CN104296956A - Sublevel caving/mining longwall face goaf flow filed simulation test device and method - Google Patents
Sublevel caving/mining longwall face goaf flow filed simulation test device and method Download PDFInfo
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Abstract
Description
技术领域 technical field
本发明涉及一种试验装置及方法，尤其适用于矿山安全中模拟仿真获取试验数据使用的综放/采长壁工作面采空区流场模拟试验装置及方法。 The invention relates to a test device and method, and is especially suitable for a fully mechanized caving/longwall working face goaf flow field simulation test device and method used for simulation and acquisition of test data in mine safety.
背景技术 Background technique
在矿井开采过程中，随着工作面的推进，煤层采空，采场原有的力学平衡状态遭到破坏，失去支撑的上覆岩层发生位移变形，直至破坏垮落，在工作面后方形成大量由松散煤岩堆积体构成的采空区。 In the process of mine mining, as the working face advances, the coal seam is mined out, the original mechanical balance of the stope is destroyed, and the overlying strata that loses support is displaced and deformed until it collapses, forming a large number of rocks behind the working face. A goaf formed by loose coal and rock deposits.
厚煤层综放工作面回采率一般在80%以下，采空区的遗煤比较多，成为自然发火的物质基础；放煤和顶板垮落范围较大，在矿压作用下，采场后方形成椭球状的冒落、破碎带，采空区在短时期内不会被压实，漏风通道畅通，浮煤极易发生氧化生成有毒有害气体，甚至造成采空区火灾隐患；同时，大量遗煤在采空区中逐渐释放瓦斯并随采空区内部的漏风运移，也易造成瓦斯事故。采空区自燃火灾和瓦斯的涌出严重威胁了采场工作人员的身体健康和矿井的安全回采必须加以研究，而认识采空区流场特性是开展此类研究的基础。 The recovery rate of fully mechanized caving working faces in thick coal seams is generally below 80%, and there are many coal residues in goafs, which become the material basis for spontaneous combustion; Ellipsoid-shaped caving and broken zones, the goaf will not be compacted in a short period of time, the air leakage channel is unblocked, and the floating coal is easily oxidized to generate toxic and harmful gases, and even cause fire hazards in the goaf; at the same time, a large amount of coal remains The gas is gradually released in the goaf and migrates with the air leakage inside the goaf, which is also likely to cause gas accidents. Spontaneous fire and gas gushing in the goaf seriously threaten the health of stope workers and the safe mining of mines must be studied, and understanding the characteristics of the goaf flow field is the basis for such research.
由于综放/采长壁工作面采空区内部的隐蔽性强、破坏性大，对采空区流场主要参数进行系统观测的可行性不大，模拟实验是研究瓦斯流动、自然发火等采空区流场相关问题的主要手段。目前，对采空区流场相关问题的模拟主要采用两种方法，一是通过借助于现代计算分析技术的采空区流场特性的数值模拟；二是通过铺设相似材料搭建物理模型进行物理模拟。数值模拟的客观性不强，结论易偏离实际，必须在物理模拟或现场实测数据修正的前提下才能克服上述缺点，这就显得采空区流场的物理模拟尤为重要。目前，已有的采空区流场物理模拟方法多是在封闭空间直接充填颗粒介质，例如如碎煤、碎石等实现对采空区的模拟，而这些充填物上并没有加载上覆压力，即使有些模型加载了上覆压力，加载力和实际的上覆地层的应力也不具相似性，也就是说矿压对采空区流场的影响没有被考虑，因而不能将矿压作用下的流场性质完全地体现在相似模型上，导致通过物理模拟得到的研究结论与实际情况还不能较好的吻合。 Due to the strong concealment and destructiveness inside the goaf of the fully mechanized caving/longwall working face, it is not feasible to systematically observe the main parameters of the goaf flow field. The simulation experiment is to study gas flow, spontaneous combustion, etc. The main tool for problems related to void flow fields. At present, there are mainly two methods to simulate the problems related to the goaf flow field. One is to simulate the flow field characteristics of the goaf by means of modern calculation and analysis technology; the other is to build a physical model by laying similar materials for physical simulation. . The objectivity of numerical simulation is not strong, and the conclusions are easy to deviate from the reality. The above shortcomings must be overcome on the premise of physical simulation or field measurement data correction, which makes the physical simulation of goaf flow field particularly important. At present, most of the existing physical simulation methods for the goaf flow field are to directly fill the closed space with granular media, such as crushed coal, gravel, etc., to simulate the goaf, and these fillings are not loaded with overlying pressure. , even if the overlying pressure is loaded in some models, the loading force is not similar to the actual stress of the overlying formation, that is to say, the influence of mine pressure on the goaf flow field is not considered, so the The nature of the flow field is completely reflected in the similar model, which leads to the fact that the research conclusion obtained through the physical simulation cannot be well matched with the actual situation.
