CN106285679A - A kind of presplitting and the method softening igneous rock tight roof - Google Patents
A kind of presplitting and the method softening igneous rock tight roof Download PDFInfo
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- 239000011435 rock Substances 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000003245 coal Substances 0.000 claims abstract description 58
- 239000002253 acid Substances 0.000 claims abstract description 30
- 230000000694 effects Effects 0.000 claims abstract description 11
- 239000011229 interlayer Substances 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 11
- 229910001748 carbonate mineral Inorganic materials 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 238000009533 lab test Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000002441 X-ray diffraction Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims 1
- 238000010008 shearing Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 19
- 238000004880 explosion Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000005422 blasting Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009545 invasion Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010291 electrical method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/12—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid
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Abstract
The invention discloses a kind of presplitting and the method softening igneous rock tight roof, while exploitation superjacent, grasping upper and lower coal seam spacing, on the premise of the intrusion situation of interlayer nature of ground and igneous rock competent bed, while exploitation superjacent, by holing in top floor undulation reasonable Arrangement, inject high pressure acid solution, injected the pressure of acid solution by fracture acidizing unit allocation, on the one hand utilize pressure to make generation crack, hard igneous rock rock stratum；On the other hand utilize the chemical reaction effect of acid solution further hard igneous rock rock stratum to be softened, finally realize the safe and efficient effect ruptured and soften lower coal seam hard igneous rock top board.The method is boring acid filling while exploitation superjacent, destroys the tight roof structure of underlying seam, reduces its intensity；Weaken even avoid underlying seam exploitation time, the exploitation normal to work surface of igneous rock tight roof and the harm that personnel equipment is likely to result in.
Description
Technical field
The present invention relates to a kind of presplitting and soften igneous rock tight roof, it is ensured that work surface is safe and efficient is invaded by igneous rock
The method entering district, is specifically related to a kind of hole in advance, note the method that high pressure acid solution ruptures and softens igneous rock tight roof, belongs to
In Coal Mining Technology field.
Background technology
Along with the minimizing day by day of Jurassic coal carbon resource, the exploitation of Carbon Permian seam the most progressively launches, and become work as
Under main coal seam.But changeable at this coal measure strata complex geologic conditions, the sill and right that wherein formed after Igneous rock invasion
The destruction of coal rock layer character becomes the factor the most always of restriction coal seam safety and high efficiency.The intrusion of igneous rock, on the one hand makes coal
Layer silication is serious, large losses fat coal, on the other hand forms tight roof, changes coal seam rock property and structure.
Hard igneous rock top board due to have intensity high, fine and close good with integrity, joint is inadequate with cranny development, exist
The features such as the dirt band that stability is higher, cause top board during working face extraction to be difficult to be caving, especially at first weighting
Before, top board easily forms the outstanding top of large area, serious possibly even formation ore deposit shake.This not only causes work surface to leak out seriously,
Easily cause the series of problems such as face gas accumulation and spontaneous combustion in goaf, and hang in large area and produce when top is caving
Strong impact air-flow, be easily caused work surface and occur that Gas Outburst etc. such as impacts disaster, the person of serious threat coal miner
Safety and the steady running of the equipment of production, bring severe challenge to Safety of Coal Mine Production.
But, igneous rock top board often has certain sudden in the harm become, and causes the most tired to in-situ processing
Difficulty, seriously governs safe and efficient production.Such as Datong Mine Area exploitation Carbon Permian seam group, this coal measure strata minable coal seam
For coal seam, mountain 4, No. 2 coal seams, No. 3 coal seams, 3-5 super high seam and No. 8 coal seams.Each coal seam is the most in various degree by igneous rock
Invade, and the top of 3-5 super high seam is by large area stratiform Igneous rock invasion, forms large-scale igneous rock tight roof.
Super high seam itself adopts scope greatly, adds the impact of tight roof, often produces unmanageable roof accident.
