CN217632396U - Water injection preheating drilling coal seam temperature field simulation experiment device - Google Patents
Water injection preheating drilling coal seam temperature field simulation experiment device Download PDFInfo
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- CN217632396U CN217632396U CN202220814415.2U CN202220814415U CN217632396U CN 217632396 U CN217632396 U CN 217632396U CN 202220814415 U CN202220814415 U CN 202220814415U CN 217632396 U CN217632396 U CN 217632396U
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Abstract
The utility model provides a drilling coal seam temperature field simulation experiment device is preheated in water injection, include: the system comprises a simulated environment experiment box, a coal seam simulation sample, a coal seam water injection preheating device and a thermistor; the simulated environment experiment box is used for simulating the geological condition and the ventilation condition of the actual on-site tunneling working face; the coal seam simulation sample is used for simulating a coal seam; the coal seam water injection preheating device is used for providing hot water; the thermistor is used for measuring the temperature of the coal seam simulation sample; the coal simulation sample is arranged in the simulation environment experiment box, a coal bed hot water injection hole and a temperature monitoring hole are drilled in the coal bed simulation sample, the coal bed hot water injection hole is connected with the coal bed preheating device and used for injecting hot water into the coal mine simulation sample, and the thermistor is arranged in the temperature monitoring hole and used for measuring the temperature change of the coal bed simulation sample. The experimental conditions can be simplified, the experimental period is shortened, and the defects of field test are overcome.
Description
Technical Field
The utility model belongs to the technical field of the experiment simulation, especially, relate to a drilling coal seam temperature field simulation experiment device is preheated in water injection.
Background
Most coal seams belong to coal seams with high gas, low gas permeability and difficult drainage, coal seam gas must be extracted to ensure safe production, and when gas is pre-extracted from a low-permeability coal seam, the quality of the gas extraction effect of the non-relief coal seam mainly depends on the permeability of the coal seam. The gas extraction for solving the problem of low-permeability coal seams becomes a key link for ensuring the safe production of coal mines and improving the production efficiency of the coal mines. The coal bed gas heat injection exploitation is the application and development of a heat injection method in the field of coal mine gas extraction, and is an environment-friendly, energy-saving and high-efficiency method for improving the permeability of a coal bed. When the thermal stress is greater than the ultimate strength of the coal body, the thermal fracture phenomenon occurs, the thermal fracture can change the microstructure of the rock body, not only can the original fractures in the rock body be elongated, but also a large number of new fractures can be formed, and therefore the permeability is improved. Due to the fact that underground environment conditions are severe, a coal bed temperature field is affected by factors such as working face geological conditions and ventilation conditions, and the fact that the temperature change rule inside the coal bed is measured in an actual measuring mode on site becomes extremely difficult.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a drilling coal seam temperature field simulation experiment device is preheated in water injection to solve the technical problem that the inside temperature variation law of coal seam temperature field that exists measures comparatively difficultly among the prior art.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
the utility model provides a drilling coal seam temperature field simulation experiment device is preheated in water injection, includes:
the system comprises a simulated environment experiment box, a coal seam simulation sample, a coal seam water injection preheating device and a thermistor;
the simulated environment experiment box is used for simulating the geological condition and the ventilation condition of the actual field tunneling working face;
the coal seam simulation sample is used for simulating a coal seam;
the coal seam water injection preheating device is used for providing hot water;
the thermistor is used for measuring the temperature of the coal bed simulation sample;
the coal simulation sample is arranged in the simulation environment experiment box, a coal bed hot water injection hole and a temperature monitoring hole are drilled in the coal bed simulation sample, the coal bed hot water injection hole is connected with the coal bed preheating device and used for injecting hot water into the coal mine simulation sample, and the thermistor is arranged in the temperature monitoring hole and used for measuring the temperature change of the coal bed simulation sample.
Further, the coal simulation sample comprises: coal seam sample and country rock sample, the country rock sample sets up in the both sides of coal seam sample, and the coal seam cross-section is rectangle or trapezoidal.
