CN214303922U - Coal face roof strike drilling investigation device - Google Patents
Coal face roof strike drilling investigation device Download PDFInfo
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- CN214303922U CN214303922U CN202120036352.8U CN202120036352U CN214303922U CN 214303922 U CN214303922 U CN 214303922U CN 202120036352 U CN202120036352 U CN 202120036352U CN 214303922 U CN214303922 U CN 214303922U
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Abstract
A coal face roof strike drilling investigation device. The utility model discloses an investigation pipe both ends are through pipe strap and hose fixed connection constitution take out and adopt the pipeline; the inspection pipe is horizontally arranged, and the radial through hole arranged on the upper pipe wall is an inspection hole; a differential pressure measurer or a gas measurer of the investigation device is communicated with the rubber pipe; the L-shaped pitot tube is positioned in the investigation pipe, and the upper end of the vertical pipe of the pitot tube passes through the investigation hole to be communicated with the rubber pipe; the pitot tube is L-shaped, the length of the vertical tube is equal to the inner diameter of the investigation tube, and the length of the horizontal tube is smaller than the diameter of the investigation tube; the axial position of the horizontal pipe is a measuring point, and the flow direction of the mixed gas measured in the pipe is inspected to be opposite to the opening direction of the horizontal pipe. The gas extraction device has the advantages of being reasonable in structural design, convenient to operate, capable of optimizing the design of gas treatment, improving the effect of gas treatment, capable of accurately mastering the gas extraction condition of the top plate of the working face and capable of guaranteeing the safe extraction of the working face.
Description
Technical Field
The utility model relates to a coal face drilling investigation device especially relates to a coal face roof trend drilling investigation device.
Background
The extraction effect of the drill hole for observing the roof strike of the coal face is mainly determined by observing a drill site or an evaluation unit, but the drill site or the evaluation unit comprises dozens or even hundreds of drill holes, the flow and the gas concentration of each point in each drill hole are different, the flow velocity difference of the cross section is very large when the flow velocity is too large, and the gas concentration difference of the cross section is very large when the flow velocity is too slow. At present, the investigation and extraction drill hole is mainly measured by a hole plate flowmeter or an electronic automatic flowmeter, and special equipment is installed for the investigation of a single drill hole, so that the throttling of the drill hole is particularly serious, and can reach about 50% at the highest, therefore, the actual extraction condition of the drill hole cannot be truly reflected, and if the gas extraction condition of a top plate of a working face cannot be accurately mastered in time, the safe extraction of the working face cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
Serious to the drilling throttle in order to overcome that current drilling investigation device exists, can not really reflect the actual condition of taking out of drilling, lead to can not accurately master the working face roof gas and take out the condition, can't ensure the not enough of safe stoping of working face, the utility model provides a coal face roof moves towards drilling investigation device.
The utility model provides a technical scheme that its technical problem adopted is: a coal face roof strike drilling investigation device comprises an investigation pipe, wherein two ends of the investigation pipe are fixedly connected with a hose through pipe clamps to form an extraction pipeline; the investigation pipe is horizontally arranged, and the radial through hole arranged on the pipe wall above the investigation pipe is an investigation hole.
The investigation device also comprises a differential pressure measurer, a gas measurer, a rubber pipe and a pitot tube, wherein the differential pressure measurer or the gas measurer is communicated with the rubber pipe; the L-shaped pitot tube is positioned in the investigation pipe, and the upper end of the vertical pipe of the pitot tube penetrates through the investigation hole to be communicated with the rubber pipe.
The pitot tube is L-shaped, the length of the vertical tube is equal to the inner diameter of the investigation tube, and the length of the horizontal tube is smaller than the diameter of the investigation tube; the axial position of the horizontal pipe is a measuring point, and the flow direction of the mixed gas measured in the pipe is inspected to be opposite to the opening direction of the horizontal pipe.
Furthermore, the scale marks arranged along the axial direction of the vertical pipe divide the axial direction of the vertical pipe into 4 sections or more than 4 sections.
