CN105952448A - Horizontal fragmentation hydrofracturing chemical modification method for lamprophyres in thick coal seam - Google Patents
Horizontal fragmentation hydrofracturing chemical modification method for lamprophyres in thick coal seam Download PDFInfo
- Publication number
- CN105952448A CN105952448A CN201610502871.2A CN201610502871A CN105952448A CN 105952448 A CN105952448 A CN 105952448A CN 201610502871 A CN201610502871 A CN 201610502871A CN 105952448 A CN105952448 A CN 105952448A
- Authority
- CN
- China
- Prior art keywords
- lamprophyre
- water
- fracturing
- group
- lamprophyres
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C39/00—Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a horizontal fragmentation hydrofracturing chemical modification method for lamprophyres in a thick coal seam. According to the method, the existence state of the lamprophyres is detected in the thick coal seam; due to water injection and drilling of the coal seam in lamprophyre-containing regions of two roadways, horizontal fragmentation pre-fracturing is realized; in a drilling process, a plurality of V-shaped slots are formed in a hole through a slotting drill, and then high-pressure water injection is carried out for pre-fracturing; finally, a chemical solution is injected for fracturing. Under the actions of the chemical solution and the lamprophyres, the mechanical strength of the lamprophyres is reduced, so that the lamprophyres can be softened; a proper coal mining cyclic progress is selected, so that a coal mining machine can directly cut the lamprophyres during perforation and chemical reaction; mechanical wear and dust generation of the coal mining machine are reduced; furthermore, the horizontal fragmentation hydrofracturing chemical modification method is easy to operate, high in practicability, economic and reasonable, and is higher in popularization and practical application value.
Description
Technical field
The present invention relates to a kind of high seam invades the processing method of lamprophyre on a large scale, the technical scheme of lamprophyre horizontal fragmentation hydrofracturing chemical modification in a kind of high seam.
Background technology
Bottom, coal seam parent rock material is through substantial amounts of geological movement, melted magma after remelting moves upward, owing to the strength ratio of coal is more weak, the most on a large scale in invaded coal layer, cooled and solidified forms lamprophyre, lamprophyre invaded coal layer destroys the integrity in coal seam, have a strong impact on the normal of colliery to produce and economic benefit, the marked feature that in coal seam, lamprophyre has on a large scale, seriality, intensity are big and hydrophilic is weak, causing the extreme wear of coal excavation apparatus in recovery process and can produce substantial amounts of dust, dust has the biggest harm to plant equipment and personnel in the pit.The reasonable mode of lamprophyre in coal seam that processes at present is blasting method or directly moves away from work surface, the mechanism that Zhou Hong is formed by rock mass in research coal seam in paper " irregular rock mass formation mechanism study and effect in coal seam ", and the method proposing several explosion treatment；Fan Changpeng, in " selection of stope igneous rock method ", designs different schemes, is respectively with fight back is adopted, with rock back production with three kinds of schemes of end back production.But it is low to there is production efficiency in all upper several methods, production cost is high, waste the problems such as substantial amounts of coal resources simultaneously, in addition, it is often more important that the rock fragmentation after explosion is big, it is still desirable to the cut of coal-winning machine, the most also it is the failure to solution problem, and explosion is the biggest on the impact of tunnel and work surface, easily causes roof accident even to induce underground hazard, there is the biggest potential safety hazard.
For the problems referred to above, prior art does not has more preferable solution, meanwhile, during thick coal-layer mining, coal-bed flooding is the maximally effective dust suppression of current stope, along with the growth of coal-face, it is generally adopted by longhole infusion, hole depth be face length more than half, the effect purpose of boring is more single, fails to reach maximum utilization rate.
Summary of the invention
In order to overcome above-mentioned prior art to there is deficiency, the present invention provides a kind of high seam lamprophyre horizontal fragmentation hydrofracturing chemical modification method.
The purpose of the present invention is achieved through the following technical solutions.
