CN114961636B - Fixed-point grouting sealing method for underground complex-structure stratum of coal mine - Google Patents
Fixed-point grouting sealing method for underground complex-structure stratum of coal mine Download PDFInfo
- Publication number
- CN114961636B CN114961636B CN202210706334.5A CN202210706334A CN114961636B CN 114961636 B CN114961636 B CN 114961636B CN 202210706334 A CN202210706334 A CN 202210706334A CN 114961636 B CN114961636 B CN 114961636B
- Authority
- CN
- China
- Prior art keywords
- grouting
- rubber plug
- packer
- packing device
- coal mine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003245 coal Substances 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 title claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 25
- 238000012856 packing Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 6
- 230000009918 complex formation Effects 0.000 claims description 4
- 239000012779 reinforcing material Substances 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to a fixed-point grouting sealing method for a stratum with a complex structure under a coal mine, which belongs to the field of coal mine machinery and comprises the following steps: s1: assembling a packing device: sequentially assembling a safety joint, a rubber plug seat, a differential pressure sliding sleeve, a packer and a setting sliding sleeve to a preset hole section; s2: setting of the packing device: pumping high-pressure clean water to drive the packer to open so as to seal an annular area between the packing device and the borehole wall; s3: grouting operation: injecting through a grouting channel formed by the packing device; s4: cleaning grouting materials: putting a rubber plug to clean grouting materials; s5: and (3) drill withdrawal: withdrawing the drilling tool in the hardening material waiting time of different hole depths; the grouting device sequentially performs setting, grouting operation, cleaning grouting materials and drill withdrawal, improves grouting pressure, grouting effect and grouting efficiency, is good in stability and high in safety, and can ensure fixed-point grouting reinforcement.
Description
Technical Field
The invention belongs to the field of coal mine machinery, and relates to a fixed-point grouting sealing method for a stratum with a complex structure under a coal mine.
Background
The geological conditions of coal mines in China are complex, structural broken strata such as faults and collapse columns are often drilled in the underground drilling construction process, the conditions such as hole collapse, drill sticking and drill holding are easy to occur when drilling in the structural broken strata, and the problems such as poor pore forming property, shallow pore forming depth and hole accidents are caused.
In recent years, grouting reinforcement technology is gradually adopted to solve the problem of difficult drilling of a broken stratum shallow hole, two grouting modes are mainly adopted, namely full-hole section grouting reinforcement technology and local grouting reinforcement technology, wherein full-hole section grouting is directly used for sealing an orifice and injecting grouting materials, the problems of short adaptive hole section, large grouting material waste, poor grouting reinforcement effect exist, the current local grouting technology is not suitable for grouting reinforcement in the field of long drilling, when the drilling is long, a hole packer grouting pipe and a high-pressure rubber pipe of the grouting reinforcement technology are mutually wound and knotted in a narrow drilling hole, pipe explosion accidents are caused, the hole packer and the high-pressure rubber pipe are easily worn in the descending process of the hole packer and the high-pressure rubber pipe, leakage and grouting failure are easily caused, and the problems of grouting holes Duan Duan, small grouting pressure, poor stratum reinforcement effect and the like exist.
Disclosure of Invention
In view of the above, the invention provides a method for fixed-point grouting and sealing of a stratum with a complex structure in a coal mine, which aims to solve the problems of low grouting pressure, poor grouting effect and low grouting efficiency in the existing deep hole fixed-point grouting in the coal mine.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a fixed-point grouting sealing method for underground complex-structure stratum of coal mine comprises the following steps:
s1: assembling a packing device: sequentially assembling a safety joint, a rubber plug seat, a differential pressure sliding sleeve, a packer and a setting sliding sleeve to a preset hole section;
s2: setting of the packing device: pumping high-pressure clean water to drive the packer to open so as to seal an annular area between the packing device and the borehole wall;
s3: grouting operation: injecting through a grouting channel formed by the packing device;
s4: cleaning grouting materials: putting a rubber plug to clean grouting materials;
s5: and (3) drill withdrawal: and (5) withdrawing the drilling tool in the hardening time of the reinforcing materials with different hole depths.
Further, in step S1, the safety joint is externally connected with a grouting drill rod and a drilling machine.
Further, in the step S2, after the packer is opened and sealed, the pressure is continuously suppressed until the setting sliding sleeve is opened.
Further, in step S3, the grouting channel is externally connected with a grouting pipe column.
Further, in the step S4, the replacement is finished after the rubber plug enters the rubber plug seat.
