CN103399125A - Gas drainage drill hole seal test device and gas drainage drill hole seal test method - Google Patents
Gas drainage drill hole seal test device and gas drainage drill hole seal test method Download PDFInfo
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- CN103399125A CN103399125A CN2013103259935A CN201310325993A CN103399125A CN 103399125 A CN103399125 A CN 103399125A CN 2013103259935 A CN2013103259935 A CN 2013103259935A CN 201310325993 A CN201310325993 A CN 201310325993A CN 103399125 A CN103399125 A CN 103399125A
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Abstract
The invention discloses a gas drainage drill hole seal test device and a gas drainage drill hole seal test method. The device comprises a box body for loading a coal sample, wherein a pressure plate which forms a sealed structure with box walls is arranged on the top of the box body; the coal sample in the box body is pressurized by a pressure loading module and the pressure plate; a drilling hole and a gas inlet are respectively formed in the two box walls in the length direction of the box body; the coal sample is drilled through the drilling hole to form a simulated drainage drill hole; a gas drainage pipe with one end being sealed is arranged in the simulated drainage drill hole; the simulated drainage drill hole is sealed by a hole sealing material and the combination of a hole sealing technology; the gas inlet is provided with a gas loading module for filling gas into the coal sample; the drilling hole is provided with a gas monitoring probe. The device can be used for performing similar underground actual drainage drill hole seal tests in an open space on the ground; the hole sealing effects of the hole sealing material and the hole sealing technology can be estimated in detail, and the device is low in cost and can be used repeatedly for tests; the test method is simple to operate.
Description
Technical field
The present invention relates to gas discharge drilling sealing experiment field, relate in particular to a kind of firedamp taking-out discharging drilling sealing of hole sealing experimental facility and method.
Background technology
For high gas or projecting mine, it is very difficult in allowed limits that the method that simple employing is ventilated is controlled the gas density of workplace, must take the gas drainage measure, namely by drilling, utilize boring (or tunnel), pipeline and vacuum pump that the gas in coal seam or goaf is evacuated to ground, effectively solve the back production district gas density problem that transfinites.And gas drainage the key link joint is exactly the firedamp taking-out discharging drilling sealing of hole, and because different mining areas coal seam geological condition is different, sealing material and hole-sealing technology that the extraction drilling and sealing is selected are not quite similar; Sealing material generally all needs to carry out the sealing of hole test before selecting, and experiment meets the demands and just applies afterwards; The experiment that detects the at present sealing material sealing of hole performance test of substantially all drilling in the run of mine coal seam of down-hole, but be limited by the factors such as production, subsurface environment in down-hole, test is not easy to repeatedly carry out, and be difficult for the true cause place of finding sealing of hole to lose efficacy, also can't assess in detail the sealing quality quality and determine reasonable sealed borehole length; How key is the shutoff situation in crack on every side of holing for sealing material and hole-sealing technology sealing of hole effect, and existing surface drilling leakage test, it is not the sealing of hole experiment after drilling under real simulation well, it is simple pipeline that is similar to boring of sealing, with the coal body boring More different that is formed with a large amount of cracks after actual drilling, through the ground experiment effect sealing material preferably of being everlasting, unsatisfactory for effect behind down-hole.Do not have at present a kind of device and method that is specifically designed to extraction borehole sealing experiment under simulation well.
Summary of the invention
The object of the invention is to overcome the defect of prior art, and a kind of new sealing material of check on ground and firedamp taking-out discharging drilling sealing of hole sealing experimental facility and method of hole-sealing technology sealing of hole effect of being applicable to is provided.
For achieving the above object, the present invention is by the following technical solutions:
a kind of firedamp taking-out discharging drilling sealing of hole sealing experimental facility, comprise the casing that loads coal sample, the casing top is placed with the pressing plate that forms hermetically-sealed construction with tank wall, the pressure-loaded module is installed on pressing plate, be coal sample pressurization in casing by pressure-loaded module and pressing plate, be respectively equipped with drill mouth and air intake opening on casing two tank walls along its length, form simulation extraction boring by drilling mouthful to drilling in coal sample, the gas drainage pipe of one end sealing is placed in simulation extraction boring, adopt sealing material and in conjunction with certain hole-sealing technology, simulation extraction boring sealed, be equipped with on air intake opening with this opening and be tightly connected, to the gas-loaded module of inflating in coal sample, drill on mouth the gas-monitoring probe is installed, described gas-monitoring probe is connected with gas detecting instrument.
