CN104612753A - Closing-blocking-draining combined water prevention and control method for Maokou limestone underground grouting and closure - Google Patents
Closing-blocking-draining combined water prevention and control method for Maokou limestone underground grouting and closure Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 77
- 239000006028 limestone Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000002265 prevention Effects 0.000 title claims abstract description 25
- 238000005065 mining Methods 0.000 claims abstract description 35
- 238000005265 energy consumption Methods 0.000 claims abstract description 27
- 230000005611 electricity Effects 0.000 claims abstract description 19
- 238000011161 development Methods 0.000 claims abstract description 14
- 238000013316 zoning Methods 0.000 claims abstract description 10
- 238000013461 design Methods 0.000 claims abstract description 8
- 239000003673 groundwater Substances 0.000 claims description 25
- 238000007569 slipcasting Methods 0.000 claims description 16
- 230000000994 depressogenic effect Effects 0.000 claims description 15
- 230000008595 infiltration Effects 0.000 claims description 14
- 238000001764 infiltration Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 8
- 230000010339 dilation Effects 0.000 claims description 7
- 239000012466 permeate Substances 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
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- 239000002131 composite material Substances 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 3
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- 238000004458 analytical method Methods 0.000 description 2
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- 238000013459 approach Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000013439 planning Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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- 230000008439 repair process Effects 0.000 description 1
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- 239000011435 rock Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
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Abstract
The invention discloses a closing-blocking-draining combined water prevention and control method for Maokou limestone underground grouting and closure. The method includes the first step that an underground mining area which is high in energy consumption and poor in safety power supply and drainage condition is closed; the second step that the elevation range of a karst development vertical zoning area of Maokou limestone is determined; the third step that in an underlaying composite anticline bottom plate of the Maokou limestone in the closed mining area which is high in energy consumption and poor in safety power supply and drainage condition, a secondary anticlinal rise portion nearest to an underground water supply area is selected as an underground grouting design target area; the fourth step that the depth and orientation of underground grouting holes of the Maokou limestone are determined; the fifth step that underground water of the underground Maokou limestone is intercepted; the sixth step that the water is drained at a electricity price valley time period. The method can prevent the accident of water inrush, reduce the possibility of karst surface subsidence, and can save a great number of electricity costs and improve economic benefits.
Description
Technical field
The present invention relates to the method for water prevention in a kind of colliery, especially relate to the water prevention method of pass-stifled-lean phase combination that a kind of maokou limestone underground grouting dams.
Background technology
South China coalfield belongs to Huanan Late upper permian coalfield, and seat earth is mostly maokou limestone aquifer, and its hydrogeological conditions is often between extremely between complexity-Midpoint type.-2012 years calendar year 2001s there is water inrush accident 179 in national colliery, and death toll 1598 people, wherein southern colliery occurs 96, and dead 917 people, account for 53.6% and 57.4% respectively.Water inrush accident causes great casualties, property loss and serious social and environmental problems.The maokou limestone mine water disaster control of current southern colliery generally takes ground leak stopping, down-hole forced-ventilated, based on the control measures arranged.Due to maokou limestone mine hydrogeology complicated condition, destroy or the karst aquifer affected, old empty water, surface water by digging, its nourishment condition is fine, and Source Of Supply is extremely abundant, and water bursting in mine is frequent, and govern compositive amount is large, and effect is poor.
On the basis of long-term work practice, water prevention worker has successively explored the approaches and methods of some water hazard prediction in harnessing the river in colliery, and " Draining hook " and " grouting for water blocking " is two large-engineering measures of mine water control.The selective dependency of the technical method of water hazard prediction in fully realizing hydrogeological conditions, simultaneously with reference to the monitoring information of water inrush precursor.For the water inrush accident that some are disastrous, in order to rescue and relief work, mostly take the method for grouting for water blocking.But often cause engineering to repair again or the waste of water resource and pollution afterwards.There is limited evidence currently of has colliery can from the overall water prevention angle of mine, and become water barrier by aquifer slip casting modification, the carrying out realizing mine groundwater is rationally dammed, and carries out integrated planning to the discharge of full ore deposit underground water.Existing underground grouting water blockoff stopped flow technique, mainly for the Ordovician limestone in northern mining area, is all do not consider the drainage after groundwater trapping for the purpose of water blockoff.