A kind of high seam lamprophyre horizontal fragmentation hydrofracturing chemical modification method, described method is carried out according to the following steps:
(1) seismic wave CT technology is utilized to verify the regularity of distribution and the existence range of lamprophyre in high seam；
(2) at tailgate and haulage way along rib, utilize the boring of early stage coal-bed flooding, slot in the borehole, and be 5-8m in early stage design water injecting drilling spacing, alternate setting is wanted in the boring in upper and lower two lanes, and all of boring in two sides is 8 with rib level angle in downward directionO-15O, each boring fluting bores and opens one " V " type groove, each in hole " V " type groove and its corresponding hole wall every 5m is one group, starts to be first group from the lowermost end in hole, is respectively second group at aperture, the 3rd group ... n-th group；
(3) water injection hole packer is connected with high pressure water injection pipe, the water pipe other end is connected with high pressure water-injection pump, first water filling sealing device for outlet is placed in the two ends of first group of boring, being then turned on high pressure water-injection pump and carry out water filling presplitting by hole packer, the water filling fracturing time is 240s, and water filling water pressure is 45-50MPa, first group carries out after fracturing completes, second group being carried out fracturing, by that analogy until completing all to organize fracturing, during fracturing, water injection pressure being monitored in real time；
(4) lamprophyre is sampled test, according to Experimental Procedures, measure the uniaxial compressive strength of lamprophyre, porosity, water absorption and the relevant parameter of water penetration, use X-ray diffractometer to carry out macula lutea rock mineralogical composition to measure, according to lamprophyre chemical composition, select corresponding chemical solution, under identical time conditions, the test uniaxial compressive strength of variable concentrations solution correspondence lamprophyre and triaxial shear strength, be fitted its both relation corresponding；Same under conditions of same concentrations solution, the uniaxial compressive strength of lamprophyre and triaxial shear strength in test different time sections, and its corresponding both sides relation is fitted, determine solution concentration through fitting result；
(5) according to relevant parameter and the hydraulic pressure presplitting effect of porosity, water absorption and the water penetration of lamprophyre, the reservoir quantity injected in true directional hole and fluid injection time, fluid injection is then carried out；
(6) according to the lamprophyre uniaxial tension test after chemical solution effect and the Cutting Performance of coal-winning machine, determine coal-winning machine rationally cuts deep and work surface normal circulation progress.
Above-mentioned the provided a kind of high seam lamprophyre horizontal fragmentation hydrofracturing chemical modification method of the present invention, makes full use of the water injecting drilling in high seam in lamprophyre rock stratum, and opens several " V " type grooves in the borehole with fluting brill, carries out high pressure closure water filling.The purpose opening " V " type groove is to utilize its hydraulic pressure to be destroyed in this stress concentration to make cranny development abundant, and crack can to deep infiltration and development to follow-up chemical reaction advantageously, crack can be made in segment level presplitting more uniform in spatial distribution, chemical solution can efficiently control action time, so that chemical action is more abundant, chemical solution is utilized effectively chemico-physical properties intrinsic for lamprophyre to be changed, thus the mechanical strength reducing lamprophyre makes it soften, coal-winning machine is selected reasonably to cut deep and work surface advance of working cycle, coal-winning machine progradation is made to be able to continuously, and effectively reduce the abrasion of coal-cutting machinery and the coal dust of coal-face, ensure that the normal propelling of fully-mechanized mining working, economic use, safe and reliable, there are the biggest promotion and application be worth.
Accompanying drawing explanation
Fig. 1 be this method planar structure schematic diagram is set.
Fig. 2 is that the C-C cross section boring of this method Fig. 1 arranges planar structure schematic diagram.
Fig. 3 is the D-D cross section boring plan structure schematic diagram of this method Fig. 1.
Fig. 4 is the uniaxial compressive strength graph of a relation with soak time of this method lamprophyre.
Fig. 5 is the uniaxial compressive strength graph of a relation with soak time of this method lamprophyre.
In figure: 1, overlying rock；2, roof；3, coal seam；4, base plate；5, haulage way；6, dip angle of hole；7, lamprophyre body；8, tailgate；9, boring；10, V-groove；11, goaf.
Specific embodiments
Below the detailed description of the invention of the present invention is further illustrated.