发明内容 Contents of the invention
发明目的：针对现有技术的不足之处，提供一种结构简单，使用方便，可以真实还原综放/采长壁工作面采空区塌陷以及燃烧和工作面气体流动流场的综放/采长壁工作面采空区流场模拟试验装置及方法。 Purpose of the invention: Aiming at the deficiencies of the prior art, provide a fully-mechanized caving/mining caving/mining system that is simple in structure, easy to use, and can truly restore the collapse of the goaf in the fully-mechanized caving/mining longwall working face and the gas flow field of the combustion and working face. Device and method for simulation test of goaf flow field in longwall working face.
技术手段：为实现上述技术目的，本发明的综放/采长壁工作面采空区流场模拟试验装置，包括充填有仿真煤层的试验箱体，所述仿真煤层由上覆岩层和遗留煤层构成，试验模型箱的仿真煤层下方处设有采空区流场试验系统，所述采空区流场试验系统包括设在试验箱体底部的液压升降装置，所述的液压升降装置包括直线排列的多个液压升降杆和与液压升降杆相互连接的液压装置启动器，液压升降装置上铺有与液压升降杆相配合的多块条带状滑块，所述条带状滑块两侧挖有凹槽，多个条带状滑块直线排列从而在条带状滑块两侧分别形成进风巷道和回风巷道，所述试验箱体上位于进风巷道和回风巷道处分别设有进风口和出风口，进风口上设有精密鼓风机，所述条带状滑块上表面上设有槽型硅管，并设有均匀排列的多个孔洞，所述孔洞内设有不跟随条带状滑块上下升降的热电偶、速度传感器和气体检测仪，所述热电偶、速度传感器和气体检测仪的输出端分别连接到数据采集器的输入端。 Technical means: In order to achieve the above technical purpose, the goaf flow field simulation test device of fully mechanized caving/mining longwall working face of the present invention includes a test box filled with a simulated coal seam. Composition, the goaf flow field test system is provided under the simulated coal seam of the test model box, the gob flow field test system includes a hydraulic lifting device arranged at the bottom of the test box, and the hydraulic lifting device includes a linear arrangement A plurality of hydraulic lifting rods and a hydraulic device starter connected with the hydraulic lifting rods. The hydraulic lifting device is covered with a plurality of strip-shaped sliders that match the hydraulic lifting rods. The two sides of the strip-shaped sliders are dug There are grooves, and a plurality of strip-shaped sliders are arranged in a straight line to form an air inlet tunnel and a return air tunnel on both sides of the strip-shaped slider. The test box is respectively equipped with The air inlet and the air outlet are equipped with a precision blower, and the upper surface of the strip-shaped slider is provided with grooved silicon tubes and a plurality of holes arranged evenly. A thermocouple, a speed sensor and a gas detector that the strip slider moves up and down, and the output ends of the thermocouple, the speed sensor and the gas detector are respectively connected to the input ends of the data collector.