For southern colliery, the karsts developing area in maokou limestone aquifer is mostly in vertical zoning territory characteristic, and in the process that mine open up to deep, many inflow rate of mine water change comparatively obvious with different geohydrologic unit.Mine floor is subject to repeatedly strong tectonism, mostly defines complicated duplexsyncline structure.Duplexsyncline is by some subsidiary anticlines, to the large-scale synclinal structure tiltedly combined, wherein the spine of same fold to be highest portion position, the groove portion of subsidiary anticline protuberance the be secondary minimum position to oblique depression.The stratum of this complicated structure is Middle P ermian maokou limestone, and karst is generally comparatively grown, and underground water is very abundant.How to make full use of karsts developing area vertical zoning territory characteristic and the duplexsyncline geological structure in maokou limestone aquifer, southern colliery, the forced-ventilated drainage of correcting one's mistakes simply is the guarded drainage mode that pass-stifled-lean phase combines, well ability is protected safely to promote mine guarded drainage, improving mine economic profit, is the key subjects of worth research and development.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the water prevention method of pass-stifled-lean phase combination that a kind of maokou limestone underground grouting dams, it can take precautions against water inrush accident; Reduce the possibility that the earth's surface subside of carst occurs, and a large amount of electricity charge can be saved, increase economic efficiency.
The technical solution used in the present invention, comprises the steps:
(1) exploiting field of high energy consumption, safe power supply drainage condition difference under closed-in well;
(2) elevation range in maokou limestone karsts developing area vertical zoning territory is determined;
(3) in the maokou limestone duplexsyncline base plate underlied in the exploiting field of buttoned-up down-hole high energy consumption, safe power supply drainage condition difference, choose the subsidiary anticline ridge nearest apart from infiltration area and design target area as underground grouting;
(4) degree of depth and the orientation in maokou limestone underground grouting hole is determined;
(5) maokou limestone underground water under catchpit;
(6) electricity price low-valley interval draining.
The water prevention method that the pass that above-mentioned maokou limestone underground grouting dams-stifled-lean phase combines, the specific operation process of step (1) is as follows: analyzed by the statistics for many years of the coal mining output to Nei Ge exploiting field, mining area, displacement and water yield, determine the exploiting field of down-hole high energy consumption, safe power supply drainage condition difference, it is forever closed, and withdraws from all devices of closing exploiting field.
The water prevention method that the pass that above-mentioned maokou limestone underground grouting dams-stifled-lean phase combines, the specific operation process of step (2) is as follows: by holing to mining area maokou limestone, analyze solution cavity rate along the Changing Pattern on stratum, obtain maokou limestone karst development degree three band domain in the vertical direction: solution cavity development belt, fracture extension zone and karst agensis band; According to maokou limestone karstic development pattern, determine that mine hydrogeology condition line of demarcation is the interface of fracture extension zone and karst agensis band.
The water prevention method that the pass that above-mentioned maokou limestone underground grouting dams-stifled-lean phase combines, the specific operation process of step (3) is as follows: find out groundwater in mining area feeding area, runoff zones, stratigraphic sequence and geological structure, in the maokou limestone duplexsyncline base plate underlied in the exploiting field of buttoned-up down-hole high energy consumption, safe power supply drainage condition difference, choose and design target area apart from the nearest subsidiary anticline ridge in infiltration area as underground grouting, at least exist between above-mentioned subsidiary anticline ridge and infiltration area one secondary to oblique depressed area.
The water prevention method that the pass that the slurry of above-mentioned maokou limestone down-hole dams-stifled-lean phase combines, the specific operation process of step (4) is as follows: utilize karsts developing area vertical zonality, determine the degree of depth and the orientation of each injected hole, double dislocation mode is adopted to arrange inlet well in the plane by the principle of " first reconnoitre hole, grouting behind shaft or drift lining hole, a hole are multiplex ", the degree of depth of injected hole should surmount mine hydrogeology condition line of demarcation, and the azimuth of injected hole controls 65
o~ 85
obetween, the spacing of injected hole is less than 2 times of slurry dilation angle.
