CN114215604B - Underground test method for filling mining coal bed and filling body temperature - Google Patents
Underground test method for filling mining coal bed and filling body temperature Download PDFInfo
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- CN114215604B CN114215604B CN202111568407.0A CN202111568407A CN114215604B CN 114215604 B CN114215604 B CN 114215604B CN 202111568407 A CN202111568407 A CN 202111568407A CN 114215604 B CN114215604 B CN 114215604B
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- 239000003245 coal Substances 0.000 title claims abstract description 54
- 238000005065 mining Methods 0.000 title claims abstract description 23
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 230000036760 body temperature Effects 0.000 title abstract description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 80
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 40
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 239000000945 filler Substances 0.000 claims description 18
- 230000017525 heat dissipation Effects 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 7
- 239000003814 drug Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 230000002269 spontaneous effect Effects 0.000 abstract description 8
- 238000003795 desorption Methods 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 238000009529 body temperature measurement Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- 230000007774 longterm Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The underground test method for filling and mining coal bed and filling body temperature comprises the following steps: drilling a temperature measuring hole on the wall surface of the coal bed before the first filling; a data acquisition point comprising an ohmmeter and a computer is arranged in the air inlet crossheading; a platinum resistance thermometer is arranged in the temperature measuring hole; connecting a platinum resistance thermometer with an ohmmeter and configuring a connecting switch; connecting an ohmmeter with a computer; closing a switch to conduct a data transmission chain during temperature measurement; automatically processing and analyzing the data by a computer; after the first filling is finished, drilling a temperature measuring hole by referring to a hole distribution mode on the wall surface of the coal seam, and then sequentially finishing the installation of a platinum resistance thermometer, the connection of the platinum resistance thermometer and an ohmmeter, the connection of the ohmmeter and a computer and the temperature test; and by analogy, completing the temperature measurement process of the subsequent filling body. The invention can accurately test the temperature of the filling body, accurately judge the heat conduction direction, analyze the influence of filling in each stage on the temperature and analyze the influence of filling on gas permeation, adsorption and desorption, and avoid the problem of spontaneous combustion and ignition of gas and coal.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to an underground test method for filling and mining coal bed and filling body temperature.
Background
When the coal mine underground is subjected to working face layered filling mining, the problem of complex spontaneous combustion and ignition of gas and coal is often faced, but the current treatment technology for the problem of spontaneous combustion and ignition of gas and coal of filling mining coal beds is still immature, and systematic research is needed. In order to study the problem of spontaneous combustion and ignition of gas and coal in a filling and mining coal bed, the influence of the temperature change of the coal bed and the filling body on spontaneous combustion of the coal must be known, and the influence of the temperature change of the coal bed and the filling body on gas permeation, adsorption and desorption must be known. Therefore, it is imperative to design a downhole testing method for exploiting the temperature of the coal seam and the filling body, the method should be capable of accurately testing the temperature of the filling body to judge the heat conduction direction, and the method is used for avoiding the problems of spontaneous combustion and ignition of gas and coal by analyzing the influence of filling on the temperature and the influence of filling on gas permeation and adsorption and desorption in each stage and simultaneously meeting the requirement of long-term monitoring on the change of the filling body temperature.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the underground test method for the temperature of the filling mining coal bed and the filling body, which can accurately test the temperature of the filling body, realize the accurate judgment of the heat conduction direction, further analyze the influence of filling in each stage on the temperature and the influence of filling on gas permeation, adsorption and desorption so as to avoid the problems of spontaneous combustion and ignition of gas and coal, and simultaneously meet the requirement of long-term monitoring on the change of the filling body temperature.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a downhole testing method for filling and mining coal bed and filling body temperature comprises the following steps:
