CN212301385U - Device for detecting influence of spontaneous combustion, heat production and gas production characteristics of coal on gas concentration field - Google Patents
Device for detecting influence of spontaneous combustion, heat production and gas production characteristics of coal on gas concentration field Download PDFInfo
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- CN212301385U CN212301385U CN202021254279.3U CN202021254279U CN212301385U CN 212301385 U CN212301385 U CN 212301385U CN 202021254279 U CN202021254279 U CN 202021254279U CN 212301385 U CN212301385 U CN 212301385U
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Abstract
The utility model discloses a device for detecting the influence of the spontaneous combustion heat and gas production characteristics of coal on a gas concentration field, which comprises a simulation test box, a ventilation system, a heating device, a gas injection system, a temperature and gas acquisition system and an analysis host; the goaf scene can be truly restored and a simulation experiment can be carried out through the device; meanwhile, the influence of heating of gas coal in the goaf on the gas desorption speed can be simulated, the change rule of the original gas concentration field in the goaf under the action of spontaneous combustion oxidation gas generation after the coal is heated and promotion of gas analysis of two types of gas products is reflected in real time; in addition, the utility model obtains the gas concentration field distribution rule of the goaf under two working conditions of coal spontaneous combustion heat production gas production and coal spontaneous combustion gas production through simulation experiments; further indirectly obtaining the distribution rule of the gas concentration field of the goaf under the working condition that the coal is spontaneously combusted and only generates heat; therefore, data support can be provided for researching the influence of the synergistic relationship of the spontaneous combustion heat production and gas production characteristics of the coal on the gas concentration.
Description
Technical Field
The utility model relates to a detect device of gas characteristic influence to gas concentration field is produced in spontaneous combustion heat production of coal belongs to coal mine safety technical field.
Background
The coal industry is a powerful guarantee for the rapid development of national economy, shallow coal resources in China are nearly exhausted at present, and many coal mines begin to enter deep mining. Along with the increase of the mining depth, the risk of the composite disaster of the coal spontaneous combustion and the gas is continuously increased, the influence of the characteristic of the coal spontaneous combustion, heat generation and gas production on the distribution of a gas concentration field is researched, and the method plays an important role in preventing and controlling the composite disaster.
The existing device is mainly used for researching the influence of gas on the spontaneous combustion characteristic of coal, for example, a Chinese patent with the application number of 201510297866.8 provides a test bed for researching the characteristic of the spontaneous combustion generation index gas of the coal under different gas contents; also, as in the chinese patent with application No. 201610270069.5, the influence of the gas extraction conditions on the spontaneous combustion of the coal is studied by analyzing the coal oxidation temperature rise process under different gas extraction conditions, and the above-mentioned existing test apparatuses are all short of apparatuses for studying the influence of the spontaneous combustion characteristics of the coal on the gas.
At present, most scholars mainly study the influence of air intake, air leakage, extraction amount, coal spontaneous combustion index gas and the like on gas concentration, for example, in the aspect of studying the influence of the coal spontaneous combustion index gas on the gas, the existing experimental study finds that after the gas is mixed with a large amount of coal spontaneous combustion index gas, the upper limit range and the lower limit range of the explosion concentration can be greatly increased, so that the gas explosion is promoted. Although the research has achieved great results in disclosing the interaction between coal spontaneous combustion and gas, the influence of heat generation on the gas in the coal spontaneous combustion process is ignored, and no consideration is given to the synergistic relationship between the heat generation and the gas generation.
In conclusion, the influence of the synergistic relationship between the spontaneous combustion heat generation and the gas production characteristics of the coal on the gas concentration is not fully considered in the conventional device and research.
Disclosure of Invention
The problem to above-mentioned prior art exists, the utility model provides a detect device of gas property is produced to coal spontaneous combustion heat production to gas concentration field influence through collecting space area gas concentration field distribution rule under simulation coal spontaneous combustion heat production and the gas production circumstances and the collecting space area gas concentration field distribution rule under the simulation gas production circumstances to can provide data support for the influence of research coal spontaneous combustion heat production and gas production characteristic to gas concentration.