所述的试验箱体为钢化玻璃结构，液压升降杆为气动或油动液压杆；所述热电偶、速度传感器和气体检测仪下方设有固定在试验箱体内的支架，当液压升降杆升起时，热电偶、速度传感器和气体检测仪被收在条带状滑块的孔洞内，当液压升降杆降下时，则热电偶、速度传感器和气体检测仪不跟随带状滑块下降，在条带状滑块降下后从带状滑块的孔洞内探出。 The test box is of tempered glass structure, and the hydraulic lifting rod is a pneumatic or oil-driven hydraulic rod; a bracket fixed in the test box is provided under the thermocouple, speed sensor and gas detector, and when the hydraulic lifting rod is raised When the temperature rises, the thermocouple, speed sensor and gas detector are received in the holes of the strip-shaped slider. When the hydraulic lifting rod is lowered, the thermocouple, speed sensor and gas detector do not follow the strip-shaped slider. Protrude from the hole of the ribbon slider after the ribbon slider is lowered.
一种综放/采长壁工作面采空区流场模拟试验方法，其步骤如下： A fully mechanized caving/mining longwall working face goaf flow field simulation test method, the steps are as follows:
a. 利用液压控制装置控制试验箱体底部的多个液压升降杆连带条带状滑块升起，在试验箱体内由下往上依次铺设遗留煤层和上覆岩层，所述遗留煤层为干散的散体煤，所述上覆岩层石膏粉、碳酸钙粉和硼砂混合而成； a. Use the hydraulic control device to control multiple hydraulic lifting rods at the bottom of the test box with strip-shaped sliders to rise, and lay the remaining coal seam and overlying rock layer in the test box from bottom to top. The leftover coal seam is dry bulk The bulk coal is formed by mixing gypsum powder, calcium carbonate powder and borax in the overlying strata;
b. 启动液压控制装置控制直线排列的液压升降杆带动条状滑块依次降下，设置在条带状滑块上的上覆岩层与遗留煤层之间的离层空间在模拟的矿压作用下逐步增大，当达到上覆岩层的破坏极限时，即产生变形破坏，直至垮落，从而模拟还原采空区流场的场景，同时随着条带状滑块下降后，设在条带状滑块孔洞中的热电偶、速度传感器和气体检测仪从孔洞内探出； b. Start the hydraulic control device to control the linearly arranged hydraulic lifting rods to drive the strip sliders to descend in sequence, and the separation space between the overlying rock layer and the remaining coal seam set on the strip sliders is gradually reduced under the simulated mine pressure. increase, when the damage limit of the overlying stratum is reached, deformation and failure will occur until it collapses, thereby simulating and restoring the scene of the goaf flow field. The thermocouples, speed sensors and gas detectors in the block holes protrude from the holes;
c. 从条带状滑块孔洞内探出热电偶、速度传感器和气体检测仪伸入条带状滑块上方暴露在遗留煤层塌陷后形成的遗煤中，之后开启进风口上的精密鼓风机向进风巷道中鼓风，打开电源）给设置在条带状滑块上的槽型硅管供电，逐步提升槽型硅管温度从而引燃遗留煤层塌陷后形成的遗煤，之后启动热电偶、速度传感器和气体检测仪，利用热电偶监测采空区的温度场变化，利用气体检测仪监测模拟工作面采空区塌陷情况的遗煤燃烧后的氧气、甲烷、CO、二氧化碳，氮气、C2H4、C2H6、C3H8气体组分的比重，利用速度传感器监测模拟工作面采空区中燃烧产生的流场流动流，并将热电偶、速度传感器和气体检测仪监测的数据发送到数据采集器中记录下来从而完成试验的数据获取。 c. Protrude thermocouples, speed sensors and gas detectors from the holes in the strip-shaped slider to extend above the strip-shaped slider to expose the remaining coal formed after the collapse of the remaining coal seam, and then turn on the precision blower on the air inlet. Blow air in the air inlet roadway, turn on the power supply) to supply power to the grooved silicon tubes set on the strip-shaped slider, gradually increase the temperature of the grooved silicon tubes to ignite the remaining coal formed after the collapse of the remaining coal seam, and then start the thermocouple, Speed sensor and gas detector, use thermocouple to monitor the temperature field change of goaf, use gas detector to monitor oxygen, methane, CO, carbon dioxide, nitrogen, C 2 The specific gravity of H 4 , C 2 H 6 , and C 3 H 8 gas components, using velocity sensors to monitor the flow field flow flow generated by combustion in the simulated working face goaf, and using thermocouples, velocity sensors and gas detectors to monitor the The data is sent to the data collector and recorded to complete the data acquisition of the experiment.