step one: before the first filling, determining the number and positions of the temperature measuring points on the wall surface of the coal seam, and marking each temperature measuring point;
step two: drilling temperature measuring holes at the temperature measuring mark by using a drilling machine to be vertical to the wall surface of the coal seam, wherein the hole depths of all the temperature measuring holes are kept consistent;
step three: arranging data acquisition points in the underground air inlet crossheading, wherein a plurality of ohmmeters and a computer are required to be prepared at the data acquisition points;
step four: inserting a platinum resistance thermometer into each temperature measuring hole, and leaving a lead joint of the platinum resistance thermometer outside the temperature measuring holes;
step five: an ohmmeter with the same number as the number of the temperature measuring points is selected, an ohmmeter is configured for each platinum resistance thermometer, the ohmmeter is connected with the platinum resistance thermometer, a wire is also required to be configured, one end of the wire is connected with a lead joint of the platinum resistance thermometer, and the other end of the wire is required to be connected with the ohmmeter through a switch;
step six: the connection of the rest platinum resistance thermometers and the ohm meter is completed by referring to the connection mode of the first platinum resistance thermometer and the first ohm meter;
step seven: after all the platinum resistance thermometers are connected with the ohmmeter, the ohmmeter is connected into a computer through a data line;
step eight: when the temperature test is needed, only the switches between all the platinum resistance thermometers and the ohm meters are closed to realize the communication of the data transmission chain, and at the moment, the computer automatically processes and analyzes the acquired data;
step nine: after the first filling is finished, determining the number and positions of the temperature measuring points on the wall surface of the first filling, and marking each temperature measuring point;
step ten: at the temperature measuring mark, drilling temperature measuring holes on the wall surface of the first filling body vertically by using a drilling machine, wherein the hole depths of all the temperature measuring holes are kept consistent;
step eleven: repeating the fourth step to the eighth step;
step twelve: and by analogy, drilling a temperature measuring hole on the wall surface of the new filling body after filling is finished once, and repeating the steps four to eight to finally realize underground test of the temperature of the filling mining coal bed and the filling body.
The platinum resistance thermometer is a platinum resistance thermometer with the model PT1000, and the resistance value of the PT1000 platinum resistance thermometer is 1000Ω at 0 ℃.
When the influence of filling at each stage on the temperature is analyzed by a computer, the heat flow speeds of different areas in the filling mining coal bed and the filling body need to be obtained, and the calculation formula is as follows: q=λ·s· (t i -t i+1 )/b i The method comprises the steps of carrying out a first treatment on the surface of the Wherein Q is the heat flow rate, lambda is the thermal conductivity of the filling body, S is the unit area, t i The temperature of the temperature measuring point on the wall surface of the coal bed or the previous filling body, t i+1 B, for the temperature of the temperature measuring point on the next filling body i The thickness of the filling body is the thickness of the filling body at the next time.
When the influence of the filler on heat dissipation is analyzed by a computer, the heat dissipation rate of the filler needs to be obtained, and the calculation formula is as follows: q (Q) Powder medicine ＝λ Empty space ·S·(t i -t Empty space ) The method comprises the steps of carrying out a first treatment on the surface of the In which Q Powder medicine Lambda is the heat dissipation rate Empty space Is the heat conductivity coefficient of air, S is the unit area, t i The temperature of the temperature measuring point on the wall surface of the coal bed or the previous filling body.
The invention has the beneficial effects that:
the underground test method for the temperature of the filling mining coal bed and the filling body can accurately test the temperature of the filling body, realize accurate judgment of the heat conduction direction, further analyze the influence of filling in each stage on the temperature and the influence of filling on gas permeation, adsorption and desorption, so as to avoid the problem of spontaneous combustion and ignition of gas and coal, and simultaneously meet the requirement of long-term monitoring on the change of the filling body temperature.
