CN205091004U - Coal petrography goes upward drilling gas parameter's survey system - Google Patents

Abstract

The utility model discloses a measuring system for gas parameters of an upward drilling of coal and rock, which comprises a detecting device, a blocking device and a measuring device. The collection device includes a first pipe body, a second pipe body and a third pipe body, the third pipe body extends into the bottom of the borehole, the first pipe body is located at the outermost side of the borehole, the first pipe body and the second pipe body, the second pipe body Both the second pipe body and the third pipe body are detachably connected. The upper surface of the tail of the third pipe body is evenly spaced with several rows of pipe holes, and cylindrical iron rings are set between adjacent rows of pipe holes. . The measurement system of the utility model mainly solves the problems that the upward drilling in the soft coal rock is easy to collapse and affects the measurement of gas parameters; in addition, because the measurement system uses an electronic device, it can automatically record and store the gas pressure data periodically and transmission, reducing the number of manual data records.

Description

Measuring System of Gas Parameters in Upstream Drilling of Coal and Rock

technical field

The utility model belongs to the technical field of measuring gas parameters of coal and rock upward drilling, and in particular relates to a measuring system for gas parameters of coal and rock upward drilling.

Background technique

Gas pressure and gas content are important parameters to indicate the state of coal seam gas occurrence. It is a key basic parameter in the study of coal and gas outburst, gas gushing, and gas drainage in mines. Therefore, in order to study the law of coal seam gas occurrence and gushing, it is necessary to carry out coal seam gas pressure and gas content. Determination. According to the provisions of the coal industry standard MT/T638-1996 "Direct Measurement Method of Coal Seam Gas Pressure in Underground Coal Mine", the pressure measurement drilling site should be selected in the roadway adjacent to the coal seam, and generally the upward drilling should be drilled in the complete and hard coal rock If the measurement is drilled in soft coal rocks, the drill hole will easily collapse, and the gas measurement hole will be buried, making it impossible to extract gas, resulting in inaccurate measurement of gas parameters and affecting the measurement effect of gas parameters.

However, in the case of complex stratum structures or roadways arranged in soft rock formations, it is necessary to use upward drilling in soft coal rocks for gas extraction measurement, and traditional gas measurement devices cannot effectively solve the problem of soft coal. Problems of gas measurement in rocks.

Utility model content

The purpose of this utility model is to provide a gas parameter measurement system for upward drilling of coal rocks. This system mainly solves the problems that the upward drilling in soft coal rocks is easy to collapse and affects the measurement of gas parameters. In addition, because the measurement system uses The electronic device can automatically record, store and transmit the gas pressure data periodically, reducing the number of manual data recording.

Its technical solutions include:

A system for measuring gas parameters in an upward drilling of coal rocks, which includes a detection device, a plugging device and a measurement device, the detection device is installed in the borehole, and the plugging device is used to seal the drill hole,

The detecting device includes a first pipe body, a second pipe body and a third pipe body, the third pipe body extends into the bottom of the borehole, the first pipe body is located at the outermost side of the borehole, The first pipe body and the second pipe body, the second pipe body and the third pipe body are all detachably connected, and the upper surface of the tail of the third pipe body is provided with a plurality of tube holes evenly spaced, Cylindrical iron rings are set between adjacent rows of pipe holes;

The blocking device includes a blocking capsule, a capsule connecting pipe, and a capsule operating platform. There are several blocking capsules, and each blocking capsule is arranged at intervals and nested in the front and middle of the third pipe body, correspondingly A plugging chamber is formed between the adjacent plugging capsule and the borehole, and the plugging chamber is connected with a plugging operation table through a high-pressure rubber hose, and the plugging operation table is used to provide the blocking liquid to the blocking chamber;

The front part of the first pipe body is connected with the measuring device, and the measuring device is used for measuring gas parameters in the borehole.

As a preferred solution of the present invention, the measuring device includes a gas pressure gauge, an electronic pressure measuring instrument and a gas collection and analysis tank connected in sequence, and the gas pressure gauge is connected to the front of the first pipe body.

As another preferred solution of the present invention, 3 to 6 rows of tube holes are evenly spaced on the upper surface of the tail of the third tube body, and each row of tube holes is provided with 3 tube holes.

Preferably, both ends of the second pipe body are provided with threads, and the first pipe body and the second pipe body, and the second pipe body and the third pipe body are connected by thread fitting.

The connection between the first pipe body and the second pipe body, the second pipe body and the third pipe body is sealed by a built-in rubber gasket and there are two plugging capsules, which are respectively sleeved in front of the third pipe body. Ministry and Central.

