CN112031774B - Deep coal seam goaf buried pipe heat extraction method - Google Patents
Deep coal seam goaf buried pipe heat extraction method Download PDFInfo
- Publication number
- CN112031774B CN112031774B CN202010922636.7A CN202010922636A CN112031774B CN 112031774 B CN112031774 B CN 112031774B CN 202010922636 A CN202010922636 A CN 202010922636A CN 112031774 B CN112031774 B CN 112031774B
- Authority
- CN
- China
- Prior art keywords
- coal seam
- heat
- heat exchange
- mining
- pipeline
- 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
- 239000003245 coal Substances 0.000 title claims abstract description 42
- 238000000605 extraction Methods 0.000 title claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000005065 mining Methods 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000010248 power generation Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000004020 conductor Substances 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
-
- 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
- Y02E10/10—Geothermal energy
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a deep coal seam goaf pipe burying and heat taking method which comprises the following steps that firstly, an auxiliary well enters a deep coal seam mining area, a concentrated heat exchange station is arranged at a first horizontal position of the deep coal seam mining area, the concentrated heat exchange station is connected to a working face of deep coal seam mining through a concentrated heat exchange pipeline, and the concentrated heat exchange pipeline is combined with the concentrated heat exchange station and used for injecting cold water into the working face and transporting hot water to the ground; and secondly, arranging a water inlet pipe and a water outlet pipe on the working face along the left and right crossroads respectively, arranging a plurality of transverse heat taking pipelines along the pushing of the working face, wherein two ends of each transverse heat taking pipeline are respectively communicated with the water inlet pipe and the water outlet pipe, and filling the transverse heat taking pipelines through heat conducting materials after each transverse heat taking pipeline is laid, so that the purposes of mining while paving and backfilling are realized. The heat is extracted through water injection, the temperature of the goaf is reduced, the influence on the mining progress of the working face is small, and meanwhile, the safe mining and the long-term utilization of the geothermal energy of the goaf can be ensured.
Description
Technical Field
The invention belongs to the technical field of deep coal seam mining, and particularly relates to a deep coal seam goaf pipe-burying heat-taking method.
Background
Geothermal resources are the second most renewable clean energy which is discovered by human and is only next to solar energy, and the geothermal resources in China are rich, and the total amount of the geothermal resources accounts for about 7.9 percent of the total amount of the global geothermal resources, compared with solar energy, wind energy, nuclear energy and the like, the geothermal resources have the characteristics of rich resource reserves, wide resource distribution range, lower mining cost, wide application range and the like, and can be used for heating, power generation and the like of houses in winter;
the method for exploiting geothermal water at the present stage is easy to cause the underground water level to drop, further causes the bottom layer to be damaged, and causes the ground settlement, and the underground buried pipe heat extraction can effectively protect the stratum and avoid the large-scale ground settlement phenomenon. In the existing deep coal seam mining, a large number of drill holes are usually constructed before mining so as to arrange pipelines, and the buried pipes in the goaf utilize a working face roadway to the maximum extent, so that the workload of drill hole arrangement is reduced. The main problems existing at present are: (1) A large number of drill holes are required to be independently arranged and heat extraction pipelines are laid, so that the utilization rate of the drill holes is low and the heat extraction cost is high; (2) After a goaf is formed after coal seam mining, geothermal energy of the goaf is difficult to utilize.
Disclosure of Invention
The invention aims to provide a buried pipe heat extraction method for a deep coal seam goaf, which can reduce the temperature of the goaf through water injection and heat extraction, has small influence on the mining progress of a working face, and can ensure safe mining and long-term utilization of the geothermal energy of the goaf.
Therefore, the technical scheme adopted by the invention is as follows: a deep coal seam goaf buried pipe heat extraction method comprises the following steps:
the method comprises the following steps that firstly, an auxiliary well enters a deep coal seam mining area, a centralized heat exchange station is arranged at a first horizontal position of the deep coal seam mining area, the centralized heat exchange station is connected to a working face for deep coal seam mining through a centralized heat exchange pipeline, and the centralized heat exchange pipeline is combined with the centralized heat exchange station and used for injecting cold water into the working face and transporting hot water to the ground;
and secondly, arranging a water inlet pipe and a water outlet pipe on the working face along the left and right crossroads respectively, arranging a plurality of transverse heat taking pipelines along the pushing of the working face, wherein two ends of each transverse heat taking pipeline are communicated with the water inlet pipe and the water outlet pipe respectively, filling the transverse heat taking pipelines through a heat conducting material after each transverse heat taking pipeline is laid, realizing the purpose of backfilling while mining, and backfilling in time through a goaf to prevent the roof from falling off and damaging the pipelines.