In described casing coal sample, along simulation extraction boring bearing of trend, plurality of positions is separately installed with the gas-monitoring probe, and each gas-monitoring probe all is connected with gas detecting instrument.
Described pressure-loaded module comprises the compression leg that is connected with pressing plate, and compression leg is connected with pressure testing machine.
Described pressing plate bottom margin is provided with groove, is placed with the O RunddichtringO in groove, makes between pressing plate and tank wall and forms hermetically-sealed construction.
Described gas-loaded module comprises high-pressured air cylinder, and high-pressured air cylinder and air intake opening are tightly connected and inflate in coal sample, and the pressure display unit that detects inner gas pressure is installed on high-pressured air cylinder.
Be 13～26kpa to the air pressure of inflating in coal sample.
A kind of firedamp taking-out discharging drilling sealing of hole sealing experiment method comprises the following steps:
(1) choose the experiment coal sample and be put in experimental provision, by the pressure-loaded module, to coal sample, pressurize, the size of pressurization is determined according to mine terrestrial stress size and is kept pressure stability;
(2) utilize rig to drill mouth to coal sample molding plan extraction boring from tank wall, simulation extraction drilling depth is identical with casing length; Gas drainage pipe is placed in simulation extraction boring adopts sealing material to carry out the shutoff sealing to crack around simulation extraction boring and boring;
(3) utilize the gas-loaded module to be filled with the high pressure gas-monitoring by the casing air intake opening in coal sample, keep inner gas pressure stable, gas-monitoring probe is placed in drill mouthful place and with gas detecting instrument, being connected of casing, if the gas-monitoring probe detects gas-monitoring, illustrate that sealing of hole lost efficacy, need improvement hole-sealing technology and sealing material again to test; , if the gas-monitoring probe does not detect gas-monitoring, illustrate that sealing of hole is respond well.
Be separately installed with the gas-monitoring probe along simulation extraction boring bearing of trend, plurality of positions in described casing coal sample, each gas-monitoring probe all is connected with gas detecting instrument, detects the migration circle of gas by each gas-monitoring probe, determines the sealing of hole segment length.
Be 13～26kpa to inner gas pressure in coal sample.
Described step adds bonding agent in coal sample, with tamping machine,, with the even compacting of coal sample, then by the pressure-loaded module, to coal sample, pressurize.
Compared with prior art, beneficial effect of the present invention is:
Firedamp taking-out discharging drilling sealing of hole sealing experimental facility of the present invention, space that can be open on ground is similar to down-hole actual extraction drilling and sealing sealing experiment, by from simulation extraction boring one end, adopting the gas-loaded module to be filled with gas-monitoring to coal sample, detect whether there is gas-monitoring from the simulation extraction boring other end, can assess in detail the sealing of hole effect of sealing material and hole-sealing technology, and this installation cost is low, experimental technique is simple to operate, and device can be for experiment repeatedly.
Further, be separately installed with the gas-monitoring probe along simulation extraction boring bearing of trend plurality of positions in the casing coal sample, detect the migration circle of gas by each gas-monitoring probe, for determining the down-hole gas sucking releasing sealing of hole, determine that rational sealing of hole segment length provides experimental basis.
Firedamp taking-out discharging drilling sealing of hole sealing experiment method of the present invention, by being formed with the firedamp taking-out discharging drilling in a large amount of cracks after drilling under simulation well, similar to the actual rear coal body boring situation of drilling, react strictly according to the facts the down-hole drilling situation, carry out the gas drainage plugging experiment on ground in conjunction with hole-sealing technology by sealing material, to estimate sealing material and hole-sealing technology sealing of hole effect, can repeated multiple times experiment to determine suitable sealing material and hole-sealing technology, do not affect normal production, can simulate various coal body drilling and sealing situations, practical.