Still further, the vertical pipe is divided equally into 8 sections by the scale in the axial direction, each section is 1 unit, and the vertical pipe is numbered as 1, 2, 3 and … … 8 from top to bottom in sequence.
Further, a radial sealing ring is arranged between the pitot tube and the investigation hole.
Further, the differential pressure measurer is any one of a U-shaped water column differential pressure meter, a mechanical differential pressure meter, an electronic differential pressure meter and a red oil inclination differential pressure meter.
Further, after the investigation operation is completed, the pitot tube is pulled out of the investigation tube, and the sealing cover is mounted in the investigation hole.
The beneficial effects of the utility model are that, structural design is reasonable, and convenient operation optimizes the design that gas was administered, improves gas treatment effect, can accurately master the working face roof gas and take out the emergence of the condition, and the safe stope of guarantee working face avoids causing the emergence of corner gas transfinite accident on the working face when taking over untimely because of the drill site.
Drawings
Fig. 1 is the structure schematic diagram of the coal face roof strike drilling investigation device of the utility model.
Fig. 2 is a schematic diagram of the positions of 2 measuring points in the present invention.
Fig. 3 is a schematic diagram of the positions of 4 measuring points in the present invention.
Fig. 4 is a schematic diagram of 8 measuring point positions in the present invention.
In the figure: 1. the device comprises a differential pressure measurer, a rubber pipe, a pitot tube, a test tube, a radial sealing ring, a scale, a hose, a pipe clamp, a test hole, a sealing cover, a vertical pipe and a horizontal pipe, wherein the test tube is 2, the pitot tube is 3, the test tube is 4, the radial sealing ring is 5, the scale is 6, the hose is 7, the pipe clamp is 8, the test hole is 9, the sealing cover is 10, the vertical pipe is 11, and the horizontal pipe is 12.
Detailed Description
The present invention will be further explained with reference to the drawings and examples. However, it should be understood by those skilled in the art that the present invention is not limited to the specific embodiments shown, and the present invention should be included within the scope of the present invention as long as the spirit of the present invention is met.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "left", "right", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be mechanically coupled, directly coupled, indirectly coupled through an intermediary, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
See figure 1. The utility model discloses a coal face roof strike drilling investigation device, including investigation pipe 4, the both ends of investigation pipe 4 are connected fixedly with hose 7 through pipe strap 8 and are formed into and take out the pipeline; the inspection pipe 4 is horizontally arranged, a radial through hole arranged on the upper pipe wall is an inspection hole 9, the pitot tube 3 is inserted into the inspection pipe 4 from the inspection hole 9 during measurement, and the pitot tube 3 is pulled out from the inspection hole 9 after the measurement is finished.
The investigation device further comprises a differential pressure measurer 1, a gas measurer, a rubber tube 2 and a pitot tube 3, wherein one end of the rubber tube 2 is communicated with the differential pressure measurer 1 or the gas measurer, and the other end of the rubber tube 2 is communicated with the pitot tube 3.
The pitot tube 3 is L-shaped, one end of a horizontal tube 12 of the pitot tube 3 is inserted into the inspection tube 4 from the inspection hole 9 until the horizontal tube falls on the inner tube wall of the inspection tube 4 corresponding to the inspection hole 9. The upper end of the vertical pipe 11 of the pitot tube 3 is communicated with the rubber pipe 2.
The length of the vertical pipe 11 of the L-shaped pitot tube 3 is equal to the inner diameter of the investigation pipe 4; the horizontal tube 12 of the L-shaped pitot tube 3 is shorter in length than the diameter of the investigation tube 4. The axial position of the horizontal pipe 12 is a measuring point, and the flow direction of the measured mixed gas in the inspection pipe 4 is opposite to the opening direction of the horizontal pipe 12.
