CN103061766A - Method for preventing and controlling coalbed rockburst through chemical reaction - Google Patents
Method for preventing and controlling coalbed rockburst through chemical reaction Download PDFInfo
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- CN103061766A CN103061766A CN2013100103164A CN201310010316A CN103061766A CN 103061766 A CN103061766 A CN 103061766A CN 2013100103164 A CN2013100103164 A CN 2013100103164A CN 201310010316 A CN201310010316 A CN 201310010316A CN 103061766 A CN103061766 A CN 103061766A
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Abstract
The invention discloses a method for preventing and controlling coalbed rockburst through chemical reaction, which sequentially comprises the following steps: selecting a coalbed with rockburst disasters and a vitrinite reflectance of less than 0.6%; selecting a certain area in the coalbed to carry out hole drilling; blocking orifices of drilled holes; preparing an alkali solution; pumping the prepared alkali solution into the drilled holes to soak for a period of time; and monitoring in a slight shock, electromagnetic radiation or cuttings drilling mode so as to ensure that the outburst-proneness is eliminated, repeatedly carrying out soaking many times until the outburst-proneness is completely eliminated. Compared with the traditional physical rockburst prevention and control measures, and the traditional rockburst prevention and control measures, the method disclosed by the invention is not only good in rockburst prevention and control effect, but also convenient to construct, high in safety and low in cost, eliminates the outburst-proneness rapidly and thoroughly, avoids the defect that the traditional water injection and absorption speeds are slow, provides a new prevention and control method for low-rank coalbed rockburst, and has a broad application prospect in low-rank coalbeds.
Description
Technical field
The invention belongs to the Safety of Coal Mine Production technical field, be specifically related to a kind of method of chemical reaction control Bumping Pressure in Coal Layers.
Background technology
Increase along with mining depth, because the acting in conjunction of geostatic stress, mining induced stress and tectonic stress, most of mines are subject to the threat of bump to some extent, Burst Tendency, production technique condition and the geologic(al) factor in while coal seam itself, manifesting of bump can be day by day serious, and pressure bump behavior is more and more frequent.Impact strength and destructiveness are increasing, and particularly mining depth reaches earth's surface 500 m and occurs when following particularly frequent and strong.
Bump serious threat Safety of Coal Mine Production can cause digging space gross distortion destruction, personnel death and device damage, displacement etc.; Gas-bearing Coal Seams can cause that also coal seam or goaf gas pour out when occuring to impact, and meets fire and easily causes gas explosion.Present China great majority are adopted dark larger colliery and the dynamic phenomenons such as bump occurred.
The method of administering at present bump mainly contains exploitation topping, coal-bed flooding, destressing borehole, roof break and release explosion etc., and key is to reduce elastic energy and the stress transfer peak value in coal seam, realizes weakening or shifting bump.The exploitation topping is difficult to carry out at single coal bed.At getting working face and tunnel control bump, coal-bed flooding and release explosion are comparatively commonly used, and the former limitation main manifestations is that the speed of absorption water in coal seam is slower, and the coal body elastic energy reduces insufficient; The latter easily brings out bump and coal and Gas Outburst, during the miso-fire handling and dangerous.
Summary of the invention
The present invention is for solving along with the colliery depth of excavation increases, rock blast hazard becomes increasingly conspicuous, physics mode is eliminated the limitation that bump exists at present, provide a kind of aqueous slkali and low-order coal generation chemical reaction of utilizing to reduce coal mechanics intensity and elastic energy, eliminate the method for the chemical reaction control Bumping Pressure in Coal Layers of Bumping Pressure in Coal Layers.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the method for chemical reaction control Bumping Pressure in Coal Layers may further comprise the steps successively:
(1), selects to exist the coal seam of rock blast hazard and vitrinite reflectance＜0.6%;
(2), in the coal seam, select certain area to hole, the quantity of boring, the degree of depth and direction satisfy the hole requirement of even cloth;
(3), with the port closing of holing;
(4), configuration aqueous slkali;
(5), the aqueous slkali infusion of configuration in boring, soak a period of time;
(6), adopt microseism, electromagnetic radiation or drilling cuttings mode to monitor, guarantee to eliminate Burst Tendency, repeat to soak repeatedly, until eliminate Burst Tendency fully;
(7), preventing and treating the bump measure with the conventional physical mode compares the effect that check chemical reaction mode is prevented and treated bump.
[OH in the described aqueous slkali
-]＞1 mol/L, aqueous slkali contacts with the low order coal seam, and chemical reaction namely occurs, and the coal seam mechanical strength sharply reduces, and presents plasticity, loses Burst Tendency.
Certain area refers to that digging produces stress and concentrates and maybe will produce the position that stress is concentrated in the described step (2), or the coal seam of Burst Tendency is arranged.
