CN107748241A - A kind of hydraulic fracturing and gas outburst hazard simulation test device - Google Patents

A kind of hydraulic fracturing and gas outburst hazard simulation test device Download PDF

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Publication number
CN107748241A
CN107748241A CN201711006198.4A CN201711006198A CN107748241A CN 107748241 A CN107748241 A CN 107748241A CN 201711006198 A CN201711006198 A CN 201711006198A CN 107748241 A CN107748241 A CN 107748241A
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CN
China
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pressure
gas
cylinder
sample
water
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CN201711006198.4A
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Chinese (zh)
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CN107748241B (en
Inventor
郑文红
潘山
潘一山
罗浩
邱兆云
唐治
肖永惠
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辽宁工程技术大学
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/22Fuels, explosives
    • G01N33/222Solid fuels, e.g. coal

Abstract

The present invention provides a kind of hydraulic fracturing and gas outburst hazard simulation test device, including sample loading device, high pressure water generating device and high pressure gas generating means, the high pressure gas generating means include gas gas cylinder and high pressure gas pressue device.The present invention presses loading simulation coal petrography in the ambient stress of underground by confined pressure loading and axle, and confined pressure, axle pressure, water pressure, gas pressure can be regulated and controled, sudden high pressure gas or sudden water under high pressure are obtained using high pressure gas generating means and high pressure water generating device, it is possible to achieve water pressure and gas pressure increase, slowly increased suddenly;The present invention clamps sample, good airproof performance using dismountable conical funnel shape sample holder head, and the air-tightness for solving the problems, such as water and gas is difficult to ensure that.The present invention is simple in construction, and one is dual-purpose, realizes the real simulation to hydraulic fracturing, coal and gas prominent disaster generating process, and means are provided for hydraulic fracturing and coal and gas prominent study mechanism and prevention.

Description

A kind of hydraulic fracturing and gas outburst hazard simulation test device

Technical field:

The present invention relates to a kind of hydraulic fracturing and Gas Outburst for being used to carry out hydraulic fracturing and gas outburst mechanism research Comprehensive simulation test device.

Background technology:

Coal and gas prominent is one of five big disaster of colliery, occupies in Coal Mine Disasters and roof accident is only second in ratio, be This, domestic and foreign scholars have done substantial amounts of work in terms of its mechanism and the research of prevention side, but with the increase of mining depth, one The rule of shallow mining is divided not to be suitable for deep coal and gas prominent crash analysis with prevention, it is necessary to consider deep mining feature Carry out new research;A kind of important well stimulation when hydrofracturing method is exploitation shale gas, while hydraulic fracturing is also colliery A kind of middle important anti-reflection means of mine for improving gas permeability of coal seam, thus, hydraulic fracturing experiment in laboratory can not only study page The crack initiation and extension of rock reservoir waterpower crackle, crack, coal seam reservoirs drilling release and anti-reflection technique effect can also be studied.Thus, Research hydraulic fracturing and gas outburst hazard experimental rig have important practical value and Research Significance.

Often specific aim is stronger for existing equipment, and a set of equipment can only be studied a kind of disaster, and volume Pang be present Greatly, complicated, utilization rate is relatively low, gas flow speed can not regulate and control and the gas of water and gas with hydraulic pressure during experiment The problems such as close sex chromosome mosaicism is difficult to ensure that.

The content of the invention:

The defects of for prior art, it is an object of the invention to provide one kind is simple in construction, one is dual-purpose, device is airtight Property higher, controllable confined pressure, the hydraulic fracturing of hydraulic pressure and pore pressure and gas outburst hazard simulation test device.