In order to realize the purpose, the utility model discloses a technical scheme is: a device for detecting the influence of the spontaneous combustion, heat production and gas production characteristics of coal on a gas concentration field comprises a simulation test box, a ventilation system, a heating device, a gas injection system, a temperature and gas acquisition system and an analysis host;
the simulation test box comprises a heat preservation box body, a coal face model, a goaf model, an air inlet lane model and a return air lane model, wherein the coal face model, the goaf model, the air inlet lane model and the return air lane model are all located in the heat preservation box body;
the ventilation system comprises a speed changer and a fan, the speed changer and the fan are both arranged outside the heat preservation box body, the fan is communicated with an air inlet of the speed changer through a pipeline, and an air outlet of the speed changer is communicated with the interior of the air inlet tunnel model through a pipeline;
the heating device comprises a temperature controller and an electric heating rod, the electric heating rod is positioned at the bottom of the goaf model, a screen mesh placing frame is arranged above the electric heating rod, the electric heating rod is electrically connected with the temperature controller, and the temperature controller is electrically connected with the analysis host machine and used for heating the heat insulation box body;
the gas injection system comprises a first gas injection pipe, a second gas injection pipe, a third gas injection pipe, a three-way joint, a carbon monoxide gas cylinder and a methane gas cylinder, wherein a gas injection hole is formed in a bottom plate of the heat preservation box body beside the electric heating rod, the gas injection hole is connected with one port of the three-way joint through the first gas injection pipe, and the other two ports of the three-way joint are respectively connected with the carbon monoxide gas cylinder and the methane gas cylinder through the second gas injection pipe and the third gas injection pipe; the first gas injection pipe is provided with a first pressure gauge, a rotor flow meter and a gas flow regulating valve; the second gas injection pipe is provided with a first needle valve and a second pressure gauge; a second needle valve and a third pressure gauge are arranged on the third gas injection pipe;
the temperature and gas acquisition system comprises a monitoring device and a gas chromatograph, wherein the monitoring device consists of a plurality of layers of monitoring nets, and the plurality of layers of monitoring nets are arranged in the goaf model and are parallel to each other; every layer of monitoring net is set up side by a plurality of gas acquisition pipes equidistant and constitutes, all sets up a plurality of equidistant distribution's gas sampling hole on every gas acquisition pipe, and every gas sampling hole department all is equipped with gas sensor and temperature sensor, and each gas sensor and each temperature sensor all are connected with the analysis host computer electricity through the data line, and each gas acquisition pipe all is connected with gas chromatograph, and gas chromatograph is connected with the analysis host computer electricity.
Further, the number of the electric heating rods is two, and the gas injection hole is formed between the two electric heating rods. Set up two heating rods and can be more even to the coal sample heating, improve the experiment degree of accuracy.
Further, the gas injection hole is of a rotary type air hole structure. By adopting the structure, the gas injection hole can be conveniently opened and closed.
Further, the fan is a stepless speed change fan. By adopting the structure, the smooth adjustment of wind power is ensured when the fan adjusts the speed.
Compared with the prior art, the utility model adopts the combination of the simulation test box, the ventilation system, the heating device, the gas injection system, the temperature and gas collection system and the analysis host, so that the goaf scene can be truly restored and the simulation experiment can be carried out; meanwhile, the influence of heating of gas coal in the goaf on the gas desorption speed can be simulated, the change rule of the original gas concentration field in the goaf under the action of spontaneous combustion oxidation gas generation after the coal is heated and promotion of gas analysis of two types of gas products is reflected in real time; the utility model can obtain the gas concentration field distribution rule of the goaf under two working conditions of coal spontaneous combustion heat production gas production and coal spontaneous combustion gas production through simulation experiments; further indirectly obtaining the distribution rule of the gas concentration field of the goaf under the working condition that the coal is spontaneously combusted and only generates heat; therefore, data support can be provided for researching the influence of the synergistic relationship of the spontaneous combustion heat production and gas production characteristics of the coal on the gas concentration. If need in addition the utility model discloses can also be through adjusting the distribution amount of wind in the air intake lane, and then study the influence that outside ventilation system changes the gas concentration field distribution in to the collecting space area.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural diagram of the inside of a simulation test chamber according to the present invention;
FIG. 3 is a schematic diagram of the coordinates inside a simulation test chamber in a two-dimensional coordinate system;
FIG. 4 is a gas concentration field distribution diagram of the first layer of monitoring net under the working condition of simulating spontaneous combustion, heat generation and gas production of coal;
FIG. 5 is a gas concentration field distribution diagram of the second layer of monitoring net under the working condition of simulating spontaneous combustion, heat generation and gas production of coal;
FIG. 6 is a gas concentration field distribution diagram of the third layer of monitoring net under the working condition of simulating spontaneous combustion, heat generation and gas production of coal;
FIG. 7 is a gas concentration field distribution diagram of the first layer of monitoring net under the working condition of simulating spontaneous combustion of coal and only producing gas;
FIG. 8 is a gas concentration field distribution diagram of the second layer of monitoring net under the working condition of simulating spontaneous combustion of coal and only producing gas;
FIG. 9 is a gas concentration field distribution diagram of the third layer of monitoring net under the working condition of simulating spontaneous combustion of coal and only generating gas;
FIG. 10 is a gas concentration field distribution diagram of the first monitoring net layer under the working condition of coal spontaneous combustion and only heat generation according to calculation of the utility model;
FIG. 11 is a gas concentration field distribution diagram of the second layer monitoring net under the working condition of coal spontaneous combustion and heat generation only calculated by the utility model;
FIG. 12 is a gas concentration field distribution diagram of the third layer of monitoring net under the working condition of coal spontaneous combustion and heat generation.