在进行瓦斯流场试验时，则在条带状滑块上设置甲烷输出气管，并将条带状滑块内设置的热电偶和气体检测仪替换为甲烷气体检测仪，之后通过甲烷输出气管释放甲烷，开启精密鼓风机向条带状滑块形成的进风巷道鼓风，用设置在条带状滑块上的甲烷气体检测仪和速度传感器记录监测信息，并将监测信息发送到数据采集器中记录后得到瓦斯浓度场的分布特征。 When carrying out the gas flow field test, the methane output gas pipe is installed on the strip-shaped slider, and the thermocouple and gas detector installed in the strip-shaped slider are replaced with a methane gas detector, and then released through the methane output gas pipe For methane, turn on the precision blower to blow air into the air inlet tunnel formed by the strip-shaped slider, record the monitoring information with the methane gas detector and speed sensor set on the strip-shaped slider, and send the monitoring information to the data collector After recording, the distribution characteristics of the gas concentration field are obtained.
有益效果：本发明在钢化玻璃制成的试验箱体内设置液压升降杆和条带状滑块，并在条带状滑块上铺上上覆岩层和煤层模拟煤层，并通过液压升降杆升降模拟工作面塌陷后形成遗煤过程，结构简单，方便观察全过程，同时充分体现了上覆岩层与遗留煤层之间的离层空间在矿压作用下逐步增大的过程，模拟效果好，同时在模拟过程后可以引燃塌陷遗煤，并通过热电偶、速度传感器和气体检测仪收集研究采空区发火时气体产物参数以及火灾烟气的流动规律，还可以用以掌握采空区温度场和瓦斯流场的分布规律，试验方法简单，模拟结果对于了解采空区的火灾状态、气体运移规律以及治理采空区自燃、瓦斯灾害具有指导意义。 Beneficial effects: the present invention sets a hydraulic lifting rod and a strip-shaped slider in a test box made of tempered glass, and lays an overburden layer and a coal seam on the strip-shaped slider to simulate a coal seam, and simulates the coal seam by lifting and lowering the hydraulic lifting rod. The process of forming coal residues after the subsidence of the working face has a simple structure and is convenient for observing the whole process. At the same time, it fully reflects the process of the gradual increase of the separation space between the overlying strata and the remaining coal seams under the action of mine pressure. The simulation effect is good. After the simulation process, the subsidence coal can be ignited, and the gas product parameters and the flow law of fire smoke in the goaf can be collected and studied through thermocouples, velocity sensors and gas detectors. It can also be used to grasp the temperature field and The distribution law of the gas flow field, the test method is simple, and the simulation results have guiding significance for understanding the fire state of the goaf, the law of gas migration, and the control of spontaneous combustion and gas disasters in the goaf.