The present invention uses following technical scheme:A kind of hydraulic fracturing and gas outburst hazard simulation test device are provided, wrapped Include:Sample loading device, high pressure water generating device and high pressure gas generating means, the sample loading device include cylinder, if In the cavity for being used to load sample concentric with the cylinder in cylinder, the cylinder is provided with confined pressure entrance, and its left end It is connected provided with left end cap with drum closure, a ring support, the left end of the ring support passes through left end cap and the cylinder Left end is tightly connected, and its right-hand member is socketed on the left end of the cavity, and the right-hand member of the ring support is provided with ring baffle, the ring Fragility poly (methyl methacrylate) plate is provided between shape baffle plate and sample, the left end cap is provided with perforate so that the poly (methyl methacrylate) plate leads to Cross ring baffle and perforate is in communication with the outside;The right-hand member of the cylinder is connected provided with right end cap with the drum closure, the right side End cap is provided with axle press-in mouth, and axle pressure piston can slide along cylinder inner wall, and the axle center of the axle pressure piston is provided with input channel, The left end of the axle pressure piston is provided with the conical funnel shape sample holder head for being removably sleeved on described input channel one end, institute State conical funnel shape sample holder head to be used to fix sample located at the cavity inner wall, the right-hand member of the axle pressure piston is from the right side End cap stretches out, and the other end of the input channel connects the high pressure water generating device by shower nozzle and the high pressure gas occurs Device;The high pressure gas generating means includes gas gas cylinder and high pressure gas pressue device, and the shower nozzle includes impact head, connected Adapter and four-way connecting seat, one end of the impact head are connected with the input channel, and the other end is connected with the connecting tube, institute First mouth of pipe for stating four-way connecting seat connects the connecting tube, and second mouth of pipe connects the gas gas cylinder, the 3rd mouth of pipe connection institute High pressure gas pressue device is stated, the 4th mouth of pipe connects the high pressure water generating device.

When carrying out hydraulic fracturing experiment, the outwardly end of the conical funnel shape sample holder head is used for fixing band There is the sample of hollow round hole, the outwardly end is withstood in the hollow round hole of the sample, and water under high pressure is by the high pressure Water generating device enters in the input channel by the shower nozzle;When carrying out gas burst experiment, the conical funnel shape The end that sample holder head caves inward is used to fix sample, and methane gas passes through the spray by the high pressure gas generating means Head enters in the input channel.

The impact head is threadedly coupled by shear valve and shearing valve insert with the connecting tube.

First mouth of pipe is threadedly coupled by four-way connecting seat sealing gasket with the connecting tube.

Second mouth of pipe is connected by pipeline by gas pressure table, gas valve with the gas gas cylinder.

The high pressure gas pressue device includes gas pressurised water tank and pressure cylinder, and being provided with aqueous vapor in the pressure cylinder isolates Piston can slide along the pressure inside wall of cylinder, and the gas pressurised water tank passes through penstock and water pressure table and the pressure cylinder by pipeline One end connection, the other end of the pressure cylinder is connected with the 3rd mouth of pipe.

The high pressure water generating device includes high-pressure water tank, and the 4th mouth of pipe passes through high-pressure water pressure table and high-pressure water valve Door is connected with the high-pressure water tank.

The present invention has the advantage that compared with prior art:

1st, confined pressure of the present invention, axle pressure, water pressure, gas pressure can be regulated and controled, and pass through confined pressure loading and axle pressure loading The true stress environment of underground can be simulated, is then happened suddenly using high pressure gas generating means and high pressure water generating device Property high pressure gas and sudden water under high pressure, it is possible to achieve water pressure and gas pressure increase, slowly increased suddenly, to waterpower pressure Split and the simulation of coal and gas prominent disaster generating process is true and reliable;

2nd, the present invention is served as the outlet of gushing water by fragility lucite, and aspis can be achieved and quickly open, avoid artificially beating Open influence of the aspis to prominent process;

3rd, the present invention can use different wall, the sample of different central hole sizes to be tested, and real simulation underground is led Aquaporin present position state;The sample of different water cut can be used to be tested, consider coal petrography residing for underground State;

4th, the present invention is pressed from both sides using the conical funnel shape sample holder head for being removably sleeved on described input channel one end Sample, good airproof performance are held, the air-tightness for solving the problems, such as water and gas is difficult to ensure that;

5th, the present invention is simple in construction, and one is dual-purpose, and use is easy to operate.

Brief description of the drawings:

Fig. 1 is the overall structure sectional view of hydraulic fracturing provided by the invention and gas outburst hazard simulation test device;

To be of the invention when carrying out gas burst experiment, the set-up mode of the conical funnel shape sample holder head shows Fig. 2 It is intended to;

Fig. 3 is the enlarged drawing of shower nozzle in Fig. 1;

When Fig. 4 carries out hydraulic fracturing experiment for the present invention, the sample structure schematic diagram of use.

Embodiment:

With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below Example is used to illustrate the present invention, but is not limited to the scope of the present invention.

As shown in figure 1, a kind of hydraulic fracturing provided by the invention and gas outburst hazard simulation test device, including sample Loading device, high pressure water generating device and high pressure gas generating means.

