CN106593369A - Simulating test method of CH4 layered displacement by CO2 in multi-layer superposed gas-containing system - Google Patents

Simulating test method of CH4 layered displacement by CO2 in multi-layer superposed gas-containing system Download PDF

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CN106593369A
CN106593369A CN 201611123756 CN201611123756A CN106593369A CN 106593369 A CN106593369 A CN 106593369A CN 201611123756 CN201611123756 CN 201611123756 CN 201611123756 A CN201611123756 A CN 201611123756A CN 106593369 A CN106593369 A CN 106593369A
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gas
ram
coal
sensor
end
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CN 201611123756
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张超林
许江
刘义鑫
尹光志
彭守建
王维忠
刘晓瑞
张小蕾
郭世超
吴善康
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重庆大学
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/006Production of coal-bed methane
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/164Injecting CO2 or carbonated water
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells

Abstract

The invention discloses a simulating test method of CH4 layered displacement by CO2 in a multi-layer superposed gas-containing system. The simulating test method comprises the following steps of preparing tests, loading stress, adsorbing gas, displacing methane, and completing the primary test and the other tests in the same group. Permeable plates of the inner bottom of a test-piece box adopted by the tests are arranged in a sectionalized mode, and an airflow passageway is formed below each permeable plate. When moulded coal is formed, coal layers in the test-piece box corresponds to the permeable plates one to one, and similar materials are arranged between the coal layers in a spaced mode so as to simulate a rock layer. An extracting branch pipe with the direction contrary to the Y-direction pressure is buried in each coal layer. Therefore, the simulating test method of CH4 layered displacement by the CO2 in a horizontal well of the multi-layer superposed gas-containing system lays the foundation for follow-up study of CH4 displacement by the CO2 in the horizontal well of the multi-layer superposed gas-containing system.

Description

多层叠置含气系统C〇2分层驱替CH4模拟试验方法 Stacking of layered gas displacement system C〇2 CH4 simulation test

技术领域 FIELD

[0001] 本发明属于煤层气开采模拟试验技术领域,具体地讲,特别涉及一种多层叠置含气系统C〇2分层驱替CH4模拟试验方法。 [0001] The present invention belongs to the technical field CBM simulation test, in particular, it relates particularly CH4 gas system C〇2 driving simulation test stratified for containing a multilayer laminated.

背景技术 Background technique

[0002] 目前,煤层气是一种由煤层生成并主要以吸附状态储集于煤层中的非常规天然气,主要成分为甲烷。 [0002] Currently, a method of generating a CBM is mainly adsorbed state seam and in coal seam reservoirs unconventional natural gas composed mainly of methane. 煤层气是我国21世纪重要的新型洁净能源和战略资源。 CBM is an important new clean energy and strategic resources of the 21st century. 我国煤层气资源量巨大,其中埋深在1000~2000m的资源量占2000m以浅总资源量的三分之二以上。 China's huge CBM resources, of which two-thirds of 2000m depth in shallow total resources of 1000 ~ 2000m resources accounted for more than. 多层叠置含气系统是近年来在单一含煤层气系统的基础上提出并经过论证的学术观点。 Stacking of gas through the system proposed in recent years and academic point of view based on a single argument containing the CBM system. 它指在同一区域内,垂向叠加多个相互独立的含煤层气系统,为沉积-水文-构造条件耦合控气的产物,主要存在于我国西南地区,如滇东一黔西地区。 It implies in the same area, the vertical superposition of multiple independent systems containing coal bed methane, to deposit - hydrological - configured to control the coupling condition of the product gas, mainly in the southwest region of China, such as a Diandong Guizhou Areas. 黔西地区晚二叠世龙潭组和长兴组形成于陆相一海陆过渡相沉积环境,含煤3~80层,可采1~26层;垂向上发育2~3个煤层群, 煤层间距变化于〈1.0~30m之间,具备多煤层开采煤层气的地质条件。 Qianxi longtan Late Permian Changxing group and formed on a continental transitional facies depositional environment, coal containing 3 to 80 layers, from 1 to 26 recoverable layer; developmentally vertical seam group 2 to 3, the pitch change seam between <1.0 ~ 30m, comprising the geological conditions CBM multiple seams.

[0003] 我国煤层气开发所面临的主要问题是煤储层压力、渗透率和含气饱和度普遍较低,从而造成大部分煤层气井产气率很低,回采周期很长,严重制约了我国煤层气产业的发展。 [0003] The main problem faced by our country to develop coal-bed methane coal reservoir pressure, generally low permeability and gas saturation, causing most of the coalbed methane well gas production rate is very low, the recovery period is very long, seriously hampered China the development of coalbed methane industry. 20世纪末,随着美国圣胡安盆地将C0 2注入煤层以提高煤层气采出率(C02-ECBM)实验的成功,有关煤对CH4/C0 2二元气体吸附实验的研究成为热点。 20th century, the United States as the San Juan basin seam C0 2 is injected to increase the rate of recovery of coalbed methane (C02-ECBM) successful experiment, studies on coal on CH4 / C0 2 binary gas adsorption experiments become hot. 就煤层注气增加产气率或促排煤层瓦斯而言,目前人们比较关注是C〇dPN 2(或空气)。 Coal seam gas injection to increase the gas production rate or chelating seam gas, the current people are more concerned about is C〇dPN 2 (or air). 煤对气体吸附能力由强到弱的顺序是⑶2>CH4>N 2。 Coal gas adsorption capacity from strong to weak is ⑶2> CH4> N 2. 从煤层气开采的角度看,C02是一种十分理想的注气气源,因为⑶:^注入煤层后,不仅可以大量地置换吸附状态的CH 4,增加甲烷的采出率,还能将C02这一温室气体埋藏在地层中,避免其对大气的污染。 From the perspective of view CBM, C02 is a very good source of insufflation gas, because ⑶: ^ seam after the injection, not only a large amount of displacement of Adsorption of CH 4, increase the recovery rate of methane, but also the C02 this buried in the formation of greenhouse gases, which avoid pollution of the atmosphere.