In the figure: 1. the device comprises a heat preservation box body, 2, a coal face model, 3, an air inlet lane model, 4, an air return lane model, 5, a goaf model, 6, a fan, 7, a transmission, 8, an electric heating rod, 9, a screen placing rack, 10, a temperature controller, 11, a temperature sensor, 12, a monitoring device, 13, a gas sampling hole, 14, a gas chromatograph, 15, a gas injection hole, 16, a first pressure gauge, 17, a rotor flow meter, 18, a gas flow regulating valve, 19, a three-way joint, 20, a first needle valve, 21, a second pressure gauge, 22, a carbon monoxide gas cylinder, 23, a second needle valve, 24, a third pressure gauge, 25, a methane gas cylinder, 26, an analysis host, 27 and a gas sensor.
Detailed Description
The present invention will be further explained below.
As shown in fig. 1 and 2, a device for detecting the influence of the spontaneous combustion, heat generation and gas production characteristics of coal on a gas concentration field comprises a simulation test chamber, a ventilation system, a heating device, a gas injection system, a temperature and gas acquisition system and an analysis host;
the simulation test box comprises a heat preservation box body 1, a coal face model 2, a goaf model 5, an air inlet lane model 3 and a return air lane model 4, wherein the coal face model 2, the goaf model 5, the air inlet lane model 3 and the return air lane model 4 are all positioned in the heat preservation box body 1, and the sizes (length, width and height) of the air inlet lane model 3 and the return air lane model 4 are 10cm multiplied by 4 cm; the size of the coal face model 2 is 90cm multiplied by 5cm multiplied by 4 cm; the size of the goaf model 5 is 120cm multiplied by 90cm multiplied by 60 cm; six surfaces of the rectangular goaf model 5 are made of acrylic plates with strong hardness and good transparency; the coal face model 2 is placed on one side of a bottom plate of the heat preservation box body 1, the goaf model 5 is placed between the coal face model 2 and the other side of the bottom plate of the heat preservation box body 1, the air inlet lane model 3 and the return air lane model 4 are respectively arranged at two ends of the coal face model 2, and the air inlet lane model 3 and the return air lane model 4 are parallel to each other;
the ventilation system comprises a speed changer 7 and a fan 6, the speed changer 7 and the fan 6 are both positioned outside the heat preservation box body 1, the fan 6 is communicated with an air inlet of the speed changer 7 through a pipeline, and an air outlet of the speed changer 7 is communicated with the interior of the air inlet tunnel model 3 through a pipeline;
the heating device comprises a temperature controller 10 and an electric heating rod 8, the electric heating rod 8 is positioned at the bottom of the goaf model 5, a screen mesh placing rack 9 is arranged above the electric heating rod 8, the electric heating rod 8 is electrically connected with the temperature controller 10, and the temperature controller 10 is electrically connected with an analysis host 26 and used for heating the interior of the heat preservation box body 1;
the gas injection system comprises a first gas injection pipe, a second gas injection pipe, a third gas injection pipe, a three-way joint 19, a carbon monoxide gas cylinder 22 and a methane gas cylinder 25, wherein a gas injection hole 15 is formed in the bottom plate of the heat preservation box body 1 beside the electric heating rod 8, the gas injection hole 15 is connected with one port of the three-way joint 19 through the first gas injection pipe, and the other two ports of the three-way joint 19 are respectively connected with the carbon monoxide gas cylinder 22 and the methane gas cylinder 25 through the second gas injection pipe and the third gas injection pipe; a first pressure gauge 16, a rotor flow meter 17 and a gas flow regulating valve 18 are arranged on the first gas injection pipe; a first needle valve 20 and a second pressure gauge 21 are arranged on the second gas injection pipe; a second needle valve 23 and a third pressure gauge 24 are arranged on the third gas injection pipe;
the temperature and gas acquisition system comprises a monitoring device 12 and a gas chromatograph 14, wherein the monitoring device 12 consists of three layers of monitoring nets, the three layers of monitoring nets are arranged in the goaf model 2 and are parallel to each other, namely a first layer of monitoring net, a second layer of monitoring net and a third layer of monitoring net, and the heights of the monitoring nets are 1cm, 8cm and 20cm respectively; each layer of monitoring net is formed by arranging seven gas collecting pipes in parallel at equal intervals, and the vertical distances between the monitoring net and the coal face model 2 are respectively 15cm, 30cm, 45cm, 60cm, 75cm, 90cm and 105 cm; eight gas sampling holes distributed at equal intervals are formed in each gas collecting pipe, the vertical distances between the gas sampling holes and the air inlet roadway model 3 are respectively 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm and 80cm, a gas sensor 27 and a temperature sensor 11 are arranged at each gas sampling hole, each gas sensor 27 and each temperature sensor 11 are electrically connected with the analysis host machine 26 through data lines, each gas collecting pipe is connected with the gas chromatograph 14, and the gas chromatograph 14 is electrically connected with the analysis host machine 26.