Drawings
FIG. 1 is a transverse cross-sectional view of a filling mined coal seam;
FIG. 2 is a longitudinal cross-sectional view of a mined-by-fill coal seam;
in the figure, 1-first temperature measuring point, 2-second temperature measuring point, 3-third temperature measuring point, 4-fourth temperature measuring point, 5-air inlet gate, 6-filler wall, 7-data acquisition point, 8-adhesive tape gate, 9-coal seam, 10-top plate, 11-bottom plate, 12-goaf, 13-first filler, 14-second filler, 15-third filler, 16-fourth filler and 17-fifth filler.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
A downhole testing method for filling and mining coal bed and filling body temperature comprises the following steps:
step one: before the first filling, determining the number and positions of the temperature measuring points on the wall surface of the coal seam, and marking each temperature measuring point;
in this embodiment, as shown in fig. 1, the number of the temperature measuring points is four, which are respectively marked as a first temperature measuring point 1, a second temperature measuring point 2, a third temperature measuring point 3 and a fourth temperature measuring point 4, wherein the first temperature measuring point 1, the second temperature measuring point 2 and the third temperature measuring point 3 are uniformly distributed at the bottom of the wall surface of the coal seam, the fourth temperature measuring point 4 is positioned at a position 1.7m right above the third temperature measuring point 3, the distance between the first temperature measuring point 1 and the second temperature measuring point 2 and the distance between the second temperature measuring point 2 and the third temperature measuring point 3 are 55mm, and the wall surface distance between the first temperature measuring point 1 and the air inlet gateway 5 is 5m;
step two: drilling temperature measuring holes at the temperature measuring mark by using a drilling machine to be vertical to the wall surface of the coal seam, wherein the hole depths of all the temperature measuring holes are kept consistent;
step three: arranging data acquisition points in the underground air inlet crossheading, wherein a plurality of ohmmeters and a computer are required to be prepared at the data acquisition points;
step four: inserting a platinum resistance thermometer into each temperature measuring hole, and leaving a lead joint of the platinum resistance thermometer outside the temperature measuring holes;
step five: an ohmmeter with the same number as the number of the temperature measuring points is selected, an ohmmeter is configured for each platinum resistance thermometer, the ohmmeter is connected with the platinum resistance thermometer, a wire is also required to be configured, one end of the wire is connected with a lead joint of the platinum resistance thermometer, and the other end of the wire is required to be connected with the ohmmeter through a switch;
step six: the connection of the rest platinum resistance thermometers and the ohm meter is completed by referring to the connection mode of the first platinum resistance thermometer and the first ohm meter;
step seven: after all the platinum resistance thermometers are connected with the ohmmeter, the ohmmeter is connected into a computer through a data line;
step eight: when the temperature test is needed, only the switches between all the platinum resistance thermometers and the ohm meters are closed to realize the communication of the data transmission chain, and at the moment, the computer automatically processes and analyzes the acquired data;
in the embodiment, in the initial stage of the first filling, data is collected every 30 minutes, the data is continuously collected for 48 hours, when the internal temperature of the filling body tends to be stable, the data collection period is changed to be once every 24 hours, 7 groups of data are continuously collected every time, and each group of data is separated by 30 minutes;
step nine: after the first filling is finished, determining the number and positions of the temperature measuring points on the wall surface of the first filling, and marking each temperature measuring point;
in this embodiment, the arrangement mode of the temperature measuring points on the wall surface of the first filler is the same as the arrangement mode of the temperature measuring points on the wall surface of the coal seam, and the four temperature measuring points on the wall surface of the first filler correspond to the four temperature measuring points on the wall surface of the coal seam one by one;
step ten: at the temperature measuring mark, drilling temperature measuring holes on the wall surface of the first filling body vertically by using a drilling machine, wherein the hole depths of all the temperature measuring holes are kept consistent;
step eleven: repeating the fourth step to the eighth step;
step twelve: and by analogy, drilling a temperature measuring hole on the wall surface of the new filling body after filling is finished once, and repeating the steps four to eight to finally realize underground test of the temperature of the filling mining coal bed and the filling body. In this embodiment, as shown in fig. 2, five filling operations are taken as an example.