[0004] C02驱替CH4的原理主要包括以下几点:①注入气体后,煤层气的分压被降低,煤层气解吸与三维应力有关,当压力降低时,有利于煤层气解吸;②气体注入后,由于煤层内部空间有限,煤层气会被驱赶出来;③注入气体,总的压力必然会提高,打破原来的压力平衡状态,在压差的作用下能够增大流速,也有利于煤层气的解吸;④由于气体与甲烷竞相吸附能力的不同,注入气体后可引起煤层膨胀或收缩以此来降低或提高煤层渗透性。 [0004] C02 and CH4 displacement principles include the following: ① After the injection of gas, coalbed methane partial pressure is lowered, the desorption CBM three-dimensional stress, and when the pressure drops, desorption is conducive CBM; ② gas injection , due to the limited internal space of the seam, CBM will be flushed out; ③ injecting a gas, the total pressure is bound to increase, to break the original pressure equilibrium state, the differential pressure at the flow rate can be increased, but also conducive CBM desorption; ④ due to the different capacity of competing adsorption of methane gas, the gas is injected into the coal seam can cause expansion or contraction in order to reduce or increase the permeability of the coal seam.

[0005] 目前关于C02驱替CH4的模拟试验主要针对小尺度、伪三轴条件下进行研究,无法有效消除边界效应且不能真实还原现场复杂地质情况,最重要的是难以对"多层叠置含气系统"进行co 2分层驱替ch4试验研究,因此有必要提出一种多层叠置含气系统co2分层驱替ch 4 模拟试验方法,以弥补这方面的不足。 [0005] Currently on the C02 flooding simulations to study for the CH4 mainly for small-scale, pseudo triaxial condition, unable to effectively eliminate border effects and can not be true to the complex geological situation at the scene, the most important thing is difficult to "multi-layer stacked with gas system "co 2 Experimental study stratified ch4 for driving, it is necessary to provide a multilayer laminated stratified co2 gas displacement system simulation test ch 4, to compensate for this deficiency.

发明内容 SUMMARY

[0006] 本发明所要解决的技术问题在于提供一种多层叠置含气系统C02分层驱替CH 4模拟试验方法,用于研究各参数对多层叠置含气系统中C02驱替CH4的影响。 [0006] The present invention solves the technical problem is to provide a layered affect gas displacement system C02 CH 4 simulation test for studying the parameters of a plurality of stacked gas displacement system C02 and CH4 containing a multilayer laminated .

[0007] 本发明的技术方案如下:一种多层叠置含气系统co2分层驱替CH4模拟试验方法,包括以下步骤, [0007] aspect of the present invention is as follows: A multilayer laminated CH4-containing gas systems Simulation Test Method co2 layered displacement, comprising the steps of,

[0008] 步骤1、试验准备 [0008] Step 1, the test preparation

[0009] la)将煤样破碎并筛分备用,准备相似材料备用,所述相似材料用于模拟煤层之间的岩层,对传感器进行编号备用; [0009] la) The coal sample crushed and sieved standby, standby prepare similar material, similar to the material used to simulate formation between the coal seams are numbered alternate sensor;

[0010] lb)型煤成型,在试件箱内对煤样和相似材料进行加压成型,并在试件箱内埋入抽采支管和传感器; [0010] lb) briquette molding, pressure molding and similar coal-like material inside the specimen, and embedded in the sensor and the drainage manifold in the specimen box;

[0011] 所述试件箱包括箱体和箱盖,在所述箱体沿长度方向的一端插装有第一水平压头,所述第一水平压头的内端固定有位于箱体内的竖向的第一压板,在所述箱体沿宽度方向的一侧插装有至少两个第二水平压头,所述第二水平压头沿箱体的长度方向均匀布置, 在每一所述第二水平压头的内端均固定有竖向的第二压板,在所述箱盖上插装有与第二水平压头一一对应的竖向压头,在每一所述竖向压头的内端均固定有位于箱体内的水平的第三压板,在所述箱体内底设置有与竖向压头一一对应的透气板,在每一所述透气板下方均设有气流通道,所述气流通道的一端通过透气板与箱体内腔贯通,气流通道的另一端贯穿箱体外壁并各自固定连接有管接头; [0011] The specimen box comprises a box body and a cover, at one end of the case is inserted with the longitudinal direction of the first horizontal ram, the ram end of the first horizontal fixed cabinets located the first vertical pressure plate, one side of the casing in the width direction of the plug with at least two second horizontal ram, the second ram horizontal evenly spaced along the length direction of the case, in each of the the inner end of said second horizontal ram platen are fixed to a second vertical, equipped with a plug on the cover and a second one-horizontal ram vertical ram, each of the vertical the inner end of the ram platen are fixed to a third of the horizontal cabinets, air-permeable plate with the vertical ram-one correspondence of the bottom is provided inside the case, below the air-permeable plates of each stream has end of the channel, the airflow passageway through the plate and the housing inner chamber through the gas permeable, the other end of the gas flow passage through the outer wall of the housing and are each fixedly connected with a pipe joint;

[0012] 所述煤样和相似材料沿箱体长度方向间隔布置,并且煤样位于透气板正上方,相似材料位于相邻透气板之间部位的上方; [0012] The coal and the housing along the longitudinal direction similar to the material of the spacer is disposed, and located directly above the coal gas-permeable plates, similar material is located above the adjacent portion between the gas-permeable plates;

[0013] 所述抽采支管与第二水平压头一一相对布置,所述抽采支管插装在箱体侧壁上, 在每一抽采支管的内端均开有抽采孔; [0013] The drainage branch pipe and a second horizontal ram eleven arranged opposite to the drainage branch pipe inserted in the housing side wall, the inner end of each drainage manifold are opened drainage hole;

[0014] lc)检查密封效果; [0014] lc) to check the sealing effect;

[0015] Id)连接传感器和电脑;在每一所述气流通道的管接头上通过进气管路各自连接有真空栗,每一所述抽采支管的外端各自连接有出气管路,并在每一所述出气管路均上安装有流量计,将所有的出气管路均与开采总管连通,在所述开采总管上安装有甲烷浓度传感器; [0015] Id) and a sensor connected to the computer; on each of said gas flow passage through the pipe joint are each connected to the intake line Li in vacuo, the outer end of each of the drainage manifold are each connected with an air conduit, and each of said outlet pipes are mounted on the flow meter, all of the pipes are in communication with the outlet manifold mining, methane concentration sensor is mounted on the manifold with a mining;

[0016] 步骤2、加载应力 [0016] Step 2, loading stress

[0017] 开启应力加载及数据采集系统,通过各个压头对型煤施加预定应力; [0017] Open stress loading and data acquisition system, by applying a predetermined stress to each ram briquette;

