CN103161447B - A kind of method utilizing directional drilling to carry out concordant pressure measurement - Google Patents
A kind of method utilizing directional drilling to carry out concordant pressure measurement Download PDFInfo
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- CN103161447B CN103161447B CN201310079345.6A CN201310079345A CN103161447B CN 103161447 B CN103161447 B CN 103161447B CN 201310079345 A CN201310079345 A CN 201310079345A CN 103161447 B CN103161447 B CN 103161447B
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Abstract
A kind of method utilizing directional drilling to carry out concordant pressure measurement, by using directional drilling machine construction drill in Seam Roof And Floor rock stratum in coal road, directional drilling machine drilling direction is changed after reaching certain depth, drill bit is crept into direction, coal seam, and make boring through coal seam, after construction hole to be drilled terminates, injection hole sealing also carries out pressure measurement at aperture setting pressure table.Overcome pressure measurement place in layer-through drilling pressure testing method in limitation and the concordant boring pressure testing method of rock gangway easily bit freezing, collapse hole, become that porosity is low, workload large, the easy shortcoming such as spray orifice and sealing of hole weak effect, be applicable to measure coal-bed gas pressure in coal road, have into that porosity is high, good airproof performance, do not destroy the advantages such as coal bed texture.
Description
Technical field
The present invention relates to a kind of method for measuring gas pressure of coal bed, especially a kind of being applicable to utilizes directional drilling to carry out the method for concordant pressure measurement in coal road.
Background technology
The gas pressure in coal seam is one of mine gas basic parameter, and it carries out Mine Gas Gushing improvement for determining coal seam gas-bearing capacity, and the equal tools of work such as the control of gas drainage under suction and coal and gas prominent are of great significance.
At present, modal coal-bed gas pressure Direct Determination is layer-through drilling pressure measurement and concordant boring pressure measurement.Layer-through drilling pressure measurement is the pressure testing method to coal seam construction drill in roof or floor roadway, but it can only measure the gas pressure in coal seam near rock gangway, limits the selection in pressure measurement place.Concordant boring pressure measurement is the pressure testing method to coal seam construction drill in coal road, owing to constructing in coal seam, the phenomenon such as bit freezing, collapse hole is easily there is when coal is softer, become porosity low, workload is large, and may occur spray orifice phenomenon during coal-bed gas pressure height, there is potential safety hazard, and sealing of hole weak effect, pressure measurement is inaccurate.
Summary of the invention
Technical problem: the object of the invention is to overcome Problems existing in prior art, provide a kind of become high, the good airproof performance of porosity, do not destroy coal bed texture, safely and efficiently gas pressure measurement method.
Technical scheme: a kind of method utilizing directional drilling to carry out concordant pressure measurement of the present invention, comprises the steps:
A., in coal road, directional drilling machine is first used in rock stratum along becoming the direction of angle to creep into a straight hole with coal seam;
B. stop creeping into after straight hole that directional drilling machine bores reaches set depth, change directional drilling machine drill bit drilling direction, creep into curved hole to direction, coal seam, and make curved hole through coal seam 1 ~ 2m;
C. in straight hole section, piezometer tube is installed, then cement mortar sealing of hole is carried out to straight hole;
D. after sealing of hole terminates, at piezometer tube termination setting pressure table.
The angle in described straight hole and coal seam is 5 ~ 15 °; The set depth of described straight hole is 50 ~ 60m; The length of described piezometer tube is equal with the length of straight hole; The sealing of hole segment length of described straight hole is slightly shorter than the length of straight hole; Described rock stratum is floor strata or the roof strata in coal seam.
Beneficial effect: owing to have employed technique scheme, instant invention overcomes pressure measurement place in layer-through drilling pressure testing method in limitation and the concordant boring pressure testing method of rock gangway easily bit freezing, collapse hole, become that porosity is low, workload large, the easy shortcoming such as spray orifice and sealing of hole weak effect, reduce workload, improve Completion of Drilling Hole rate, ensure that the accuracy of construction safety and gas pressure measurement.Have into that porosity is high, good airproof performance, do not destroy the advantages such as coal bed texture.Its method is simple, easily constructs, and pressure measurement is accurate, has practicality widely.
Accompanying drawing explanation
Fig. 1 is embodiments of the invention one position views;
Fig. 2 is directional drilling structure for amplifying schematic diagram in Fig. 1;
Fig. 3 is embodiments of the invention two position views;
Fig. 4 is directional drilling structure for amplifying schematic diagram in Fig. 3.
In figure: 1-coal seam; 2-coal road; 3-straight hole; 4-curved hole; 51-floor strata; 52-roof strata; 6-piezometer tube; 7-pressure meter.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are further described:
Embodiment one,
As depicted in figs. 1 and 2, the method utilizing directional drilling to carry out concordant pressure measurement of the present invention, first in the floor strata 51 of coal road 2, use the direction that directional drilling machine edge and 1 one-tenth, coal seam angle are 5 ~ 15 ° to creep into a straight hole 3, stop creeping into after the degree of depth L of straight hole 3 reaches 50 ~ 60m, then change the drilling direction of directional drilling machine drill bit, creep into curved hole 4 to direction, coal seam 1, and make curved hole 4 through coal seam 1, curved hole 4 is 1 ~ 2m through the distance in coal seam 1, completes drilling construction; Then in straight hole 3, install a piezometer tube 6, the length of piezometer tube 6 is equal with the length of straight hole 3, and then carry out cement mortar sealing of hole to straight hole 3, sealing of hole segment length is slightly shorter than the length of straight hole 3; After sealing of hole terminates, at piezometer tube 6 termination setting pressure table 7, determination of coal seam gas pressure can be carried out.