Further, the water injection preheating drilling coal seam temperature field simulation experiment device further comprises: and the heat preservation and insulation material is arranged on two sides of the simulated environment experiment box.
Further, be equipped with six coal seam hot water injection holes and three temperature monitoring hole on the coal simulation sample, six coal seam hot water injection holes include: two water injection holes and four apopores, go out the hand hole set up in the both sides of water injection hole.
Further, the water injection preheating drilling coal seam temperature field simulation experiment device further comprises: the small-size screen pipe that supports, small-size support screen pipe one end with the water injection jogged joint, the other end with coal seam water injection preheating device connects, is used for supporting the water injection hole is convenient for pour into hot water into the coal seam into.
Further, coal seam water injection preheating device includes: the water heating device comprises a hot water tank, a heating pipe, a water inlet valve, a water outlet valve and an overflow valve, wherein the water inlet valve, the water outlet valve and the overflow valve are respectively arranged on the hot water tank, and the heating pipe is arranged in the hot water tank.
Further, the water injection preheating drilling coal seam temperature field simulation experiment device further comprises: a simulated support screen, said simulated integrated screen for use in simulating a hot water injection layer, comprising: the sieve tube comprises a sieve tube body, a fixed ring, a movable ring and a plurality of supporting sheets, wherein the fixed ring is fixedly arranged on the peripheral outer surface of one side of the sieve tube body, the movable ring is movably arranged on the peripheral outer surface of the other side of the sieve tube body and can slide along the length direction of the sieve tube, one end of each supporting sheet is fixedly connected with the fixed ring, the other end of each supporting sheet is fixedly connected with the movable ring and can slide, expand and contract along with the movable ring, and an inner pipeline of the sieve tube body is used for supplying hot water to inject into a coal bed.
Further, the water preheating drilling coal seam temperature field simulation experiment device further comprises: and the data processing center is electrically connected with the thermistor through a lead, processes the temperature signal and converts the temperature signal into a digital signal.
Furthermore, the water injection preheating drilling coal seam temperature field simulation experiment device further comprises: and the monitoring terminal is electrically connected with the data center and is used for monitoring the temperature field change of the simulated coal bed sample after hot water injection in real time.
Compared with the prior art, water injection preheats drilling coal seam temperature field simulation experiment device have following advantage: the utility model discloses a water injection preheating drilling coal seam temperature field simulation experiment device, through setting up simulation environment experimental box, coal seam simulation sample, coal seam water injection preheating device and thermistor; the simulated environment experiment box is used for simulating the geological condition and the ventilation condition of the actual field tunneling working face; the coal seam simulation sample is used for simulating a coal seam; the coal seam water injection preheating device is used for providing hot water; the thermistor is used for measuring the temperature of the coal seam simulation sample; the coal simulation sample is arranged in the simulation environment experiment box, a coal bed hot water injection hole and a temperature monitoring hole are drilled in the coal bed simulation sample, the coal bed hot water injection hole is connected with the coal bed preheating device and used for injecting hot water into the coal mine simulation sample, and the thermistor is arranged in the temperature monitoring hole and used for measuring the temperature change of the coal bed simulation sample. The temperature change of the coal seam after preheating and water injection is monitored through the temperature sensor by injecting hot water into the coal seam punched in the simulation box, so that the change rule of the temperature field of the coal seam after preheating and water injection on the site is truly simulated. Meanwhile, the number, the interval and the inclination angle of the hot water injection holes can be changed, and the change sensitivity of the temperature field of the coal bed can be observed, so that the desorption flow mechanism and rule of coal matrix gas can be analyzed according to the monitoring result, the actual mine gas concentration can be predicted, and an economic and feasible suggestion can be provided for the rapid mine gas extraction measure. The experimental device can simplify experimental conditions, shorten experimental period, overcome the defects of field test and truly simulate the change rule of the temperature field after preheating and injecting water in the coal bed. The gas analysis characteristic rule under the condition of heat injection exploitation can be more finely monitored, so that key influence factors influencing gas desorption and diffusion are comprehensively analyzed. The method can provide theoretical data basis for the field application of the coal bed heat injection mining technology, and can be compared with the field data and verified mutually, so that support is provided for the popularization and application of the coal bed heat injection mining technology.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural view of a water injection preheating drilling coal seam temperature field simulation experiment device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a simulated support screen pipe in a water injection preheating drilling coal seam temperature field simulation experiment device according to an embodiment of the present invention.