The method of existing process tight roof mainly has hydrofracturing to soften top board (Chinese patent CN 104790951 A
Disclosing the method and device weakened away from coal seam 100～350m high position tight roof, Chinese patent CN 103527198 B is open
Cut tight roof top coal hydraulic fracture control method) and explosion presplitting softens, and (Chinese patent CN 103206903 B is open
A kind of tight roof orientation pressure-bearing Blasting Control method, it is deep that Chinese patent CN 103278055 B discloses a kind of tight roof
Top pressure relief method is cut in hole presplit blasting).The mode complex management of explosion presplitting, relates to explosive, the regulating the traffic of detonator, blows out
Want strict implement " a big gun tri-inspection system " and " three people's linkage blasting systems "；The harmful gass such as a large amount of CO of the instantaneous generation of explosion are to mine
Ventilation safety management causes tremendous influence, forms potential safety hazard；And explosion Financial cost is higher.By prior art and equipment
Limiting, under the conditions of high pressure water injection, equipment requirements condition is high and there is certain potential safety hazard, therefore the hydraulic pressure under the conditions of tight roof
It is the most notable that fracturing weakens technical controlling effect.Additionally, all exploitations in this coal seam of above-mentioned two class methods engineering is implemented, right
Production efficiency in coal seam has significant effect, and the uncontrollable situation of top board easily occurs in the process processing top board, for
The safety of work surface has great threat.If can be by certain method, just by hard before exploitation has the coal seam of tight roof
Top board gives presplitting and softening, the potential threat that tight roof exists is got rid of in advance, so can be achieved with the safety of work surface
Efficiently produce.And it is true that away from there is two-layer Main workable coal seams in the range of 30m above Permo-Carboniferous system 3-5 super high seam,
It is respectively coal seam, mountain 4 and No. 2 coal seams, and the mining conditions of this two-layer coal is relatively easy, and distance bottom igneous rock is hard
Top board is close together, thus provides good implementation condition for presplitting in advance and softening bottom igneous rock tight roof.
Summary of the invention
It is desirable to provide a kind of presplitting and the method for softening igneous rock tight roof, working in engineering reality
Face is directly implemented top board presplitting and be there is the problem affecting the safe and efficient production of work surface, while the contiguous seams of exploitation top
Hole at its floor strata (i.e. the roof strata of underlying seam), and inject high pressure acid solution, it is achieved under rupturing in advance and softening
The purpose of coal seam, portion tight roof, is avoiding tight roof accident, on the premise of fully ensuring that work surface personnel and equipment safety,
Improve the production efficiency of work surface to greatest extent.
The invention provides a kind of presplitting and the method softening igneous rock tight roof, the method is being grasped between upper and lower coal seam
Away from, before the intrusion situation (specifically including Igneous rock invasion layer position and thickness) of interlayer nature of ground and igneous rock competent bed
Put, while exploitation superjacent, by holing at top floor undulation, inject high pressure acid solution, by pressure break acid
Change unit allocation and inject the pressure of acid solution, on the one hand utilize pressure to make generation crack, hard igneous rock rock stratum；On the other hand profit
Softening hard igneous rock rock stratum further with the chemical reaction effect of acid solution, final realization ruptures and softens lower coal
The effect of the hard igneous rock top board of layer.
Specifically, said method comprises the following steps:
Step one: by surface drilling coring and the method for physical prospecting (electrical method and magnetic method), determine the character of exploiting field coal rock layer
With composition situation.Determine that upper and lower coal seam spacing and the physico-mechanical properties of each rock stratum of interlayer and petrology are special by laboratory test
Property；
Step 2: the degree of depth of the boring that the spacing of coal seam up and down determined according to previous step determines.According to hard igneous rock
Mechanical property determine the pressure that fracturing pump provides.Mineral composition and chemical composition according to igneous rock determine acid solution used
Concentration；
Step 3: the actual strength that the ultimate strength born by analyzing support is born with support compares, and determines igneous rock
The permission broken mechanics of tight roof, and determine the spacing of wells according to this；
Step 4: after determining the spacing of wells, when implementing driller's operation, for ensureing good fracturing effect, avoids simultaneously
Occurring cutting top phenomenon during lower seam mining, boring need to be 15 °～45° angle with vertical direction；
Step 5: after completing boring according to above-mentioned steps, utilizes fracture acidizing unit to inject acid solution right in boring
Boring carries out pressure break and softening；
Step 6: after complete pressure break and softening operation, residual acid solution in boring is reclaimed；
Step 7: after completing a pressure break, during along with the superjacent advance of the face to pre-set pressure break distance
Repeat the above steps, continues igneous rock tight roof is carried out pressure break.