[0018] 步骤3、瓦斯吸附 [0018] Step 3, the adsorption of gas

[0019] 关闭出气管路,启动真空栗对煤样进行抽真空排出空气杂质,抽真空完成后关闭真空栗和进气管路,将进气管路与甲烷气瓶连通,打开甲烷气瓶和进气管路进行充气,按照预定的吸附平衡气压对各个煤层进行充分吸附; [0019] Close outlet conduit, pumpdown Li coal samples impurity exhaust air evacuation, and closing the vacuum inlet line Li after evacuation was complete, the intake line communicates with the methane gas cylinder, the cylinder and the intake pipe open methane Road inflating each seam sufficiently adsorbed in a predetermined adsorption equilibrium pressure;

[0020] 步骤4、甲烷驱替 [0020] Step 4, methane flooding

[0021] 关闭甲烷气瓶和进气管路,将进气管路与二氧化碳气瓶连通,按照预定的试验方案打开相应的进气管路和二氧化碳气瓶,对相应煤层进行甲烷驱替; [0021] Close and methane inlet line cylinders, the intake line communicates with a carbon dioxide gas cylinder, opens the corresponding inlet line and a carbon dioxide gas cylinder according to a predetermined protocol, the corresponding displacement coalbed methane;

[0022] 步骤5、结束一次试验 [0022] Step 5, the end of a test

[0023] 待甲烷浓度传感器读数不再升高时,关闭应力加载及数据采集系统,结束一次试验; When [0023] the methane concentration sensor readings no longer be raised, off loading stress and data acquisition system, the end of a test;

[0024] 步骤6、同组其他试验 [0024] Step 6, with the other test group

[0025] 按照预定的试验方案,对其他单层或者多层重复相应步骤。 [0025] Repeat steps corresponding to other single or multi according to a predetermined protocol.

[0026] 本发明通过在试件箱内设置相互独立的透气板,每一透气板各自连通气流通道, 型煤成型时煤样与透气板一一对应布置用于模拟煤层,在相邻煤层之间间隔相似材料用于模拟岩层,每一煤层各自埋装有抽采支管,试验过程中,可以根据试验方案,对不同的煤层进行甲烷含量模拟,并对不同的煤层单层或者多层进行c〇2驱替模拟,从而提出了一种多层叠置含气系统水平井c〇2分层驱替CH4模拟试验方法,为多层叠置含气系统水平井c〇2驱替CH4的后续研究奠定基础。 [0026] In the present invention, by setting the test piece tank independent gas-permeable plate, each of gas-permeable plates are each airflow passage communicating, when coal briquette molding with gas-permeable plate is arranged to simulate one-seam, the seam adjacent similar material for the simulation interval formation, each seam buried with each drainage manifold, during the test, may be different coalbed methane content according to the test simulation program, and a single layer or a multilayer of different seams for c 〇2 displacement simulation, thus proposes a system of a plurality of stacked horizontal gas wells c〇2 hierarchical flooding CH4 simulation test, a multilayer stacked horizontal wells gas system c〇2 subsequent flooding of CH4 laid basis.

[0027] 作为优选,所述第二水平压头沿箱体的长度方向均匀布置有四个,所述竖向压头与第二水平压头一一对应布置有四个,所述透气板与竖向压头一一对应布置有四个,所述抽采支管与第二水平压头一一对应布置有四个,所述煤层有四层,从远离第一水平压头的一端开始将煤层依次标定为I、Π 、m、IV;所述相似材料在煤层之间间隔布置有三层。 [0027] Advantageously, the second horizontal longitudinal direction of the ram housing has four uniformly disposed, vertical ram and the second one-horizontal ram arrangement has four, and the gas-permeable plate vertical ram arranged one-four, a drainage branch pipe ram and the second one-horizontal arrangement has four, there are four of the seams, the seam starts from an end remote from the head of the first pressure level calibration sequence is I, Π, m, IV; similar to the three-layer material disposed between the spaced seam.

[0028] 所述箱体内压制成型的型煤大小为400mm*400mm* 1050mm。 [0028] The box body is press-molded briquette size 400mm * 400mm * 1050mm.

[0029] 在所述步骤1进行型煤成型时,对型煤沿竖直方向分四次铺设和加压成型,即先在箱体底部相应位置铺设煤样和相似材料,同时在煤样内埋入传感器,然后加压成型;接着进行第二次煤样和相似材料的铺设和加压成型,然后安装抽采支管和传感器;再进行第三次、 第四次铺设和加压成型,并埋入相应位置的传感器。 [0029] Step 1 when the briquette molding, compression molding and laying four times in the vertical direction of the coal, i.e. coal should be laid in the appropriate location, and similar materials bottom of the tank, while in the coal embedded sensors, and compression molding; followed by a second coal laying and compression molding and similar materials, and then install the drainage branch pipe and a sensor; then the third, fourth and lay press molding, and sensors embedded in the corresponding position. 这样分四次对型煤进行压制成型,一方面使型煤的成型更加密实,另一方面便于传感器和抽采管的布置。 Thus in four of the compression molded briquette, on the one hand briquette molding more dense, and the arrangement of the sensor on the other hand to facilitate drainage tube.

[0030] 所述传感器包括21个气体压力传感器、21个温度传感器和21个土压力盒;以型煤靠近第一水平压头一端下方的一个角为原点、以型煤的长度方向为Z轴、竖直方向为X轴、与第二水平压头施压相反的方向为Y轴建立坐标系,21个所述温度传感器在Y= 100的纵面分上下三排均匀布置,该三排的高度分别为Χ=1〇〇、Χ = 200和Χ = 300,每一排的7个温度传感器的Ζ轴坐标分别为133、265、395、526、657、788、919;21个气体压力传感器布置在¥ = 200的纵面上,21个土压力盒布置在Υ = 300的纵面上,气体压力传感器、土压力盒和温度传感器在各自纵面的布置位置相同。 [0030] The sensor 21 comprises a gas pressure sensor, a temperature sensor 21 and the earth pressure cell 21; coal at a corner adjacent to the first end of the lower horizontal ram as an origin, the longitudinal direction is the Z-axis coal , for the X-axis in the vertical direction, and second horizontal direction opposite to the pressing ram as a Y-axis coordinate system is established, the temperature sensor 21 in the longitudinal Y = upper and lower surface 100 are arranged uniformly in three rows, three rows of the Χ = 1〇〇 height respectively, Χ = 200 and Χ = 300, Ζ axis coordinates of each row of the temperature sensor 7, respectively 133,265,395,526,657,788,919; gas pressure sensor 21 disposed in a vertical plane = ¥ 200, the cartridge 21 is arranged in the earth pressure Υ = vertical surface, gas pressure sensor, a temperature sensor and earth pressure cell 300 disposed at the respective positions of the same vertical plane. 其中气体压力传感器用于监测瓦斯压力、温度传感器用于监测煤层温度、土压力盒用于监测煤体应力。 Wherein the gas pressure sensor for monitoring the gas pressure and temperature sensors for monitoring the temperature of the coal seam, earth pressure cell for monitoring the stress coal.