Beneficial technical effects brought by the utility model:

Compared with the prior art, the utility model coal and rock upward drilling gas parameter measurement system, on the one hand, the detecting device is composed of a detachable first pipe body, a second pipe body and a third pipe body, and the three-section pipe body Quick disassembly and connection can be realized, and the installation is convenient through threaded connection. The length of the detection device can be selected according to the drilling depth; There are cylindrical iron rings set between adjacent rows of pipe holes, and the third pipe body is installed in the boreholes. The function of the cylindrical iron rings can suppress the collapse of the boreholes and ensure the smooth flow of gas into the pipe holes. Ensure gas extraction effect.

The plugging device is used to seal the borehole, plug the fissures of soft coal and rock, prevent gas from escaping from the fissures, and affect the measurement of gas parameters.

The utility model combines the detection device and the plugging device, and then selects the measuring device to measure the gas parameters, which can better overcome the influence of the traditional soft coal rock upward drilling that is easy to collapse on the gas parameter measurement, and is especially suitable for soft coal The determination of gas parameters in the upward drilling of rocks ensures the gas drainage of soft coal rocks and the accurate determination of gas parameters.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is the structure schematic diagram of the gas parameter measuring system of the coal rock upward drilling of the utility model;

Fig. 2 is a drilling construction diagram in the gas parameter measurement system for coal and rock upward drilling;

Fig. 3 is a schematic diagram of the structure of the detection device in the gas parameter measurement system for coal and rock uphole drilling;

Fig. 4 is a schematic diagram of the partial structure of the plugging device in the gas parameter measurement system for coal and rock uphole drilling;

In the figure, 1. drilling, 2. third pipe body, 3. plugging capsule, 4. second pipe body, 5. plugging chamber, 6. plugging liquid, 7. capsule connecting pipe, 8. high-pressure hose , 9. Capsule operating table, 10. Blocking operating table, 11. Switch, 12. Gas pressure gauge, 13. Electronic pressure measuring instrument, 14. Gas collection and analysis tank, 15. Cylindrical iron ring, 16. Tube hole, 17 , Built-in rubber gasket, 18, the first pipe body, 19, drilling rig, 20, concrete sealing material, 21, coal seam.

detailed description

The utility model is further clearly and completely described below in conjunction with specific embodiments.

The utility model gas parameter measurement system for upward drilling of coal rocks, as shown in Fig. 1 and Fig. 2, mainly includes a detection device, a plugging device and a measurement device.

The detection device includes a first pipe body 18, a second pipe body 4 and a third pipe body 2 connected in sequence, wherein the third pipe body 2 extends into the bottom of the borehole 1, and the first pipe body 18 is located at the bottom of the borehole 1 Outermost, the first pipe body 18 can be the drilling rod etc. in the prior art, and the two ends of the second pipe body 4 are provided with threads, and its two ends are respectively matched with the structure in the first pipe body and the third pipe body, Quick and detachable connection can be realized, as shown in Figure 3 and Figure 4, in order to connect more closely, it can be preferably at the connection between the first pipe body 18 and the second pipe body 4, the second pipe body 4 and the third pipe body 2 Sealed by the built-in rubber gasket 17, the detachable connection of the first pipe body, the second pipe body and the third pipe body can meet the needs of different depths of drilling in the actual measurement process, such as the case of deep drilling , you can choose to replace the longer second tube body, which can be increased or decreased as appropriate.

At the afterbody of the above-mentioned third pipe body, several tube holes 16 are evenly spaced along the length direction. The utility model is preferably provided with 4 rows. The tube holes 16 of this number can meet the measurement requirements of the utility model. A cylindrical iron ring 15 is sleeved between the pipe holes, and the cylindrical iron ring is a solid structure that can prevent the borehole from collapsing. Each row of pipe holes is preferably 3, and the cylindrical iron ring separates the pipe holes of adjacent rows, and will not Block the tube hole.

The plugging device includes a plugging capsule 3, a capsule connecting pipe 7, a capsule operation table 9, a plugging operation table 10 and a high-pressure rubber hose 8, and a plurality of plugging capsules can be provided according to the actual situation, or according to the third pipe body and the drill The depth of the hole is set. The utility model preferably has two plugging capsules, and the two plugging capsules are sequentially placed in the front and middle of the third pipe body at intervals. The two plugging capsules are connected to the capsule operating table through the capsule connecting pipe 7 10 connection, through the capsule operating table 10 to inject the plugging fluid 6 into the plugging capsule, the plugging chamber 5 is formed between the two plugging capsules 3 filled with the plugging fluid and the drilled hole, and the plugging chamber 5 passes through the high-pressure rubber hose 8 It is connected with the plugging operation platform 10, and the plugging fluid 6 is provided into the blocking chamber 5 through the plugging operation table 10.

The structures of the capsule operation console 9 and the plugging operation console 10 for providing the plugging fluid above can adopt the structures in the prior art, and will not be described in detail here.