The water prevention method that the pass that above-mentioned maokou limestone underground grouting dams-stifled-lean phase combines, the specific operation process of step (5) is as follows: in the subsidiary anticline ridge slip casting of described maokou limestone duplexsyncline, the subsidiary anticline axle portion near zone of described maokou limestone duplexsyncline is transformed into water proof band, underground water is enclosed between described subsidiary anticline ridge and infiltration area, and it is secondary in oblique depressed area apart from nearest one of subsidiary anticline ridge, underground water also pours in buttoned-up down-hole high energy consumption by projective water point, the exploiting field of safe power supply drainage condition difference, groundwater trapping, in slip casting tunnel level, stops superficial part one step underground water to permeate to deep.
The water prevention method that the pass that above-mentioned maokou limestone underground grouting dams-stifled-lean phase combines, the specific operation process of step (6) is as follows: due to the existence of water proof band, secondaryly in oblique depressed area, lie prostrate buttoned-up high energy consumption, the exploiting field of safe power supply drainage condition difference becomes in fact the huge sump in mining area, during night shift, underground water is stored in huge sump, mornig shift electricity price low-valley interval, drains into earth's surface by the underground water stored in huge sump.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is directed to maokou limestone base plate karsts developing area vertical zoning territory, southern colliery characteristic to propose with the geological structure with duplexsyncline, high energy consumption under closed-in well, the exploiting field (i.e. "Off" in the water prevention method that pass-stifled-lean phase combines) of safe power supply drainage condition difference, underground grouting is implemented at the subsidiary anticline ridge of maokou limestone duplexsyncline base plate, by secondary to oblique depressed area between subsidiary anticline ridge and infiltration area of groundwater trapping, and pour in buttoned-up down-hole high energy consumption by projective water point, the exploiting field (i.e. " blocking up " in the water prevention method that pass-stifled-lean phase combines) of safe power supply drainage condition difference, the present invention by groundwater trapping in slip casting tunnel level, superficial part underground water is stoped to permeate to deep, the water yield of lower horizon mining is greatly reduced, mine groundwater is raised to slip casting tunnel level, reduce mining area maokou limestone dewatering funnel area, greatly reduce the possibility that the earth's surface subside of carst occurs, the present invention, night shift period underground water store in secondary lie prostrate to close in exploiting field in oblique depressed area (become in fact the huge sump in mining area), mornig shift electricity price low-valley interval, drains into earth's surface (i.e. " dredging " in the water prevention method that pass-stifled-lean phase combines) by storing in the underground water of huge sump.Because karstic ground water dams in slip casting tunnel level, greatly reduce draining lift, save a large amount of electricity charge, increase economic efficiency.
Accompanying drawing explanation
Fig. 1 maokou limestone duplexsyncline board structure and karsts developing area vertical zoning territory schematic diagram.
The water prevention schematic diagram that the pass that Fig. 2 maokou limestone duplexsyncline ridge underground grouting dams-stifled-lean phase combines.
Fig. 3 underground grouting pore size distribution schematic diagram.
Fig. 4 is the A-A sectional view in Fig. 2.
Fig. 5 is the B-B sectional view in Fig. 3.
1, high energy consumption, the exploiting field 2 of safe power supply drainage condition difference, solution cavity development belt 3, fracture extension zone 4, karst agensis band 5, mine hydrogeology condition line of demarcation 6, subsidiary anticline ridge 7, the injected hole degree of depth 8, water proof band 9, projective water point 10, slip casting tunnel 11, lower level 12, huge sump 13, draining lift 14, injected hole 15, slurry dilation angle 16, top board 17, drainage line 18, injected hole azimuth 19, subsidiary anticline 20, secondary to oblique 21, spine 22, groove portion 23, infiltration area 24, maokou limestone duplexsyncline base plate 25, secondary to oblique depressed area 26, coal measure strata.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described further.