[0031] 步骤1中型煤成型在压制平台上进行,所述压制平台包括长条形的底座,在所述底座上通过四个支撑柱安装有左右两个反力座,所述支撑柱的下端与底座固定,所述反力座的前后两端各自固套在支撑柱上,并且在底座上还固定有竖向的支撑螺杆,在所述支撑螺杆上套装有支撑螺母,所述反力座活套在支撑螺杆上并通过支撑螺母支撑;在所述底座上安装有两根滑轨,所述滑轨位于两个反力座之间,所述试件箱的底部与滑轨配合;在每一所述反力座上均插装有至少两个水平的夹紧杆,所述夹紧杆与反力座螺纹配合,夹紧杆的内端与试件箱侧壁抵紧,夹紧杆的外端固定有手轮。 [0031] Step 1 briquette press molding performed on the platform, said platform comprising an elongate pressing base on the base by the four support posts are mounted left and right reaction force seats the lower end of support column the base is fixed, the reaction front and rear ends of each seat cover fixed on the support column, and is also fixed to a support on the base of the vertical screw, set screw on the support with a support nut, the reaction force base looper and supported by the support screw nut on the support; mounted on said base has two rails, said sliding rail is located between two seats reaction, the bottom of the tank with the specimen slide rail; in each of said base reaction force are interposed with at least two horizontal clamp rod, the clamp rod is threadedly engaged with the base reaction force, the inner end of the clamp rod test piece tightly against the box side walls, the clamping the outer end of the rod is fixed to the handwheel. 这样设置压制平台进行型煤成型,通过夹紧杆抵紧试件箱侧壁,有效地避免了成型过程中压力导致试件箱变形,一方面使试验数据更加准确可靠,另一方面有利于延长试件箱的使用寿命。 Arranged such compression molded briquette platform, against the box side wall by tightening the clamp rod test piece, is effectively avoided during the molding pressure causes deformation of the specimen container, on the one hand to make the test more accurate and reliable data, on the other hand help to extend life test piece box. 并且,反力座活套在支撑螺杆上并通过螺母支撑,便于通过螺母调节反力座的高度。 Further, the reaction force and the looper base by a nut screw supported on the support, to facilitate the height adjustment of the reaction force base by a nut.

[0032] 有益效果:本发明通过在试件箱内设置相互独立的透气板,将煤样与透气板一一对应布置用于模拟煤层,在相邻煤层之间间隔相似材料用于模拟岩层,在每一煤层各自埋装抽采支管,从而提出了一种多层叠置含气系统水平井c〇2分层驱替CH4模拟试验方法,为多层叠置含气系统水平井c〇2驱替CH 4的后续研究奠定了基础。 [0032] Advantageous Effects: The present invention is provided by the test piece tank independent gas-permeable plate, the coal sample and the gas permeable plate is arranged to simulate one-seam, similar to the interval between the adjacent seam materials used to simulate formation, each seam is buried in each drainage manifold, thus presents a plurality of stacked horizontal wells c〇2 gas system hierarchical flooding CH4 simulation test, a multilayer stacked horizontal wells c〇2 gas displacement system CH 4 follow-up study of the foundation.

附图说明 BRIEF DESCRIPTION

[0033] 图1为本发明的步骤示意图。 [0033] FIG. 1 is a schematic view of the steps of the present invention.

[0034] 图2为试件箱和抽采支管的结构示意图。 [0034] FIG. 2 is a schematic structural diagram of the test piece and a drainage tank manifold.

[0035]图3为图2去掉箱盖的俯视图。 [0035] FIG. 3 is a plan view of FIG. 2 of the cover removed.

[0036] 图4为图2的AA剖视图。 [0036] FIG. 4 is a cross-sectional view AA of FIG. 2.

[0037]图5为型煤试件的坐标系示意图。 [0037] FIG. 5 is a schematic diagram of a coordinate system briquette specimens.

[0038]图6为压制平台的结构示意图。 [0038] FIG. 6 is a schematic view of a press platform structure.

[0039] 图7为图6的BB剖视图。 [0039] FIG. 7 is a sectional view BB of FIG. 6.

[0040] 图中标记如下:支撑螺杆1、反力座2、夹紧杆3、手轮4、开采总管5、出气管路6、抽采支管7、箱体8、"0"形密封圈9、箱盖10、竖向压头11、第三压板12、第一压板13、第一水平压头14、 透气板15、第二水平压头16、第二压板17、气流通道18、底座19、支撑柱20、支撑螺母21。 [0040] FIG labeled as follows: a support of the screw 1, the reaction force base 2, the clamp rod 3, the hand wheel 4, mining header 5, the outlet conduit 6, drainage manifold 7, the casing 8, "0" - ring 9, cover 10, the vertical ram 11, a third platen 12, first platen 13, a first horizontal ram 14, air-permeable plate 15, a second horizontal ram 16, a second platen 17, the airflow passage 18, the base 19, the support posts 20, 21 support the nut.

具体实施方式 Detailed ways

[0041] 下面详细描述本发明的实施例,所述的实施例示例在附图中示出,其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。 [0041] Example embodiments of the present invention are described in detail below, exemplary embodiments of the embodiment shown in the accompanying drawings, wherein same or similar reference numerals designate the same or similar elements or elements having the same or similar functions. 下面通过参考附图描述实施例是示例性的,旨在解释本发明,使本发明的技术方案及其有益效果更加清楚、 明确,而不能理解为对本发明的限制。 The following description of embodiments with reference to the accompanying drawings are exemplary embodiments, the present disclosure is intended to explain the aspect of the present invention and its advantageous effects are more apparent, clear, and not be construed as limiting the invention through.