The platinum resistance thermometer is a platinum resistance thermometer with the model PT1000, and the resistance value of the PT1000 platinum resistance thermometer is 1000Ω at 0 ℃.
At each stage of analysis by computerWhen the filling influences the temperature, the heat flow speeds of different areas in the filling mining coal bed and the filling body need to be obtained, and the calculation formula is as follows: q=λ·s· (t i -t i+1 )/b i The method comprises the steps of carrying out a first treatment on the surface of the Wherein Q is the heat flow rate, lambda is the thermal conductivity of the filling body, S is the unit area, t i The temperature of the temperature measuring point on the wall surface of the coal bed or the previous filling body, t i+1 B, for the temperature of the temperature measuring point on the next filling body i The thickness of the filling body is the thickness of the filling body at the next time.
Specifically, the temperature at two ends of the previous filling body can be influenced by the filling of the next filling body, so that the calculation result can be ensured to be more accurate through real-time temperature measurement. The temperature influence of different stages of filling mining on each filling layer and the surface of the coal seam can be totally analyzed after data are summarized by calculating the heat flow speed in each layer of filling body, wherein the influence of each stage of filling body on the temperature specifically comprises the heat release of the filling body and the influence of the last filling body on the last filling body.
When the influence of the filler on heat dissipation is analyzed by a computer, the heat dissipation rate of the filler needs to be obtained, and the calculation formula is as follows: q (Q) Powder medicine ＝λ Empty space ·S·(t i -t Empty space ) The method comprises the steps of carrying out a first treatment on the surface of the In which Q Powder medicine Lambda is the heat dissipation rate Empty space Is the heat conductivity coefficient of air, S is the unit area, t i The temperature of the temperature measuring point on the wall surface of the coal bed or the previous filling body.
Specifically, the heat flow rate Q and the heat dissipation rate Q at the same time are compared Powder medicine The effect of the filler on heat dissipation can be analyzed.
The embodiments are not intended to limit the scope of the invention, but rather are intended to cover all equivalent implementations or modifications that can be made without departing from the scope of the invention.
Claims (4)
1. The underground test method for the temperature of the filling mining coal bed and the filling body is characterized by comprising the following steps of:
step one: before the first filling, determining the number and positions of the temperature measuring points on the wall surface of the coal seam, and marking each temperature measuring point;
step two: drilling temperature measuring holes at the temperature measuring mark by using a drilling machine to be vertical to the wall surface of the coal seam, wherein the hole depths of all the temperature measuring holes are kept consistent;
step three: arranging data acquisition points in the underground air inlet crossheading, wherein a plurality of ohmmeters and a computer are required to be prepared at the data acquisition points;
step four: inserting a platinum resistance thermometer into each temperature measuring hole, and leaving a lead joint of the platinum resistance thermometer outside the temperature measuring holes;
step five: an ohmmeter with the same number as the number of the temperature measuring points is selected, an ohmmeter is configured for each platinum resistance thermometer, the ohmmeter is connected with the platinum resistance thermometer, a wire is also required to be configured, one end of the wire is connected with a lead joint of the platinum resistance thermometer, and the other end of the wire is required to be connected with the ohmmeter through a switch;
step six: the connection of the rest platinum resistance thermometers and the ohm meter is completed by referring to the connection mode of the first platinum resistance thermometer and the first ohm meter;
step seven: after all the platinum resistance thermometers are connected with the ohmmeter, the ohmmeter is connected into a computer through a data line;
step eight: when the temperature test is needed, only the switches between all the platinum resistance thermometers and the ohm meters are closed to realize the communication of the data transmission chain, and at the moment, the computer automatically processes and analyzes the acquired data;
step nine: after the first filling is finished, determining the number and positions of the temperature measuring points on the wall surface of the first filling, and marking each temperature measuring point;
step ten: at the temperature measuring mark, drilling temperature measuring holes on the wall surface of the first filling body vertically by using a drilling machine, wherein the hole depths of all the temperature measuring holes are kept consistent;
step eleven: repeating the fourth step to the eighth step;
step twelve: and by analogy, drilling a temperature measuring hole on the wall surface of the new filling body after filling is finished once, and repeating the steps four to eight to finally realize underground test of the temperature of the filling mining coal bed and the filling body.