Colliery, south maokou limestone floor water-bearing rock is subject to repeatedly strong tectonism, mostly define complicated duplexsyncline structure, described duplexsyncline structure refers to by some subsidiary anticlines 19, the secondary large-scale synclinal structure combined to oblique 20, and highest portion position, groove portion 22 that wherein the spine 21 of same fold swell for subsidiary anticline are secondary to oblique minimum position of caving in.The present invention makes full use of karsts developing area vertical zoning territory characteristic and the duplexsyncline geological structure in maokou limestone aquifer, southern colliery, the forced-ventilated drainage of correcting one's mistakes simply is the guarded drainage mode that pass-stifled-lean phase combines, greatly promote mine guarded drainage and protect safely well ability, especially big raising mine economic profit.Specific implementation method is as follows:
(1) exploiting field of high energy consumption, safe power supply drainage condition difference under closed-in well.Analyzed by the statistics for many years of the coal mining output to Nei Ge exploiting field, mining area, displacement and water yield, determine the exploiting field 1 of down-hole high energy consumption, safe power supply drainage condition difference, it is forever closed, and withdraw from all devices of closing exploiting field.
(2) elevation range in maokou limestone karsts developing area vertical zoning territory is determined.By holing to mining area maokou limestone, analyze the Changing Pattern of solution cavity rate along stratum, obtain maokou limestone karst development degree three band domain in the vertical direction: solution cavity development belt 2, fracture extension zone 3 and karst agensis band 4, more develop toward deep according to maokou limestone, the Changing Pattern that solution cavity cranny development rate is lower, determines that mine hydrogeology condition line of demarcation 5 is the interface of fracture extension zone and karst agensis band.
(3) in the maokou limestone duplexsyncline base plate 24 underlied in the exploiting field 1 of buttoned-up down-hole high energy consumption, safe power supply drainage condition difference, choose the subsidiary anticline ridge 6 nearest from infiltration area 23 as underground grouting design target area, further, at least exist between above-mentioned subsidiary anticline ridge 6 and infiltration area 23 one secondary to oblique depressed area 25.
(4) degree of depth and the orientation in maokou limestone underground grouting hole is determined.According to karsts developing area vertical zonality and slurry dilation angle 15, determine the spacing of the injected hole degree of depth 7 of each injected hole 14, injected hole azimuth 18 and injected hole, by the principle of " first reconnoitre hole, grouting behind shaft or drift lining hole, a hole are multiplex ", double dislocation mode is adopted to arrange injected hole in the plane, the injected hole degree of depth 7 should surmount hydrogeological conditions line of demarcation 5, and injected hole azimuth 18 controls 65
o~ 85
obetween, the spacing of injected hole is less than 2 times of slurry dilation angle 15.
(5) maokou limestone underground water under catchpit.The subsidiary anticline ridge 6 of above-mentioned maokou limestone duplexsyncline chooses suitable slip casting tunnel 10, slip casting is carried out to subsidiary anticline axle region, subsidiary anticline axle portion near zone is transformed into water proof band 8, underground water is enclosed in from nearest one of subsidiary anticline ridge 6 secondary in oblique depressed area 25, and underground water also pours in the secondary exploiting field 1 lying prostrate buttoned-up high energy consumption, safe power supply drainage condition difference in oblique depressed area 25 by projective water point 9; Such groundwater trapping, in slip casting tunnel 10 level, stops superficial part underground water to permeate to deep.The water yield that lower level 11 is exploited greatly reduces, and mine groundwater is raised to slip casting tunnel 10 level, reduces mining area maokou limestone dewatering funnel area, greatly reduces the possibility that the earth's surface subside of carst occurs.