[0042] 如图1所示,本发明包括以下步骤, [0042] As shown in FIG. 1, the present invention comprises the following steps,

[0043] 步骤1、试验准备 [0043] Step 1, the test preparation

[0044] la)将煤样破碎并筛分备用,准备相似材料备用,所述相似材料用于模拟煤层之间的岩层,对传感器进行编号备用。 [0044] la) The coal sample crushed and sieved standby, standby prepare similar material, similar to the material for the formation between the simulated seam, alternate number of sensors. 所述传感器包括21个气体压力传感器,21个温度传感器和21个土压力盒。 The sensor includes a gas pressure sensor 21, temperature sensors 21 and 21 earth pressure cell.

[0045] lb)型煤成型,在试件箱内对煤样和相似材料进行加压成型,并在试件箱内埋入抽米支管7和传感器。 [0045] lb) briquette molding, pressure molding and similar coal-like material inside the specimen, and embedded in suction manifold 7 meters and sensors inside the specimen.

[0046] 如图2、图3和图4所不,所述试件箱包括箱体8和箱盖10,在所述箱盖10与箱体8顶部之间垫装有"0"形密封圈9。 [0046] As shown in FIG. 2, 3 and 4 do not, the specimen box comprises a box body 8 and the cover 10, between the top of the pad cover 10 of the box 8 with "0" ring seal 9 laps. 在所述箱体8沿长度方向的一端插装有第一水平压头14,所述第一水平压头14的内端固定有位于箱体8内的竖向的第一压板13。 One end of the casing 8 is inserted along the longitudinal direction of the head 14 with a first pressure level, the first level of the end of ram 14 is fixed to the casing 8 is located a first vertical pressure plate 13. 在所述箱体8沿宽度方向的一侧插装有至少两个第二水平压头16,所述第二水平压头16沿箱体8的长度方向均匀布置,在每一所述第二水平压头16的内端均固定有竖向的第二压板17。 One side of the housing 8 is inserted in the width direction with at least two second horizontal ram 16, the ram 16 along the second horizontal longitudinal direction of the casing 8 is arranged uniformly in each of said second the inner end of the horizontal ram 16 are fixed to a second vertical plate 17. 在所述箱盖10上插装有与第二水平压头16-一对应的竖向压头11,在每一所述竖向压头11的内端均固定有位于箱体8内的水平的第三压板12。 The cover 10 is inserted in the second level with a vertical ram 16- corresponding ram 11, the inner end of each of the vertical ram 11 are fixed to the casing 8 located level third platen 12. 在所述箱体8内底设置有与竖向压头11 一一对应的透气板15, 在每一所述透气板15下方均设有气流通道18,所述气流通道18的一端通过透气板15与箱体8内腔贯通,气流通道18的另一端贯穿箱体8外壁并各自固定连接有管接头。 8 disposed within the tank has a bottom and vertical ram plate 11 one to one breathable 15, below the plate 15 each have a gas-permeable gas flow passage 18, one end of the gas flow passage 18 through the gas permeable plate through the lumen 15 of the box 8, the other end of the casing through the airflow channel 18 and an outer wall 8 are each fixedly connected with a pipe joint.

[0047] 本实施例优选,所述箱体8内压制成型的型煤大小为400mm*400mm*1050mm。 Preferred embodiments [0047] of the present embodiment, the casing 8 within the briquette press molding size 400mm * 400mm * 1050mm. 所述第二水平压头16沿箱体8的长度方向均匀布置有四个,所述竖向压头11与第二水平压头16- 一对应布置有四个,所述透气板15与竖向压头11 一一对应布置有四个,所述抽采支管7与第二水平压头16-一对应布置有四个,所述煤层有四层,从远离第一水平压头14的一端开始将煤层依次标定为I、Π 、ΙΠ 、IV;所述相似材料在煤层之间间隔布置有三层。 The second horizontal ram 16 along the longitudinal direction of the casing 8 has four uniformly arranged, the ram 11 and the second vertical level are arranged corresponding to a ram 16- four, vertical plate 15 and the gas-permeable four arranged one correspondence to the ram 11, the drainage branch pipe 7 and the second horizontal ram 16- a corresponding arrangement has four, the seam has four layers, from an end remote from the head 14 of the first pressure level the calibration sequence is started seam I, Π, ΙΠ, IV; similar to the three-layer material disposed between the spaced seam.

[0048] 所述煤样和相似材料沿箱体8长度方向间隔布置,并且煤样位于透气板15正上方, 相似材料位于相邻透气板15之间部位的上方。 [0048] The coal and similar materials arranged at intervals along the longitudinal direction of the case 8, and is located directly above the coal gas-permeable plate 15, similar material 15 located above the gas-permeable portion between the adjacent plates.

[0049]如图5所示,以型煤靠近第一水平压头14一端下方的一个角为原点、以型煤的长度方向为Z轴、竖直方向为X轴、与第二水平压头16施压相反的方向为Y轴建立坐标系。 [0049] As shown, a corner 14 at one end adjacent to the first level below the ram coal origin, the longitudinal direction of the coal is the Z-axis, the vertical direction is the X axis, the second horizontal ram 5 16 the pressing direction opposite to the Y-axis coordinate system is established. 21个所述温度传感器在γ=100的纵面分上下三排均匀布置,该三排的高度分别为X=100、X = 200 和X = 300,每一排的7个温度传感器的Z轴坐标分别为133、265、395、526、657、788、919。21个所述气体压力传感器布置在Y = 200的纵面上,21个所述土压力盒布置在Y = 300的纵面上, 所述气体压力传感器、土压力盒和温度传感器在各自纵面的布置位置相同。 The temperature sensor 21 in the longitudinal surface γ = 100 upper and lower three rows of uniformly disposed, the height of the three rows are X = 100, X = 200 and X = 300, Z-axis of each row of the temperature sensor 7 coordinates are 133,265,395,526,657,788,919.21 of said gas pressure sensor 200 is disposed in a vertical plane Y =, 21 of said earth pressure cell 300 disposed in a vertical plane Y = the gas pressure sensor, earth pressure cell and the temperature sensor each arranged in the same position of the longitudinal surface.

[0050] 所述抽采支管7与第二水平压头16-一相对布置,所述抽采支管7插装在箱体8侧壁上,在每一抽采支管7的内端均开有抽采孔。 [0050] The drainage branch pipe 7 and a second opposed horizontal ram 16- arrangement, the drainage branch pipe 7 inserted in the casing side wall 8, the inner end 7 are opened in each drainage manifold drainage holes. 所述抽采支管7位于每一煤层的正中。 The drainage manifold 7 is located in the middle of each seam.