The sample loading device includes a cylinder 2, and cylinder 2 is provided with the confined pressure to connect during simulated test with gases at high pressure There are the left end cap 1 and right end cap 10 that are connected with the thread seal of cylinder 2 in entrance 21, the left and right both ends of the cylinder 2 respectively, wherein The left end cap 1 is the Open architecture (to simulate lane space) of central aperture, when the right end cap 10 is provided with simulated test The axle press-in mouth 11 to connect with water under high pressure, being set in the cylinder 2 can be with the concentric cavity 6 of cylinder 2, the cavity 6 For TR thin rubber cylinder, the cavity 6 wraps up the sample being made up of coal column;Being provided with one in the right-hand member of the cylinder 2 can be along cylinder 2 The axle pressure piston 8 that wall slides, the axle center of the axle pressure piston 8 are provided with input channel 9, and the left end of the axle pressure piston 8 is provided with can The conical funnel shape sample holder first 30 for being sleeved on described one end of input channel 9 of dismounting, the conical funnel shape sample holder First 30 are used to fix sample located at the inwall of cavity 6, and the conical funnel shape sample holder first 30 leads to the inwall of cavity 6 Cross sealing ring to fix, the right-hand member of the axle pressure piston 8 stretches out from the right end cap 10, and the axle pressure piston 8 is interior with cylinder 2 Sealing ring is equipped between wall and right end cap 10;The other end of the input channel 9 connects the water under high pressure by a shower nozzle 12 Generating means and the high pressure gas generating means.

The right-hand member of the left end of the cavity 6 and a ring support 3 is socketed, tells the left end of ring support 3 and the circle Cylinder 2 left end be tightly connected by the left end cap 1, the right-hand member of the ring support 3 has interior edge, in interior edge close to sample one The ring baffle 4 of central aperture is placed on side, and fragility poly (methyl methacrylate) plate 5 is placed between ring baffle 4 and sample.

The high pressure gas generating means includes gas gas cylinder 15 and high pressure gas pressue device, the shower nozzle 12 such as Fig. 3 It is shown, including impact head 121, connecting tube 124 and four-way connecting seat 126, one end and the input channel of the impact head 121 9 connections, it is connected by shear valve 122 and shearing valve insert 123 with the threaded one end of the connecting tube 124, described four lead to First mouth of pipe 1261 of joint chair 126 is connected by four-way connecting seat sealing gasket 125 with the connecting tube 124, second mouth of pipe 1262 It is connected by pipeline by gas pressure table 13, gas valve 14 with the gas gas cylinder 15, the 3rd mouth of pipe 1263 connects the height Gas pressue device is pressed, the 4th mouth of pipe 1264 connects the high pressure water generating device.

The high pressure gas pressue device includes gas pressurised water tank 22 and pressure cylinder 16, and water is provided with the pressure cylinder 16 Gas separator piston 17 can slide along the inwall of pressure cylinder 16, have sealing between aqueous vapor separator piston 17 and pressure cylinder 16 inwall Circle, the gas pressurised water tank 22 are connected by pipeline by penstock 19 and water pressure table 18 with one end of the pressure cylinder 16, The other end of the pressure cylinder 16 is connected with the 3rd mouth of pipe 1263.

The high pressure water generating device includes high-pressure water tank 20, and the 4th mouth of pipe 1264 passes through the He of high-pressure water pressure table 23 Water under high pressure valve 24 is connected with the high-pressure water tank 20.

When carrying out hydraulic fracturing experiment using the present invention, sample uses the coal column with hollow round hole, as shown in figure 4, will The distance h of hollow round hole distance from bottom sample bottom in sample is asked to be more than or equal to sample wall thickness H, can according to experiment specific requirement Different wall H is made in sample, the circular hole of different hollow radius is tested, as shown in figure 1, the conical funnel shape specimen holder Hold first 30 outwardly ends to withstand in the hollow round hole of the sample, to fix style, and ensure sealing.Specific experiment Process:Gases at high pressure are injected by the confined pressure entrance 21 on cylinder 2, confined pressure is applied to the sample in cavity 6;Pass through cylinder right-hand member Axle press-in mouth 11 on lid 10 injects water under high pressure, and impeller-hub presses piston 8 to apply axle pressure to sample, to simulate coal petrography answering in underground Force environment;Then water under high pressure valve 24 is opened, the water under high pressure in high-pressure water tank 20 is filled with shower nozzle 12 by four-way connecting seat 126 In connecting tube 124 in, the water that is transmitted to pressure by four-way connecting seat 126 by high-pressure water tank 20 in connecting tube 124 makes water Pressure further increase, when water pressure increase to a certain extent when, the shearing that is placed between connecting tube 124 and impact head 121 Valve 122 is ruptured, and the input channel 9 that water under high pressure runs through impact head 121, pipeline and axle pressure piston 8 axle center is applied to sample inside Add sudden water pressure, under axle pressure, confined pressure and sudden water pressure collective effect, positioned at the organic glass of the fragility of the sample other end Glass plate 5 is broken, and broken sample therefrom sprays, and with this simulation water pressure, roof and floor caused by increase and coal seam gushing water occur suddenly Process.