(6) electricity price low-valley interval draining.Due to the existence of water proof band 8, secondary lie prostrate in oblique depressed area 25 close high energy consumption, the exploiting field 1 of safe power supply drainage condition difference becomes in fact the huge sump 12 in mining area, the night shift period, underground water stores in above-mentioned huge sump 12, mornig shift electricity price low-valley interval, drains into earth's surface by the underground water stored in huge sump 12.After maokou limestone groundwater trapping, underground water stores in above-mentioned huge sump 12, stops superficial part underground water to permeate to deep, huge sump 12 to the draining lift 13 of top drainage than the draining lift much less of deep mining.Save a large amount of electric energy, and draining during electricity price low ebb, greatly save the electricity charge, increase economic efficiency.
Embodiment:
The administrative Meitanba mining area of dark fund epoch Changsha, Hunan mining industry Co., Ltd is a well-known throughout the country inundation mine area, the existing five mu of punchings in mining area, Xifeng logical sequence, three pairs, the pool, Zhushan County mine, Mine area geologic structure is medium, hydrogeological conditions is extremely complicated, along with the continuous pit haulage system of mine, mine dewatering funnel constantly expands, and drainage area now reaches 368km
2.Enter the deep mining stage in later stage, cost of production remains high, waterproof protects well arduous task, pressure is huge, only have harnessed the river by earth's surface, the exploiting field of closed-in well lower part high energy consumption, safe power supply drainage condition difference, the mining area of essential safety, high benefit could be reached comprehensively, radiated vigour in mining area.Enforcement region of the present invention is Dong Yi exploiting field, colliery, the pool, Zhushan County.This region is positioned at the most the east in Meitanba mining area, is the main feeding area of groundwater in mining area, has Yang Quan lake groundwater run-off band, great achievement bridge groundwater run-off band, the common supply of He Shiqiao groundwater run-off band, abundant water.It is mild that Use of Geophysical Data shows this groundwater level, and hydraulic gradient is 3-5 ‰, and more past east, this region, catchment area is larger.And disclose through down-hole, eastern seven transportation roadway--170 flowing water lanes, crossdrift-34, colliery, the pool, Zhushan County-170, for the subsidiary anticline ridge of the pool, Zhushan County-He Jia gulf duplexsyncline, this position underlies Dong Yi exploiting field, colliery, the pool, Zhushan County, Dong Yi exploiting field, colliery, the pool, Zhushan County maokou limestone duplexsyncline base plate, the subsidiary anticline ridge nearest apart from the main feeding area of eastern subterranean water.Adopt the present invention, the concrete steps for the treatment of groundwater are as follows:
(1) exploiting field that high energy consumption under closed-in well, safe power supply drainage condition are poor.The exploiting field 1 that Dong Yi exploiting field, colliery, the pool, Zhushan County comprises-235 levels ,-207 levels are high energy consumption, safe power supply drainage condition is poor.The existing beveloped coal reserve in Dong Yi exploiting field, colliery, the pool, whole Zhushan County only 7.0 ten thousand tons, and eastern wing exploiting field inflow rate of mine water is 8800m to the maximum
3/ h, average out to 6400 m
3/ h, accounts for 70% of full company inflow rate of mine water.First close-235 horizontal Dong great lane floodgate wall gate valves, withdraw from-235 horizontal all devices as far as possible.According to the projective water point water yield mutation analysis of east, colliery, the pool, Zhushan County wing, progressively close the whole exploiting field of the wing, east, colliery, the pool, Zhushan County.
(2) elevation range in maokou limestone karsts developing area vertical zoning territory is determined.The solution cavity rate obtaining down-hole different level according to Meitanba mining area boring is respectively :-120m ~-200 m solution cavity rate is 2.1%,-200 m ~-250 m solution cavity rates are 1.31%, ,-250 m ~-300 m solution cavity rates are 0.14% ,-300 ~-400 solution cavity rates is 0.1%.The elevation range obtaining the solution cavity development belt 2 in this mining area from drilling result analysis is :-120m ~-200 m, and the elevation range of fracture extension zone 3 is :-200 m ~-240 m, and karst agensis band 4 elevation range is: the region of-240 below m.Visible maokou limestone is more toward deep development, and the Changing Pattern that solution cavity cranny development rate is lower, determines that mine hydrogeology condition line of demarcation 5 is located for absolute altitude-240m.