[0051] c)检查密封效果,检查步骤如下: [0051] c) Check the sealing effect, check the following steps:

[0052] i)、关闭抽采支管的出气口,从气流通道18充入高压二氧化碳气体,使箱体8内部吸附平衡后的气压为试验预定气压的1.2倍,然后关闭进气口; [0052] i), closed drainage outlet manifold, the gas flow passage 18 from the high pressure carbon dioxide gas filling, the air pressure inside the suction box 8 balance 1.2 times the predetermined test pressure, and then close the intake port;

[0053] ii)、监控箱体8内气压数据, [0053] ii), monitoring the air pressure data housing 8,

[0054]如果在8h内,气压数据没有明显波动或下降量小于0.02MPa,则认为箱体8密封完好; [0054] If, within 8h, no significant fluctuations in pressure or decrease the data amount is less than 0.02MPa, housing 8 is considered perfectly sealed;

[0055] 如果气压数据下降量大于0.02MPa,但不超过0.1 MPa,则认为箱体8出现漏气,采用皂液检漏法检查出漏气位置,并进行补救; [0055] If the pressure drop is greater than 0.02MPa data, but not more than 0.1 MPa, the casing 8 that there is leakage, the leakage check soap leak detection method using the position, and remedy;

[0056]如果气压数据下降量大于O.IMPa,则箱体8漏气非常严重,需要拆除箱盖10重新安装。 [0056] If the pressure drop is greater than the data O.IMPa, the casing 8 is very serious leak, need to remove the cover 10 reinstalled.

[0057] Id)连接传感器和电脑;在每一所述气流通道18的管接头上通过进气管路各自连接有真空栗,每一所述抽采支管7的外端各自连接有出气管路6,并在每一所述出气管路6均上安装有流量计,将所有的出气管路6均与开采总管5连通,在所述开采总管5上安装有甲烷浓度传感器。 [0057] Id) and a sensor connected to the computer; on the nipple 18 of each gas flow passage through the intake line are each connected to a vacuum Li, each outer end of the suction tube 7 are each taken branch is connected to an outlet conduit 6 and said outlet conduit 6 are each mounted on the meter, all of the outlet pipes 6 are in communication with the extraction header 5, the methane concentration sensor mounted on the manifold 5 have mined.

[0058] 步骤2、加载应力 [0058] Step 2, loading stress

[0059] 开启应力加载及数据采集系统,通过各个压头对型煤施加预定应力。 [0059] Open stress loading and data acquisition system, applying a predetermined stress to the coal through the respective ram.

[0060] 步骤3、瓦斯吸附 [0060] Step 3, the adsorption of gas

[0061] 关闭出气管路6,启动真空栗对煤样进行抽真空排出空气杂质,抽真空完成后关闭真空栗和进气管路,将进气管路与甲烷气瓶连通,打开甲烷气瓶和进气管路进行充气,按照预定的吸附平衡气压对各个煤层进行充分吸附;其中抽真空时间为4小时,甲烷吸附时间为48小时。 [0061] Close outlet conduit 6, to start the vacuum Li coal samples impurity exhaust air evacuation, and closing the vacuum inlet line Li after evacuation was complete, the intake line communicates with the methane gas cylinder, the cylinder and opening into methane inflating gas line, each seam sufficiently adsorbed in a predetermined adsorption equilibrium pressure; wherein the evacuation time was 4 hours, the methane adsorption time is 48 hours.

[0062] 步骤4、甲烷驱替 [0062] Step 4, methane flooding

[0063] 关闭甲烷气瓶和进气管路,将进气管路与二氧化碳气瓶连通,按照预定的试验方案打开相应的进气管路和二氧化碳气瓶,对相应煤层进行甲烷驱替。 [0063] Close and methane inlet line cylinders, the intake line communicates with a carbon dioxide gas cylinder, opens the corresponding inlet line and a carbon dioxide gas cylinder according to a predetermined protocol, the corresponding displacement coalbed methane.

[0064] 步骤5、结束一次试验 [0064] Step 5, the end of a test

[0065] 待甲烷浓度传感器读数不再升高时,关闭应力加载及数据采集系统,结束一次试验。 [0065] When the methane concentration sensor readings no longer be raised, off loading stress and data acquisition system, the end of a test.

[0066] 步骤6、同组其他试验 [0066] Step 6, with the other test group

[0067] 按照预定的试验方案,对其他单层或者多层重复相应步骤。 [0067] Repeat steps corresponding to other single or multi according to a predetermined protocol. 本实施例的试验方案如下表所示: Test solutions of the present embodiment is as follows:

Figure CN106593369AD00091

[0069] 在所述步骤1进行型煤成型时,对型煤沿竖直方向分四次铺设和加压成型,即先在箱体8底部相应位置铺设煤样和相似材料,同时在煤样内埋入传感器,然后加压成型;接着进行第二次煤样和相似材料的铺设和加压成型,然后安装抽采支管7和传感器;再进行第三次、第四次铺设和加压成型,并埋入相应位置的传感器。 [0069] 1 when the briquette forming step, of coal in the vertical direction and laid in four press molding, i.e. the laying of the first coal and similar materials in the appropriate location of the bottom housing 8, while coal buried within the sensor, and then compression molding; followed by a second coal laying and compression molding and similar materials, and then install the drainage branch pipe 7 and a sensor; then the third, fourth and lay press molding , and embedded in the corresponding position of the sensor.

