or its, select hardness is high relatively or density is big relatively orientation as along layer or wear the position, hole in layer vibration hole, keep suitable distance between the position, hole;
(3) adopt known tool technique to be holed in the position, hole in the vibration hole arranged one by one, the external diameter in vibration hole should be slightly larger than the external diameter of vibratory equipment, and it is prerequisite that the degree of depth that described vibration hole depth is gone into target coal seam or its contiguous rock stratum is not brought out gas outstanding after with the sealing of hole vibration;
(4) after the vibration hole is accomplished fluently, utilize mounting rod with explosion-proof or intrinsic safety type vibratory equipment insert the vibration hole at the bottom of, each fixes a fastening devices in the top of vibratory equipment and bottom, and fill with couplant in the gap between vibratory equipment and vibration hole, utilize sealing device to seal in the aperture in vibration hole then;
(5) confirm that the sealing of vibration hole is errorless after, implement vibration service, mechanical oscillation effect by the vibratory equipment in the vibration hole, make the coal body medium be subjected to tensile stress and the action of compressive stress that alternately changes, thereby make coal body produce respective quadrature for the elongation and the elasticity of compression deformation that change, produce the vibration wave of density interphase, help coal bed gas from micropore desorb, diffusion and mobile;
(6) in this vibration effect zone, implement the coal bed gas extraction according to conventional method.
Describedly decide on geological conditions along a layer and a drilling mode of wearing layer vibration hole, can be vertically, tiltable, flexible etc.; Distance between the position, hole in vibration hole is arranged and should be decided the sensitiveness of vibration according to target coal seam or its contiguous rock stratum; The vibration service frequency is the best according to the tectonic characteristics of target coal seam or its contiguous rock stratum to reach the high anti-reflection property of coal bed gas.
Beneficial effect of the present invention is as follows:
A kind of vibration volume increase coal bed gas method of the present invention, mechanical oscillation effect by vibration hole internal vibration equipment, make the coal body medium be subjected to tensile stress and the action of compressive stress that alternately changes, thereby make coal body produce respective quadrature for the elongation and the elasticity of compression deformation that change, produce the extensional vibration of density interphase, help coal bed gas from micropore desorb, diffusion and mobile, improved the permeability of coal bed gas.
Description of drawings
Fig. 1 is a kind of schematic diagram that vibrates volume increase coal bed gas method of the present invention;
Be labeled as among the figure: 1: target coal seam or its contiguous rock stratum; 2: the vibration hole; 3: vibratory equipment; 4: fastening devices; 5: sealing device.
The specific embodiment
The present invention is further described below with reference to an embodiment (accompanying drawing):
As shown in Figure 1, a kind of vibration volume increase coal bed gas method of the present invention, concrete implementation step is as follows:
(1) the at first physical characteristic and the tectonic characteristics of the contiguous rock stratum 1 of detail knowledge target coal seam or its in case of necessity, cooperate test measures such as geodetic stress;
(2) on the contiguous rock stratum 1 of target coal seam or its, select hardness is high relatively or density is big relatively orientation as along layer or wear the position, hole in layer vibration hole 2, keep suitable distance between the position, hole;
(3) adopt known tool technique to be holed in the position, hole in the vibration hole 2 arranged one by one, the external diameter in vibration hole 2 should be slightly larger than the external diameter of vibratory equipment 3, and the degree of depth that target coal seam or its contiguous rock stratum 1 are goed deep in described vibration hole 2 is a prerequisite not bring out gas outstanding after vibrating with sealing of hole;
(4) after vibration hole 2 is accomplished fluently, utilize mounting rod with explosion-proof or intrinsic safety type vibratory equipment 3 insert the vibration hole at the bottom of, each fixes a fastening devices 4 in the top of vibratory equipment 3 and bottom, and fill with couplant in the gap between vibratory equipment 3 and vibration hole 2, utilize sealing device 5 to seal in the aperture in vibration hole 2 then;
(5) confirm that 2 sealings of vibration hole are errorless after, implement vibration service, mechanical oscillation effect by the vibratory equipment 3 in the vibration hole 2, make the coal body medium be subjected to tensile stress and the action of compressive stress that alternately changes, thereby make coal body produce respective quadrature for the elongation and the elasticity of compression deformation that change, produce the vibration wave of density interphase, help coal bed gas from micropore desorb, diffusion and mobile, described vibration service frequency is the best according to the tectonic characteristics of target coal seam or its contiguous rock stratum 1 to reach the high anti-reflection property of coal bed gas;
(6) in this vibration effect zone, implement the coal bed gas extraction according to conventional method.