In such scheme, drilling depth is the interlamellar spacing of upper and lower two-layer coal, and bore diameter is 75～100mm.
In said method, the determination of the spacing of wells can be determined by equation below:
In formula: p0For support ultimate strength allowed to bear；LkFor the support distance of face roof under control；M is for making top plate thickness；γ is top board
Rock unit weight.
Calculating gained igneous rock tight roof according to this formula allows broken mechanics to be the spacing of wells；
In such scheme, determine intrusion layer position and the thickness taking the character of coal rock layer and composition situation to specifically include igneous rock
Degree；The physico-mechanical properties of interlayer rock stratum includes the fundamental strength parameter of igneous rock, mainly has comprcssive strength, tensile strength and resists
Cut intensity；Petrology characteristic mainly comprises mineral composition and the content thereof of igneous rock, and emphasis considers the content of carbonate mineral.
The pressure that in such scheme, fracturing pump provides mainly intensity and residing layer position thereof according to igneous rock determines, this pressure
Below equation can be had to determine:
Wherein: pbFor the fracture pressure of crag of holing, MPa；
poFor the pore pressure of rock, MPa；
efFor the intensity of tensile stress of rock, i.e. rupture stress, MPa；
ehFor stratum minimum horizontal principal stress, MPa；
eHFor stratum maximum horizontal principal stress, MPa；
Z is poroelasticity constant；
OcFor the contact holes porosity of rock, %.
These parameters can be recorded by laboratory test.
In such scheme, the determination of the concentration of acid solution need to determine according to the content of carbonate mineral contained in igneous rock,
And the content of carbonate mineral can pass through X-ray diffraction (XRD) analysis acquisition in igneous rock.The principle of hydrochlorate reaction is as follows:
2H++CO3 -2=H2O+CO2
In such scheme, fracture acidizing unit is mainly preserved device by fracturing pump, digital control system, pipe-line system and fracturing fluid
Composition.By fracturing pump, the HCl solution that mass concentration is 15%～28% is pumped in boring, set pumping pressure, to fire
Diagenesis tight roof carries out pressure break, and the reaction that the carbonate mineral simultaneously utilizing acid solution contained with igneous rock is carried out softens
Igneous rock.After completing pressure break, the acid solution in boring is reclaimed.
Beneficial effects of the present invention:
(1) with existing to the technology of top plate drilling presplitting compared with, the method be to base plate hole, difficulty of construction substantially drops
Low, operability is higher；
(2) compared with the method for the presplitting top board of deep hole blasting, the method can avoid the hidden danger that explosion presplitting brings, such as
When running into working environment gas bearing capacity height, the very big potential safety hazard that explosion has；
(3) compared with the method for the fracturing used in existing colliery, the method uses acid solution to carry out pressure break, faced by
For the igneous rock tight roof that carbonate mineral component content is higher, soften and presplitting effect becomes apparent from；
(4) physics is rented to rupture to soften with chemical action and is well combined by the method, can guarantee that pole on the premise of safety
Big degree puies forward the efficiency processing tight roof problem.
Accompanying drawing explanation
Fig. 1 is presplitting and softens igneous rock tight roof schematic diagram.
Fig. 2 is that in Fig. 1, schematic diagram is arranged in Section A-A boring.