附图说明 Description of drawings
图1为本发明综放/采长壁工作面采空区流场特性的物理模拟装置结构图； Fig. 1 is the structural diagram of the physical simulation device of the present invention fully mechanized caving/mining longwall working face gob flow field characteristics;
图2 为本发明的条带状滑块两侧凹槽特征图； Fig. 2 is a characteristic diagram of grooves on both sides of the strip-shaped slider of the present invention;
图3为本发明综放/采长壁工作面采空区流场特性的物理模拟装置条带状滑块上方俯视图； Fig. 3 is the upper plan view of the strip-shaped slider of the physical simulation device of the goaf flow field characteristics of the fully mechanized caving/mining longwall working face of the present invention;
图4为本发明综放/采长壁工作面采空区上部煤层和顶板随采随落过程示意图； Fig. 4 is the schematic diagram of the coal seam and the top plate in the goaf upper part of the fully mechanized caving/mining longwall working face of the present invention and the process of falling with mining;
图中：1-试验箱体，2-上覆岩层，3-煤层，4-条带状滑块，5-液压升降杆，6-进风巷道，7-回风巷道，8-精密鼓风机，9-热电偶，10-速度传感器，11-气体检测仪，12-槽型硅管，13-电源，14-数据采集器，15-液压控制装置，16-凹槽。 In the figure: 1-test box, 2-overlying rock formation, 3-coal seam, 4-strip slider, 5-hydraulic lifting rod, 6-inlet airway, 7-return airway, 8-precision blower, 9-thermocouple, 10-speed sensor, 11-gas detector, 12-groove silicon tube, 13-power supply, 14-data collector, 15-hydraulic control device, 16-groove.
具体实施方式 Detailed ways
下面结合附图对本发明的具体实施方式进行进一步说明， The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing,
如图1所示，本发明的综放/采长壁工作面采空区流场模拟试验装置，它包括充填有仿真煤层的试验箱体1，所述的试验箱体1为钢化玻璃结构，长宽高为3800 mm×2000 mm×1500mm，所述仿真煤层由上覆岩层2和遗留煤层3构成，试验模型箱的仿真煤层下方处设有采空区流场试验系统，所述采空区流场试验系统包括设在试验箱体1底部的液压升降装置，所述的液压升降装置包括直线排列的多个液压升降杆5和与液压升降杆5相互连接的液压装置启动器15，所述液压升降杆5为气动或油动液压杆，液压升降装置上铺有与液压升降杆5相配合的多块条带状滑块4，所述条带状滑块4两侧挖有凹槽13，多个条带状滑块4直线排列从而在条带状滑块4两侧分别形成进风巷道和回风巷道，所述试验箱体1上位于进风巷道和回风巷道处分别设有进风口6和出风口7，进风口6上设有精密鼓风机8，所述条带状滑块4上表面上设有槽型硅管12，并设有均匀排列的多个孔洞，所述孔洞内设有不跟随条带状滑块4上下升降的热电偶9、速度传感器10和气体检测仪11，所述热电偶9、速度传感器10和气体检测仪11的输出端分别连接到数据采集器14的输入端,所述热电偶9、速度传感器10和气体检测仪11下方设有固定在试验箱体1内的支架，当液压升降杆5升起时，热电偶9、速度传感器10和气体检测仪11被收在条带状滑块4的孔洞内，当液压升降杆5降下时，则热电偶9、速度传感器10和气体检测仪11不跟随带状滑块4下降，在条带状滑块4降下后从带状滑块4的孔洞内探出；所述热电偶9、速度传感器10和气体检测仪11型号均为现有销售产品。 As shown in Figure 1, fully mechanized caving/mining longwall working face goaf flow field simulation test device of the present invention, it comprises the test box body 1 that is filled with simulated coal seam, and described test box body 1 is tempered glass structure, The length, width and height are 3800mm×2000mm×1500mm. The simulated coal seam is composed of the overlying rock layer 2 and the remaining coal seam 3. A goaf flow field test system is installed under the simulated coal seam of the test model box. The goaf The flow field test system includes a hydraulic lifting device arranged at the bottom of the test box 1. The hydraulic lifting device includes a plurality of hydraulic lifting rods 5 arranged in a straight line and a hydraulic device starter 15 interconnected with the hydraulic lifting rods 5. The hydraulic lifting rod 5 is a pneumatic or oil-driven hydraulic rod. The hydraulic lifting device is covered with a plurality of strip-shaped sliders 4 that match the hydraulic lifting rod 5. Grooves 13 are dug on