阅读说明：本技术 采空区气体检测方法及装置 (Goaf gas detection method and device ) 是由 白光星 贾明铄 李金亮 彭鹏 丁超 张兴栋 王文涛 于 2021-06-24 设计创作，主要内容包括：本发明涉及一种采空区气体检测方法及装置,属于煤矿监测技术领域。本发明可方便快捷的检测采空区气体,使采空区气体检测更加及时、准确、便捷,同时降低检测成本,确保矿井安全生产。本发明包括以下步骤：(a)选取检测点,在工作面回风巷与采空区交界隔离处外侧设定采样检测点；(b)插管,自采样检测点向采空区内待测区插入一中空管体；(c)取气样检测,通过管体抽取采空区内待测区气体,并通过集气罩汇集后接入气体检测仪。本发明所述的采空区气体检测装置包括：管体,其一端设有进气口,另一端设有出气口；采样泵,其进气端与管体的出气口连通；以及气体检测仪,其检测端密闭连接集气罩；所述采样泵的排气端与所述集气罩连通。(The invention relates to a goaf gas detection method and device, and belongs to the technical field of coal mine monitoring. The invention can conveniently and rapidly detect the gas in the goaf, so that the gas detection in the goaf is more timely, accurate and convenient, the detection cost is reduced, and the safe production of a mine is ensured. The invention comprises the following steps: (a) selecting a detection point, and setting a sampling detection point at the outer side of the junction isolation of the working face return airway and the goaf; (b) the pipe inserting device comprises a pipe inserting device and a pipe pushing device, wherein a hollow pipe body is inserted from a sampling detection point to a region to be detected in a goaf; (c) and (4) gas sampling detection, namely extracting gas in a region to be detected in the goaf through the pipe body, collecting the gas through the gas collecting hood and then accessing the gas into a gas detector. The goaf gas detection device provided by the invention comprises: a pipe body, one end of which is provided with an air inlet and the other end is provided with an air outlet; the gas inlet end of the sampling pump is communicated with the gas outlet of the tube body; the detection end of the gas detector is hermetically connected with the gas-collecting hood; and the exhaust end of the sampling pump is communicated with the gas collecting hood.)

1. A goaf gas detection method is characterized by comprising the following steps:

(a) selecting a detection point, and setting a sampling detection point at the outer side of the junction isolation of the working face return airway and the goaf;

(b) the pipe inserting device comprises a pipe inserting device and a pipe pushing device, wherein a hollow pipe body is inserted from a sampling detection point to a region to be detected in a goaf;

(c) and (4) gas sampling detection, namely extracting gas in a region to be detected in the goaf through the pipe body, collecting the gas through the gas collecting hood and then accessing the gas into a gas detector.

2. The goaf gas detection method of claim 1, wherein:

in the step (b), the length of the pipe body penetrating into the goaf is 3-6 meters.

3. The goaf gas detection method of claim 1 or 2, characterized in that:

in the step (a), the sampling detection point is 1-2 m away from the junction isolation position of the return airway and the goaf of the working face, and a pipe support is arranged at the sampling detection point and used for supporting the pipe body to swing in the horizontal and vertical directions.

4. A goaf gas detection method in accordance with claim 3, wherein: when the area to be measured in the goaf is the top plate high-falling area, a gap of 20-30 cm is reserved between the sampling end of the pipe body and the top plate high-falling area.

5. A goaf gas detection apparatus for implementing the method of claim 1, comprising:

a pipe body (1) with an air inlet at one end and an air outlet at the other end;

the gas inlet end of the sampling pump (2) is communicated with the gas outlet of the tube body;

the gas detector (3) is connected with the gas collecting hood (4) in a sealing way at the detection end;

and the exhaust end of the sampling pump (2) is communicated with the gas collecting hood (4).

6. A goaf gas detection apparatus in accordance with claim 5 wherein: still include fixed plate (5), body (1), sampling pump (2), gas detection appearance (3) all with fixed plate (5) fixed connection.

7. A goaf gas detection apparatus as claimed in claim 5 or 6, wherein: the pipe body (1) is a telescopic rod with a hollow rod body.

8. A gob gas detection apparatus according to claim 7, wherein: the pipe body (1) is provided with a handle part (6).

9. The goaf gas detection apparatus of claim 6, wherein: also comprises a shoulder belt (7) connected with the pipe body (1) or the fixing plate (5).

Technical Field

The invention relates to a goaf gas detection method and device, and belongs to the technical field of coal mine monitoring.