The measurement device includes a switch 11, a gas pressure gauge 12, an electronic pressure measuring instrument 13 and a gas collection and analysis tank 14, wherein the gas pressure gauge 12 is connected to the first pipe body, and the switch 11 is used to control the opening and closing of the gas flow. The pressure gauge 12 is a mechanical pressure gauge for detecting gas pressure. The electronic pressure measuring instrument 13 can be connected to a computer to obtain the monitored real-time gas pressure data, form electronic data, and monitor and correct each other with the gas pressure gauge 12 .

The pressure of the plugging fluid 6 input by the capsule operating platform 9 to the plugging capsule 3 should be greater than the gas pressure and the pressure of the plugging fluid 6 in the plugging chamber 5 .

The concrete assay method of above-mentioned assay system specifically comprises the following steps:

(1) Drilling: use a conventional coal mine drilling rig 19 to drill an upward borehole to the coal seam 21 in the coal rock roadway, and the hole depth reaches the coal seam;

(2) Install the gas detection device: clean up the debris in the borehole 1, install the third pipe body 2 in the borehole 1, quickly connect the third pipe body 2 and the second pipe body 4 through threads, and use the drilling rig 19 and the first pipe body 18 deliver it to the deep part of the borehole 1;

(3) Sealing the borehole: first, the plugging capsule 3 is connected to the plugging console 10 through the high-pressure rubber hose 8, and the plugging fluid is injected into the plugging capsule 3 through the plugging console 10. When the plugging liquid reaches a certain amount, it expands and forms a plugging chamber with the drilled hole. Then the plugging chamber is connected to the plugging operation table through a high-pressure rubber hose, and the plugging liquid is supplied to the plugging chamber through the plugging operation table. The pressure of the plugging fluid in the plugging capsule is slightly higher than the gas pressure and the pressure of the plugging fluid in the plugging chamber, and finally the remaining part is sealed with concrete plugging material 20;

(4) Pressure test: After the sealing is completed, do a pressure test to check the sealing effect. If the sealing is unqualified, you need to re-seal the hole;

(5) Measuring gas parameters: After the withstand voltage test is completed, measure the gas parameters, that is, turn on the switch, and read the reading of the pressure gauge 12 after the pressure gauge 12 is stable. The reading of the pressure gauge 12 shows the value of the gas pressure in the sealed hole. The electronic pressure measuring instrument 13 periodically records, stores, and transmits the gas pressure value, and finally collects the gas into the gas collection and analysis tank 14 for component and content analysis.

The parts not mentioned above can be realized by adopting or referring to existing technologies.

The above-mentioned embodiment is only an illustration of the utility model, but not a limitation. The length of the plugging capsule and the measured borehole of each pipe body can be changed according to the actual situation on site. Those skilled in the art, under the inspiration of the utility model, The obtained detachably connected other pipe bodies should also fall within the protection scope of the present utility model.

Claims (4)

1. A measurement system for coal and rock upward drilling gas parameters, which includes a detection device, a plugging device and a measurement device, the detection device is installed in the borehole, and the plugging device is used to seal the Said borehole is characterized in that: The detecting device includes a first pipe body, a second pipe body and a third pipe body, the third pipe body extends into the bottom of the borehole, the first pipe body is located at the outermost side of the borehole, The first pipe body and the second pipe body, the second pipe body and the third pipe body are all detachably connected, and the upper surface of the tail of the third pipe body is provided with a plurality of tube holes evenly spaced, Cylindrical iron rings are set between adjacent rows of pipe holes; The blocking device includes a blocking capsule, a capsule connecting pipe, and a capsule operating platform. There are several blocking capsules, and each blocking capsule is arranged at intervals and nested in the front and middle of the third pipe body, correspondingly A plugging chamber is formed between the adjacent plugging capsule and the borehole, and the plugging chamber is connected with a plugging operation table through a high-pressure rubber hose, and the plugging operation table is used to provide the blocking liquid to the blocking chamber; The front part of the first pipe body is connected with the measuring device, and the measuring device is used for measuring gas parameters in the borehole. 2. The measuring system for gas parameters of upward drilling of coal and rock according to claim 1, characterized in that: said measuring device comprises a gas pressure gauge, an electronic pressure measuring instrument and a gas collection and analysis tank connected in sequence, and said gas pressure The table is connected to the front of the first pipe body. 3. The system for measuring gas parameters in upward drilling of coal and rock according to claim 1, characterized in that: the upper surface of the tail of the third pipe body is evenly spaced with 3 to 6 rows of pipe holes, and each row There are 3 tube holes. 4. The system for measuring gas parameters in upward drilling of coal and rock according to claim 1, characterized in that: both ends of the second pipe body are provided with threads, and the first pipe body and the second pipe body, The second pipe body and the third pipe body are connected through thread fitting.