Description of drawings
Fig. 1 is vertical view cutaway drawing of the present invention;
Fig. 2 is main TV structure figure of the present invention;
Fig. 3 is the process flow diagram of test method of the present invention;
In figure: 1-compression leg, 2-pressing plate, 3-high-pressured air cylinder, the 4-gas monitoring instrument, 5-simulation extraction boring, 6-air intake opening, 7-monitors aperture, 8-tank wall, 9-casing, the 10-mouth of drilling, 11-air chamber, 12-gas-monitoring probe, the 13-coal sample, 14-sealing material, 15-O RunddichtringO, the 16-gas drainage pipe, 17-sealing nut, 19-pressure display unit.
Embodiment
The invention will be further described below in conjunction with accompanying drawing:
As depicted in figs. 1 and 2,1 is compression leg, and 2 is pressing plate, compression leg 1 is connected with pressing plate 2, and pressure testing machine is connected with compression leg 2, and pressure testing machine institute applied pressure passes to the interior coal sample of casing 9 by compression leg 1 and pressing plate 2, pressure testing machine, by computer control, is realized controlled loading.Edge at pressing plate 2 is provided with groove, is placed with O RunddichtringO 15 in groove, guarantees pressing plate 2 and tank wall 8 close contacts, reaches sealing effectiveness; The firedamp taking-out discharging drilling module is comprised of simulation extraction boring 5, gas drainage pipe 16, coal sample 13 and sealing material 14, utilize rig to drill and form simulation extraction boring 5 to coal sample 13 by the mouth 10 of drilling on casing one side box wall, simulation extraction boring 5 is adopted certain hole-sealing technology sealing by gas drainage pipe 16 and sealing material 14, with actual extraction drilling and sealing experiment under simulation well;
The gas-loaded module of this device is comprised of the air intake opening 6 on tank wall, pressure display unit 19, high-pressured air cylinder 3, leave one section space as air chamber 11 between simulation extraction boring 5 the inners and air intake opening 6, high-pressured air cylinder 3 gives air chamber 11 inflations by air intake opening 6, air intake opening 6 is sealed by sealing nut 17, pressure display unit 19 is housed on draft tube, can omnidistancely show experimentation air chamber gas-monitoring force value, keeping air chamber gas-monitoring force value is 13～26kpa, and the high pressure gas-monitoring can be along passage migration in crack in coal sample; Monitoring modular is comprised of gas monitoring instrument 4, the monitoring aperture 7 that is opened on tank wall, be placed in coal sample 13 neutralizations mouthful 10 places that drill along simulation extraction boring 5 bearing of trend multipath gas monitoring probes 12 by detecting aperture 7, monitoring aperture 7 is by sealing nut 17 sealings, and whether the monitoring probe of diverse location can detect this place has gas-monitoring to exist; After simulation a period of time, judge the migration circle of gas-monitoring by gas monitoring instrument, when mouthful 10 places that drill detect gas-monitoring, illustrate that sealing material and hole-sealing technology sealing of hole lost efficacy, if mouthful 10 places do not detect gas-monitoring drilling, illustrate that the sealing of hole effect is better, the migration circle of the gas-monitoring that detects by other position monitoring probe, can determine reasonable sealing of hole segment length.