Implementing lamprophyre horizontal fragmentation hydrofracturing chemical modification method in a kind of high seam, the method is carried out by following step:
Step one, utilizes seismic wave CT technology to verify the regularity of distribution and the existence range of lamprophyre in high seam.
Step 2, at tailgate and haulage way along rib, utilize the boring of early stage coal-bed flooding, slot in the borehole, in order to reach more preferable effect, distance between early stage design water injecting drilling is 5-8m, and alternate setting is wanted in the boring in upper and lower two lanes, and all of boring in two sides and rib level angle in downward direction are 8O-15ODownward angle the most effectively increases presplitting length but also can reduce waste during the later stage injects chemical solution, each boring fluting bores opens " V " type groove every 5m, in hole, each " V " type groove and its corresponding hole wall are referred to as a group, start to be first group from the lowermost end in hole, at aperture, be respectively second, the 3rd ... n-th, fluting bores the present use in this area extensively, and structure and performance skilled addressee understand.
Step 3, water injection hole packer is connected with high pressure water injection pipeline, the other end of pipeline is connected with high pressure water-injection pump, first water filling sealing device for outlet is placed in the two ends of first group of boring, it is then turned on high pressure water-injection pump and carries out water filling presplitting by hole packer, the fracturing time of water filling is 240s, the peak value saying pressure in this time period is 45-50MPa, first group carries out after fracturing completes, fracturing is carried out to second group, by that analogy until completing whole groups, water injection pressure is monitored in real time during fracturing.
Step 4, lamprophyre is sampled test, according to Experimental Procedures, measure the uniaxial compressive strength of lamprophyre, porosity, each parameter that water absorption and water penetration etc. are relevant, X-ray diffractometer is used to be measured the main mineral constituent of lamprophyre, according to the main chemical compositions of lamprophyre, select corresponding chemical solution, under identical time conditions, the uniaxial compressive strength of test variable concentrations solution correspondence lamprophyre and triaxial shear strength, its both relation corresponding is fitted, same under conditions of same concentrations solution, the uniaxial compressive strength of lamprophyre and triaxial shear strength in test different time sections, and its corresponding both sides relation is fitted, the concentration of solution is determined through fitting result.
Step 5, according to the reservoir quantity injected in the relevant parameters such as porosity, water absorption and the water penetration of lamprophyre and the true directional hole of hydraulic pressure presplitting effect, the fluid injection time, then carries out the operation sequence of fluid injection.
Step 6, according to uniaxial tension test and the Cutting Performance of coal-winning machine of the lamprophyre after chemical solution effect, determine coal-winning machine rationally cuts deep and work surface normal circulation progress.
In the above-described embodiment, in the physico-chemical test of the standard specimen of lamprophyre, the main chemical compositions of lamprophyre is SiO2, constituting about 28%-45%, the fitting result in step 4 may determine that as by the NaOH solution of 0.3%-0.5%, and soak time was the best results of 7 days-10 days.
In the above-described embodiment, the uniaxial tension test of lamprophyre is rendered as with the rule of chemical solution action time and original uniaxial compressive strength:
δ= -aln(t)+ δ0
In formula, δ is the uniaxial compressive strength after lamprophyre and chemical solution effect, and a is fitting coefficient, and t is the action time of chemical solution, δ0 Natural uniaxial compressive strength for lamprophyre.
In the above-described embodiment, coal-winning machine is deep for 300mm-800mm by rationally cutting of lamprophyre region, and in order to protect the pick of coal-winning machine, value should be less than the value in theory.
In order to make the purpose of the present invention, advantage and technical scheme become apparent from, below in conjunction with accompanying drawing and example, the present invention is described in detail.Concrete example only explains the present invention, does not limit the present invention.