[0070] 如图6和图7所示,步骤1中型煤成型在压制平台上进行,所述压制平台包括长条形的底座19,在所述底座19上通过四个支撑柱20安装有左右两个反力座2,所述支撑柱20的下端与底座19固定,所述反力座2的前后两端各自固套在支撑柱20上。 [0070] FIG. 6 and FIG. 7, step 1 briquette press molding performed on the platform, the platform comprises pressing an elongated base 19, on the base 19 by four support columns 20 mounted about two reaction force base 2, the support base 20 and the lower mounting post 19, front and rear ends of the reaction force base 2 fixed sleeve on each support post 20. 并且在底座19上还固定有竖向的支撑螺杆1,在所述支撑螺杆1上套装有支撑螺母21,所述反力座2活套在支撑螺杆1上并通过支撑螺母21支撑。 And also on the base 19 is fixed to the vertical support of the screw 1, on the support screw nut 21 with a support package 1, the reaction force looper holder 2 on the support 1 and the screw nut 21 is supported by the support. 在所述底座19上安装有两根滑轨,所述滑轨位于两个反力座2 之间,所述试件箱的底部与滑轨配合。 On the base 19 is attached to two rails, said sliding rail is located between the two reaction force base 2, slide member and the bottom of the tank with the sample. 在每一所述反力座2上均插装有至少两个水平的夹紧杆3,所述夹紧杆3与反力座2螺纹配合,夹紧杆3的内端与试件箱侧壁抵紧,夹紧杆3的外端固定有手轮4。 The reaction force on the seat clamp rod 2 are inserted with at least two levels of each of the 3, the clamp rod 3 and the base reaction force with the second screw, the clamping end of the inner tank 3 and the specimen side rails tightly against the wall, the clamp rod 3 is fixed to the outer end of the hand wheel 4.

Claims (6)