The scales 6 arranged along the axial direction of the vertical pipe 11 equally divide the axial direction of the vertical pipe 11 into 4 sections or more than 4 sections. Preferably, the scale 6 equally divides the vertical pipe 11 into 8 segments in the axial direction, each segment is 1 unit, and the segments are numbered 1, 2, 3 and … … 8 from top to bottom in sequence.
And a radial sealing ring 5 is arranged between the pitot tube 3 and the investigation hole 9. After the station data is obtained, the pitot tube 3 is extracted from the inspection hole 9, and then the inspection hole 9 is closed by covering the inspection hole 9 with a sealing cap 10.
Further, the differential pressure measuring device 1 is any one of a U-shaped water column differential pressure gauge, a mechanical differential pressure gauge, an electronic differential pressure gauge, and a red oil tilt differential pressure gauge, but is not limited to the above list.
Use the utility model discloses coal face roof trend investigation method of device is surveyed in drilling, its step is as follows:
the investigation method applying the coal face roof strike drilling investigation device comprises the following steps:
A. communicating a differential pressure measurer 1 with a rubber pipe 2, and measuring the rapid pressure H in the extraction pipeline by using the differential pressure measurer 1;
B. removing the differential pressure measurer 1, communicating the gas measurer with the rubber pipe 2, and measuring the gas concentration C in the extraction pipeline;
C. calculating the extraction pure quantity Q of the unit area of the measuring point according to the rapid pressure H and the gas concentration C obtained by the measurement in the step A, B,
Qn＝Vn×1×Cnequation 1
Wherein: v is the flow rate of the gas at the measuring point,
c is the gas concentration of the measuring point,
n is the position of the measuring point, namely: the scale 6 of the intersection of the vertical tube 12 of the pitot tube 3 and the investigation hole 9 of the investigation tube 4;
wherein: v is the flow rate of the gas at the measuring point,
h is the rapid pressure of the measuring point,
n is the position of the measuring point, namely: the vertical tube 12 of the pitot tube 3 and the inspection hole 9 of the inspection tube 4 intersect with a scale 6 (lower corner marks appearing in the following formula are positions of the measuring points),
p is the air density in the extraction pipeline, and p is 1.29;
D. according to the value of the flow velocity V and the value of the gas concentration C in the extraction pipeline, a measuring method of selecting different measuring points is adopted,
when the flow rate in the extraction pipeline is low and the gas concentration is uniformly distributed, a two-point measurement method is adopted; when the flow velocity change in the extraction pipeline is large and the gas concentration distribution is not uniform, a four-point or eight-point measurement method is adopted (see the attached figures 2, 3 and 4). Preferably, the more the flow velocity change in the extraction pipeline is, the more the gas concentration distribution is uneven, the more the number of the measuring points are adopted, and different weights are given according to the number and positions of the measuring points.
Further, the two-point measurement method is as follows:
firstly, inserting a pitot tube into an inspection tube to the bottom, then respectively pulling up to the scales 2 and 6 in sequence, and measuring to obtain the quick pressure H of the measuring points 2 and 62、H6And gas concentration C2、C6；
Then, the extraction pure quantities Q of the measuring points 2 and 6 are respectively calculated2、Q6；
Then, calculating the pure quantity Q of the drilling extraction by a formula 3,
further, the four-point measurement method is as follows:
firstly, inserting the customized pitot tube into the inspection tube to the bottom, then respectively pulling up to the scales 1, 3, 5 and 7 in sequence, and measuring to obtain the quick pressure H of the measuring points 1, 3, 5 and 71、H3、H5、H7And gas concentration C1、C3、C5、C7；
Then, the extraction pure quantities Q of the measuring points 1, 3, 5 and 7 are respectively calculated1、Q3、Q5、Q7；
Then, calculating the pure quantity Q of the drilling extraction by a formula 4,
further, the eight-point measurement method is as follows:
firstly, inserting a pitot tube into an inspection tube to the bottom, then upwards and sequentially pulling the pitot tube to 1-8 units of scales, and measuring to obtain the quick pressure H of 8 measuring points1～H8And gas concentration C1～C8；
Then, respectively calculating the extraction pure quantity Q of 8 measuring points1～Q8；
Then, calculating the pure quantity Q of the drilling extraction by a formula 5,
the utility model discloses also can adopt the measurement station of other different quantities except 2, 4, 8 measurement points according to actual need.