Further, when the rubber plug smoothly enters the rubber plug seat: driving the packer to release pressure and shrink by a certain distance of the back grouting pipe column of the drilling machine, and finally recovering the packing device; when the rubber plug cannot smoothly enter the rubber plug seat: and the pressure is continuously increased until the pressure difference sliding sleeve pressure release valve is opened, so that the rubber plug can be smoothly replaced and enter the rubber plug seat, and grouting materials can be completely replaced.
Further, in step S5, the packing device is smoothly recovered during the drill withdrawal process: the drilling machine retreats the grouting pipe column for a certain distance to drive the packer to release pressure and shrink, and the packer device is recovered; when the blocking device is recovered in the drill withdrawal process, the blocking device is blocked: the grouting pipe column is rotated forward through the drilling machine for a plurality of circles, the safety joint is driven to rotate forward, then the grouting pipe column is retreated, the safety joint is separated, the grouting pipe column is recovered, and the packing device is left in the hole.
The invention has the beneficial effects that:
1. the method for sealing the underground complex-structure stratum fixed-point grouting of the coal mine sequentially comprises the steps of setting by the sealing device, grouting operation, cleaning grouting materials and drilling withdrawal, so that grouting pressure, grouting effect and grouting efficiency are improved, stability is good, safety is high, and fixed-point grouting reinforcement can be ensured.
2. The fixed-point grouting sealing method for the underground complex-structure stratum of the coal mine ensures that the grouting pipe column is recovered in the drilling withdrawal process, and saves the cost.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a packer in a method for sealing a coal mine underground complex formation by fixed-point grouting.
Reference numerals: the pressure differential sliding sleeve comprises a safety joint 1, a rubber plug seat 2, a pressure differential sliding sleeve 3, a packer 4 and a setting sliding sleeve 5.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
The fixed-point grouting sealing method for the underground complex-structure stratum of the coal mine shown in fig. 1 comprises the following steps:
s1: assembling a packing device: the method comprises the steps of sequentially assembling a safety joint 1, a rubber plug seat 2, a differential pressure sliding sleeve 3, a packer 4 and a setting sliding sleeve 5 to a preset hole section; the safety joint is externally connected with a grouting drill rod and a drilling machine.
S2: setting of the packing device: pumping high-pressure clean water to drive the packer 4 to open so as to seal an annular area between the packing device and the borehole wall; after the packer 4 is opened and sealed, the pressure is continuously suppressed until the setting sliding sleeve 5 is opened.
S3: grouting operation: injecting through a grouting channel formed by the packing device; the grouting channel is externally connected with a grouting pipe column.
S4: cleaning grouting materials: putting a rubber plug to clean grouting materials; the rubber plug enters the rubber plug seat 2 and then is replaced;
when the rubber plug smoothly enters the rubber plug seat 2: the packer 4 is driven to release pressure and shrink by a certain distance of a back grouting pipe column of the drilling machine, and finally the packing device is recovered; when the rubber plug cannot smoothly enter the rubber plug seat 2: and the pressure is continuously increased until the pressure difference sliding sleeve 3 is opened, so that the rubber plug is ensured to be displaced and smoothly enter the rubber plug seat 2, and grouting materials are completely displaced.
S5: and (3) drill withdrawal: withdrawing the drilling tool in the hardening material waiting time of different hole depths; and the packing device is smoothly recovered in the drilling withdrawal process: the drilling machine retreats the grouting pipe column for a certain distance to drive the packer 4 to release pressure and shrink, and the packing device is recovered; when the blocking device is recovered in the drill withdrawal process, the blocking device is blocked: the grouting pipe column is rotated forward through the drilling machine for a plurality of circles, the safety joint 1 is driven to rotate forward, then the grouting pipe column is retreated, the safety joint 1 is separated, the grouting pipe column is recovered, and the packing device is left in the hole.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (5)
1. The fixed-point grouting sealing method for the underground complex-structure stratum of the coal mine is characterized by comprising the following steps of:
s1: assembling a packing device: sequentially assembling a safety joint, a rubber plug seat, a differential pressure sliding sleeve, a packer and a setting sliding sleeve to a preset hole section;
s2: setting of the packing device: pumping high-pressure clean water to drive the packer to open so as to seal an annular area between the packing device and the borehole wall;
s3: grouting operation: injecting through a grouting channel formed in the packing device;
s4: cleaning grouting materials: and putting the rubber plug cleaning grouting material, and after the rubber plug enters the rubber plug seat, displacing, and when the rubber plug smoothly enters the rubber plug seat: driving the packer to release pressure and shrink by a certain distance of the back grouting pipe column of the drilling machine, and finally recovering the packing device; when the rubber plug cannot smoothly enter the rubber plug seat: continuing to boost until the pressure difference sliding sleeve pressure release valve is opened, ensuring that the rubber plug is displaced and smoothly enters the rubber plug seat, and completely displacing grouting materials;
s5: and (3) drill withdrawal: and (5) withdrawing the drilling tool in the hardening time of the reinforcing materials with different hole depths.