Soak time improves concentration and the soak time of corresponding raising aqueous slkali greater than 6 h in the described step (5) along with the coal rank.
Compare speed and construction fussy degree that content comprises operating cost, eliminates Burst Tendency in the described step (7).
Adopt technique scheme, when aqueous slkali is injected into the coal seam, owing to contain the organic matter of a large amount of similar humic acids in the low-order coal, chemical reaction occurs rapidly in both, organic matter is dissolved by extracting, and the mechanical strength of coal sharply reduces, and presents the plastic statees such as coal grain even coal slime, elastic energy disappears substantially, has lost Burst Tendency.How to reduce the mechanical strength of coal, brittle fracture is converted into plastic strain, the gathering of eliminating elastic energy is the key of Controlling of Coal Outburst, but the physical means such as the coal-bed flooding of adopting at present, release explosion and boring release can reduce the mechanical strength of coal, but the reduction degree is limited, elastic energy also might assemble and discharge, and Burst Tendency of Coal Seam still exists.The present invention can be fully and is reduced fast the mechanical strength of coal, and coal body is plasticity fully, and elastic energy loses the possibility of gathering, has improved the prevention effect of Bumping Pressure in Coal Layers, has reduced the Safety of Coal Mine Production cost.
The present invention mainly for
R O, maxThe bump that＜0.6% low order coal seam exists is prevented and treated, not only overcome the coal seam and absorbed the slow characteristics of water speed, and in the coal large amount of organic in case contact with aqueous slkali chemical reaction namely occur, the mechanical strength of coal sharply reduces, form class sapropelitic grain even coal slime, present plasticity fully, lose Burst Tendency.Press prophylactico-therapeutic measures to compare with conventional impact ground, it is effective not only to prevent and treat bump, and easy construction, safe, it is fast and thorough to eliminate Burst Tendency speed, with low cost, avoided the slow drawback of traditional waterflood infiltration rate, for the low order Bumping Pressure in Coal Layers provides a kind of new method of preventing and treating, in the low order coal seam, had broad application prospects.
The specific embodiment
The method of chemical reaction control Bumping Pressure in Coal Layers of the present invention may further comprise the steps successively:
(1), selects to exist the coal seam of rock blast hazard and vitrinite reflectance＜0.6%;
(2), in the coal seam, select certain area to hole, the quantity of boring, the degree of depth and direction satisfy the hole requirement of even cloth; Described certain area refers to that digging produces stress and concentrates and maybe will produce the position that stress is concentrated, or the coal seam of Burst Tendency is arranged.
(3), with the port closing of holing;
(4), dispose the aqueous slkali, [OH in the aqueous slkali
-]＞1 mol/L;
(5), the configuration the aqueous slkali infusion to boring in, soak time improves concentration and the soak time of corresponding raising aqueous slkali greater than 6 h along with the coal rank; In immersion process, aqueous slkali contacts with the low order coal seam, and chemical reaction namely occurs, and the coal seam mechanical strength sharply reduces, and presents plasticity, loses Burst Tendency;
(6), adopt microseism, electromagnetic radiation or drilling cuttings mode to monitor, guarantee to eliminate Burst Tendency, repeat to soak repeatedly, until eliminate Burst Tendency fully;
(7), preventing and treating the bump measure with the conventional physical mode compares the effect that check chemical reaction mode is prevented and treated bump; Relatively content comprises operating cost, eliminates the speed of Burst Tendency and the fussy degree of constructing.
The below enumerates a specific embodiment:
(1), selects to have the brown coal mine of Burst Tendency; (2), be evenly arranged boring at coal-face; (3), adopt the used sealing of hole mode of traditional coal seam water filling to carry out sealing of hole; (4), down-hole configuration [OH
-The NaOH solution of]=2 mol/L; (5), by pump into device the configuration aqueous slkali pour into each boring, injection rate equals the water injection rate of traditional coal seam, soak time greater than 6 h after; (6), adopt electromagnetic radiation to monitor, guarantee that the coal seam loses Burst Tendency fully, otherwise should repeat to soak repeatedly, until eliminate Burst Tendency fully; (7), according to construction operation cost, technique fussy degree and effect and time of eliminating Burst Tendency of Coal Seam, with physics mode contrasts such as traditional coal seam water filling, release explosion and boring releases, the check chemical mode is prevented and treated the practical application effect of low-order coal bump.Contrast under the same conditions the effect of construction operation cost and elimination bump, not only can save construction cost if confirm to adopt NaOH solution to eliminate Burst Tendency, can also raise the efficiency, just show that this chemical mode control Bumping Pressure in Coal Layers technique has significant effect and promotional value in low coal rank.