Further, the number of the electric heating rods 8 is two, and the gas injection hole is located between the two electric heating rods 8. Set up two heating rods 8 and can be more even to the coal sample heating, improve the experiment degree of accuracy.
Further, the gas injection hole is of a rotary type air hole structure. By adopting the structure, the gas injection hole can be conveniently opened and closed.
Further, the fan 6 is a stepless speed change fan. By adopting the structure, the smooth adjustment of wind power is ensured when the speed of the fan 6 is adjusted.
The basic principle of the utility model is that: the coal can not only release heat but also generate index gases (such as CO and CO) in the spontaneous combustion process2，C2H2Etc.) both of which have an influence on the gas concentration field in the goaf, the generated gas dilutes the gas concentration, the released heat can expand the gas in a certain area, thus showing that the concentration is reduced, and the gas in the goaf space can be transported due to the existence of the high-temperature point of coal spontaneous combustion. Comprehensively considering, the mathematical expression of the gas concentration influence factor can be obtained as follows:
in the formula:
-the concentration of gas in the gob,
Gindex-an indicative gas produced during spontaneous combustion of the coal,
Δ T-the heat released during spontaneous combustion of the coal.
The utility model discloses a concrete working process does:
A. before the experiment, correcting each temperature sensor, each gas sensor 27 and the gas chromatograph 14, crushing the coal blocks and screening particles with the particle size of 40-80 meshes after the correction is finished, taking 50g of crushed coal blocks as a coal sample, placing the coal sample on a screen placing frame 9, and then carrying out air tightness inspection on the whole device;
B. starting a fan 6, adjusting the working condition of the fan 6 to a preset experimental wind speed value of 1m/s through a speed changer 7, and injecting airflow into the air inlet tunnel model 3 according to the wind speed value; opening the second needle valve 23 and the gas flow regulating valve 18, injecting methane with a certain flow into the goaf model 5 from the methane gas cylinder 25 through the third gas injection pipe and the first gas injection pipe, observing the pressure value in the methane gas cylinder 25 in real time through the third pressure gauge 24, monitoring the methane flow injected into the goaf model 5 in real time by the rotameter 17, and waiting for the rotameter 17 to display that the flow of the passing methane reaches the preset value of 0.48m3When the methane is filled in the methane tank, the gas flow regulating valve 18 and the second needle valve 23 are closed, and the methane is stopped to be filled;
C. simulating the spontaneous combustion heat production gas production experiment of coal: firstly, setting the temperature to rise from 25 ℃, and setting the final temperature to 225 ℃; then the analysis host 26 starts to heat up the electric heating rod 8 through the temperature controller 10, the heating rate is controlled to be 1 ℃/min, in the heating process, the temperature sensor 11 and the gas sensor 27 at each gas sampling hole monitor the change of the temperature and the gas concentration in the goaf model 5 in real time, the temperature value monitored by each temperature sensor 11 in real time is averaged, when the temperature average value is heated by 5 ℃, each gas sampling pipe of the monitoring network collects a gas sample and injects the gas sample into the gas chromatograph 14 for gas component analysis, and the real-time monitoring value of the temperature and the gas concentration and the analysis result of each gas sample are input into the analysis host 26 for recording; when the average temperature value reaches 225 ℃, controlling the electric heating rod to stop heating, and the analysis host machine to arrange the data through Origin data processing software and draw a temperature field and gas concentration field distribution diagram in the goaf (only the gas concentration field distribution diagram is drawn in the embodiment), as shown in fig. 4 to 6; finally, the fan 6 is closed, residual gas in the goaf model 5 is pumped by an air pump for collection, and pumping is stopped until the value of the first pressure gauge 16 is 0, so that the current experiment is completed; as can be seen from fig. 4 to 6, the contour line of the first layer forms a completely isolated region near the position of the high temperature point (i.e. the position of the electric heating rod 8), and the contour line of the region of the second layer still fluctuates greatly until the third layer tends to be moderate, because the temperature distribution of the high temperature point in the vertical direction is smaller and smaller, and the influence on the gas migration is smaller and smaller.
D. Simulating coal spontaneous combustion and only producing gas experiment: sampling the residual gas collected in the step C, injecting the residual gas into a gas chromatograph 14 for component analysis, thereby obtaining the generation amount of the coal spontaneous combustion marker gas CO in the temperature rise process of the step C, and storing the generation amount as a comparison value in an analysis host 26; then steps A and B are repeated, after the steps A and B are completed, the gas flow regulating valve 18 and the first needle valve 20 are opened, the CO gas is filled into the goaf model 5 from the carbon monoxide gas cylinder 22 through the second gas injection pipe and the first gas injection pipe, the flow rate is regulated through the opening degree of the gas flow regulating valve 18 and the first needle valve 20, the CO flow filled into the goaf model 5 is monitored by the rotor flowmeter 17 in real time, meanwhile, in the CO gas filling process, gas samples are collected for multiple times through each gas sampling pipe of the monitoring network and are filled into the gas chromatograph 14 for gas component analysis, the analysis result of each sampling is input into the analysis host 26, wherein the analysis host 26 compares the generated quantity of CO obtained in each analysis result with a contrast value, when the generated quantity of CO obtained in the analysis result reaches the contrast value, the first needle valve 20 and the gas flow regulating valve 18 are immediately closed, the analysis host 26 finishes the data and draws a gas field concentration distribution diagram in the goaf through Origin data processing software, as shown in fig. 7 to 9; finally, the fan 6 is turned off to complete the current experiment; from fig. 7 to 9, it can be seen that the contour lines of the first layer are similar and are uniformly spaced, the contour lines start to fluctuate along with the height increase in the vertical direction, the line spacing tends to be nonuniform, and the analysis reason is that the index gas density is small, and the gas is gathered above the goaf after being released, so that the influence on the gas above the goaf is large.
E. Adjusting the heating rate of the electric heating rod 8, and repeating the steps A-C for multiple times to obtain a temperature field and gas concentration field distribution diagram in the goaf under different heating rates; therefore, the relation between different heating rates and the change of the gas concentration field of the goaf can be obtained.
In the experiment, the moving direction of the goaf model 5 is defined as the x direction, and the inclined direction is defined as the y direction; i.e. as shown in fig. 3.
Under the condition of knowing that the gas concentration field distribution rule of the goaf under two working conditions of coal spontaneous combustion heat production gas production and coal spontaneous combustion gas production only, processing the experimental data of the two according to the fact that only heat production is heat production gas production and only gas production, and finishing and drawing 10 to 12; from these three figures, the first layer forms a semi-isolated region near the high temperature point, and the gas concentration field distribution is gradually relaxed with the increase of the height in the vertical direction, that is, the gas concentration field distribution changes with the temperature gradient in the vertical direction.
Finally, the comprehensive analysis is carried out on the graphs from 4 to 12, the influence of gas generation on the distribution of a gas concentration field is small, and the concentration distribution begins to fluctuate along with the increase of the height; the heat generation has great influence on the distribution of the gas concentration field, and the concentration distribution of the gas concentration field gradually tends to be smooth along with the increase of the height; by organically combining the two, an isolated region appears near the high temperature point, as shown in fig. 4.