Description of the reference numerals:
1-simulation environment experiment box; 2-heat preservation and insulation material; 3-simulating a coal bed sample; 4-small support sieve tube; 5-a coal seam water injection preheating device; 6-a hot water tank; 7-heating a tube; 8-hot water injection hole; 9-temperature monitoring hole; 10-a thermistor; 11-a data processing centre; 12-a monitoring terminal; 13-a screen body; 14-a fixed ring; 15-a movable ring; 16-moving ring.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is the embodiment of the utility model provides a water injection preheats drilling coal seam temperature field simulation experiment device's structural schematic diagram, see fig. 1, water injection preheats drilling coal seam temperature field simulation experiment device, include: the system comprises a simulated environment experiment box, a coal seam simulation sample, a coal seam water injection preheating device and a thermistor; the simulated environment experiment box is used for simulating the geological condition and the ventilation condition of the actual field tunneling working face; the coal seam simulation sample is used for simulating a coal seam; the coal seam water injection preheating device is used for providing hot water; the thermistor is used for measuring the temperature of the coal bed simulation sample; the coal simulation sample is arranged in the simulated environment experiment box, a coal seam hot water injection hole and a temperature monitoring hole are drilled in the coal seam simulation sample, the coal seam hot water injection hole is connected with the coal seam preheating device and used for injecting hot water into the coal mine simulation sample, and the thermistor is arranged in the temperature monitoring hole and used for measuring the temperature change of the coal seam simulation sample.
The coal bed simulation sample is a main structure of a simulation experiment device, is a main research object of a coal bed preheating water injection experiment, is used for simulating geological conditions, ventilation conditions and the like of an actual on-site tunneling working face, is not filled with gas due to the experiment simulation coal bed temperature field change, is used for reducing heat loss of the environment experiment box, is arranged on two sides of the experiment box, is provided with the same through holes on one side according to the drilling positions of the coal bed sample, consists of the coal bed sample and surrounding rock samples positioned on two sides of the coal bed sample, and comprises cement, sand stone, gypsum, lime and the like. The water injection hole is used as a hot water injection hole and a gas extraction drill hole in field application, and is only used as the hot water injection hole in a simulation experiment, and the hole depth, the hole spacing and the hole inclination angle of the water injection hole can be adjusted according to experiment requirements. And the temperature monitoring holes are positioned below the hot water injection holes, the hole depths, the hole intervals and the hole inclination angles are fixed values, and the temperature monitoring holes are internally used for placing thermistors and monitoring the temperature change of the coal bed.
Six coal seam hot water injection holes and three temperature monitoring holes are arranged on the surface of a coal seam simulation sample, the hole depth, the hole pitch and the hole inclination angle can be adjusted according to experimental requirements, the water inlet rule of the coal seam hot water injection holes is that water enters from one hole and water exits from two adjacent holes, and corresponding thermistors are arranged in the temperature monitoring holes 105 according to the water injection condition.
Coal seam water injection preheating device includes: the water heating device comprises a hot water tank, a heating pipe, a water inlet valve, a water outlet valve and an overflow valve, wherein the water inlet valve, the water outlet valve and the overflow valve are respectively arranged on the hot water tank, and the heating pipe is arranged in the hot water tank.
The coal seam water injection preheating device is characterized in that a heating pipe and a water outlet valve need to be closed before water storage, the water inlet valve and an overflow valve are opened for water storage, the water inlet valve is closed after water storage is finished, the heating pipe inside a water tank is started for water tank heating operation, a water tank temperature sensor is arranged in a hot water tank and is connected with a data processing center through a data transmission line, the water temperature change of the water tank is monitored through a monitoring terminal, when a water body is heated to 80 ℃, a temperature controller acts, the heating device is closed, a hole supporting sieve pipe is used for hole supporting operation, and then the water outlet valve of the water tank is opened for simulating coal seam sample preheating water injection operation.