Fig. 3 is that in Fig. 1, schematic diagram is arranged in section B-B boring.
Fig. 4 is pressure break, bating effect figure.
Fig. 5 is Tashan Mountain mine stratigraphic column.
In figure, 1 is superjacent, and 2 is interlayer rock stratum, and 3 is hard igneous rock rock stratum, and 4 is underlying seam, and 5 is pressure break machine
Group, 6 is hydraulic support, and 7 is boring, and 8 is the spacing of wells, and 9 is bore angle, and 10 is acid solution, and 11 is fracturing fracture.
Detailed description of the invention
Further illustrate the present invention below by embodiment, but be not limited to following example.
Embodiment:
As a example by the Carbon Permian seam of ore deposit, Datong District, its minable coal seam distribution situation is as shown in table 1, Tashan Mountain mine stratigraphic column
Shape figure is as shown in Figure 5.
Table 1 Datong Mine Area Permo-Carboniferous system minable coal seam distribution situation
Understanding with Fig. 5 in conjunction with table 1, Tashan Mountain mine Permo-Carboniferous system minable coal seam is mountain4Number coal seam and 3-5 coal seam, No. 2
Coal seam is invaded serious by igneous rock (lamprophyre), and major part can not be adopted, and 3-5 super high seam top is invaded by stratiform lamprophyre,
Invade the thickest 6m that reaches of thickness, mountain4Number coal seam can be adopted by lamprophyre intrusion part.Wherein, mountain4Number coal seam and 3-5 super high seam
Average headway is 26m.
The problem that there is rhythm tight roof for bottom super high seam, on mountain, top4The long-armed work in number coal seam
Make the method employing longwork exploitation mountain, top that face utilizes boring presplitting to soften4While number coal seam, before hydraulic support
Holing immediately below direction, concrete operations are as follows:
(1) while superjacent 1 is exploited, arrange boring 7 to the tight roof of underlying seam 4 and inject acid solution
10；Being drilled in the hard igneous rock rock stratum 3 above 3-5# coal seam, bottom with 80mm drill bit, boring is along superjacent work surface cloth
Putting, bore angle 9 is defined as 15 °.Below the supporting intensity utilization of interlayer nature of ground and bottom working surface hydraulic support 6
Formula determines that the spacing of wells 8 is:
In formula: support ultimate strength p allowed to bear0For 1.5MPa；Support distance of face roof under control LkFor 5m；Igneous rock tight roof
Thickness m is 6m；Hard igneous rock balkstone unit weight γ is 2700N/m3。
(2) control to pump into the pressure of hydrochloric acid solution by Frac unit 5, until being higher than stratum rock rupture pressure or being more than
Intrinsic fracture clossing pressure；The mass fraction of hydrochloric acid is 20%.
Intensity according to hard igneous rock top board and the crustal stress of residing layer position thereof, the pressure pumping into acid solution is defined as
15.5MPa。
Rock rupture pressure is determined by below equation:
Wherein: pbFor the fracture pressure of crag of holing, MPa；
poFor the pore pressure of rock, MPa；
efFor the intensity of tensile stress of rock, i.e. rupture stress, MPa；
ehFor stratum minimum horizontal principal stress, MPa；
eHFor stratum maximum horizontal principal stress, MPa；
Z is poroelasticity constant；
OcFor the contact holes porosity of rock, %.
According to tunnel passing through solution cavity in Taishan mine coal petrography mechanical characteristic, determine pore pressure p of rockoFor 12MPa, the intensity of tensile stress of rock
efFor 8MPa, stratum maximum horizontal principal stress eHWith stratum minimum horizontal principal stress ehIt is respectively 12MPa and 9MPa, touching of rock
Point porosity OcTaking 0.5, poroelasticity constant Z takes 0.035, and substitute into that rock rupture pressure formula can hole crag ruptures pressure
Power is 15.5MPa.