When carrying out coal and gas prominent experiment using the present invention, sample can use the coal cinder of irregular shape, be not limited to coal Post, as shown in Fig. 2 the end that the conical funnel shape sample holder first 30 caves inward is used to fix the sample.Specific examination Test process:Gases at high pressure are injected by the confined pressure entrance 21 on cylinder 2, confined pressure is applied to the sample in cavity 6;It is right by cylinder Axle press-in mouth 11 on end cap 10 injects water under high pressure, and impeller-hub presses piston 8 to apply axle pressure to sample, to simulate coal petrography in underground Ambient stress;Then gas valve 14 is opened, the high pressure gas in gas gas cylinder 15 is filled with shower nozzle by four-way connecting seat 126 In connecting tube 124 in 12, high pressure gas pressue device is then turned on, pressure cylinder is promoted by the water under high pressure in gas pressurised water tank 22 Aqueous vapor separator piston 17 in 16 moves, and the air at the rear portion of pressurized water gas separator piston 17, pressure is passed through into four-way connecting seat 126 The methane gas being transmitted in connecting tube 124, the pressure of methane gas is set further to increase, when methane gas pressure increases to necessarily During degree, the shear valve 122 being placed between connecting tube 124 and impact head 121 ruptures, high pressure gas run through impact head 121, Pipeline and the input channel 9 in axle pressure piston 8 axle center apply sudden gas pressure to sample inside, in axle pressure, confined pressure and burst Property gas pressure collective effect under, the fragility poly (methyl methacrylate) plate 5 positioned at the sample other end is broken, and coal dust therefrom sprays, with this mould Intend gas pressure coal and gas prominent generating process caused by increase suddenly.

Finally it should be noted that:Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations;To the greatest extent The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that:Its according to The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered Row equivalent substitution;And these modifications or replacement, the essence of appropriate technical solution is departed from the claims in the present invention and limited Fixed scope.

Claims (7)