The simulated integrated sieve tube is used for simulating a hot water injection layer sample and comprises the following components: the sieve tube comprises a sieve tube body, a fixed ring, a movable ring and a plurality of supporting sheets, wherein the fixed ring is fixedly arranged on the peripheral outer surface of one side of the sieve tube body, the movable ring is movably arranged on the peripheral outer surface of the other side of the sieve tube body and can slide along the length direction of the sieve tube, one end of each supporting sheet is fixedly connected with the fixed ring, the other end of each supporting sheet is fixedly connected with the movable ring and can slide, expand and contract along with the movable ring, and an inner pipeline of the sieve tube body is used for supplying hot water to inject into a coal bed. Fully plays the roles of supporting holes and preventing blockage.
The water injection preheating drilling coal seam temperature field simulation experiment device is used for truly simulating the temperature field change rule after the coal seam is preheated and injected with water on site by injecting hot water into the coal seam with holes punched in the simulation box and monitoring the temperature change of the coal seam after the coal seam is preheated and injected with water through the temperature sensor. Meanwhile, the number, the spacing and the inclination angle of the hot water injection holes can be changed, and the change sensitivity of the coal bed temperature field is observed, so that the desorption flow mechanism and the desorption flow rule of the coal matrix gas can be analyzed according to the monitoring result, the actual mine gas concentration is predicted, and an economic and feasible suggestion is provided for the rapid mine gas extraction measure.
The utility model discloses a water injection preheating drilling coal seam temperature field simulation experiment device, through setting up simulation environment experimental box, coal seam simulation sample, coal seam water injection preheating device and thermistor; the simulated environment experiment box is used for simulating the geological condition and the ventilation condition of the actual on-site tunneling working face; the coal seam simulation sample is used for simulating a coal seam; the coal seam water injection preheating device is used for providing hot water; the thermistor is used for measuring the temperature of the coal seam simulation sample; the coal simulation sample is arranged in the simulation environment experiment box, a coal bed hot water injection hole and a temperature monitoring hole are drilled in the coal bed simulation sample, the coal bed hot water injection hole is connected with the coal bed preheating device and used for injecting hot water into the coal mine simulation sample, and the thermistor is arranged in the temperature monitoring hole and used for measuring the temperature change of the coal bed simulation sample. The temperature change of the coal seam after preheating and water injection is monitored through the temperature sensor by injecting hot water into the perforated coal seam in the simulation box, so that the change rule of the temperature field of the coal seam after preheating and water injection on site is truly simulated. Meanwhile, the number, the interval and the inclination angle of the hot water injection holes can be changed, and the change sensitivity of the temperature field of the coal bed can be observed, so that the desorption flow mechanism and rule of coal matrix gas can be analyzed according to the monitoring result, the actual mine gas concentration can be predicted, and an economic and feasible suggestion can be provided for the rapid mine gas extraction measure. The experimental device can simplify experimental conditions, shorten experimental period, overcome the defects of field test and truly simulate the change rule of the temperature field after preheating and injecting water in the coal bed. The gas analysis characteristic rule under the condition of heat injection exploitation can be more finely monitored, so that key influence factors influencing gas desorption and diffusion are comprehensively analyzed. The method can provide theoretical data basis for the field application of the coal bed heat injection mining technology, and can be compared and verified with the field data, so that support is provided for the popularization and application of the coal bed heat injection mining technology.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a drilling coal seam temperature field simulation experiment device is preheated in water injection which characterized in that includes: the system comprises a simulated environment experiment box, a coal seam simulation sample, a coal seam water injection preheating device and a thermistor;
the simulated environment experiment box is used for simulating the geological condition and the ventilation condition of the actual on-site tunneling working face;
the coal seam simulation sample is used for simulating a coal seam;
the coal seam water injection preheating device is used for providing hot water;
the thermistor is used for measuring the temperature of the coal bed simulation sample;
the coal seam simulation sample is arranged in the simulation environment experiment box, a coal seam hot water injection hole and a temperature monitoring hole are drilled in the coal seam simulation sample, the coal seam hot water injection hole is connected with the coal seam hot water injection preheating device and used for injecting hot water into the coal seam simulation sample, and the thermistor is arranged in the temperature monitoring hole and used for measuring the temperature change of the coal seam simulation sample.