As shown in Figure 3, a kind of firedamp taking-out discharging drilling sealing of hole sealing experiment method specifically comprises the following steps:
(1) choose representational coal sample, with comminutor, coal sample is pulverized;
(2) remove device pressing plate 2, to test coal sample and put into casing 9, coal sample is filled to and monitors aperture 7 when the same level, wherein 5 monitoring probes of gas detecting instrument 4 are placed in coal sample 13 by monitoring aperture 7, wherein the probe position of putting as shown in Figure 1, the monitoring aperture 7 tighten sealing by sealing nut 17, and with tamping machine with the even compacting of coal sample, can add bonding agent in case of necessity in coal;
(3) after coal sample installs compacting, with pressing plate 2, build, by the pressure-loaded module, to coal sample 13, exert pressure, the size of its pressurization is determined according to mine terrestrial stress size, and is kept pressure stability;
(4) coal sample is exerted pressure after a period of stabilisation, utilize rig from mouthful 10 13 moldings plan extraction borings 5 along the device center line to coal sample of drilling, simulation extraction boring 5 degree of depth are identical with casing 9 length;
(5) utilize an end airtight gas drainage pipe 16 and sealing material 14, in conjunction with certain hole-sealing technology, the shutoff sealing is carried out in crack around simulation extraction boring 5 and boring, one section space is left as air chamber 11 in simulation extraction boring 5 the inners;
(6) utilize high-pressured air cylinder 3, be filled with the high pressure gas-monitoring by air intake opening 6 to air chamber 11, can show gas-monitoring pressure in air chamber by pressure display unit 19, keep the gas-monitoring force value in 13～26kpa scope, air intake opening 6 is tightened sealing by sealing nut 17;
(7) gas detecting instrument 4 another gas-monitoring probes 12 are placed in mouthful 10 places that drill, keep the interior gas-monitoring pressure of air chamber 11 basicly stable, regularly by gas detecting instrument 4 each monitoring probes, detect the gas-monitoring migration circle; Mouthful 10 places detect gas-monitoring if drill, and illustrate that sealing material and hole-sealing technology sealing of hole lost efficacy, and need improvement hole-sealing technology and sealing material again to test; If at mouthful 10 places of drilling, gas-monitoring do not detected, illustrate that the sealing of hole effect is better, then the migration circle of the gas-monitoring that detects by other monitoring probe, determine reasonable sealing of hole segment length.
Claims (10)
1. firedamp taking-out discharging drilling sealing of hole sealing experimental facility, it is characterized in that: comprise the casing (9) that loads coal sample (13), casing (9) top is placed with the pressing plate (2) that forms hermetically-sealed construction with tank wall (8), pressing plate is equipped with the pressure-loaded module on (2), be coal sample (13) pressurization in casing (9) by pressure-loaded module and pressing plate (2), be respectively equipped with drill mouthful (10) and an air intake opening (6) on casing (9) two tank walls along its length, mouthful (10) form simulation extraction boring (5) to drilling in coal sample (9) by drilling, the gas drainage pipe (16) of one end sealing is placed in simulation extraction boring (5) and adopts sealing material (14) and in conjunction with certain hole-sealing technology, simulation extraction boring (5) sealed, be equipped with it and be tightly connected on air intake opening (6), to the gas-loaded module of inflating in coal sample, drill on mouthful (10) gas-monitoring probe (12) is installed, described gas-monitoring probe (12) is connected with gas detecting instrument (4).
2. firedamp taking-out discharging drilling sealing of hole sealing experimental facility according to claim 1, it is characterized in that: in described casing (9) coal sample along simulation extraction boring (5) bearing of trend, plurality of positions is separately installed with gas-monitoring probe (12), and each gas-monitoring probe (12) all is connected with gas detecting instrument (4).
3. firedamp taking-out discharging drilling sealing of hole sealing experimental facility according to claim 1 and 2, it is characterized in that: described pressure-loaded module comprises the compression leg (1) that is connected with pressing plate (2), and compression leg (1) is connected with pressure testing machine.
4. firedamp taking-out discharging drilling sealing of hole sealing experimental facility according to claim 1 and 2 is characterized in that: (2) edge, described pressing plate bottom is provided with groove, is placed with O RunddichtringO (15) in groove, makes between pressing plate (2) and tank wall and forms hermetically-sealed construction.
5. firedamp taking-out discharging drilling sealing of hole sealing experimental facility according to claim 1 and 2, it is characterized in that: described gas-loaded module comprises high-pressured air cylinder (3), high-pressured air cylinder (3) is tightly connected and inflates in coal sample with air intake opening (6), and the pressure display unit (19) that detects inner gas pressure is installed on high-pressured air cylinder (3).
6. firedamp taking-out discharging drilling sealing of hole sealing experimental facility according to claim 1 and 2 is characterized in that: to the air pressure of inflating in coal sample, be 13～26kpa.