The top plate gradually collapses along with the pushing of the coal face, but cannot be communicated with the goaf immediately; when the caving range of the top plate is continuously enlarged, gas and flow can gradually appear in the new drill hole, the old drill hole is communicated with the goaf to leak gas, and if extraction adjustment is not performed in time, the gas safety of the extraction effect crisis working face is affected. The extraction conditions of all the drill holes are different, and the optimal distance of drill field succession and the height and width of the top plate control are adjusted in time through accurate investigation of each drill hole.
The utility model discloses coal face roof trend drilling investigation device, structural design is reasonable, easy operation, just like surveying haplopore gas concentration survey haplopore gas drainage pure quantity; according to the change conditions of the rapid pressure and the gas concentration in the pipeline, the method with different numbers of measuring points is adopted, the gas extraction purity of each drill hole can be accurately measured, the workload is reduced, the measuring time is effectively saved, and the efficiency is improved.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims.
Claims (6)
1. The utility model provides a coal face roof trend drilling investigation device, is including surveying the pipe, characterized by:
two ends of the investigation pipe are fixedly connected with the hose through a pipe clamp to form an extraction pipeline; the inspection pipe is horizontally arranged, and the radial through hole arranged on the upper pipe wall is an inspection hole;
the investigation device also comprises a differential pressure measurer, a gas measurer, a rubber pipe and a pitot tube, wherein the differential pressure measurer or the gas measurer is communicated with the rubber pipe; the L-shaped pitot tube is positioned in the investigation pipe, and the upper end of the vertical pipe of the pitot tube passes through the investigation hole to be communicated with the rubber pipe;
the pitot tube is L-shaped, the length of the vertical tube is equal to the inner diameter of the investigation tube, and the length of the horizontal tube is smaller than the diameter of the investigation tube; the axial position of the horizontal pipe is a measuring point, and the flow direction of the mixed gas measured in the pipe is inspected to be opposite to the opening direction of the horizontal pipe.
2. The coalface roof strike drilling inspection device of claim 1, wherein: and the scale marks arranged along the axial direction of the vertical pipe divide the axial direction of the vertical pipe into 4 sections or more than 4 sections.
3. The coalface roof strike borehole inspection apparatus of claim 2, wherein: the scale is divided into 8 sections with vertical pipe axial equally, and every section is 1 unit, is numbered 1, 2 from top to bottom in proper order, 3, … … 8.
4. The coalface roof strike drilling inspection device of claim 3, wherein: and a radial sealing ring is arranged between the pitot tube and the investigation hole.
5. The coal face roof strike drilling investigation apparatus of any one of claims 1 to 4, wherein: the differential pressure measurer is any one of a U-shaped water column differential pressure meter, a mechanical differential pressure meter, an electronic differential pressure meter and a red oil inclination differential pressure meter.
6. The coalface roof strike drilling inspection device of claim 5, wherein: when the investigation operation is completed, the pitot tube is pulled out of the investigation tube, and the sealing cover is installed in the investigation hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120036352.8U CN214303922U (en) | 2021-01-07 | 2021-01-07 | Coal face roof strike drilling investigation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120036352.8U CN214303922U (en) | 2021-01-07 | 2021-01-07 | Coal face roof strike drilling investigation device |
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| CN214303922U true CN214303922U (en) | 2021-09-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682091A (en) * | 2021-01-07 | 2021-04-20 | 北京天地华泰矿业管理股份有限公司 | Coal face roof strike drilling investigation device and investigation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682091A (en) * | 2021-01-07 | 2021-04-20 | 北京天地华泰矿业管理股份有限公司 | Coal face roof strike drilling investigation device and investigation method |
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