2. The method for fixed-point grouting and sealing of underground complex formation of coal mine as claimed in claim 1, wherein the safety joint in the step S1 is externally connected with a grouting drill rod and a drilling machine.
3. The method for fixed-point grouting and sealing of underground complex-structure strata of coal mine according to claim 1, wherein in the step S2, after the packer is opened and sealed, the pressure is continuously suppressed until the setting sliding sleeve is opened.
4. The method for fixed-point grouting sealing of underground complex formation of coal mine as claimed in claim 1, wherein the grouting channel in the step S3 is externally connected with a grouting pipe column.
5. The method for fixed-point grouting and sealing of a coal mine underground complex formation according to claim 1, wherein in the step S5, the packer device is successfully recovered during the drill withdrawal process: the drilling machine retreats the grouting pipe column for a certain distance to drive the packer to release pressure and shrink, and the packer device is recovered; when the blocking device is recovered in the drill withdrawal process, the blocking device is blocked: the grouting pipe column is rotated forward through the drilling machine for a plurality of circles, the safety joint is driven to rotate forward, then the grouting pipe column is retreated, the safety joint is separated, the grouting pipe column is recovered, and the packing device is left in the hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210706334.5A CN114961636B (en) | 2022-06-21 | 2022-06-21 | Fixed-point grouting sealing method for underground complex-structure stratum of coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210706334.5A CN114961636B (en) | 2022-06-21 | 2022-06-21 | Fixed-point grouting sealing method for underground complex-structure stratum of coal mine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114961636A CN114961636A (en) | 2022-08-30 |
| CN114961636B true CN114961636B (en) | 2023-09-01 |
Family
ID=82970872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210706334.5A Active CN114961636B (en) | 2022-06-21 | 2022-06-21 | Fixed-point grouting sealing method for underground complex-structure stratum of coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114961636B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6120214A (en) * | 1999-01-20 | 2000-09-19 | Layne Christensen Company | Process for constructing reinforced subterranean columns |
| CN101761319A (en) * | 2009-12-29 | 2010-06-30 | 中国石油天然气集团公司 | Method for injecting injection fluid by outside-tube chemical packer |
| CN202140062U (en) * | 2011-06-30 | 2012-02-08 | 中国石油集团川庆钻探工程有限公司 | Hydraulic drilling-free tail pipe suspension packer |
| CN202194613U (en) * | 2011-06-30 | 2012-04-18 | 中国石油集团川庆钻探工程有限公司 | Hydraulic drilling-free suspension packer |
| CN102635327A (en) * | 2012-04-01 | 2012-08-15 | 天地科技股份有限公司 | Grouting method and system of cracked coal rock mass |
| KR20150005054A (en) * | 2013-07-04 | 2015-01-14 | 이광익 | Tunnel grouting reinforcement method |
| CN204532233U (en) * | 2015-01-04 | 2015-08-05 | 中国石油天然气股份有限公司 | Well cementation tubular column combination |
| CN109296337A (en) * | 2018-10-19 | 2019-02-01 | 东营百华石油技术开发有限公司 | Full-bore exempts to bore plug hook-up for cementing |
| CN111472717A (en) * | 2020-04-24 | 2020-07-31 | 中煤科工集团重庆研究院有限公司 | Fixed-point reinforcing method for long borehole in coal mine |
| CN113107418A (en) * | 2021-03-25 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Sectional pressure-maintaining grouting device and method for horizontal drilling of coal seam floor aquifer |
| CN113309487A (en) * | 2021-05-24 | 2021-08-27 | 中煤科工集团西安研究院有限公司 | Recoverable fixed-point grouting device and method for directional long drilling hole in underground coal mine |
| CN113494264A (en) * | 2021-07-09 | 2021-10-12 | 中煤科工集团西安研究院有限公司 | Water-resisting layer reinforced grouting transformation device and method based on staged fracturing |
-
2022
- 2022-06-21 CN CN202210706334.5A patent/CN114961636B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6120214A (en) * | 1999-01-20 | 2000-09-19 | Layne Christensen Company | Process for constructing reinforced subterranean columns |