Background

In the stoping process of a working face, the gas composition and concentration of a flammable area of a goaf are very important for safe production, and because personnel in the goaf cannot enter the goaf, the fire monitoring of the goaf at the present stage mainly comprises the following two methods:

1. the method comprises the steps of extracting goaf gas by pre-embedding a bundle pipe in the goaf, conveying the goaf gas to a gas analyzer through the bundle pipe for gas component and concentration analysis, and judging whether fire hazard exists or not, wherein the gas analyzer can be placed in an aboveground laboratory or an underground chamber;

2. and the manner of reserving the sensor is to place an explosion-proof or intrinsic safety type gas sensing instrument in the goaf in advance for gas index analysis, and the analysis result can be transmitted to ground management personnel through wireless or optical fiber.

Both of these methods have certain disadvantages in the practical process:

(1) the gas analyzer on the well has long monitoring period due to the long distance of the beam tube, and can not monitor the gas change condition of the goaf in time.

(2) The underground gas analyzer has high price and high system cost due to explosion-proof requirements;

(3) the mode of reserving the sensor is that the data cable is broken and destroyed because of the collapse of the coal rock, so that the data cable is mostly in wireless transmission, the transmission distance is short under the burying state of the collapse coal rock in the goaf of the coal mine working face, and the signal can not be received quickly along with the advance of the working face.

Disclosure of Invention

The invention aims to provide a goaf gas detection method which can conveniently and quickly detect gas in a goaf; correspondingly, the invention provides the goaf gas detection device, so that the goaf gas detection is more timely, accurate and convenient, the detection cost is reduced, and the safe production of a mine is ensured.

The goaf gas detection method provided by the invention comprises the following steps:

(a) selecting a detection point, and setting a sampling detection point at the outer side of the junction isolation of the working face return airway and the goaf;

(b) the pipe inserting device comprises a pipe inserting device and a pipe pushing device, wherein a hollow pipe body is inserted from a sampling detection point to a region to be detected in a goaf;

(c) and (4) gas sampling detection, namely extracting gas in a region to be detected in the goaf through the pipe body, collecting the gas through the gas collecting hood and then accessing the gas into a gas detector.

The tube body can be connected with a sampling pump and used for extracting gas in a region to be detected in the goaf, the exhaust end of the sampling pump is connected into a gas collecting hood, and the gas collecting hood is hermetically connected to the sampling end of a gas detector. When the tube body is placed and completed, the sampling pump is started, and gas in the region to be detected in the goaf can directly reach the gas detector through the tube body, the sampling pump and the gas collecting hood, so that the rapid detection of the gas sample is realized.

Preferably, in the step (b), the length of the pipe body penetrating into the goaf is 3-6 m.

The pipe body can detect the positions of corners of the goaf, the air return area of the goaf, the top plate high-emission area and the like.

Preferably, the distance between the sampling detection point and the boundary isolation position of the working face return airway and the goaf is 1-2 m, and a pipe support is arranged at the sampling detection point and used for supporting the pipe body to swing in the horizontal and vertical directions.

The sampling detection point is selected at the advance support end of the return airway, float coal or suspended ceiling of surrounding coal rock layers is processed, sampling safety is guaranteed, the pipe support can be in a top plate suspension type or a support type, and the pipe body can swing in the horizontal and vertical directions around the pipe support, so that the sampling end of the pipe body can reach different positions.

Preferably, when the area to be detected in the goaf is the top plate high-emission area, a gap of 20-30 cm is reserved between the sampling end of the pipe body and the top plate high-emission area.

Survey body sampling end and roof height through the entry of intubate and emit the district interval, reserve and establish the interval and can prevent that the sampling opening from inserting in the roof height emits the district, lead to the gangue to get into the body along the mouth of pipe.

The goaf gas detection device provided by the invention comprises: a pipe body, one end of which is provided with an air inlet and the other end is provided with an air outlet; the gas inlet end of the sampling pump is communicated with the gas outlet of the tube body; the detection end of the gas detector is hermetically connected with the gas-collecting hood; and the exhaust end of the sampling pump is communicated with the gas collecting hood.

The pipe body is used as a pipeline for conveying gas in the goaf, a check valve can be arranged at the front end in the pipe body, only gas in the goaf is allowed to be pumped in by the gas inlet under the action of the sampling pump, during work, the gas in the goaf sequentially enters the pipe body under the action of the sampling pump and reaches the gas collecting hood by the sampling pump, then the gas sampled by the gas detector is detected, and the gas detector can adopt a CD4 multi-parameter gas sensor monitor.

Preferably, still include the fixed plate, body, sampling pump, gas detection appearance all with fixed plate fixed connection.

Preferably, the pipe body is a telescopic rod with a hollow rod body.

But the telescopic link comprises the cavity body of rod of suit in proper order, and each body of rod junction accessible sealing washer be airtight connection, prevent that the accuracy that the outside gas influences the detection by in the junction entering tube.

Preferably, a handle part is arranged on the tube body.

The operation personnel can hold the utility model conveniently.

Preferably, the device further comprises a shoulder strap connected to the tube body or the fixing plate.

The operation personnel can conveniently lean against the shoulder.