Embodiment 1
One, utilizing seismic wave CT technology to verify the lamprophyre regularity of distribution in the A high seam of certain ore deposit and existence range, its shape is similar to elliptical shape, and its major axis is 112m, and short axle is 62m, lamprophyre body distance return aircourse nearest place be 15.2m；
Two, at tailgate and haulage way along rib, early stage coal-bed flooding is utilized to hole, slot in the borehole, in order to reach more preferable effect, distance between early stage design water injecting drilling is 5-8m, alternate setting is wanted in the boring in upper and lower two lanes, and all of boring in two sides and rib level angle in downward direction are 8O-15O, downward angle the most effectively increases presplitting length but also can reduce waste during the later stage injects chemical solution, and each boring fluting brill is opened " V " type groove, each in hole " V " type groove and its corresponding hole wall every 5m and is referred to as a group.Starting to be first group from the lowermost end in hole, be respectively second at aperture, the 3rd ... n-th, fluting bores the present use in this area extensively, and structure and performance skilled addressee understand.
Three, water injection hole packer is connected with high pressure water injection pipeline, the other end of pipeline is connected with high pressure water-injection pump, first water filling sealing device for outlet is placed in the two ends of first group of boring, being then turned on high pressure water-injection pump and carry out water filling presplitting by hole packer, the fracturing time of water filling is 240s, and the peak value saying pressure in this time period is 50MPa, first group carries out after fracturing completes, second group being carried out fracturing, by that analogy until completing whole groups, water injection pressure being monitored in real time during fracturing.
Four, lamprophyre being sampled test, according to Experimental Procedures, the uniaxial compressive strength measuring lamprophyre is 48.25MPa, porosity is 3.61%, water absorption 2.58% and infiltration coefficient are 6 × 10-3The parameters such as cm/s, use X-ray diffractometer to be measured the main mineral constituent of lamprophyre: SiO2
Account for 56%, the oxides such as FeO and MgO account for 24%, other compositions account for 20%, according to the main chemical compositions of lamprophyre, select corresponding NaOH chemical solution, under identical time conditions, the uniaxial compressive strength of test variable concentrations solution correspondence lamprophyre and triaxial shear strength, its both relation corresponding is fitted, same under conditions of same concentrations solution, the uniaxial compressive strength of lamprophyre and triaxial shear strength in test different time sections, and its corresponding both sides relation is fitted, the concentration of solution is determined through fitting result, further, the uniaxial tension test of lamprophyre is rendered as with the rule of chemical solution action time and original uniaxial compressive strength:
δ= -11.582ln(t)+ 48.25
δ is the uniaxial compressive strength after lamprophyre and chemical solution effect, and a is fitting coefficient, and t is the action time of chemical solution, δ0 Natural uniaxial compressive strength for lamprophyre.
Five, according to reservoir quantity is lamprophyre cumulative volume 5%, the fluid injection time 2h injected in the relevant parameters such as porosity, water absorption and the water penetration of lamprophyre and the true directional hole of hydraulic pressure presplitting effect, and the operation sequence of fluid injection is directly carried out.
Six, according to uniaxial tension test and the Cutting Performance of coal-winning machine of the lamprophyre after chemical solution effect, determine coal-winning machine rationally cuts deep and work surface normal circulation progress, in the physico-chemical test of the standard specimen of lamprophyre, the main chemical compositions of lamprophyre is SiO2Constitute about 28%-56%; fitting result in step 4 may determine that as by the NaOH solution of 0.3%-0.5%; soak time was the best results of 7 days-10 days; coal-winning machine is deep for 300mm-800mm by rationally cutting of lamprophyre region; in order to protect the pick of coal-winning machine, value should be less than the value in theory.
Embodiment 2
One, utilizing seismic wave CT technology to verify the lamprophyre regularity of distribution in the B high seam of certain ore deposit and existence range, its shape is approximately round, and its average diameter is about 102m, distance return aircourse nearest place be 35.6m.
Two, at tailgate and haulage way along rib, utilize the boring of early stage coal-bed flooding, slot in the borehole, in order to reach more preferable effect, distance between early stage design water injecting drilling is 5-8m, alternate setting is wanted in the boring in upper and lower two lanes, and all of boring in two sides and rib level angle in downward direction are 8O-15ODownward angle the most effectively increases presplitting length but also can reduce waste during the later stage injects chemical solution, each boring fluting bores opens " V " type groove every 5m, in hole, each " V " type groove and its corresponding hole wall are referred to as a group, start to be first group from the lowermost end in hole, at aperture, be respectively second, the 3rd ... n-th, fluting bores the present use in this area extensively, and structure and performance skilled addressee understand.