Claims (5)
1. chemical reaction is prevented and treated the method for Bumping Pressure in Coal Layers, it is characterized in that: may further comprise the steps successively:
(1), selects to exist the coal seam of rock blast hazard and vitrinite reflectance＜0.6%;
(2), in the coal seam, select certain area to hole, the quantity of boring, the degree of depth and direction satisfy the hole requirement of even cloth;
(3), with the port closing of holing;
(4), configuration aqueous slkali;
(5), the aqueous slkali infusion of configuration in boring, soak a period of time;
(6), adopt microseism, electromagnetic radiation or drilling cuttings mode to monitor, guarantee to eliminate Burst Tendency, repeat to soak repeatedly, until eliminate Burst Tendency fully;
(7), preventing and treating the bump measure with the conventional physical mode compares the effect that check chemical reaction mode is prevented and treated bump.
2. the method for chemical reaction control Bumping Pressure in Coal Layers according to claim 1 is characterized in that: [the OH in the described aqueous slkali
-]＞1 mol/L, aqueous slkali contacts with the low order coal seam, and chemical reaction namely occurs, and the coal seam mechanical strength sharply reduces, and presents plasticity, loses Burst Tendency.
3. chemical reaction according to claim 1 is prevented and treated the method for Bumping Pressure in Coal Layers, it is characterized in that: certain area refers to that digging produces stress and concentrates and maybe will produce the position that stress is concentrated in the described step (2), or the coal seam of Burst Tendency is arranged.
4. chemical reaction according to claim 1 is prevented and treated the method for Bumping Pressure in Coal Layers, it is characterized in that: soak time improves concentration and the soak time of corresponding raising aqueous slkali greater than 6 h in the described step (5) along with the coal rank.
5. the method for chemical reaction control Bumping Pressure in Coal Layers according to claim 1 is characterized in that: compare speed and construction fussy degree that content comprises operating cost, eliminates Burst Tendency in the described step (7).
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| CN201310010316.4A CN103061766B (en) | 2013-01-11 | 2013-01-11 | Method for preventing and controlling coalbed rockburst through chemical reaction |
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Cited By (6)
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|---|---|---|---|---|
| CN103470296A (en) * | 2013-09-03 | 2013-12-25 | 河南理工大学 | Method for underground coal mine dust removal by aqueous alkali |
| CN104005766A (en) * | 2014-05-12 | 2014-08-27 | 山西蓝焰煤层气集团有限责任公司 | Chemical method for weakening of top coal |
| CN104358585A (en) * | 2014-11-29 | 2015-02-18 | 西安科技大学 | Method of pressure relief of coal body of high-dipping super high seam |
| CN110630267A (en) * | 2019-09-23 | 2019-12-31 | 辽宁大学 | Water injection formula for reducing impact tendency of coal seam water injection and detection device for coal seam water injection effect |
| CN115492575A (en) * | 2022-09-20 | 2022-12-20 | 山东理工大学 | Alkali liquor modification and strengthening pressure relief method for coal bed rock burst drilling |
| CN117588261A (en) * | 2023-10-19 | 2024-02-23 | 西安科技大学 | Method for sensing ground stress concentration of coal mine tunnel digging and anchoring integrated working face |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470296A (en) * | 2013-09-03 | 2013-12-25 | 河南理工大学 | Method for underground coal mine dust removal by aqueous alkali |
| CN103470296B (en) * | 2013-09-03 | 2016-05-18 | 河南理工大学 | A kind of dust removing down-hole of coal mine method of utilizing aqueous slkali |
| CN104005766A (en) * | 2014-05-12 | 2014-08-27 | 山西蓝焰煤层气集团有限责任公司 | Chemical method for weakening of top coal |
| CN104358585A (en) * | 2014-11-29 | 2015-02-18 | 西安科技大学 | Method of pressure relief of coal body of high-dipping super high seam |
| CN110630267A (en) * | 2019-09-23 | 2019-12-31 | 辽宁大学 | Water injection formula for reducing impact tendency of coal seam water injection and detection device for coal seam water injection effect |
| CN110630267B (en) * | 2019-09-23 | 2021-08-24 | 辽宁大学 | Water injection formula for reducing impact tendency of coal seam water injection and detection device for coal seam water injection effect |
| CN115492575A (en) * | 2022-09-20 | 2022-12-20 | 山东理工大学 | Alkali liquor modification and strengthening pressure relief method for coal bed rock burst drilling |
| CN117588261A (en) * | 2023-10-19 | 2024-02-23 | 西安科技大学 | Method for sensing ground stress concentration of coal mine tunnel digging and anchoring integrated working face |
| CN117588261B (en) * | 2023-10-19 | 2024-04-16 | 西安科技大学 | Method for sensing ground stress concentration of coal mine tunnel digging and anchoring integrated working face |
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| CN103061766B (en) | 2015-07-15 |
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