2. The downhole testing method for filling and mining coal seam and filler temperature according to claim 1, wherein: the platinum resistance thermometer is a platinum resistance thermometer with the model PT1000, and the resistance value of the PT1000 platinum resistance thermometer is 1000Ω at 0 ℃.
3. The downhole testing method for filling and mining coal seam and filler temperature according to claim 1, wherein: when the influence of filling at each stage on the temperature is analyzed by a computer, the heat flow speeds of different areas in the filling mining coal bed and the filling body need to be obtained, and the calculation formula is as follows: q=λ·s· (t i -t i+1 )/b i The method comprises the steps of carrying out a first treatment on the surface of the Wherein Q is the heat flow rate, lambda is the thermal conductivity of the filling body, S is the unit area, t i The temperature of the temperature measuring point on the wall surface of the coal bed or the previous filling body, t i+1 B, for the temperature of the temperature measuring point on the next filling body i The thickness of the filling body is the thickness of the filling body at the next time.
4. The downhole testing method for filling and mining coal seam and filler temperature according to claim 1, wherein: when the influence of the filler on heat dissipation is analyzed by a computer, the heat dissipation rate of the filler needs to be obtained, and the calculation formula is as follows: q (Q) Powder medicine ＝λ Empty space ·S·(t i -t Empty space ) The method comprises the steps of carrying out a first treatment on the surface of the In which Q Powder medicine Lambda is the heat dissipation rate Empty space Is the heat conductivity coefficient of air, S is the unit area, t i The temperature of the temperature measuring point on the wall surface of the coal bed or the previous filling body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111568407.0A CN114215604B (en) | 2021-12-21 | 2021-12-21 | Underground test method for filling mining coal bed and filling body temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111568407.0A CN114215604B (en) | 2021-12-21 | 2021-12-21 | Underground test method for filling mining coal bed and filling body temperature |
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| CN114215604A CN114215604A (en) | 2022-03-22 |
| CN114215604B true CN114215604B (en) | 2024-02-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209501A (en) * | 2018-10-18 | 2019-01-15 | 北京科技大学 | A kind of Underground filler Temperature Distribution formula monitoring system |
| WO2020119177A1 (en) * | 2018-12-12 | 2020-06-18 | 中国矿业大学 | Wall continuous mining and continuous filling water-preserved coal mining method, and water resource migration monitoring and water disaster early warning method |
| CN113586153A (en) * | 2021-08-04 | 2021-11-02 | 煤炭科学研究总院 | Method and device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction |
-
2021
- 2021-12-21 CN CN202111568407.0A patent/CN114215604B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209501A (en) * | 2018-10-18 | 2019-01-15 | 北京科技大学 | A kind of Underground filler Temperature Distribution formula monitoring system |
| WO2020119177A1 (en) * | 2018-12-12 | 2020-06-18 | 中国矿业大学 | Wall continuous mining and continuous filling water-preserved coal mining method, and water resource migration monitoring and water disaster early warning method |
| CN113586153A (en) * | 2021-08-04 | 2021-11-02 | 煤炭科学研究总院 | Method and device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction |
Non-Patent Citations (3)
| Title |
|---|
| 厚煤层高瓦斯矿井高效充填井下钻孔布置;杜学领;杨宝贵;;煤矿开采;20131215(第06期);全文 * |
| 煤层温度和应力梯度变化对煤层瓦斯压力计算的影响;贺建民, 王宏图, 鲜学福, 尹光志;重庆大学学报(自然科学版);19990930(第05期);全文 * |
| 胶结充填体水化温度场特征及对煤自燃特性的影响;刘鹏亮;;煤炭科学技术;20171115(第11期);全文 * |
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