Three, water injection hole packer is connected with high pressure water injection pipeline, the other end of pipeline is connected with high pressure water-injection pump, first water filling sealing device for outlet is placed in the two ends of first group of boring, being then turned on high pressure water-injection pump and carry out water filling presplitting by hole packer, the fracturing time of water filling is 210s, and the peak value saying pressure in this time period is 50MPa, first group carries out after fracturing completes, second group being carried out fracturing, by that analogy until completing whole groups, water injection pressure being monitored in real time during fracturing.
Four, lamprophyre being sampled test, according to Experimental Procedures, the uniaxial compressive strength measuring lamprophyre is 50.25MPa, porosity is 2.98%, water absorption 2.12% and infiltration coefficient are 5.2 × 10-3The parameters such as cm/s, use X-ray diffractometer to be measured the main mineral constituent of lamprophyre: SiO2
Account for 48%, FeO, MgO and K2The oxides such as O account for 29%, other compositions account for 23%, according to the main chemical compositions of lamprophyre, select corresponding NaOH chemical solution, under identical time conditions, the uniaxial compressive strength of test variable concentrations solution correspondence lamprophyre and triaxial shear strength, its both relation corresponding is fitted, same under conditions of same concentrations solution, the uniaxial compressive strength of lamprophyre and triaxial shear strength in test different time sections, and its corresponding both sides relation is fitted, the concentration of solution is determined through fitting result, the uniaxial tension test of lamprophyre is rendered as with the rule of chemical solution action time and original uniaxial compressive strength:
δ= -9.967ln(t)+ 50.12
In formula, δ is the uniaxial compressive strength after lamprophyre and chemical solution effect, and a is fitting coefficient, and t is the action time of chemical solution, δ0 Natural uniaxial compressive strength for lamprophyre.
Five, according to reservoir quantity is lamprophyre cumulative volume 5%, the fluid injection time 2h injected in the relevant parameters such as porosity, water absorption and the water penetration of lamprophyre and the true directional hole of hydraulic pressure presplitting effect, and the operation sequence of fluid injection is directly carried out.
Six, according to uniaxial tension test and the Cutting Performance of coal-winning machine of the lamprophyre after chemical solution effect, determine coal-winning machine rationally cuts deep and work surface normal circulation progress, in the physico-chemical test of the standard specimen of lamprophyre, the main chemical compositions of lamprophyre is SiO2Constitute about 28%-56%; fitting result in step 4 may determine that as by the NaOH solution of 0.3%-0.5%; soak time was the best results of 7 days-10 days; coal-winning machine is deep for 300mm 800mm by rationally cutting of lamprophyre region; in order to protect the pick of coal-winning machine, value should be less than the value in theory.
Claims (1)
1. a high seam lamprophyre horizontal fragmentation hydrofracturing chemical modification method, described method is carried out according to the following steps:
(1) seismic wave CT technology is utilized to verify the regularity of distribution and the existence range of lamprophyre in high seam；
(2) at tailgate and haulage way along rib, utilize the boring of early stage coal-bed flooding, slot in the borehole, and be 5-8m in early stage design water injecting drilling spacing, alternate setting is wanted in the boring in upper and lower two lanes, and all of boring in two sides is 8 with rib level angle in downward directionO-15O, each boring fluting bores and opens one " V " type groove, each in hole " V " type groove and its corresponding hole wall every 5m is one group, starts to be first group from the lowermost end in hole, is respectively second group at aperture, the 3rd group ... n-th group；
(3) water injection hole packer is connected with high pressure water injection pipe, the water pipe other end is connected with high pressure water-injection pump, first water filling sealing device for outlet is placed in the two ends of first group of boring, being then turned on high pressure water-injection pump and carry out water filling presplitting by hole packer, the water filling fracturing time is 240s, and water filling water pressure is 45-50MPa, first group carries out after fracturing completes, second group being carried out fracturing, by that analogy until completing all to organize fracturing, during fracturing, water injection pressure being monitored in real time；