  1. 1. 一种多层叠置含气系统C02分层驱替CH4模拟试验方法,其特征在于:包括以下步骤, 步骤1、试验准备la) 将煤样破碎并筛分备用,准备相似材料备用,所述相似材料用于模拟煤层之间的岩层,对传感器进行编号备用; lb) 型煤成型,在试件箱内对煤样和相似材料进行加压成型,并在试件箱内埋入抽采支管和传感器; 所述试件箱包括箱体和箱盖,在所述箱体沿长度方向的一端插装有第一水平压头,所述第一水平压头的内端固定有位于箱体内的竖向的第一压板,在所述箱体沿宽度方向的一侧插装有至少两个第二水平压头,所述第二水平压头沿箱体的长度方向均匀布置,在每一所述第二水平压头的内端均固定有竖向的第二压板,在所述箱盖上插装有与第二水平压头一一对应的竖向压头,在每一所述竖向压头的内端均固定有位于箱体内的水平的第三压板,在 A multilayer laminated stratified gas displacement system C02 CH4 simulation test, characterized by: comprising the following steps, Step 1, the test preparation La) coal sample crushed and sieved to standby, standby prepare similar materials, the similar material for the formation between said simulated seam, are numbered alternate sensor; LB) briquette molding, and similar coal-like material inside the press molding test piece, the test piece and embedded in the drainage tank branch pipe and a sensor; the test piece and the cover box comprises a box body, is inserted in the housing with a first end of the horizontal ram along the longitudinal direction, the inner end of the first horizontal ram fixed cabinets located a first vertical pressure plate in the housing side in the width direction of the plug with at least two second horizontal ram, the second ram uniformly arranged in the horizontal longitudinal direction of the housing, each inner end of the second horizontal ram are fixed to a second vertical pressure plate is inserted in the cover with a second one-horizontal ram vertical ram, in each of the vertical into the end of the ram platen are fixed to a third level cabinets located in 所述箱体内底设置有与竖向压头一一对应的透气板,在每一所述透气板下方均设有气流通道,所述气流通道的一端通过透气板与箱体内腔贯通,气流通道的另一端贯穿箱体外壁并各自固定连接有管接头; 所述煤样和相似材料沿箱体长度方向间隔布置,并且煤样位于透气板正上方,相似材料位于相邻透气板之间部位的上方; 所述抽采支管与第二水平压头一一相对布置,所述抽采支管插装在箱体侧壁上,在每一抽米支管的内端均开有抽米孔; lc) 检查密封效果; id)连接传感器和电脑;在每一所述气流通道的管接头上通过进气管路各自连接有真空栗,每一所述抽采支管的外端各自连接有出气管路,并在每一所述出气管路均上安装有流量计,将所有的出气管路均与开采总管连通,在所述开采总管上安装有甲烷浓度传感器; 步骤2、加载应力开启应力加载及 The box body is provided with a gas-permeable bottom plate of the vertical ram-one correspondence, under the ventilation plate are each provided with gas flow channels, one end of the air passage through the plate and the housing inner chamber through the gas permeable, gas flow passages the other end of the housing through the outer wall and are each fixedly connected with a pipe joint; the coal and similar material along the longitudinal direction of the housing spaced, coal and gas-permeable plate is located directly above, a similar gas-permeable material is located between adjacent portions of the plate above; and a drainage branch pipe ram eleven opposite second horizontal arrangement, the drainage branch pipe inserted in the housing side walls, at each end of the suction pipe branch meters are meters with an exhaust opening hole; LC) check the sealing effect; ID) and a sensor connected to the computer; on each of said gas flow passage through the pipe joint are each connected to the intake line in vacuo Li, each outer end of the suction pipe branch taken are each connected with an air conduit, and in each of said outlet pipes are mounted on the flow meter, all of the pipes are in communication with the outlet manifold mining, methane concentration sensor is mounted on the manifold with a mining; step 2, open loading stress and stress loading 据采集系统,通过各个压头对型煤施加预定应力; 步骤3、瓦斯吸附关闭出气管路,启动真空栗对煤样进行抽真空排出空气杂质,抽真空完成后关闭真空栗和进气管路,将进气管路与甲烷气瓶连通,打开甲烷气瓶和进气管路进行充气,按照预定的吸附平衡气压对各个煤层进行充分吸附; 步骤4、甲烷驱替关闭甲烷气瓶和进气管路,将进气管路与二氧化碳气瓶连通,按照预定的试验方案打开相应的进气管路和二氧化碳气瓶,对相应煤层进行甲烷驱替; 步骤5、结束一次试验待甲烷浓度传感器读数不再升高时,关闭应力加载及数据采集系统,结束一次试验; 步骤6、同组其他试验按照预定的试验方案,对其他单层或者多层重复相应步骤。 A data acquisition system, by applying a predetermined stress to each ram briquette; step 3, adsorption off gas outlet conduit, pumpdown Li coal samples impurity exhaust air evacuation, and closing the vacuum inlet line Li after evacuation is completed, the cylinder intake line communicates with methane, the methane gas cylinder and open the intake line is inflated, each seam sufficiently adsorbed in a predetermined adsorption equilibrium pressure; step 4, methane flooding closed cylinders and methane inlet line, the intake line communicates with the carbon dioxide gas cylinder, opens the corresponding inlet line and a carbon dioxide gas cylinder according to a predetermined protocol, the corresponding displacement coalbed methane; step 5, the end of a test to be no methane concentration sensor reading rises, Close stress loading and data acquisition system, the end of a test; step 6, with the other test groups, repeat steps corresponding to other single or multi according to a predetermined protocol.
  2. 2. 根据权利要求1所述的多层叠置含气系统C02分层驱替CH4模拟试验方法,其特征在于:所述第二水平压头沿箱体的长度方向均匀布置有四个,所述竖向压头与第二水平压头一一对应布置有四个,所述透气板与竖向压头一一对应布置有四个,所述抽采支管与第二水平压头一一对应布置有四个,所述煤层有四层,从远离第一水平压头的一端开始将煤层依次标定为I、π、m、IV;所述相似材料在煤层之间间隔布置有三层。 The multilayer according to claim 1 comprising stacked gas displacement system stratified C02 CH4 simulation test, characterized in that: said second horizontal ram has four evenly spaced along the length direction of the case, the vertical ram and the second one-horizontal ram arrangement has four, and the ventilation plate are arranged vertical four head correspondence, the drainage branch pipe ram and the second one-horizontal arrangement there are four, the seam has four layers, a first level from an end remote from the ram begins the calibration sequence is I, π, m, IV seam; similar to the three-layer material disposed between the spaced seam.
  3. 3. 根据权利要求2所述的多层叠置含气系统C02分层驱替CH4模拟试验方法,其特征在于:所述箱体内压制成型的型煤大小为400mm*400mm*1050mm。 3. The multilayer laminated claim 2 gas displacement system stratified C02 CH4 simulation test, characterized in that: said box body is press-molded briquette size of 400mm * 400mm * 1050mm.
  4. 4. 根据权利要求3所述的多层叠置含气系统C02分层驱替CH4模拟试验方法,其特征在于:在所述步骤1进行型煤成型时,对型煤沿竖直方向分四次铺设和加压成型,即先在箱体底部相应位置铺设煤样和相似材料,同时在煤样内埋入传感器,然后加压成型;接着进行第二次煤样和相似材料的铺设和加压成型,然后安装抽采支管和传感器;再进行第三次、第四次铺设和加压成型,并埋入相应位置的传感器。 The multilayer stacked according to claim 3 gas displacement system stratified C02 CH4 simulation test, comprising: step 1 when the molded coal, coal in the vertical direction to four times laying and compression molding, i.e. the laying of the first coal and similar materials in the appropriate location of the bottom housing while the sensor is embedded in the coal, and then compression molding; followed by a second and similar coal-like material, laying and pressing forming, and then install the drainage branch pipe and a sensor; then the third, fourth and lay press molding, and embedded in the corresponding position of the sensor.
  5. 5. 根据权利要求4所述的多层叠置含气系统C02分层驱替CH4模拟试验方法,其特征在于:所述传感器包括21个气体压力传感器,21个温度传感器和21个土压力盒;以型煤靠近第一水平压头一端下方的一个角为原点、以型煤的长度方向为Z轴、竖直方向为X轴、与第二水平压头施压相反的方向为Y轴建立坐标系,21个所述温度传感器在Y=100的纵面分上下三排均匀布置,该三排的高度分别为Χ=1〇〇、Χ=200和Χ=300,每一排的7个温度传感器的Ζ轴坐标分别为133、265、395、526、657、788、919;21个气体压力传感器布置在¥ = 200的纵面上, 21个土压力盒布置在Υ = 300的纵面上,气体压力传感器、土压力盒和温度传感器在各自纵面的布置位置相同。 The multilayer laminated to claim 4, wherein the gas displacement system stratified C02 CH4 simulation test, characterized in that: said sensor comprises a gas pressure sensor 21, temperature sensors 21 and 21 earth pressure cell; in a corner near the coal ram end below the first level established as the origin coordinates, the length direction of the Z-axis is coal, the vertical direction is the X axis, the second horizontal direction opposite to the pressing ram as a Y-axis system, the temperature sensor 21 in the longitudinal plane Y = 100 points evenly arranged three rows down, the height of the three rows are Χ = 1〇〇, Χ = 200 and Χ = 300, the temperature of each row 7 Ζ axis coordinate sensor respectively 133,265,395,526,657,788,919; gas pressure sensor 21 disposed in the longitudinal plane ¥ = 200, the earth pressure cell 21 is arranged in a vertical plane Υ = 300 , gas pressure sensor, earth pressure cell and the temperature sensor each arranged in the same position of the longitudinal surface.
  6. 6. 根据权利要求2或3或4或5所述的多层叠置含气系统C02分层驱替CH4模拟试验方法, 其特征在于:步骤1中型煤成型在压制平台上进行,所述压制平台包括长条形的底座,在所述底座上通过四个支撑柱安装有左右两个反力座,所述支撑柱的下端与底座固定,所述反力座的前后两端各自固套在支撑柱上,并且在底座上还固定有竖向的支撑螺杆,在所述支撑螺杆上套装有支撑螺母,所述反力座活套在支撑螺杆上并通过支撑螺母支撑;在所述底座上安装有两根滑轨,所述滑轨位于两个反力座之间,所述试件箱的底部与滑轨配合;在每一所述反力座上均插装有至少两个水平的夹紧杆,所述夹紧杆与反力座螺纹配合,夹紧杆的内端与试件箱侧壁抵紧,夹紧杆的外端固定有手轮。 The multilayer 2 or 3 or 4 or claim 5 stacked layered C02 gas displacement system CH4 simulation test, comprising: step 1 briquette press molding performed on the platform, the platform pressing a base including elongated, on the base by means of four support posts are mounted left and right reaction force seats the lower end of the base support column fixed, the front and rear ends of each seat reaction force in the solid support sleeve column, and also fixed to a support on the base of a vertical screw, the set screw is supported on a support nut, the reaction force on the supporting looper holder and the screw nut is supported by the support; mounted on said base there are two rails, said sliding rail is located between two seats reaction, the bottom of the tank with the specimen slide rail; a reaction force in the seat are each provided with at least two levels of interpolation folders tightening rod, the clamp rod is threadedly engaged with the base reaction force, the inner end of the box side wall and the test piece clamp rod tightly against the outer end of the clamp rod is fixed to the handwheel.
CN 201611123756 2016-12-08 2016-12-08 Simulating test method of CH4 layered displacement by CO2 in multi-layer superposed gas-containing system CN106593369A (en)

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