Preferably, if the mined coal seam is thick, performing downward layered mining on the coal seam, arranging pipelines according to the method in the step two, and filling until the pipe burying of the goaf is completed and the goaf is filled. The heat extraction area of the goaf is increased by arranging a plurality of layers of heat extraction pipelines, and the utilization rate of heat of the goaf is improved; the long-term heat extraction in the goaf can be ensured, and the roof can be prevented from falling off to damage the pipeline.
More preferably, the multiple layers of transverse heat extraction pipelines of the same goaf are laid at equal intervals. And a transverse heat taking pipeline which is uniformly laid transversely and vertically is formed in the same goaf, so that a heat taking grating is formed, the structure is stable and reliable, the heat taking grating is durable, and long-term heat taking can be met.
Further preferably, the end of the transverse heat taking pipeline is connected with a water inlet pipe or a water outlet pipe through a tee joint, so that the transverse heat taking pipeline is convenient and quick to install; a plurality of three-way joints are preset on the water inlet pipe and the water outlet pipe according to the quantity and the positions of the transverse heat taking pipelines laid on the water inlet pipe and the water outlet pipe, one of the three-way joints is plugged, and when the transverse heat taking pipelines need to be connected along the pushing of a working face, the plugging ports of the corresponding three-way joints are opened and connected with the transverse heat taking pipelines.
Preferably, the hot water outlet pipe of the water outlet pipe and the hot water outlet pipe of the concentrated heat exchange pipeline are subjected to heat insulation treatment, so that high temperature in a heat damage area is prevented from being diffused to other workplaces, and along with the advance of a working face, in order to ensure the safety of coal seam mining personnel, the danger caused by a high-temperature heat taking pipeline can be avoided by adopting a heat insulation treatment mode.
Further preferably, in the case of mining on multiple working faces, if the distance from the concentrated heat exchange station to the rest of the horizontal heat extraction places is long, vertical and horizontal drill holes are drilled in each mining area by the concentrated heat exchange station, so that the arrangement length of the concentrated heat exchange pipeline is reduced.
More preferably, the hot water taken by the centralized heat exchange pipeline is sent to a ground power plant to reduce the coal burning amount required by power generation or sent to indoor heating.
The invention has the beneficial effects that: (1) The existing auxiliary well and crossheading for coal seam mining are directly utilized to lay a concentrated heat exchange pipeline, a water inlet pipe, a water outlet pipe and a concentrated heat exchange station, and additional independent drilling and pipe laying are not needed, so that the workload is reduced, and the construction progress is accelerated; (2) The laying direction of the concentrated heat exchange pipeline is just opposite to the advancing direction of the working face, so that the transverse heat taking pipeline can be conveniently and continuously laid along the working face, the operation sequence comprises coal mining, pipeline arrangement and backfilling, the effects of mining while paving and backfilling are achieved, the transverse heat taking pipeline is sequentially arranged along with the advancing of three belts of a goaf, the construction is more convenient, meanwhile, the temperature of the goaf of the working face can be reduced, and the heat accumulation of a spontaneous combustion zone and the goaf is reduced; (3) After the transverse heat taking pipeline is arranged in the goaf, the goaf is backfilled by using a material with good heat conductivity along with the mining progress, so that the geothermal energy of the goaf can be utilized for a long time, and the goaf can be used once and for all; (4) The comprehensive utilization of the concentrated heat exchange pipeline, the water inlet pipe, the water outlet pipe and the transverse heat taking pipeline can reduce the turning to the maximum extent when the pipelines are laid, and greatly reduce the water injection resistance.
Drawings
FIG. 1 is a diagram of a deep coal seam goaf buried pipe heat removal system.
Figure 2 is a top view of the working surface and gob of figure 1.
FIG. 3 is a schematic illustration of multiple upper and lower face mining.
Detailed Description
The invention will be further illustrated by the following examples in conjunction with the accompanying drawings:
a deep coal seam goaf buried pipe heat extraction method comprises the following steps:
in a first step, as shown in FIG. 3, the deep coal seam mining area typically involves mining at multiple levels, with the highest located coal seam mining area being referred to as the "first level".
Referring to fig. 1 and 2, the auxiliary shaft 1 enters a deep coal seam mining area, a concentrated heat exchange station 2 is arranged at a first horizontal position of the deep coal seam mining area, the concentrated heat exchange station 2 is connected to a working face 10 for deep coal seam mining through a concentrated heat exchange pipeline 3, and the concentrated heat exchange pipeline 3 is used for injecting cold water into the working face 10 and transporting hot water to the ground in combination with the concentrated heat exchange station 2. The concentrated heat exchange pipelines 3 are laid downwards along the auxiliary shaft 1 and pass through the concentrated heat exchange station 2 at the first horizontal position to reach the working surface 10, one concentrated heat exchange pipeline 3 is a cold water inlet pipe, and the other concentrated heat exchange pipeline 3 is a hot water outlet pipe.