(4) lamprophyre is sampled test, according to Experimental Procedures, measure the uniaxial compressive strength of lamprophyre, porosity, water absorption and the relevant parameter of water penetration, use X-ray diffractometer to carry out macula lutea rock mineralogical composition to measure, according to lamprophyre chemical composition, select corresponding chemical solution, under identical time conditions, the test uniaxial compressive strength of variable concentrations solution correspondence lamprophyre and triaxial shear strength, be fitted its both relation corresponding；Same under conditions of same concentrations solution, the uniaxial compressive strength of lamprophyre and triaxial shear strength in test different time sections, and its corresponding both sides relation is fitted, determine solution concentration through fitting result；
(5) according to relevant parameter and the hydraulic pressure presplitting effect of porosity, water absorption and the water penetration of lamprophyre, the reservoir quantity injected in true directional hole and fluid injection time, fluid injection is then carried out；
(6) according to the lamprophyre uniaxial tension test after chemical solution effect and the Cutting Performance of coal-winning machine, determine coal-winning machine rationally cuts deep and work surface normal circulation progress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610502871.2A CN105952448B (en) | 2016-06-30 | 2016-06-30 | High seam lamprophyre horizontal fragmentation hydrofracturing chemical modification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610502871.2A CN105952448B (en) | 2016-06-30 | 2016-06-30 | High seam lamprophyre horizontal fragmentation hydrofracturing chemical modification method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105952448A true CN105952448A (en) | 2016-09-21 |
| CN105952448B CN105952448B (en) | 2017-12-12 |
Family
ID=56902635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610502871.2A Expired - Fee Related CN105952448B (en) | 2016-06-30 | 2016-06-30 | High seam lamprophyre horizontal fragmentation hydrofracturing chemical modification method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105952448B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021008192A1 (en) * | 2019-07-12 | 2021-01-21 | 太原理工大学 | Research model for coal and construction method therefor |
| CN114135287A (en) * | 2021-12-03 | 2022-03-04 | 太原理工大学 | Three-dimensional directional pre-splitting method for rock drilling high-temperature thermal cracking |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB919284A (en) * | 1958-08-16 | 1963-02-20 | Hedwig Beukenberg | Method and apparatus for breaking minerals loose especially for mining of coal |
| US4708395A (en) * | 1984-11-05 | 1987-11-24 | Conoco Inc. | Remotely sensing of excavation cavity during mining |
| CN101713290A (en) * | 2009-12-10 | 2010-05-26 | 天地科技股份有限公司 | Method for clearing rock burst of full-mine laneway deep in mine |
| CN102296958A (en) * | 2011-07-22 | 2011-12-28 | 山东科技大学 | Method for preventing rock burst by artificial space defect body |
| CN102322262A (en) * | 2011-09-12 | 2012-01-18 | 山东科技大学 | Colliery isolated island coal column crossheading bump control method |
| CN102678120A (en) * | 2012-05-18 | 2012-09-19 | 河南大有能源股份有限公司 | Method for releasing pressure and removing danger of rock burst |
| CN103233738A (en) * | 2013-04-27 | 2013-08-07 | 西安科技大学 | Comprehensive weakening method of top coal of heavy-pitch super high seam |
| RU2554605C2 (en) * | 2011-12-30 | 2015-06-27 | Чайна Юниверсити Оф Майнинг Энд Текнолоджи | Method for prevention and control of sudden zonal coal and gas emissions |
-
2016
- 2016-06-30 CN CN201610502871.2A patent/CN105952448B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB919284A (en) * | 1958-08-16 | 1963-02-20 | Hedwig Beukenberg | Method and apparatus for breaking minerals loose especially for mining of coal |
| US4708395A (en) * | 1984-11-05 | 1987-11-24 | Conoco Inc. | Remotely sensing of excavation cavity during mining |
| CN101713290A (en) * | 2009-12-10 | 2010-05-26 | 天地科技股份有限公司 | Method for clearing rock burst of full-mine laneway deep in mine |
| CN102296958A (en) * | 2011-07-22 | 2011-12-28 | 山东科技大学 | Method for preventing rock burst by artificial space defect body |