7. a right to use requires the firedamp taking-out discharging drilling sealing of hole sealing experiment method of 1 experimental provision, it is characterized in that comprising the following steps:
(1) choose the experiment coal sample and be put in experimental provision, by the pressure-loaded module, to coal sample, pressurize, the size of pressurization is determined according to mine terrestrial stress size and is kept pressure stability;
(2) utilize rig to drill mouthful (10) to coal sample (13) molding plan extraction boring (5) from tank wall, simulation extraction boring (5) degree of depth is identical with casing (9) length; Gas drainage pipe (16) is placed in simulation extraction boring (5) adopts sealing material (14) to carry out the shutoff sealing to crack around simulation extraction boring (5) and boring;
(3) utilize the gas-loaded module to be filled with the high pressure gas-monitoring by casing air intake opening (6) in coal sample, keep inner gas pressure stable, with gas-monitoring probe (12) be placed in casing drill mouthful (10) locate and with gas detecting instrument (4), be connected, if gas-monitoring probe (12) detects gas-monitoring, illustrate that sealing of hole lost efficacy, need improvement hole-sealing technology and sealing material again to test; , if gas-monitoring probe (12) does not detect gas-monitoring, illustrate that sealing of hole is respond well.
8. firedamp taking-out discharging drilling sealing of hole sealing experiment method according to claim 7, it is characterized in that: be separately installed with gas-monitoring probe (12) along simulation extraction boring (5) bearing of trend, plurality of positions in described casing (9) coal sample, each gas-monitoring probe (12) all is connected with gas detecting instrument (4), detect the migration circle of gas by each gas-monitoring probe (12), determine the sealing of hole segment length.
9. firedamp taking-out discharging drilling sealing of hole sealing experiment method according to claim 7 is characterized in that: to inner gas pressure in coal sample, be 13～26kpa.
10. firedamp taking-out discharging drilling sealing of hole sealing experiment method according to claim 7, it is characterized in that: described step (1) adds bonding agent in coal sample, with tamping machine,, with the even compacting of coal sample, then by the pressure-loaded module, to coal sample, pressurizes.
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| CN104977143A (en) * | 2015-07-24 | 2015-10-14 | 中国矿业大学(北京) | Gas drainage drilling tightness detection device |
| CN105606773A (en) * | 2016-02-19 | 2016-05-25 | 龙岩学院 | Device for testing performance of mining hole sealing material and using method thereof |
| CN106761572A (en) * | 2016-11-22 | 2017-05-31 | 西安科技大学 | A kind of Multi-functional analog boring test platform and its application method |
| CN107558990A (en) * | 2017-08-17 | 2018-01-09 | 重庆大学 | A kind of high methane cherry coal drilling production quantity of slag and the test device of drilling deformation |
| CN109030054A (en) * | 2018-08-17 | 2018-12-18 | 西安科技大学 | This coal seam directional drilling process simulation experimental rig of one kind and method |
| CN110686918A (en) * | 2019-11-21 | 2020-01-14 | 西南石油大学 | Simulation system and experiment method for stability of tunnel excavation surface through gas drainage regulation and control |
| CN111879477A (en) * | 2020-07-30 | 2020-11-03 | 陕西煤业化工技术研究院有限责任公司 | System and method for inspecting sealing effect of roadway spraying |
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| CN110686918B (en) * | 2019-11-21 | 2024-03-22 | 西南石油大学 | Simulation system and experimental method for stabilizing excavation surface of gas drainage control tunnel |
| CN111879477A (en) * | 2020-07-30 | 2020-11-03 | 陕西煤业化工技术研究院有限责任公司 | System and method for inspecting sealing effect of roadway spraying |
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Effective date of registration: 20220907 Address after: 714026 north side of South Street, new area, high tech Industrial Development Zone, Weinan City, Shaanxi Province Patentee after: Weinan Shaanxi coal Qichen Technology Co.,Ltd. Address before: 710077 Shaanxi Coal Industry Chemical Group Co., Ltd. No. 2 Jinye Road, Xi'an High-tech Zone, Shaanxi Province Patentee before: SHAANXI COAL AND CHEMICAL TECHNOLOGY INSTITUTE Co.,Ltd. |
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