In the second step, the left and right sides of the working surface are respectively provided with a gate way 5. The working surface is respectively provided with a water inlet pipe 7 and a water outlet pipe 8 along the left and the right gate grooves 5, namely, the water inlet pipe 7 is arranged in one gate groove 5, and the water outlet pipe 8 is arranged in the other gate groove 5. And a plurality of transverse heat extracting pipelines 9 are sequentially arranged along the advancing direction of the working face, and each section of the working face is advanced, and the transverse heat extracting pipelines 9 are arranged along the advancing direction. Two ends of each transverse heat-taking pipeline 9 are respectively communicated with the water inlet pipe 7 and the water outlet pipe 8, and finally a plurality of transverse heat-taking pipelines 9 which are parallel to each other and arranged at intervals are paved between the water inlet pipe 7 and the water outlet pipe 8. After each transverse heat taking pipeline 9 is laid, the transverse heat taking pipeline is timely filled through the heat conducting material 6, so that the backfilling while mining and paving is realized, and the backfilling after mining is timely backfilled through the goaf 4 through the heat conducting material, so that the long-term heat taking after mining can be ensured, and the pipelines can be prevented from being damaged by roof falling.
Preferably, if the mined coal seam is thick, downward layered mining is carried out on the coal seam, a transverse heat taking pipeline is arranged according to the method in the step two and filled by using heat conducting materials, then the mining and pipe burying of the lower layer is carried out, and the process is circulated until the goaf pipe burying is finished and filled, so that the heat taking range of the goaf 4 is expanded.
The multiple layers of transverse heat extraction pipelines 9 of the same goaf 4 are preferably laid at equal intervals. In addition, the end of the transverse heat taking pipeline 9 is connected with the water inlet pipe 7 or the water outlet pipe 8 through a three-way joint.
Preferably, the hot water outlet pipe part of the water outlet pipe 8 and the concentrated heat exchange pipeline 3 is subjected to heat insulation treatment, so that high temperature in a heat damage area is prevented from being diffused to other working places.
For the condition of mining of a plurality of working faces, if the distance from the concentrated heat exchange station 2 to other horizontal heat taking places is longer, vertical and horizontal drill holes are drilled on each mining area by the concentrated heat exchange station 2, so that the arrangement length of the concentrated heat exchange pipeline 3 is reduced.
The hot water taken by the concentrated heat exchange pipeline 3 is sent to a ground power plant to reduce the coal burning amount required by power generation or sent to indoor heating.
Claims (5)
1. A deep coal seam goaf buried pipe heat extraction method is characterized by comprising the following steps:
the method comprises the following steps that firstly, an auxiliary well (1) enters a deep coal seam mining area, a concentrated heat exchange station (2) is arranged at a first horizontal position of the deep coal seam mining area, the concentrated heat exchange station (2) is connected to a working face (10) for deep coal seam mining through a concentrated heat exchange pipeline (3), and the concentrated heat exchange pipeline (3) is combined with the concentrated heat exchange station (2) and used for injecting cold water into the working face (10) and transporting hot water to the ground;
secondly, respectively arranging a water inlet pipe (7) and a water outlet pipe (8) on a working face along a left crossheading and a right crossheading (5), arranging a plurality of transverse heat taking pipelines (9) along with the pushing of the working face, wherein two ends of each transverse heat taking pipeline (9) are respectively communicated with the water inlet pipe (7) and the water outlet pipe (8), and timely filling the transverse heat taking pipelines through a heat conduction material (6) after each transverse heat taking pipeline (9) is laid, so that the aim of backfilling while mining is realized, and timely backfilling is realized through a goaf (4) to prevent a roof from falling and damaging the pipelines; the hot water outlet pipe part of the water outlet pipe (8) and the concentrated heat exchange pipeline (3) is subjected to heat insulation treatment, so that high temperature of a heat damage area is prevented from being diffused to other workplaces;
for the condition of mining of a plurality of working faces, if the distance from the concentrated heat exchange station (2) to other horizontal heat taking places is longer, vertical and horizontal drill holes are drilled on each mining area by the concentrated heat exchange station (2) so as to reduce the arrangement length of the concentrated heat exchange pipeline (3).
2. The deep coal seam gob buried pipe heat extraction method of claim 1, characterized in that: and if the mined coal seam is thick, performing downward layered mining on the coal seam, arranging the transverse heat taking pipeline (9) according to the method in the step two and filling until the goaf (4) is buried and filled.
3. The deep coal seam gob buried pipe heat removal method according to claim 2, characterized in that: the multiple layers of transverse heat taking pipelines (9) in the same goaf (4) are laid at equal intervals.