both sides of the strip-shaped slider 4. , a plurality of strip-shaped sliders 4 are arranged in a straight line so as to form an air inlet tunnel and a return air tunnel on both sides of the strip-shaped slider 4, and the test box 1 is respectively equipped with The air inlet 6 and the air outlet 7, the air inlet 6 is provided with a precision blower 8, the upper surface of the strip-shaped slider 4 is provided with a grooved silicon tube 12, and is provided with a plurality of holes evenly arranged, the holes A thermocouple 9, a speed sensor 10, and a gas detector 11 that do not follow the strip-shaped slider 4 up and down are provided inside, and the output terminals of the thermocouple 9, the speed sensor 10, and the gas detector 11 are respectively connected to the data collector 14, the thermocouple 9, the speed sensor 10 and the gas detector 11 are provided with a bracket fixed in the test chamber 1. When the hydraulic lifting rod 5 rises, the thermocouple 9, the speed sensor 10 and the gas detector 11 The detector 11 is received in the hole of the strip-shaped slider 4. When the hydraulic lifting rod 5 is lowered, the thermocouple 9, the speed sensor 10 and the gas detector 11 do not follow the strip-shaped slider 4 to descend. After the slide block 4 is lowered, it protrudes from the hole of the strip slide block 4; the models of the thermocouple 9, the speed sensor 10 and the gas detector 11 are all existing sales products.
一种综放/采长壁工作面采空区流场模拟试验方法，其步骤如下： A fully mechanized caving/mining longwall working face goaf flow field simulation test method, the steps are as follows:
a. 利用液压控制装置15控制试验箱体1底部的多个液压升降杆5连带条带状滑块4升起，在试验箱体1内由下往上依次铺设遗留煤层3和上覆岩层2，所述遗留煤层3为干散的散体煤，所述上覆岩层2为石膏粉、碳酸钙粉和硼砂混合而成； a. Utilize the hydraulic control device 15 to control the multiple hydraulic lifting rods 5 at the bottom of the test box 1 to rise together with the strip-shaped slider 4, and lay the remaining coal seam 3 and the overlying rock layer 2 in the test box 1 from bottom to top , the remaining coal seam 3 is dry bulk coal, and the overlying rock layer 2 is a mixture of gypsum powder, calcium carbonate powder and borax;
b. 启动液压控制装置15控制直线排列的液压升降杆5带动条状滑块4依次降下，设置在条带状滑块4上的上覆岩层2与遗留煤层3之间的离层空间在模拟的矿压作用下逐步增大，当达到上覆岩层2的破坏极限时，即产生变形破坏，直至垮落，从而模拟还原采空区流场的场景，同时随着条带状滑块4下降后，设在条带状滑块4孔洞中的热电偶9、速度传感器10和气体检测仪11从孔洞内探出； b. Start the hydraulic control device 15 to control the linearly arranged hydraulic lifting rods 5 to drive the strip sliders 4 to descend in sequence, and the separation space between the overlying rock layer 2 and the remaining coal seam 3 set on the strip sliders 4 is simulated Under the action of the mine pressure, it gradually increases, and when it reaches the damage limit of the overlying strata 2, deformation and failure will occur until it collapses, thereby simulating the scene of restoring the goaf flow field, and at the same time, it descends with the strip-shaped slider 4 Finally, the thermocouple 9, the speed sensor 10 and the gas detector 11 arranged in the hole of the strip-shaped slider 4 are protruded from the hole;