| CN102322262A (en) * | 2011-09-12 | 2012-01-18 | 山东科技大学 | Colliery isolated island coal column crossheading bump control method |
| RU2554605C2 (en) * | 2011-12-30 | 2015-06-27 | Чайна Юниверсити Оф Майнинг Энд Текнолоджи | Method for prevention and control of sudden zonal coal and gas emissions |
| CN102678120A (en) * | 2012-05-18 | 2012-09-19 | 河南大有能源股份有限公司 | Method for releasing pressure and removing danger of rock burst |
| CN103233738A (en) * | 2013-04-27 | 2013-08-07 | 西安科技大学 | Comprehensive weakening method of top coal of heavy-pitch super high seam |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021008192A1 (en) * | 2019-07-12 | 2021-01-21 | 太原理工大学 | Research model for coal and construction method therefor |
| CN114135287A (en) * | 2021-12-03 | 2022-03-04 | 太原理工大学 | Three-dimensional directional pre-splitting method for rock drilling high-temperature thermal cracking |
| CN114135287B (en) * | 2021-12-03 | 2023-09-08 | 太原理工大学 | Rock drilling high-temperature thermal cracking three-dimensional directional pre-cracking method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105952448B (en) | 2017-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107313778B (en) | A kind of second mining super high seam stops the method for adopting line coal column | |
| WO2017096674A1 (en) | An above ground and underground cooperative control method of far and near field roofs of extra-large stoping space | |
| CN102678120B (en) | Method for releasing pressure and removing danger of rock burst | |
| CN106285679B (en) | A kind of presplitting and the method for softening igneous rock tight roof | |
| CN105909246B (en) | A kind of chemical weakening method of high seam moderate heat diagenesis horizontal fragmentation blast cracking | |
| CN110242301A (en) | A kind of modified water-protection coal-mining method of two step slip casting of top plate water-bearing layer | |
| CN106014407B (en) | Utilize the roof fracture water method that reduction master control coal rock layer controls disaster in situ | |
| CN103498680B (en) | Improve the method for fully mechanized coal face period of beginning mining top-coal recovery rate | |
| CN107120137B (en) | A kind of coal roadway tunneling is along seat earth Deephole pre-splitting blasting pumping method | |
| CN109209472A (en) | The coal seam pressure relief anti-burst method that a kind of punching, explosion, water filling intercouple | |
| CN108343418B (en) | Method for controlling mining influence range from surface directional hydraulic fracturing pre-cracked bedrock | |
| Huang et al. | Field investigation into directional hydraulic fracturing for hard roof in Tashan Coal Mine | |
| CN112160792B (en) | Staged hydraulic fracturing working method for underground hard top plate | |
| CN106150507A (en) | A kind of method in hydrofracturing segment blast speedy drivage tunnel | |
| CN106089291A (en) | A kind of collaborative extraction is caving the old dead zone of formula and the method for lower coal seam coal bed gas | |
| CN102878874A (en) | Deep-hole pre-splitting blasting grouting method | |
| CN102678166B (en) | Method for increasing gas extraction rate by permeability increasing of single thick coal seam | |
| CN105178933A (en) | Environmental protection type under-well formation fracturing device | |
| CN103061732B (en) | Hydraulic fracturing method of 2-3 meter hard medium sandstone stratum of roof of coal seam | |
| CN108930536A (en) | A kind of method of gob side entry retaining first advance high pressure water injection fracturing tight roof | |
| CN115749855A (en) | Method for recovering fault coal pillar resources based on advanced pre-grouting | |
| Yang et al. | Application cumulative tensile explosions for roof cutting in Chinese underground coal mines | |
| CN105952448A (en) | Horizontal fragmentation hydrofracturing chemical modification method for lamprophyres in thick coal seam | |
| CN109667569A (en) | Caving Roof Coal Mining Face coal caving ability Enhancement Method | |
| CN109779634B (en) | Method for determining position of fractured hard top plate of coal mine ground vertical well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 030600, 209, University street, Yuci District, Shanxi, Jinzhong Patentee after: Taiyuan University of Technology Address before: 030024 Yingze, Shanxi Province, Berlin District, West Street, No. 79, No. Patentee before: Taiyuan University of Technology |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20210630 |