4. The deep coal seam gob buried pipe heat removal method of claim 1, characterized in that: the end of the transverse heat taking pipeline (9) is connected with the water inlet pipe (7) or the water outlet pipe (8) through a three-way joint.
5. The deep coal seam gob buried pipe heat extraction method of claim 1, characterized in that: the hot water obtained by the concentrated heat exchange pipeline (3) is sent to a ground power plant to reduce the coal burning amount required by power generation or sent to indoor heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010922636.7A CN112031774B (en) | 2020-09-04 | 2020-09-04 | Deep coal seam goaf buried pipe heat extraction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010922636.7A CN112031774B (en) | 2020-09-04 | 2020-09-04 | Deep coal seam goaf buried pipe heat extraction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112031774A CN112031774A (en) | 2020-12-04 |
| CN112031774B true CN112031774B (en) | 2022-12-27 |
Family
ID=73590992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010922636.7A Active CN112031774B (en) | 2020-09-04 | 2020-09-04 | Deep coal seam goaf buried pipe heat extraction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112031774B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187440B (en) * | 2021-06-08 | 2022-04-26 | 中国地质大学（北京） | Thermal mining equipment for deep coal bed gas |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230396A (en) * | 2011-05-31 | 2011-11-02 | 大连大学 | Filling method capable of exploring while filling coal mine goaf |
| CN107726439A (en) * | 2017-09-14 | 2018-02-23 | 河南理工大学 | A kind of heating system using coal mine gob thermal source |
| CN108252714B (en) * | 2018-01-10 | 2019-11-19 | 中国矿业大学 | A kind of deep coal cooperates with winning apparatus and method with underground heat |
| CN108222938B (en) * | 2018-02-07 | 2020-01-03 | 西安科技大学 | Combined grouting filling mining method for large-inclination-angle coal seam goaf |
| CN109057796B (en) * | 2018-09-12 | 2021-01-12 | 中国矿业大学 | Coal-heat co-mining method based on high-geothermal mine |
| CN109883074B (en) * | 2019-03-29 | 2020-07-14 | 中国矿业大学 | System for extracting geothermal energy from goaf filling body and working method thereof |
-
2020
- 2020-09-04 CN CN202010922636.7A patent/CN112031774B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112031774A (en) | 2020-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109057796B (en) | Coal-heat co-mining method based on high-geothermal mine | |
| CN206419171U (en) | A kind of geothermal exploitation system | |
| CN111911224B (en) | Hot gas co-mining method for deep coal seam roof drilling coal | |
| WO2021232905A1 (en) | Coal-terrestrial heat collaborative mining method based on fault water conducting fissure zone | |
| CN103244089B (en) | The exploitation method of microwave radiation technology solvent extraction viscous crude | |
| CN109883074B (en) | System for extracting geothermal energy from goaf filling body and working method thereof | |
| CN111043780B (en) | Hydrothermal multi-branch directional mining and grouting geothermal well and construction method | |
| US20210010718A1 (en) | Geothermal development system and the construction method thereof | |
| CN103225497B (en) | Exploitation method of vaporizing formation water and displacing heavy oil by microwaves in situ | |
| CN110030745B (en) | Geothermal development system and construction method thereof | |
| CN106704123A (en) | Geothermal exploitation system and construction method thereof | |
| CN106949649B (en) | Geothermal energy dry-heat rock tree-shaped multipoint heat exchange system and heat exchange method thereof | |
| CN112031774B (en) | Deep coal seam goaf buried pipe heat extraction method | |
| CN107461951A (en) | A kind of deep earth heart energy development approach | |
| CN111927454B (en) | Ultra-long drilling water exploration and geothermal integrated mining method for deep coal seam | |
| CN103925738A (en) | Open single-tube vertical borehole ground-coupled heat pump system | |
| CN205561615U (en) | Ground depth of origin well energy storage exchange system land used buries heat exchange tube | |
| CN103088740A (en) | Solar energy-ground source heat pump combined heat storage heating system for cold area tunnel pavements | |
| CN103088873A (en) | Cold region tunnel fire fighting pipeline solar energy-ground source heat pump united heat storage heating system | |
| CN111911159B (en) | Deep coal seam mining goaf filling geothermal mining method | |
| CN202350367U (en) | Heating system for absorbing terrestrial heat by utilizing heat pipes | |
| CN110986395B (en) | Method for optimizing outlet temperature of underground heat exchange system of deep well cementing filling body | |
| CN111721013B (en) | Deep mine hydrothermal type geothermal energy circulation and coal seam collaborative mining system | |
| CN109595834B (en) | Radial combined U-shaped geothermal heat development method | |
| CN208010325U (en) | A kind of underground multiloop heat exchange geothermal well |
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 |