Embodiment two,
As shown in Figure 3 and Figure 4, the method utilizing directional drilling to carry out concordant pressure measurement of the present invention, first in the roof strata 52 of coal road 2, use the direction that directional drilling machine edge and 1 one-tenth, coal seam angle are 5 ~ 15 ° to creep into a straight hole 3, stop creeping into after the degree of depth L of straight hole 3 reaches 50 ~ 60m, then change the drilling direction of directional drilling machine drill bit, creep into curved hole 4 to direction, coal seam 1, and make curved hole 4 through coal seam 1, curved hole 4 is 1 ~ 2m through the distance in coal seam 1, completes drilling construction; Then in straight hole 3, install a piezometer tube 6, the length of piezometer tube 6 is equal with the length of straight hole 3, and then carry out cement mortar sealing of hole to straight hole 3, sealing of hole segment length is slightly shorter than the length of straight hole 3; After sealing of hole terminates, at piezometer tube 6 termination setting pressure table 7, determination of coal seam gas pressure can be carried out.
Claims (1)
1. utilize directional drilling to carry out a method for concordant pressure measurement, it is characterized in that comprising the steps:
A., in coal road (2), directional drilling machine is first used in rock stratum along becoming the direction of angle to creep into a straight hole (3) with coal seam (1); Described straight hole (3) is 5 ~ 15 ° with the angle in coal seam (1);
B. stop creeping into after straight hole that directional drilling machine bores (3) reaches set depth, change directional drilling machine drill bit drilling direction, creep into curved hole (4) to coal seam (1) direction, and make curved hole (4) through coal seam (1) 1 ~ 2m, complete drilling construction; The set depth of described straight hole (3) is 50 ~ 60m;
C. install piezometer tube (6) in straight hole (3) section, the length of piezometer tube (6) is equal with the length of straight hole (3), and then carry out cement mortar sealing of hole to straight hole (3), sealing of hole segment length is slightly shorter than the length of straight hole (3);
D. after sealing of hole terminates, in piezometer tube (6) termination setting pressure table (7), determination of coal seam gas pressure can be carried out.
2. the method utilizing directional drilling to carry out concordant pressure measurement according to claim 1, is characterized in that: described rock stratum is floor strata (51) or the roof strata (52) of coal seam (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310079345.6A CN103161447B (en) | 2013-03-12 | 2013-03-12 | A kind of method utilizing directional drilling to carry out concordant pressure measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310079345.6A CN103161447B (en) | 2013-03-12 | 2013-03-12 | A kind of method utilizing directional drilling to carry out concordant pressure measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103161447A CN103161447A (en) | 2013-06-19 |
| CN103161447B true CN103161447B (en) | 2015-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310079345.6A Expired - Fee Related CN103161447B (en) | 2013-03-12 | 2013-03-12 | A kind of method utilizing directional drilling to carry out concordant pressure measurement |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793261A (en) * | 2015-04-07 | 2015-07-22 | 中国矿业大学 | Drilling detection method for coal measure stratum structuring, weak area recognition and stratum inversion |
| CN112343659A (en) * | 2020-08-04 | 2021-02-09 | 煤科集团沈阳研究院有限公司 | Coal rock coal directional cross-layer drilling coal seam gas pressure measuring method |
| CN114352330B (en) * | 2022-03-18 | 2022-06-10 | 应急管理部国家自然灾害防治研究院 | A slip casting strut anchor rope equipment for preventing earthquake is strikeed to tunnel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201206471Y (en) * | 2008-05-23 | 2009-03-11 | 淮南矿业(集团)有限责任公司 | Sealing device for pumping borehole |
| CN102383781B (en) * | 2011-07-15 | 2014-01-08 | 河南理工大学 | Method for measuring gas pressure of coal bed |
| CN102410014B (en) * | 2011-10-31 | 2014-12-03 | 河南理工大学 | Method for testing pressure of gas in water-containing wall rock coal seam |
| CN102661167B (en) * | 2012-05-10 | 2015-01-07 | 中国矿业大学 | Protected seam bottom plate upward comb-shaped drilled hole gas extraction method |
| CN102928571A (en) * | 2012-11-01 | 2013-02-13 | 中国矿业大学 | Method for measuring coal seam gas content directly through downward borehole of pressure ventilation pipe |
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- 2013-03-12 CN CN201310079345.6A patent/CN103161447B/en not_active Expired - Fee Related
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| CN103161447A (en) | 2013-06-19 |
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Inventor after: Wang Liang Inventor after: Guo Haijun Inventor after: Cheng Yuanping Inventor after: Teng Guangping Inventor after: Liu Yaqing Inventor after: Li Xin Inventor after: An Fenghua Inventor before: Teng Guangping Inventor before: Wang Liang Inventor before: Cheng Yuanping Inventor before: Guo Haijun Inventor before: Liu Yaqing Inventor before: Li Xin Inventor before: An Fenghua |
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Free format text: CORRECT: INVENTOR; FROM: TENG GUANGPING WANG LIANG CHENG YUANPING GUO HAIJUN LIU YAQING LI XIN AN FENGHUA TO: WANG LIANG GUO HAIJUN CHENG YUANPING TENG GUANGPING LIU YAQING LI XIN AN FENGHUA |
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Granted publication date: 20151021 Termination date: 20170312 |
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