(3) by pressure break and emollescence so that after hard igneous rock top board forms crack 11, stand 8 hours and reclaim
Acid solution in boring；
(4) after the distance (43m) that work surface pushes ahead a spacing of wells, repeat the above steps.
Claims (8)
1. a presplitting and the method for softening igneous rock tight roof, it is characterised in that: while exploitation superjacent, at the palm
Hold upper and lower coal seam spacing, on the premise of the intrusion situation of interlayer nature of ground and igneous rock competent bed, at exploitation top coal
While Ceng, by holing in top floor undulation reasonable Arrangement, inject high pressure acid solution, by fracture acidizing unit allocation
Inject the pressure of acid solution, on the one hand utilize pressure to make generation crack, hard igneous rock rock stratum；On the other hand acid solution is utilized
Hard igneous rock rock stratum is softened by chemical reaction effect further, finally realizes safe and efficient rupturing and softening lower coal seam
The effect of hard igneous rock top board.
Presplitting the most according to claim 1 and the method softening igneous rock tight roof, it is characterised in that: include following step
Rapid:
Step one: by surface drilling coring and the method for physical prospecting, determine character and the composition situation of exploiting field coal rock layer, by reality
Test room test and determine upper and lower coal seam spacing and the physico-mechanical properties of each rock stratum of interlayer and petrology characteristic；
Step 2: the degree of depth of the boring that the spacing of coal seam up and down determined according to previous step determines, according to the power of hard igneous rock
Learning character and determine the pressure that fracturing pump provides, mineral composition and chemical composition according to igneous rock determine the dense of acid solution used
Degree；
Step 3: the actual strength that the ultimate strength born by analyzing support is born with support compares, and determines that igneous rock is hard
The permission broken mechanics of top board, and determine the spacing of wells according to this；
Step 4: after determining the spacing of wells, when implementing driller's operation, for ensureing good fracturing effect, avoids lower coal simultaneously
Occurring cutting top phenomenon in layer recovery process, boring need to be 15 °～45° angle with vertical direction；
Step 5: after completing boring according to above-mentioned steps, utilizes fracture acidizing unit to inject acid solution in boring and to boring
Carry out pressure break and softening；
Step 6: after complete pressure break and softening operation, residual acid solution in boring is reclaimed；
Step 7: after completing a pressure break, repeats during along with the superjacent advance of the face to pre-set pressure break distance
Above-mentioned steps, continues igneous rock tight roof is carried out pressure break.
Presplitting the most according to claim 2 and the method softening igneous rock tight roof, it is characterised in that: step one institute is really
The character of fixed exploiting field coal rock layer and composition situation include intrusion layer position and the thickness of igneous rock；The physical mechanics property of interlayer rock stratum
Matter includes the fundamental strength parameter of igneous rock: comprcssive strength, tensile strength and shearing strength；Petrology characteristic mainly comprises pyrogene
The mineral composition of rock and content thereof, emphasis considers the content of carbonate mineral.
Presplitting the most according to claim 2 and the method softening igneous rock tight roof, it is characterised in that: step 2 determines
The interlamellar spacing that drilling depth is upper and lower two-layer coal, bore diameter is 75～100mm.
Presplitting the most according to claim 2 and the method softening igneous rock tight roof, it is characterised in that: step 2 determines
The concentration of acid solution need to determine according to the content of carbonate mineral contained in igneous rock, and carbonate mineral in igneous rock
Content can be obtained by X-ray diffraction analysis.
Presplitting the most according to claim 2 and soften igneous rock tight roof method, it is characterised in that: the spacing of wells by
Equation below determines:
In formula: p0For support ultimate strength allowed to bear；LkFor the support distance of face roof under control；M is for making top plate thickness；γ is balkstone
Unit weight.