The invention has the beneficial effects that: the goaf gas detection method is provided, and goaf gas can be conveniently and rapidly detected; correspondingly, the invention provides a goaf gas detection device, which changes the original detection mode by arranging a pipe body, a sampling pump and a gas detector, so that the goaf gas detection is more timely and accurate, the detection cost is reduced, and the safe production of a mine is ensured.

Drawings

FIG. 1 is a schematic diagram of a goaf corner and return air zone detection method;

FIG. 2 is a schematic diagram of a detection method of a roof head region in a gob;

FIG. 3 is a schematic structural diagram of an embodiment;

in the figure: 1. a pipe body; 2. a sampling pump; 3. a gas detector; 4. a gas-collecting hood; 5. a fixing plate; 6. a handle portion; 7. shoulder straps; 8. an air inlet pipe; 9, an air outlet pipe; 10, a pipe support; 11 goaf.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1 and 2, the goaf gas detection method provided by the invention comprises the following steps:

(a) selecting a detection point, setting a sampling detection point at the outer side of the junction isolation part of the working face return airway and the goaf, wherein the distance between the sampling detection point and the junction isolation part of the working face return airway and the goaf is 1-2 m, and arranging a pipe support at the sampling detection point for supporting the horizontal and vertical swinging of the pipe body;

(b) inserting a hollow pipe body into a region to be detected in the goaf from a sampling detection point, wherein the length of the pipe body penetrating into the goaf is 3-6 m, and when the region to be detected is a top plate high-emission region, a gap of 20-30 cm is reserved between a sampling end of the pipe body and the top plate high-emission region;

(c) and (4) gas sampling detection, namely extracting gas in a region to be detected in the goaf through the pipe body, collecting the gas through the gas collecting hood and then accessing the gas into a gas detector.

In the implementation method, the pipe body can detect the positions of the corners of the goaf, the air return area of the goaf, the top plate high-emission area and the like. Specifically, the pipe body can be connected with a sampling pump and used for extracting gas in a region to be detected in the goaf, the exhaust end of the sampling pump is connected into a gas collecting hood, and the gas collecting hood is hermetically connected to the sampling end of a gas detector. When the tube body is placed and completed, the sampling pump is started, and gas in the region to be detected in the goaf can directly reach the gas detector through the tube body, the sampling pump and the gas collecting hood, so that the rapid detection of the gas sample is realized. The sampling detection point is selected at the advance support end of the return airway, float coal or suspended roof of surrounding coal rock layers is processed, sampling safety is guaranteed, the pipe support can be in a top plate suspension type or a support type, and the pipe body can swing in the horizontal and vertical directions around the pipe support. Survey body sampling end and roof height through the entry of intubate and emit the district interval, reserve and establish the interval and can prevent that the sampling opening from inserting in the roof height emits the district, lead to the gangue to get into the body along the mouth of pipe.

The goaf gas detection device provided by the invention comprises: a pipe body 1, one end of which is provided with an air inlet and the other end is provided with an air outlet; the air inlet end of the sampling pump 2 is communicated with the air outlet of the tube body; the gas detector 3 is connected with the gas collecting hood 4 in a sealing way at the detection end; the exhaust end of the sampling pump 2 is communicated with the gas-collecting hood 4. The tube body 1, the sampling pump 2 and the gas detector 3 are fixedly connected with the fixing plate 5. The pipe body 1 is a telescopic rod with a hollow rod body. The pipe body 1 is provided with a handle part 6. The shoulder belt 7 is arranged on the pipe body 1 or the fixing plate 5.

In this embodiment, scalable pole comprises the cavity body of rod of suit in proper order, and each body of rod junction accessible sealing connection prevents that the outside gas from getting into the pipe body by the junction, influencing the accuracy that detects. The air inlet end of the sampling pump 2 is connected with the air outlet of the tube body 1 through an air inlet tube 7, and the air outlet end of the sampling pump 2 is connected with the gas-collecting hood 4 through an air outlet tube 9. But the telescopic link uses as the gaseous pipeline of conveying in collecting space area, and the front end sets up the check valve in the telescopic link, only allows collecting space area gas to be by the air inlet suction under the effect of sampling pump 2, and handle portion 6 and baldric 7 make things convenient for operating personnel to hold and shoulder to take and lean on. The gas detector 3 may employ a CD4 multiparameter gas sensor monitor.

During the use, set for the sampling check point in face return airway and collecting space boundary isolation department one side 1 meter department, but launch telescopic link, but with the telescopic link body of rod arm on the conduit saddle of sampling check point for but support telescopic link, then with the one end of telescopic link deep into the collecting space, start the sampling pump, collecting space gas gets into in proper order the body under the sampling pump effect, the sampling pump reachs the gas collecting channel in, then detects the gas of sampling by gas detector.

Of course, the foregoing is only a preferred embodiment of the invention and should not be taken as limiting the scope of the embodiments of the invention. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.