| CN101761319A (en) * | 2009-12-29 | 2010-06-30 | 中国石油天然气集团公司 | Method for injecting injection fluid by outside-tube chemical packer |
| CN202140062U (en) * | 2011-06-30 | 2012-02-08 | 中国石油集团川庆钻探工程有限公司 | Hydraulic drilling-free tail pipe suspension packer |
| CN202194613U (en) * | 2011-06-30 | 2012-04-18 | 中国石油集团川庆钻探工程有限公司 | Hydraulic drilling-free suspension packer |
| CN102635327A (en) * | 2012-04-01 | 2012-08-15 | 天地科技股份有限公司 | Grouting method and system of cracked coal rock mass |
| KR20150005054A (en) * | 2013-07-04 | 2015-01-14 | 이광익 | Tunnel grouting reinforcement method |
| CN204532233U (en) * | 2015-01-04 | 2015-08-05 | 中国石油天然气股份有限公司 | Well cementation tubular column combination |
| CN109296337A (en) * | 2018-10-19 | 2019-02-01 | 东营百华石油技术开发有限公司 | Full-bore exempts to bore plug hook-up for cementing |
| CN111472717A (en) * | 2020-04-24 | 2020-07-31 | 中煤科工集团重庆研究院有限公司 | Fixed-point reinforcing method for long borehole in coal mine |
| CN113107418A (en) * | 2021-03-25 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Sectional pressure-maintaining grouting device and method for horizontal drilling of coal seam floor aquifer |
| CN113309487A (en) * | 2021-05-24 | 2021-08-27 | 中煤科工集团西安研究院有限公司 | Recoverable fixed-point grouting device and method for directional long drilling hole in underground coal mine |
| CN113494264A (en) * | 2021-07-09 | 2021-10-12 | 中煤科工集团西安研究院有限公司 | Water-resisting layer reinforced grouting transformation device and method based on staged fracturing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114961636A (en) | 2022-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105332684B (en) | A kind of water under high pressure is quick-fried and CO2The coal bed gas displacement extraction technique that pressure break is combined | |
| CN101307695B (en) | Coal mine gas pre-draining borehole sealing method adopting aerated capsule as temporary hole bottom | |
| CN205063929U (en) | Colliery is sealed in pit and is pressed integration segmentation hydraulic fracturing device | |
| CN105804786B (en) | A kind of weak seam bottom plate layer-through drilling pressure rushes anti-reflection method | |
| CN104080999B (en) | The method that pressure break is carried out while drilling well | |
| CN104652496A (en) | Detection method of underground continuous wall water seepage | |
| CN111021959A (en) | Well drilling method for preventing water accumulation in goaf | |
| CN110410053A (en) | Coal mine roof plate pressure relief method based on eyelet supporting | |
| CN205297337U (en) | Hole reaming and digging device for well drilling | |
| RU2312972C2 (en) | Method and device for fluid-containing reservoir isolation | |
| CN207004498U (en) | Infinite stages switching sliding sleeve fracturing tool | |
| CN114961636B (en) | Fixed-point grouting sealing method for underground complex-structure stratum of coal mine | |
| CN112627723A (en) | Ground drilling method for coal bed gas development of coal mine goaf | |
| CN111101917B (en) | Coal seam hydraulic fracturing combined resonance gas extraction method and hole packer | |
| CN111706305A (en) | Selective segmented well cementation process and well body structure of double-target-layer coal bed gas well | |
| CN111472717A (en) | Fixed-point reinforcing method for long borehole in coal mine | |
| CN107542423A (en) | A kind of sieve tube completion horizontal well expansion sleeve pipe shutoff method | |
| CN108979583A (en) | A kind of sidetracked hole layer and section cementing unit and application method | |
| CN113006750B (en) | Construction tool and method for improving recovery ratio of low-permeability reservoir horizontal well | |
| CN104481412A (en) | Well drilling device | |
| CN204371108U (en) | Drilling rig | |
| CN201202429Y (en) | Expansion tube hanging seal device for open hole section | |
| CN113006763A (en) | Fracturing and energy supplementing integrated device for tight sandstone oil reservoir and application method | |
| CN113123762A (en) | Fracturing method for coal bed gas multi-branch horizontal well | |
| CN205840841U (en) | A kind of single-direction balls valve type cement stripper tube piecing devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |