阅读说明：本技术 Mts用静载荷煤自燃特性参数检测实验装置及检测方法 (Static load coal spontaneous combustion characteristic parameter detection experimental device and detection method for MTS ) 是由 翟小伟 张羽琛 任立峰 宋波波 张铎 刘昌菊 艾柯宇 罗金雷 于 2021-04-25 设计创作，主要内容包括：本发明公开了一种MTS用静载荷煤自燃特性参数检测实验装置,包括盛煤罐筒和通过活塞压头作用于盛煤罐筒的MTS液压系统,活塞压头与盛煤罐筒的内壁滑动配合,且活塞压头与盛煤罐筒上均开设有通孔,通孔与温度检测系统或气体采集系统连接；本发明还公开了一种利用该装置的检测方法,包括以下步骤：一、检查装置；二、在盛煤罐筒中装填破碎煤体,然后将通孔与温度检测系统或气体采集系统连接；三、启动MTS液压系统带动活塞压头对破碎煤体施加静载荷；四、获得煤体的温度参数或者气体组成与浓度。本发明设置MTS液压系统对破碎煤体施加静载荷准确模拟了深部煤矿环境,提高了检测结果的准确性；本发明的检测方法简单,灵活方便。(The invention discloses a static load coal spontaneous combustion characteristic parameter detection experimental device for MTS (methanol to olefins), which comprises a coal containing tank cylinder and an MTS (methanol to olefins) hydraulic system acting on the coal containing tank cylinder through a piston pressure head, wherein the piston pressure head is in sliding fit with the inner wall of the coal containing tank cylinder, through holes are formed in the piston pressure head and the coal containing tank cylinder, and the through holes are connected with a temperature detection system or a gas acquisition system; the invention also discloses a detection method using the device, which comprises the following steps: firstly, an inspection device; secondly, filling crushed coal bodies into the coal containing tank cylinder, and then connecting the through hole with a temperature detection system or a gas collection system; thirdly, starting the MTS hydraulic system to drive a piston pressure head to apply static load to the crushed coal body; and fourthly, obtaining the temperature parameter of the coal body or the gas composition and concentration. The MTS hydraulic system is arranged to apply static load to the broken coal body, so that the deep coal mine environment is accurately simulated, and the accuracy of a detection result is improved; the detection method is simple, flexible and convenient.)

The MTS is with dead load coal spontaneous combustion characteristic parameter detection experimental apparatus, its characterized in that, including flourishing coal jar section of thick bamboo (5) and MTS hydraulic system (1) that acts on flourishing coal jar section of thick bamboo (5) through piston pressure head (2), flourishing coal jar section of thick bamboo (5) is integrative metal module with piston pressure head (2), piston pressure head (2) and the inner wall sliding fit of flourishing coal jar section of thick bamboo (5), and all seted up the through-hole on piston pressure head (2) and flourishing coal jar section of thick bamboo (5), the through-hole is connected with temperature detection system, perhaps the through-hole is connected with gas acquisition system.

2. The test device for detecting the spontaneous combustion characteristic parameters of the static-load coal for the MTS according to claim 1, wherein through holes are formed in the eccentric position of the bottom of the piston pressure head (2) and the center of the bottom of the coal containing tank barrel (5).

3. The experimental device for detecting the spontaneous combustion characteristic parameters of the dead load coal for the MTS as claimed in claim 2, wherein a first metal protective sleeve (6) is welded at a through hole at the eccentric position of the bottom of the piston pressure head (2), a second metal protective sleeve (9) is welded at a through hole at the center of the bottom of the coal containing tank barrel (5), and the bottom end of the through hole at the center of the bottom of the coal containing tank barrel (5) is connected with a first gas conveying pipe (10).

4. The experimental device for detecting the spontaneous combustion characteristic parameters of the coal with dead load for MTS according to claim 3, wherein the temperature detection system comprises a first thermocouple probe (7) installed in a first metal protective sleeve (6) and a second thermocouple probe (8) installed in a second metal protective sleeve (9), the first thermocouple probe (7) is connected with a first temperature polling instrument (11), and the second thermocouple probe (8) is connected with a second temperature polling instrument (12).

5. The test device for detecting the spontaneous combustion characteristic parameters of the static load coal for the MTS according to claim 1, wherein the gas collection system comprises a first gas pipe (10) connected with a through hole on the coal containing tank (5), the first gas pipe (10) penetrates out of the coal containing tank (5) and is connected with a second gas pipe (13), the second gas pipe (13) is communicated with a gas collecting tank (16), a gas suction pump (15) is arranged on a communicating pipeline, and a cut-off valve (14) is arranged on a pipeline close to the gas suction pump (15).

6. The test device for detecting the spontaneous combustion characteristic parameters of the coal under static load for MTS according to claim 1, it is characterized in that the MTS hydraulic system (1) comprises a base (1-3) for placing a coal containing tank barrel (5), supporting upright posts (1-2) are arranged at two ends of the base (1-3), a reaction plate (1-1) is fixedly arranged on the upper end surface of the supporting upright post (1-2), a cylinder body (1-4) is fixedly arranged on the lower end surface of the reaction plate (1-1), a piston rod (1-5) is connected in the cylinder body (1-4) in a sliding way, the lower end of the piston rod (1-5) is contacted with the piston pressure head (2), and the piston rod (1-5) is provided with displacement scales, and the MTS hydraulic system 1 further comprises a microcomputer control system (1-6) for controlling the cylinder body (1-4).

7. The test device for detecting the spontaneous combustion characteristic parameters of the static-load coal for the MTS according to claim 1, wherein a sealing ring (3) is arranged on the piston pressure head (2), and heat insulation layers are arranged on the bottom of the piston pressure head (2) and the outer surface of the coal containing tank barrel (5).

8. The detection method of the test device for detecting the spontaneous combustion characteristic parameters of the static load coal for MTS, which is disclosed by any one of claims 1 to 7, is characterized by comprising the following steps of:

step one, checking a static load coal spontaneous combustion characteristic parameter detection experimental device for MTS to ensure that the device is intact and has no fault;

secondly, placing a pre-crushed deep coal mine coal sample in a coal containing tank (5) to serve as a crushed coal body, and then connecting the through hole with a temperature detection system or connecting the through hole with a gas collection system;

step three, starting the MTS hydraulic system (1), and then adjusting the static load value through a microcomputer control system (1-6) to enable a piston rod (1-5) in a cylinder body (1-4) to stretch and retract and drive a piston pressure head (2) to act on the crushed coal body and apply the static load;

and step four, detecting and obtaining the spontaneous combustion characteristic of the temperature parameter of the coal body through a temperature detection system, or collecting the generated gas of the coal body through a gas collection system, and further detecting the composition and the concentration of the generated gas of the coal body to obtain the spontaneous combustion characteristic of the composition and the concentration of the generated gas of the coal body.

9. The method for detecting according to claim 8, wherein the process of connecting the through hole and the temperature detecting system in the second step is as follows: respectively fixedly installing a first thermocouple probe (7) in a first metal protective sleeve (6) and connecting the first thermocouple probe with a first temperature polling instrument (11) through an electric wire, and fixedly installing a second thermocouple probe (8) in a second metal protective sleeve (9) and connecting the second thermocouple probe with a second temperature polling instrument (12) through an electric wire arranged in a first gas conveying pipe (10) in a penetrating manner;

the detection process of the temperature detection system in the fourth step is as follows: and opening a first temperature polling instrument (11) and a second temperature polling instrument (12), and detecting, outputting and recording the temperature change of the top and the bottom in the crushed coal body under different static loads in real time through a first thermocouple probe (7) and a second thermocouple probe (8).

10. The method of claim 8, wherein the step two of connecting the through hole to the gas collection system comprises: a through hole at the bottom eccentric position of the piston pressure head (2) is plugged by a hexagonal screw, the upper end of the through hole at the bottom center of the coal containing cylinder (5) is covered by gauze, the lower end of the through hole at the bottom center of the coal containing cylinder (5) is connected with a first gas pipe (10), the first gas pipe (10) penetrates out of the coal containing cylinder (5) and is connected with a second gas pipe (13), an air suction pump (15) is installed on a communicating pipeline of the second gas pipe (13) and a gas collection cylinder (16), and a cut-off valve (14) is installed on a pipeline close to the air suction pump (15);

the process that the gas collection system collects the coal body to generate gas in the fourth step is as follows: and opening the cut-off valve (14) and starting the air pump (15) to enable the coal gas to enter the first air delivery pipe (10) through the through hole, then enter the air collection tank barrel (16) through the second air delivery pipe (13) to be collected and stored, and then further detecting the composition and concentration of the coal gas generated in the air collection tank barrel (16) to obtain the spontaneous combustion characteristics of the composition and concentration of the generated coal gas.

Technical Field

The invention belongs to the technical field of coal spontaneous combustion characteristic testing, and particularly relates to a static load coal spontaneous combustion characteristic parameter detection experimental device and a detection method for MTS.

Background

In the energy structure of China, coal always occupies most of the energy proportion. In recent years, the mining of coal resources has been gradually advanced to a deep part with the increase in energy consumption and mining intensity. The most prominent characteristic of deep mining is that the ground pressure is large and the ground temperature is high, the coal body is already under the action of dynamic load before mining and is in a high static stress or ground stress state, and meanwhile, in the process of excavating a chamber or constructing a roadway, rock burst and surrounding rock extrusion deformation are large, and the partition fracture phenomenon of the surrounding rock also occurs. Therefore, the coal body is easier to break after mining in the deep coal mining process, the coal spontaneous combustion environmental parameters are changed, and meanwhile, the heat dissipation efficiency, the energy consumption and the energy conversion of the broken coal body have a relationship under the influence of high stress, so that the natural oxidability of the broken coal body is influenced. Meanwhile, the influence of high ground temperature directly causes the initial temperature of the natural oxidation of the coal to be increased, shortens the natural ignition period of the coal and increases the risk of spontaneous combustion of the coal. Therefore, in the deep coal mining process, coal spontaneous combustion disasters are more serious, and the difficulty of prevention and treatment is correspondingly increased. The research on the coal spontaneous combustion characteristic under the action of the deep mining static load provides a basis for scientific decision of a system for monitoring, early warning and preventing spontaneous combustion in deep coal mining, and has important significance.

In the existing testing method and device, testing and research for testing the coal spontaneous combustion characteristic of a deep coal bed are rarely carried out; meanwhile, in the existing research methods, deep coal beds are researched mostly in theory or computer simulation, and experimental research is not carried out through experimental devices.

Disclosure of Invention

The invention aims to solve the technical problem of providing an experimental device for detecting spontaneous combustion characteristic parameters of static load coal for MTS (methanol to sulfur) aiming at the defects of the prior art. The device sets up MTS hydraulic system and applys static load through the piston pressure head to broken coal body, accurate simulation deep coal mine environment, combines to set up the through-hole of being connected with temperature detecting system or gaseous collection system, detects the temperature variation of coal body, the gaseous constitution of coal body production under the deep coal mine environmental simulation condition to acquire the spontaneous combustion characteristic of broken coal body in the deep coal mine, and improved the accuracy of testing result greatly.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: MTS is with static load coal spontaneous combustion characteristic parameter detection experimental apparatus, its characterized in that, including flourishing coal canning, act on the MTS hydraulic system who flourishes the canning through the piston pressure head, flourishing coal canning is an integrative metal module with the piston pressure head, the piston pressure head all has seted up the through-hole with the inner wall sliding fit who flourishes the canning, the through-hole is connected with temperature detection system, perhaps the through-hole is connected with gas acquisition system.

The static load coal spontaneous combustion characteristic parameter detection experimental device for the MTS is characterized in that through holes are formed in the eccentric position of the bottom of the piston pressure head and the center of the bottom of the coal containing tank barrel.

Foretell static load coal spontaneous combustion characteristic parameter detection experimental apparatus for MTS, its characterized in that, the through-hole department welding of the bottom eccentric position department of piston pressure head has first metal protection cover, the through-hole department welding of the bottom center department of flourishing coal canning section of thick bamboo has the second metal protection cover, and the through-hole bottom of the bottom center department of flourishing coal canning section of thick bamboo is connected with first gas-supply pipe.

The test device for detecting the spontaneous combustion characteristic parameters of the static load coal for the MTS is characterized in that the temperature detection system comprises a first thermocouple probe installed in a first metal protective sleeve and a second thermocouple probe installed in a second metal protective sleeve, the first thermocouple probe is connected with a first temperature polling instrument, and the second thermocouple probe is connected with a second temperature polling instrument.

The static load coal spontaneous combustion characteristic parameter detection experimental device for the MTS is characterized in that the gas collection system comprises a first gas pipe connected with a through hole in the coal containing tank, the first gas pipe penetrates out of the coal containing tank and is connected with a second gas pipe, the second gas pipe is communicated with the gas collecting tank, a gas suction pump is arranged on a communicating pipeline, and a cut-off valve is arranged on a pipeline close to the gas suction pump.

Foretell static load coal spontaneous combustion characteristic parameter detection experimental apparatus for MTS, a serial communication port, MTS hydraulic system is including laying the base of flourishing coal jar section of thick bamboo, the both ends of base are provided with the support post, and fixed mounting has the reaction plate on the up end of support post, fixed mounting has the cylinder body on the lower terminal surface of reaction plate, and sliding connection has the piston rod in the cylinder body, the lower extreme and the piston pressure head contact effect of piston rod, and be provided with the displacement scale on the piston rod, MTS hydraulic system still includes the microcomputer control system who controls the cylinder body.

The static load coal spontaneous combustion characteristic parameter detection experimental device for the MTS is characterized in that a sealing ring is arranged on the piston pressure head, and heat insulation layers are arranged on the bottom of the piston pressure head and the outer surface of the coal containing tank barrel.

In addition, the invention also provides a detection method of the experimental device for detecting the spontaneous combustion characteristic parameters of the static load coal for MTS, which is characterized by comprising the following steps:

step one, checking a static load coal spontaneous combustion characteristic parameter detection experimental device for MTS to ensure that the device is intact and has no fault;

secondly, placing a pre-crushed deep coal mine coal sample in a coal containing tank cylinder to serve as a crushed coal body, and then connecting the through hole with a temperature detection system or connecting the through hole with a gas collection system;

step three, starting the MTS hydraulic system, and adjusting the static load value through a microcomputer control system, so that a piston rod in a cylinder body stretches and contracts to drive a piston pressure head to act on the crushed coal body and apply the static load;

and step four, detecting and obtaining the spontaneous combustion characteristic of the temperature parameter of the coal body through a temperature detection system, or collecting the generated gas of the coal body through a gas collection system, and further detecting the composition and the concentration of the generated gas of the coal body to obtain the spontaneous combustion characteristic of the composition and the concentration of the generated gas of the coal body.

The method is characterized in that the process of connecting the through hole and the temperature detection system in the second step is as follows: respectively fixedly installing a first thermocouple probe in a first metal protective sleeve and connecting the first thermocouple probe with a first temperature polling instrument through an electric wire, and fixedly installing a second thermocouple probe in a second metal protective sleeve and connecting the second thermocouple probe with a second temperature polling instrument through an electric wire penetrating through a first gas pipe;

the detection process of the temperature detection system in the fourth step is as follows: and opening the first temperature polling instrument and the second temperature polling instrument, and detecting, outputting and recording the temperature change of the top and the bottom in the crushed coal body under different static loads in real time through the first thermocouple probe and the second thermocouple probe.

The method is characterized in that the process of connecting the through hole and the gas collection system in the second step is as follows: a through hole at the eccentric position of the bottom of the piston pressure head is plugged by a hexagonal screw, the upper end of the through hole at the center of the bottom of the coal containing cylinder is covered by gauze, the lower end of the through hole at the center of the bottom of the coal containing cylinder is connected with a first gas pipe, the first gas pipe penetrates out of the coal containing cylinder and is connected with a second gas pipe, an air suction pump is installed on a pipeline communicated with the second gas pipe and the gas collecting cylinder, and a cut-off valve is installed on a pipeline close to the air suction pump;

the process that the gas collection system collects the coal body to generate gas in the fourth step is as follows: and opening the block valve and starting the air pump to enable the coal gas to enter the first air delivery pipe through the through hole, then enter the air collection tank cylinder through the second air delivery pipe to be collected and stored, and then further detecting the composition and concentration of the coal gas generated in the air collection tank cylinder to obtain the spontaneous combustion characteristics of the composition and concentration of the generated coal gas.

Compared with the prior art, the invention has the following advantages:

1. the device is provided with the MTS hydraulic system which applies static load to the broken coal body through the piston pressure head, the deep coal mine environment is accurately simulated, the through hole connected with the temperature detection system or the gas collection system is combined, and the spontaneous combustion characteristic of the broken coal body in the deep coal mine is obtained by detecting the temperature change of the coal body and the composition of gas generated by the coal body under the deep coal mine environment simulation condition, so that the accuracy of the detection result is greatly improved, and a basis is provided for scientific decision of a system for monitoring, early warning and preventing spontaneous combustion of coal mining in the deep coal mine.

2. The device is connected with the temperature detection system or the gas collection system through the through hole, so that the device can be quickly connected and replaced according to the detection purpose, the test on different spontaneous combustion characteristic parameters of the coal body is respectively realized, the device is convenient and quick, the detection time is shortened, and the detection cost is reduced.

3. The main structure of the device is a movable coal containing tank cylinder and a piston pressure head, and the piston pressure head is movably connected with a piston rod of the MTS hydraulic system, is easy to assemble, disassemble and move, can be matched with different MTS hydraulic systems, and widens the application range and application places of the device.

4. The device has simple structure and novel and reasonable design.

5. The detection method is simple, flexible and convenient, and the obtained coal spontaneous combustion characteristic parameters are accurate, thereby providing a solid foundation for fire prevention and extinguishing of deep coal mines.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic view of a first structure of an experimental apparatus for detecting spontaneous combustion characteristic parameters of dead load coal for MTS according to the present invention.

Fig. 2 is an enlarged view of a point a in fig. 1.

FIG. 3 is a schematic diagram of a second structure of the experimental apparatus for detecting spontaneous combustion characteristic parameters of dead load coal for MTS of the present invention.

Fig. 4 is an enlarged view at B in fig. 3.

Description of reference numerals:

1-MTS hydraulic system; 1-reaction plate; 1-2-supporting upright posts;

1-3-base; 1-4-cylinder body; 1-5-piston rod;

1-6-microcomputer control system; 2-a piston ram; 3-sealing ring;

4-an insulating layer; 5-coal containing tank; 6-a first metal protective sheath;

7-a first thermocouple probe; 8-a second thermocouple probe; 9-a second metal protective sheath;

10-a first gas pipe; 11-a first temperature polling instrument; 12-a second temperature polling instrument;

13-a second gas line; 14-a shut-off valve; 15-an air pump;

16-gas collecting tank cylinder.

Detailed Description

The experimental apparatus for detecting spontaneous combustion characteristic parameters of coal under static load for MTS of the present invention is described in detail in example 1.

Example 1

As shown in fig. 1 to 4, the experimental apparatus for detecting the spontaneous combustion characteristic parameters of coal under the condition of static pressure bearing by the MTS in this embodiment includes a coal containing tank 5 and an MTS hydraulic system 1 acting on the coal containing tank 5 through a piston pressure head 2, the coal containing tank 5 and the piston pressure head 2 are all integrated metal modules, the piston pressure head 2 is in sliding fit with the inner wall of the coal containing tank 5, and the piston pressure head 2 and the coal containing tank 5 are both provided with through holes, which are connected with a temperature detection system or connected with a gas collection system.

The static load coal spontaneous combustion characteristic parameter detection experimental device for the MTS is provided with a coal containing tank cylinder 5 for containing broken coal and an MTS hydraulic system 1 acting on the coal containing tank cylinder 5 through a piston pressure head 2, the piston pressure head 2 is in sliding fit with the inner wall of the coal containing tank cylinder 5, so that the piston pressure head 2 freely slides up and down along the inner wall of the coal containing tank cylinder 5, static load is applied to the broken coal contained in the coal containing tank cylinder 5, the deep coal mine environment is accurately simulated, meanwhile, through holes are formed in the piston pressure head 2 and the coal containing tank cylinder 5 and are connected with a temperature detection system or a gas collection system, the spontaneous combustion characteristic of the broken coal in a deep coal mine is obtained by detecting the temperature change of the coal and the composition of gas generated by the coal under the condition of the deep coal mine environment simulation, the spontaneous combustion characteristic of the broken coal in the deep coal mine is obtained, and the detection of the spontaneous combustion characteristic of the broken coal in the deep coal mine through the experimental device is realized, and the accuracy of the detection result is greatly improved, and a basis is provided for scientific decision of a deep coal mining spontaneous combustion monitoring, early warning and preventing system.

Meanwhile, the coal-containing tank 5 and the piston pressure head 2 in the experimental device of the embodiment are all integrated metal modules. Through this setting, improved flourishing coal jar 5 and piston pressure head 2 and born, exerted the ability of static load, reduced the scattering of broken coal body temperature to and the coal body produces gaseous bad the revealing, guaranteed going on smoothly of experimental apparatus testing process.

In addition, the experimental device of this embodiment is through offering the through-hole on piston pressure head 2 and flourishing coal canning 5 to be connected through-hole and temperature detection system or with gas acquisition system respectively, in order to realize the detection to the different spontaneous combustion characteristic parameters of broken coal body in the deep colliery, nimble convenient, reasonable in design has simplified the experimental device structure, the cost is reduced.

Further, as shown in fig. 2 and 4, in this embodiment, through holes are formed in the bottom eccentric position of the piston ram 2 and the bottom center of the coal containing canister 5.

In the embodiment, through holes are respectively formed in the eccentric position of the bottom of the piston pressure head 2 and the center of the bottom of the coal containing tank cylinder 5, on one hand, temperature values of different positions of the crushed coal body in the coal containing tank cylinder 5 in the static load bearing process can be conveniently obtained, the spontaneous combustion characteristic of the coal body can be accurately reflected, or gas generated by converging different positions of the crushed coal body can be acquired, the gas composition and concentration generated by the coal body can be accurately obtained, and the accuracy of detection results of different spontaneous combustion characteristic parameters of the coal body can be further improved; on the other hand, set up the through-hole in piston pressure head 2's bottom eccentric position department, when more accurately acquireing broken coal body top spontaneous combustion characteristic parameter, effectively guaranteed piston pressure head 2 and exerted the homogeneity of static load to broken coal body, avoid the static load unbalance, further improved the accuracy of simulation deep coal mine environment, and set up the through-hole in the bottom center department of flourishing coal jar 5, gas in the broken coal body joins to screw thread trompil department and gathers under being favorable to the static load effect, and reduced the influence of exerting the process to the static load.

Furthermore, the through holes are all threaded openings. This be provided with and do benefit to the stability of being connected of improving through-hole and temperature detecting system or gaseous collection system.

Further, as shown in fig. 2 and 4, in this embodiment, a first metal protective sleeve 6 is welded at a through hole at the bottom eccentric position of the piston pressure head 2, a second metal protective sleeve 9 is welded at a through hole at the bottom center of the coal containing cylinder 5, and the bottom end of the through hole at the bottom center of the coal containing cylinder 5 is connected with a first gas pipe 10. Through corresponding welding first metal protection cover 6 and second metal protection cover 9 respectively in two through-hole departments, the temperature detecting system who connects two through-hole departments, the part of gaseous collection system protects, the bottom and the first gas-supply pipe 10 of the through-hole of the bottom center department that will hold coal jar section of thick bamboo 5 simultaneously are connected, the realization is to the protection of temperature detecting system part interconnecting link in second metal protection cover 9, or the gaseous direct output who gathers gaseous collection system, the smooth of testing process has been guaranteed, the accuracy of testing result has been improved.

Further, as shown in fig. 1 and fig. 2, the temperature detection system in this embodiment includes a first thermocouple probe 7 installed in a first metal protection sleeve 6 and a second thermocouple probe 8 installed in a second metal protection sleeve 9, and the first thermocouple probe 7 is connected to a first temperature polling instrument 11, and the second thermocouple probe 8 is connected to a second temperature polling instrument 12.

The embodiment sets up the temperature detection system as installing first thermocouple probe 7 in first metal protective sheath 6, be connected first temperature and patrol appearance 11 with first thermocouple probe 7, thereby carry out real-time measurement and transmit to first temperature and patrol appearance 11 output display to the temperature at broken coal body top in flourishing coal canning 5, and install the second thermocouple probe 8 in second metal protective sheath 9, the second temperature of being connected with second thermocouple probe 8 patrols appearance 12, thereby carry out real-time measurement and transmit to second temperature and patrol appearance 12 output display to the temperature of broken coal body bottom in flourishing coal canning 5, and then obtain the real-time temperature change of the different positions department of broken coal body in the flourishing coal canning 5 of exerting the dead load in-process, obtain coal spontaneous combustion characteristic parameter.

Further, as shown in fig. 3 and fig. 4, the second structural schematic diagram of the experimental apparatus for detecting the spontaneous combustion characteristic parameters of the static load coal for MTS includes a first gas pipe 10 connected to the through hole on the coal containing canister 5, in this embodiment, the first gas pipe 10 penetrates out of the coal containing canister 5 and is connected to a second gas pipe 13, the second gas pipe 13 is communicated with a gas collecting canister 16, a gas pump 15 is arranged on the communicating pipe, and a block valve 14 is arranged on the pipe close to the gas pump 15.

Set up in the gas collection system of this embodiment and go up the first gas-supply pipe 10 that the through-hole is connected with flourishing coal canning is 5, be convenient for the coal body produce gaseous the back through the through-hole and get into first gas-supply pipe 10, then gather in getting into gas collection canning 16 through second gas-supply pipe 13 and store, be favorable to producing gaseous collection to the coal body through setting up aspiration pump 15, shorten the acquisition time, through set up block valve 14 on the pipeline that is close to aspiration pump 15, produce gaseous process that gets into gas collection canning 16 to the coal body and control, be convenient for be used for further composition and concentration detection with the gas of gathering the gas that gets into gas collection canning 16.

Furthermore, the first gas pipe 10 is fixed with the through hole on the coal containing cylinder 5 and the part penetrating out of the coal containing cylinder 5 by welding. Through the arrangement, the connection and the arrangement stability of the first gas pipe 10 are improved, and the smooth gas collection is ensured.

Further, as shown in fig. 1, in this embodiment, the MTS hydraulic system 1 includes a base 1-3 for placing a coal-containing tank 5, support columns 1-2 are disposed at two ends of the base 1-3, a reaction plate 1-1 is fixedly mounted on an upper end surface of the support columns 1-2, a cylinder body 1-4 is fixedly mounted on a lower end surface of the reaction plate 1-1, a piston rod 1-5 is slidably connected in the cylinder body 1-4, a lower end of the piston rod 1-5 is in contact with a piston pressure head 2, displacement scales are disposed on the piston rod 1-5, and the MTS hydraulic system 1 further includes a microcomputer control system 1-6 for controlling the cylinder body 1-4.

The MTS hydraulic system 1 of the embodiment forms a cavity for containing and accommodating a coal containing tank 5 by arranging a base 1-3, a supporting upright post 1-2 and a reaction plate 1-1, a cylinder body 1-4 is fixedly arranged on the lower end surface of the reaction plate 1-1, a piston rod 1-5 is connected in the cylinder body 1-4 in a sliding way, the lower end of the piston rod 1-5 is in contact with a piston pressure head 2 to exert static load on crushed coal contained in the coal containing tank 5, displacement scales are arranged on the piston rod 1-5 to conveniently obtain displacement change of the piston rod 1-5 in the process of applying the static load, and a microcomputer control system 1-6 is used for controlling the movement of the cylinder body 1-4 so as to adjust the static pressure according to specific detection requirements and be suitable for different coal bodies, the accuracy of simulating the deep coal mine environment is improved.

The conventional MTS hydraulic system 1 can select an MTS815 multifunctional servo instrument.

Further, as shown in fig. 2 and 4, in this embodiment, a sealing ring 3 is disposed on the piston head 2, and an insulating layer 4 is disposed on the bottom of the piston head 2 and the outer surface of the coal tank 5.

In the embodiment, the sealing ring 3 is arranged on the piston pressure head 2, so that the air tightness of the coal containing tank cylinder 5 in the static load applying process is improved, the stability of the static load is ensured, the bad leakage of gas generated by a coal body is avoided, the accuracy of simulating the deep coal mine environment is improved, and the accuracy of a detection result is improved; meanwhile, the bottom of the piston pressure head 2 and the outer surface of the coal containing tank cylinder 5 are both provided with the heat preservation layers 4, so that the heat loss generated by the crushed coal in the coal containing tank cylinder 5 in the static load applying process is effectively prevented, and the accuracy of the temperature detection result in the crushed coal is further improved.

The method of detecting the spontaneous combustion characteristic parameters of coal under static load for MTS in the present invention will be described in detail in examples 2 to 3.

Example 2

The method for detecting the coal body temperature by using the MTS static load coal spontaneous combustion characteristic parameter detection experimental device comprises the following steps of:

step one, checking a static load coal spontaneous combustion characteristic parameter detection experimental device for MTS to ensure that the device is intact and has no fault;

secondly, placing a pre-crushed deep coal mine coal sample in a coal containing tank 5 as a crushed coal body, then respectively fixedly installing a first thermocouple probe 7 in a first metal protective sleeve 6 and connecting the first thermocouple probe with a first temperature patrol instrument 11 through a wire, and fixedly installing a second thermocouple probe 8 in a second metal protective sleeve 9 and connecting the second thermocouple probe with a second temperature patrol instrument 12 through a wire penetrating through a first gas pipe 10;

step three, starting the MTS hydraulic system 1, placing the piston pressure head 2 above the crushed coal in the coal containing tank cylinder 5, adjusting the position to ensure that the coal containing tank cylinder 5 and the piston pressure head 2 are integrally positioned at the vertical position of the piston rod 1-5, then controlling the movement of the cylinder body 1-4 through a microcomputer control system 1-6 and adjusting the static load value, so that the piston rod 1-5 in the cylinder body 1-4 stretches and retracts, drives the piston pressure head 2 to slide on the inner wall of the coal containing tank cylinder 5, acts on the crushed coal and applies the static load, and simultaneously records the displacement scale change of the piston rod 1-5;

and step four, opening the first temperature polling instrument 11 and the second temperature polling instrument 12, detecting and outputting and recording the temperature change of the top and the bottom in the crushed coal body under different static loads in real time through the first thermocouple probe 7 and the second thermocouple probe 8, and obtaining the temperature parameter spontaneous combustion characteristic of the coal body.

Example 3

The method for detecting the gas generated by the coal body by using the experimental device for detecting the spontaneous combustion characteristic parameters of the coal under the static pressure bearing of the MTS comprises the following steps:

step one, checking a static load coal spontaneous combustion characteristic parameter detection experimental device for MTS to ensure that the device is intact and has no fault;

placing a pre-crushed deep coal mine coal sample in a coal containing cylinder 5 as a crushed coal body, plugging a through hole at the eccentric position of the bottom of a piston pressure head 2 by adopting a hexagonal screw, covering the upper end of the through hole at the center of the bottom of the coal containing cylinder 5 by adopting gauze, connecting a first gas pipe 10 to the lower end of the through hole at the center of the bottom of the coal containing cylinder 5, enabling the first gas pipe 10 to penetrate out of the coal containing cylinder 5 and be connected with a second gas pipe 13, arranging an air suction pump 15 on a pipeline communicated with the second gas pipe 13 and a gas collection cylinder 16, and arranging a cut-off valve 14 on a pipeline close to the air suction pump 15;

step three, starting the MTS hydraulic system 1, placing the piston pressure head 2 above the crushed coal in the coal containing tank cylinder 5, adjusting the position to ensure that the coal containing tank cylinder 5 and the piston pressure head 2 are integrally positioned at the vertical position of the piston rod 1-5, then controlling the movement of the cylinder body 1-4 through a microcomputer control system 1-6 and adjusting the static load value, so that the piston rod 1-5 in the cylinder body 1-4 stretches and retracts, drives the piston pressure head 2 to slide on the inner wall of the coal containing tank cylinder 5, acts on the crushed coal and applies the static load, and simultaneously records the displacement scale change of the piston rod 1-5;

and step four, under the action of a static load, generating gas by the crushed coal contained in the coal containing cylinder 5, opening the block valve 14 and starting the air pump 15, so that the generated gas of the coal enters the first gas conveying pipe 10 through the through hole, then enters the gas collecting cylinder 16 through the second gas conveying pipe 13 for collection and storage, and then further detecting the composition and concentration of the generated gas of the coal in the gas collecting cylinder 16 to obtain the spontaneous combustion characteristic of the composition and concentration of the generated gas of the coal.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.