Claims (4)
1. A device for detecting the influence of the spontaneous combustion, heat generation and gas production characteristics of coal on a gas concentration field is characterized by comprising a simulation test box, a ventilation system, a heating device, a gas injection system, a temperature and gas acquisition system and an analysis host;
the simulation test box comprises a heat preservation box body, a coal face model, a goaf model, an air inlet lane model and a return air lane model, wherein the coal face model, the goaf model, the air inlet lane model and the return air lane model are all located in the heat preservation box body;
the ventilation system comprises a speed changer and a fan, the speed changer and the fan are both arranged outside the heat preservation box body, the fan is communicated with an air inlet of the speed changer through a pipeline, and an air outlet of the speed changer is communicated with the interior of the air inlet tunnel model through a pipeline;
the heating device comprises a temperature controller and an electric heating rod, the electric heating rod is positioned at the bottom of the goaf model, a screen mesh placing frame is arranged above the electric heating rod, the electric heating rod is electrically connected with the temperature controller, and the temperature controller is electrically connected with the analysis host machine and used for heating the heat insulation box body;
the gas injection system comprises a first gas injection pipe, a second gas injection pipe, a third gas injection pipe, a three-way joint, a carbon monoxide gas cylinder and a methane gas cylinder, wherein a gas injection hole is formed in a bottom plate of the heat preservation box body beside the electric heating rod, the gas injection hole is connected with one port of the three-way joint through the first gas injection pipe, and the other two ports of the three-way joint are respectively connected with the carbon monoxide gas cylinder and the methane gas cylinder through the second gas injection pipe and the third gas injection pipe; the first gas injection pipe is provided with a first pressure gauge, a rotor flow meter and a gas flow regulating valve; the second gas injection pipe is provided with a first needle valve and a second pressure gauge; a second needle valve and a third pressure gauge are arranged on the third gas injection pipe;
the temperature and gas acquisition system comprises a monitoring device and a gas chromatograph, wherein the monitoring device consists of a plurality of layers of monitoring nets, and the plurality of layers of monitoring nets are arranged in the goaf model and are parallel to each other; every layer of monitoring net is set up side by a plurality of gas acquisition pipes equidistant and constitutes, all sets up a plurality of equidistant distribution's gas sampling hole on every gas acquisition pipe, and every gas sampling hole department all is equipped with gas sensor and temperature sensor, and each gas sensor and each temperature sensor all are connected with the analysis host computer electricity through the data line, and each gas acquisition pipe all is connected with gas chromatograph, and gas chromatograph is connected with the analysis host computer electricity.
2. The device for detecting the influence of the spontaneous combustion heat and gas production characteristics of coal on the gas concentration field according to claim 1, wherein the number of the electric heating rods is two, and the gas injection hole is formed between the two electric heating rods.
3. The device for detecting the influence of the spontaneous combustion heat and gas production characteristics of coal on the gas concentration field according to claim 1, wherein the gas injection hole is of a rotary type air hole structure.
4. The device for detecting the influence of the spontaneous combustion, heat generation and gas production characteristics of coal on the gas concentration field according to claim 1, wherein the fan is a stepless speed change fan.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650242A (en) * | 2020-06-30 | 2020-09-11 | 湖南科技大学 | Device and method for detecting influence of spontaneous combustion heat and gas production characteristics of coal on gas concentration field |
| CN114441732A (en) * | 2021-08-10 | 2022-05-06 | 中国矿业大学 | Testing device and testing method for gas explosion caused by rock piezoelectric effect |
| CN116608003A (en) * | 2023-05-25 | 2023-08-18 | 中国矿业大学 | Mine coal and gas co-mining composite disaster simulation test system and method |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650242A (en) * | 2020-06-30 | 2020-09-11 | 湖南科技大学 | Device and method for detecting influence of spontaneous combustion heat and gas production characteristics of coal on gas concentration field |
| CN111650242B (en) * | 2020-06-30 | 2024-05-10 | 湖南科技大学 | Device and method for detecting influence of spontaneous combustion heat-producing gas-producing characteristics of coal on gas concentration field |
| CN114441732A (en) * | 2021-08-10 | 2022-05-06 | 中国矿业大学 | Testing device and testing method for gas explosion caused by rock piezoelectric effect |
| CN116608003A (en) * | 2023-05-25 | 2023-08-18 | 中国矿业大学 | Mine coal and gas co-mining composite disaster simulation test system and method |
| CN116608003B (en) * | 2023-05-25 | 2023-11-24 | 中国矿业大学 | Mine coal and gas co-mining composite disaster simulation test system and method |
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