Presplitting the most according to claim 2 and the method softening igneous rock tight roof, it is characterised in that: step 3 pressure break
The pressure that pump provides determines according to intensity and the residing layer position thereof of igneous rock, and this pressure is determined by below equation:
Wherein: pbFor the fracture pressure of crag of holing, MPa；
poFor the pore pressure of rock, MPa；
efFor the intensity of tensile stress of rock, i.e. rupture stress, MPa；
ehFor stratum minimum horizontal principal stress, MPa；
eHFor stratum maximum horizontal principal stress, MPa；
Z is poroelasticity constant；
OcFor the contact holes porosity of rock, %.
These parameters can be recorded by laboratory test；
Calculating gained igneous rock tight roof according to this formula allows broken mechanics to be the spacing of wells.
Presplitting the most according to claim 2 and the method softening igneous rock tight roof, it is characterised in that: step 5 relates to
Fracture acidizing unit mainly preserved device by fracturing pump, digital control system, pipe-line system and fracturing fluid and form；Will by fracturing pump
Concentration be 15%～28% HCl solution pump in boring, set pumping pressure, igneous rock tight roof carried out pressure break,
The reaction that the carbonate mineral simultaneously utilizing acid solution contained with igneous rock is carried out softens igneous rock, will bore after completing pressure break
Acid solution in hole reclaims.
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Cited By (12)
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|---|---|---|---|---|
| CN108361011A (en) * | 2018-03-08 | 2018-08-03 | 河南理工大学 | The method for controlling Affected areas by mining from underworkings orientation hydraulic fracturing |
| CN108708765A (en) * | 2018-04-13 | 2018-10-26 | 山东科技大学 | One kind strengthening acid fracturing coal uncovering method based on high temperature disturbance |
| CN108894784A (en) * | 2018-07-20 | 2018-11-27 | 中铁十九局集团矿业投资有限公司 | A kind of tight roof orientation acid fracturing control top pressure relief method |
| CN108999636A (en) * | 2018-07-20 | 2018-12-14 | 中铁十九局集团矿业投资有限公司 | A kind of pressure break and the softening hard difficulty of underground coal mine collapse the constructing device and method of top plate |
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| CN112647944A (en) * | 2020-12-22 | 2021-04-13 | 中国矿业大学 | Equipment and method for controlling underground ore limestone top plate through acidizing and fracturing |
| CN114320161A (en) * | 2022-01-20 | 2022-04-12 | 河南理工大学 | Chemical reaming method for coal seam vertical roof cutting and drilling |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083164A (en) * | 1992-07-01 | 1994-03-02 | 哈利伯顿公司 | Method of fracture acidizing subterranean formations |
| CN101781553A (en) * | 2010-02-05 | 2010-07-21 | 西安科技大学 | Active fracturing reagent for softening coal rock |
| CN104005766A (en) * | 2014-05-12 | 2014-08-27 | 山西蓝焰煤层气集团有限责任公司 | Chemical method for weakening of top coal |
| CN104213919A (en) * | 2014-08-06 | 2014-12-17 | 中国矿业大学 | Prevention method of shallow-buried steeply-inclined coal seam rock burst |
| CN104594901A (en) * | 2014-12-08 | 2015-05-06 | 太原理工大学 | Method for enabling working face to pass through igneous rock intrusion area |
-
2016
- 2016-08-11 CN CN201610659540.XA patent/CN106285679B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083164A (en) * | 1992-07-01 | 1994-03-02 | 哈利伯顿公司 | Method of fracture acidizing subterranean formations |
| CN101781553A (en) * | 2010-02-05 | 2010-07-21 | 西安科技大学 | Active fracturing reagent for softening coal rock |
| CN104005766A (en) * | 2014-05-12 | 2014-08-27 | 山西蓝焰煤层气集团有限责任公司 | Chemical method for weakening of top coal |
| CN104213919A (en) * | 2014-08-06 | 2014-12-17 | 中国矿业大学 | Prevention method of shallow-buried steeply-inclined coal seam rock burst |
| CN104594901A (en) * | 2014-12-08 | 2015-05-06 | 太原理工大学 | Method for enabling working face to pass through igneous rock intrusion area |
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