c. 从条带状滑块4孔洞内探出热电偶9、速度传感器10和气体检测仪11)伸入条带状滑块4上方暴露在遗留煤层3塌陷后形成的遗煤中，之后开启进风口6上的精密鼓风机8向进风巷道中鼓风，打开电源13给设置在条带状滑块4上的槽型硅管12供电，逐步提升槽型硅管12温度从而引燃遗留煤层3塌陷后形成的遗煤，之后启动热电偶9、速度传感器10和气体检测仪11，利用热电偶9监测采空区的温度场变化，利用气体检测仪11监测模拟工作面采空区塌陷情况的遗煤燃烧后的氧气、甲烷、CO、二氧化碳，氮气、C2H4、C2H6、C3H8气体组分的比重，利用速度传感器10监测模拟工作面采空区中燃烧产生的流场流动流，并将热电偶9、速度传感器10和气体检测仪11监测的数据发送到数据采集器14中记录下来从而完成试验的数据获取。 c. Protrude the thermocouple 9, speed sensor 10 and gas detector 11 from the hole of the strip-shaped slider 4) and extend into the top of the strip-shaped slider 4 to be exposed to the coal residue formed after the collapse of the remaining coal seam 3, and then open The precision blower 8 on the air inlet 6 blows air into the air inlet tunnel, and the power supply 13 is turned on to supply power to the trough-shaped silicon tube 12 arranged on the strip-shaped slider 4, gradually increasing the temperature of the trough-shaped silicon tube 12 to ignite the remaining coal seam 3 Coal residue formed after the collapse, then start the thermocouple 9, speed sensor 10 and gas detector 11, use the thermocouple 9 to monitor the temperature field change of the goaf, and use the gas detector 11 to monitor the collapse of the gob in the simulated working face The specific gravity of oxygen, methane, CO, carbon dioxide, nitrogen, C 2 H 4 , C 2 H 6 , and C 3 H 8 gas components after combustion of the remaining coal, and the velocity sensor 10 is used to monitor the combustion production in the goaf of the simulated working face The flow field flows in the flow field, and the data monitored by the thermocouple 9, the velocity sensor 10 and the gas detector 11 are sent to the data collector 14 for recording to complete the data acquisition of the test.
当进行瓦斯流场试验时，则在条带状滑块4上设置甲烷输出气管，并将条带状滑块4内设置的热电偶9和气体检测仪11替换为甲烷气体检测仪11，之后通过甲烷输出气管释放甲烷，开启精密鼓风机7向条带状滑块4形成的进风巷道鼓风，用设置在条带状滑块4上的甲烷气体检测仪11和速度传感器10记录监测信息，并将监测信息发送到数据采集器14中记录后得到瓦斯浓度场的分布特征。 When carrying out the gas flow field test, the methane output gas pipe is arranged on the strip-shaped slider 4, and the thermocouple 9 and the gas detector 11 arranged in the strip-shaped slider 4 are replaced by the methane gas detector 11, and then Methane is released through the methane output pipe, the precision blower 7 is turned on to blow air into the air inlet tunnel formed by the strip-shaped slider 4, and the monitoring information is recorded with the methane gas detector 11 and the speed sensor 10 arranged on the strip-shaped slider 4, The monitoring information is sent to the data collector 14 for recording to obtain the distribution characteristics of the gas concentration field.
本方法通过对采空区火灾、瓦斯流场的模拟实验，可揭示采空区自然火灾过程中产生的气体产物以及火灾、瓦斯等灾害气体的流动规律，掌握采空区温度场的规律，模拟的结果对于了解采空区的火灾状态、气体产物及运移规律以及防治采空区瓦斯灾害具有重大指导意义。 This method can reveal the gas products produced in the natural fire process of the goaf and the flow law of disaster gases such as fire and gas through the simulation experiment of the goaf fire and gas flow field, grasp the law of the temperature field of the goaf, and simulate The results have great guiding significance for understanding the fire state, gas products and migration laws of goafs, and preventing and controlling gas disasters in goafs.
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