(3) in the maokou limestone duplexsyncline base plate 24 underlied in the exploiting field of buttoned-up down-hole high energy consumption, safe power supply drainage condition difference, the subsidiary anticline ridge 6 nearest apart from infiltration area 23 is chosen as underground grouting design target area.Main nourishment source, Meitanba mining area is the ground such as Yang Quan lake, great achievement bridge, has Yang Quan lake groundwater run-off band, great achievement bridge groundwater run-off band and the common supply of He Shiqiao groundwater run-off band, and the water yield is very abundant, and the average hydraulic gradient is 5 ‰.Eastern seven transportation roadway--170 flowing water lanes, crossdrift-34, colliery, the pool, Zhushan County-170, for the subsidiary anticline ridge 6 of the pool, Zhushan County-He Jia gulf duplexsyncline, this position underlies Dong Yi exploiting field, colliery, the pool, Zhushan County, it is the maokou limestone base plate duplexsyncline in Dong Yi exploiting field, colliery, the pool, Zhushan County, the subsidiary anticline ridge 6 nearest apart from the main feeding area of eastern subterranean water, playing " ridge ", " hump " and cross water bottleneck effect, is underground grouting design target area, maokou limestone tunnel.
(4) degree of depth and the orientation in maokou limestone underground grouting hole is determined.34 transportation roadway of colliery, the pool, Zhushan County absolute altitude-170m are in the subsidiary anticline ridge of the pool, Zhushan County-He Jia gulf duplexsyncline, it can be used as slip casting tunnel 10, carry out underground grouting, according to karsts developing area vertical zonality and slurry dilation angle 15, determine that the injected hole degree of depth 7 is for 80m, the azimuth 18 of slip casting is about 75
o, injected hole spacing is 15m, and wherein injected hole degree of depth 80m surmounts hydrogeological conditions line of demarcation 5, by the principle of " first reconnoitre hole, grouting behind shaft or drift lining hole, a hole are multiplex ", adopts double dislocation mode to arrange injected hole in the plane.After slip casting completes, the subsidiary anticline axle portion near zone of maokou limestone duplexsyncline has been transformed into water proof band 8, water proof band 8 total length 450 meters.
(5) maokou limestone groundwater trapping.After the subsidiary anticline axle portion near zone of maokou limestone duplexsyncline is transformed into water proof band 8, it is secondary in oblique depressed area 25 that underground water is enclosed between subsidiary anticline ridge 6 and infiltration area, and the exploiting field 1 of buttoned-up high energy consumption, safe power supply drainage condition difference is poured in by projective water point 9, groundwater trapping is closed in exploiting field above-mentioned, thus stops superficial part underground water to permeate to deep.After maokou limestone groundwater trapping, the underground water outburst amount of east, colliery, the pool, Zhushan County wing absolute altitude-170m level reaches 2600 m
3/ h, and lower horizontal 11(i.e.-270 levels) water yield be only 700 m
3/ h.Because the underground water overwhelming majority is gushed out from east, colliery, the pool, Zhushan County wing-170m level, very little from the water yield of-270 levels, like this from mine to the lift of top drainage by minimizing about 100 meters.
(6) electricity price low-valley interval draining.Due to the existence of water proof band 8, secondary in oblique depressed area 25 volt buttoned-up high energy consumption, safe power supply drainage condition difference exploiting field 1 become in fact the huge sump 12 in mining area, night shift underground water stores in huge sump, cumulative volume about 30000 m
3, by 2600 m
3/ h flow can retaining 11.5 hours, and can realize night shift and stop draining, carry out retaining, morning electricity price low-valley interval drains, and compared with electricity price peak interval of time, adopts the draining of morning electricity price low-valley interval, and its draining electricity price differs from 0.4 yuan/degree.
Adopt the present invention, draining lift 100 meters can be reduced, electric energy 2732.6 ten thousand degree can be saved every year, reduce labour's recruitment 48 people, utilize the draining of electricity price low-valley interval, year can power cost saving 1,093 ten thousand yuan, simultaneously due to after the eastern wing closes, whole mining area draining cost reduces, can reduce total lease production, the Yanchang Area length of service, social benefit also clearly.