Should be noted that and describedly decide on geological conditions along a layer and a drilling mode of wearing layer vibration hole 2, can be vertically, tiltable, flexible etc.; Distance between the position, hole in vibration hole 2 is arranged and should be decided according to the sensitiveness of target coal seam or its contiguous 1 pair of vibration in rock stratum.
A kind of vibration volume increase coal bed gas method of the present invention, mechanical oscillation effect by vibration hole 2 internal vibration equipment, make the coal body medium be subjected to tensile stress and the action of compressive stress that alternately changes, thereby make coal body produce respective quadrature for the elongation and the elasticity of compression deformation that change, produce the extensional vibration of density interphase, help coal bed gas from micropore desorb, diffusion and mobile, improved the permeability of coal bed gas.
Claims (2)
1. a vibration volume increase coal bed gas method comprises following step, it is characterized in that:
Step 1, at first the physical characteristic and the tectonic characteristics of detail knowledge target coal seam or its contiguous rock stratum (1) in case of necessity, cooperate test measures such as geodetic stress;
Step 2 goes up the position, hole of selecting the suitable layer of orientation conduct that hardness is high relatively or density is big relatively or wearing layer vibration hole (2), the suitable distance of maintenance between the position, hole in target coal seam or its contiguous rock stratum (1);
Step 3, adopt known tool technique to be holed in the position, hole in the vibration hole (2) arranged one by one, the external diameter in vibration hole (2) should be slightly larger than the external diameter of vibratory equipment (3), and it is prerequisite that the degree of depth that target coal seam or its contiguous rock stratum (1) are goed deep in described vibration hole (2) is not brought out gas outstanding after with the sealing of hole vibration;
Step 4, after vibration hole (2) is accomplished fluently, utilize mounting rod with explosion-proof or intrinsic safety type vibratory equipment (3) insert the vibration hole at the bottom of, each fixes a fastening devices (4) in the top of vibratory equipment (3) and bottom, and fill with couplant in the gap between vibratory equipment (3) and vibration hole (2), utilize sealing device (5) to seal in the aperture in vibration hole (2) then;
Step 5 after affirmation vibration hole (2) sealing is errorless, is implemented vibration service, and the frequency of described vibration service is the best according to the tectonic characteristics of target coal seam or its contiguous rock stratum (1) to reach the anti-reflection property of coal bed gas height;
Step 6 is implemented the coal bed gas extraction according to conventional method in this vibration effect zone.
2. a kind of vibration volume increase coal bed gas method as claimed in claim 1, it is characterized in that: the distance between the position, hole in vibration hole (2) should be decided the sensitiveness of vibration according to target coal seam or its contiguous rock stratum (1).
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| CN 201010545665 CN102011574B (en) | 2010-11-16 | 2010-11-16 | Method for increasing yield of coal bed methane through vibration |
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| CN 201010545665 CN102011574B (en) | 2010-11-16 | 2010-11-16 | Method for increasing yield of coal bed methane through vibration |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476822A (en) * | 2017-10-12 | 2017-12-15 | 中国矿业大学 | Coal Seam Outburst Hazard measuring while drilling method and device |
| CN110005357A (en) * | 2019-04-12 | 2019-07-12 | 西安科技大学 | A kind of the vibration permeability improvement device and its anti-reflection anti-card hole method of vibration of anti-card hole |
| CN112012697A (en) * | 2020-08-04 | 2020-12-01 | 太原理工大学 | Novel coal seam centrifugal vibration yield increasing system |
| CN113153294A (en) * | 2021-06-02 | 2021-07-23 | 江苏徐矿能源股份有限公司张双楼煤矿 | Pre-splitting anti-impact method for lithologic change area of top plate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476822A (en) * | 2017-10-12 | 2017-12-15 | 中国矿业大学 | Coal Seam Outburst Hazard measuring while drilling method and device |
| CN110005357A (en) * | 2019-04-12 | 2019-07-12 | 西安科技大学 | A kind of the vibration permeability improvement device and its anti-reflection anti-card hole method of vibration of anti-card hole |
| CN110005357B (en) * | 2019-04-12 | 2021-05-18 | 西安科技大学 | Vibration anti-sticking hole anti-reflection device and vibration anti-sticking hole anti-reflection method thereof |
| CN112012697A (en) * | 2020-08-04 | 2020-12-01 | 太原理工大学 | Novel coal seam centrifugal vibration yield increasing system |
| CN112012697B (en) * | 2020-08-04 | 2022-04-19 | 太原理工大学 | Novel coal seam centrifugal vibration yield increasing system |
| CN113153294A (en) * | 2021-06-02 | 2021-07-23 | 江苏徐矿能源股份有限公司张双楼煤矿 | Pre-splitting anti-impact method for lithologic change area of top plate |
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| CN102011574B (en) | 2013-10-30 |
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