2. The water injection preheating drilling coal seam temperature field simulation experiment device as claimed in claim 1, wherein the coal seam simulation sample comprises: coal seam sample and country rock sample, the country rock sample sets up in the both sides of coal seam sample, and the coal seam cross-section is rectangle or trapezoidal.
3. The water injection preheating drilling coal seam temperature field simulation experiment device according to claim 1, further comprising: and the heat preservation and insulation material is arranged on two sides of the simulated environment experiment box.
4. The water injection preheating drilling coal seam temperature field simulation experiment device as claimed in claim 1, wherein six coal seam hot water injection holes and three temperature monitoring holes are arranged on the coal seam simulation sample, and the six coal seam hot water injection holes comprise: two water injection holes and four apopores, the apopore set up in the both sides of water injection hole.
5. The simulated experiment device for the temperature field of the coal seam with the water injection preheating drilled hole as claimed in claim 4, wherein the simulated experiment device for the temperature field of the coal seam with the water injection preheating drilled hole further comprises: the small-size screen pipe that supports, small-size screen pipe one end with the water injection jogged joint, the other end with coal seam water injection preheating device connects for support the water injection hole is convenient for pour into hot water into to the coal seam.
6. The simulated experiment device for the temperature field of the coal seam with the water injection preheating drilled hole as claimed in claim 1, wherein the coal seam water injection preheating device comprises: the hot water tank, the heating pipe, the water inlet valve, the water outlet valve and the overflow valve are arranged on the hot water tank respectively, and the heating pipe is arranged in the hot water tank.
7. The water injection preheating drilling coal seam temperature field simulation experiment device according to claim 1, further comprising: a simulated support screen, said simulated integral screen for use in simulating a hot water injection layer, comprising: the sieve tube comprises a sieve tube body, a fixed ring, a movable ring and a plurality of supporting sheets, wherein the fixed ring is fixedly arranged on the peripheral outer surface of one side of the sieve tube body, the movable ring is movably arranged on the peripheral outer surface of the other side of the sieve tube body and can slide along the length direction of the sieve tube, one end of each supporting sheet is fixedly connected with the fixed ring, the other end of each supporting sheet is fixedly connected with the movable ring and can slide, expand and contract along with the movable ring, and an inner pipeline of the sieve tube body is used for supplying hot water to inject into a coal bed.
8. The simulated experiment device for the temperature field of the water injection preheating drilled coal seam as claimed in claim 1, wherein the simulated experiment device for the temperature field of the water injection preheating drilled coal seam further comprises: and the data processing center is electrically connected with the thermistor through a lead, processes the temperature signal and converts the temperature signal into a digital signal.
9. The simulated experiment device for the temperature field of the coal seam with the water injection preheating drilled hole as claimed in claim 8, wherein the simulated experiment device for the temperature field of the coal seam with the water injection preheating drilled hole further comprises: and the monitoring terminal is electrically connected with the data processing center and is used for monitoring the temperature field change of the simulated coal bed sample after hot water injection in real time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220814415.2U CN217632396U (en) | 2022-04-08 | 2022-04-08 | Water injection preheating drilling coal seam temperature field simulation experiment device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220814415.2U CN217632396U (en) | 2022-04-08 | 2022-04-08 | Water injection preheating drilling coal seam temperature field simulation experiment device |
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| CN217632396U true CN217632396U (en) | 2022-10-21 |
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| CN202220814415.2U Active CN217632396U (en) | 2022-04-08 | 2022-04-08 | Water injection preheating drilling coal seam temperature field simulation experiment device |
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- 2022-04-08 CN CN202220814415.2U patent/CN217632396U/en active Active
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