Claims (7)
1. the water prevention method that pass-stifled-lean phase that maokou limestone underground grouting dams combines, comprises the steps:
(1) exploiting field of high energy consumption, safe power supply drainage condition difference under closed-in well;
(2) elevation range in maokou limestone karsts developing area vertical zoning territory is determined;
(3) in the maokou limestone duplexsyncline base plate underlied in the exploiting field of buttoned-up down-hole high energy consumption, safe power supply drainage condition difference, choose the subsidiary anticline ridge nearest apart from infiltration area and design target area as underground grouting;
(4) degree of depth and the orientation in maokou limestone underground grouting hole is determined;
(5) maokou limestone underground water under catchpit;
(6) electricity price low-valley interval draining.
2. the water prevention method that pass-stifled-lean phase that maokou limestone underground grouting according to claim 1 dams combines, the specific operation process of step (1) is as follows: analyzed by the statistics for many years of the coal mining output to Nei Ge exploiting field, mining area, displacement and water yield, determine the exploiting field of down-hole high energy consumption, safe power supply drainage condition difference, it is forever closed, withdraws from all devices of closing exploiting field.
3. the water prevention method that pass-stifled-lean phase that maokou limestone underground grouting according to claim 1 dams combines, the specific operation process of step (2) is as follows: by holing to mining area maokou limestone, analyze solution cavity rate along the Changing Pattern on stratum, obtain maokou limestone karst development degree three band domain in the vertical direction: solution cavity development belt, fracture extension zone and karst agensis band; According to maokou limestone karstic development pattern, determine that mine hydrogeology condition line of demarcation is the interface of fracture extension zone and karst agensis band.
4. the water prevention method that pass-stifled-lean phase that maokou limestone underground grouting according to claim 1 dams combines, the specific operation process of step (3) is as follows: find out groundwater in mining area feeding area, runoff zones, stratigraphic sequence and geological structure, in buttoned-up down-hole high energy consumption, in the maokou limestone duplexsyncline base plate underlied in the exploiting field of safe power supply drainage condition difference, choose the subsidiary anticline ridge nearest apart from infiltration area and design target area as underground grouting, at least exist between above-mentioned subsidiary anticline ridge and infiltration area one secondary to oblique depressed area.
5. the water prevention method that pass-stifled-lean phase that maokou limestone underground grouting according to claim 1 dams combines, the specific operation process of step (4) is as follows: according to karsts developing area vertical zonality and slurry dilation angle, determine the degree of depth and the orientation of each injected hole, double dislocation mode is adopted to arrange inlet well in the plane by the principle of " first reconnoitre hole, grouting behind shaft or drift lining hole, a hole are multiplex ", the degree of depth of injected hole should surmount mine hydrogeology condition line of demarcation, and the azimuth of injected hole controls 65
o~ 85
obetween, the spacing of injected hole is less than 2 times of slurry dilation angle.
6. the water prevention method that pass-stifled-lean phase that maokou limestone underground grouting according to claim 1 dams combines, the specific operation process of step (5) is as follows: in the subsidiary anticline ridge slip casting of maokou limestone duplexsyncline, described subsidiary anticline axle portion near zone is transformed into water proof band, underground water is enclosed between subsidiary anticline ridge and infiltration area, and it is secondary in oblique depressed area from nearest one of subsidiary anticline ridge, underground water also pours in buttoned-up down-hole high energy consumption by projective water point, the exploiting field of safe power supply drainage condition difference, groundwater trapping, in slip casting tunnel level, stops superficial part one step underground water to permeate to deep.
7. the water prevention method that pass-stifled-lean phase that maokou limestone underground grouting according to claim 1 dams combines, the specific operation process of step (6) is as follows: due to the existence of water proof band, secondary volt in oblique depressed area closes the huge sump that exploiting field becomes in fact mining area, during night shift, underground water is stored in huge sump, mornig shift electricity price low-valley interval, drains into earth's surface by the underground water stored in huge sump.
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