1. a kind of hydraulic fracturing and gas outburst hazard simulation test device, it is characterised in that including:Sample loading device, height Pressure water generating device and high pressure gas generating means, the sample loading device include cylinder, in cylinder with the cylinder The concentric cavity for being used to load sample, the cylinder is provided with confined pressure entrance, and its left end is provided with left end cap and cylinder is close Envelope connection, a ring support, the left end of the ring support are tightly connected by the left end of left end cap and the cylinder, its right-hand member The left end of the cavity is socketed on, the right-hand member of the ring support is provided with ring baffle, set between the ring baffle and sample Have fragility poly (methyl methacrylate) plate, the left end cap is provided with perforate so that the poly (methyl methacrylate) plate by ring baffle and perforate with External world's connection;The right-hand member of the cylinder is connected provided with right end cap with the drum closure, and the right end cap is provided with axle press-in mouth, One axle pressure piston can slide along cylinder inner wall, and the axle center of the axle pressure piston is provided with input channel, the left end of the axle pressure piston Provided with the conical funnel shape sample holder head for being removably sleeved on described input channel one end, the conical funnel shape specimen holder Hold head to be used to fix sample located at the cavity inner wall, the right-hand member of the axle pressure piston stretches out from the right end cap, the input The other end of pipeline connects the high pressure water generating device and the high pressure gas generating means by shower nozzle;
The high pressure gas generating means includes gas gas cylinder and high pressure gas pressue device, and the shower nozzle includes impact head, connected Adapter and four-way connecting seat, one end of the impact head are connected with the input channel, and the other end is connected with the connecting tube, institute First mouth of pipe for stating four-way connecting seat connects the connecting tube, and second mouth of pipe connects the gas gas cylinder, the 3rd mouth of pipe connection institute High pressure gas pressue device is stated, the 4th mouth of pipe connects the high pressure water generating device.
2. hydraulic fracturing according to claim 1 and gas outburst hazard simulation test device, it is characterised in that:Work as progress When hydraulic fracturing is tested, the outwardly end of the conical funnel shape sample holder head is used for the fixed examination with hollow round hole Sample, the outwardly end are withstood in the hollow round hole of the sample, and water under high pressure is passed through by the high pressure water generating device The shower nozzle enters in the input channel;When carrying out gas burst experiment, the conical funnel shape sample holder head is inside The end of depression is used to fix sample, and methane gas enters the input by the high pressure gas generating means by the shower nozzle In passage.
3. hydraulic fracturing according to claim 1 and gas outburst hazard simulation test device, it is characterised in that:The punching Tap the head and be threadedly coupled by shear valve and shearing valve insert with the connecting tube.
4. hydraulic fracturing according to claim 1 and gas outburst hazard simulation test device, it is characterised in that:Described One mouth of pipe is threadedly coupled by four-way connecting seat sealing gasket with the connecting tube.
5. hydraulic fracturing according to claim 1 and gas outburst hazard simulation test device, it is characterised in that:Described Two mouths of pipe are connected by pipeline by gas pressure table, gas valve with the gas gas cylinder.
6. hydraulic fracturing according to claim 1 and gas outburst hazard simulation test device, it is characterised in that:The height Pressure gas pressue device includes gas pressurised water tank and pressure cylinder, can be along pressure cylinder provided with aqueous vapor separator piston in the pressure cylinder Inwall is slided, and the gas pressurised water tank is connected by pipeline by penstock and water pressure table with one end of the pressure cylinder, institute The other end for stating pressure cylinder is connected with the 3rd mouth of pipe.
7. hydraulic fracturing according to claim 1 and gas outburst hazard simulation test device, it is characterised in that:The height Pressure water generating device includes high-pressure water tank, and the 4th mouth of pipe passes through high-pressure water pressure table and water under high pressure valve and the water under high pressure Case connects.
CN201711006198.4A 2017-10-25 2017-10-25 Comprehensive simulation test device for hydraulic fracturing and gas outburst CN107748241B (en)

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CN107748241B CN107748241B (en) 2020-04-21

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU796459A1 (en) * 1978-12-11 1981-01-15 Восточный Научно-Исследовательскийинститут По Безопасности Работ Вгорной Промышленности Device for simulating instant coal and gas outburst
CN101409024A (en) * 2008-07-25 2009-04-15 安徽理工大学 Analog system for coal seam mash gas dynamic action
CN103940962A (en) * 2014-04-15 2014-07-23 西安科技大学 System and method for simulating coal mine underground hydraulic fracturing experiment laboratory
CN205209887U (en) * 2015-12-09 2016-05-04 河南理工大学 Real triaxial hydraulic fracturing process buggy output test device of coal reservoir
CN106526094A (en) * 2016-12-27 2017-03-22 西安科技大学 Coal and gas outburst simulation experiment device and experiment method
CN206410979U (en) * 2017-01-25 2017-08-15 重庆地质矿产研究院 A kind of core holding unit for being used to simulate hydraulic fracturing and permeability test

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU796459A1 (en) * 1978-12-11 1981-01-15 Восточный Научно-Исследовательскийинститут По Безопасности Работ Вгорной Промышленности Device for simulating instant coal and gas outburst
CN101409024A (en) * 2008-07-25 2009-04-15 安徽理工大学 Analog system for coal seam mash gas dynamic action
CN103940962A (en) * 2014-04-15 2014-07-23 西安科技大学 System and method for simulating coal mine underground hydraulic fracturing experiment laboratory
CN205209887U (en) * 2015-12-09 2016-05-04 河南理工大学 Real triaxial hydraulic fracturing process buggy output test device of coal reservoir
CN106526094A (en) * 2016-12-27 2017-03-22 西安科技大学 Coal and gas outburst simulation experiment device and experiment method
CN206410979U (en) * 2017-01-25 2017-08-15 重庆地质矿产研究院 A kind of core holding unit for being used to simulate hydraulic fracturing and permeability test

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