CN112593853A - Construction method for coal mine waste filling and water-reducing mining - Google Patents
Construction method for coal mine waste filling and water-reducing mining Download PDFInfo
- Publication number
- CN112593853A CN112593853A CN202011477252.5A CN202011477252A CN112593853A CN 112593853 A CN112593853 A CN 112593853A CN 202011477252 A CN202011477252 A CN 202011477252A CN 112593853 A CN112593853 A CN 112593853A
- Authority
- CN
- China
- Prior art keywords
- water
- filling
- mining
- gangue
- mine
- 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
- 238000005065 mining Methods 0.000 title claims abstract description 94
- 238000010276 construction Methods 0.000 title claims abstract description 57
- 239000003245 coal Substances 0.000 title claims abstract description 53
- 239000002699 waste material Substances 0.000 title claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 141
- 238000005553 drilling Methods 0.000 claims abstract description 118
- 239000010878 waste rock Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000002002 slurry Substances 0.000 claims description 53
- 239000000843 powder Substances 0.000 claims description 44
- 239000004568 cement Substances 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 16
- 238000009792 diffusion process Methods 0.000 claims description 10
- 239000011435 rock Substances 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000011161 development Methods 0.000 claims description 6
- 230000002706 hydrostatic effect Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000008021 deposition Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 230000001131 transforming effect Effects 0.000 claims description 2
- 239000011440 grout Substances 0.000 claims 2
- 238000002347 injection Methods 0.000 claims 2
- 239000007924 injection Substances 0.000 claims 2
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 206010017076 Fracture Diseases 0.000 description 12
- 206010013883 Dwarfism Diseases 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 235000008001 rakum palm Nutrition 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- 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
-
- 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
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Remote Sensing (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a coal mine gangue filling and water-reducing mining construction method, and belongs to the technical field of coal mine green mining. The method utilizes directional drilling construction to reach the vicinity of the top boundary of the water-flowing fractured zone after the mining of the working face, utilizes a ground gangue macadam system and a ground slurrying system to fill gangue into the water-flowing fractured zone, carries out grouting reinforcement after the gangue is filled, constructs a continuous waterproof wall on the water-filling boundary of a main water-filling aquifer while treating mine gangue, forms a complete waterproof zone on the stoping boundary along with the continuous expansion of the working face and the mining range of the mine, and cuts off a water-filling source of the main water-filling aquifer for filling water into the mine. The method realizes the cooperation of mine waste rock treatment and water-reducing mining, meets the requirement of zero discharge of waste rock and mine water, greatly promotes the construction pace of green mines, creates a new green mining mode of coal fields, and is suitable for the fields of coal mines, metallurgical mines, underground engineering and the like.
Description
Technical Field
The invention belongs to the technical field of green mining of coal mines, and relates to a construction method for filling gangue and reducing water in a coal mine.
Background
Most mines face a great deal of gangue at presentThe difficulties of no stone removal treatment and no mine water discharge are seriously restricted on the high yield, high efficiency and healthy sustainable development of mines. At present, various methods are tried to treat gangue and mine water in existing mined mines, in the aspect of gangue treatment, some mines are tried to adopt a filling mining technology to directly fill behind a goaf, further the gangue amount is consumed, the influence of a process and filling equipment is caused, continuous filling and full-equal-height filling cannot be realized, a certain amount of gangue can be treated, but the height of a water-guiding fracture zone is reduced, water-reducing and water-controlling mining cannot be realized, according to the successful experience of the existing advanced mines, filling mining is adopted to be about 40% of the yield of normal mining production coal, the economic benefit of the mines is seriously influenced, and the high-yield and high-efficiency targets cannot be realized; in the aspect of mine water treatment, passive prevention is mainly adopted for deep dwarfism coal seam roof sandstone water prevention, namely, a drainage depressurization mode is adopted to drain a roof water-filled aquifer in advance before roadway excavation and working face recovery so as to ensure the safety of roadway excavation and working face recovery, but with the increase of excavation roadways and the increase of working face mining area, the mine water inflow is increased day by day, and the water inflow of a plurality of mines reaches 35000m3More than/d, mine water treatment mainly adopts underground purification and then is taken, and is used for mine domestic water, greening and industrial field production water after ground treatment, and the like, and for large water mines, a large amount of residual water can only be discharged on the ground after comprehensive utilization, and the environmental negative effect is increasingly prominent. In addition, some mines try to adopt a recharge technology to treat mine water, namely, ground drilling is adopted to fill a water-bearing layer which can be injected into a deep floor of a coal seam, and the recharge water quantity is generally 2400m according to engineering practice3About/d, the amount of reinjection water is limited, and the problem of a large water mine cannot be fundamentally solved. Therefore, the safe and green mining of coal is realized, the gangue is reasonably treated, and the water filling amount of a mine is reduced, so that the important problem to be solved urgently is solved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a construction method for filling and water-reducing mining of coal mine waste rock, which can reduce the water filling amount of a mine while processing the waste rock, thereby realizing green mining.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the invention discloses a construction method for coal mine gangue filling and water-reducing mining, which comprises the following steps: determining a main water-filling aquifer of the mine area based on the deposition water-controlling characteristics and the water-filling rule of the mine area; constructing a main directional drilling hole of a ground directional drilling machine in a main water-filled water-containing layer in a mine area by utilizing a directional drilling technology, and determining horizontal and vertical directional drilling hole branches of the main directional drilling hole section by combining the diffusion radius of slurry of gangue powder slurry at the main directional drilling hole section;
injecting gangue powder slurry into the directional drilling branch drill hole, and filling the gangue powder slurry into a goaf and a water-guiding fracture zone of a mine area by using a gangue conveying system; and after filling, filling and reinforcing the main water-filled aquifer by using the cement paste-accelerator composite slurry, and transforming the main water-filled aquifer into a water-resisting layer to realize the construction method for filling the gangue and reducing water mining in the coal mine.
Preferably, the construction method for coal mine gangue filling and water-reducing mining specifically comprises the following steps:
1) determining a direct water-filled aquifer and a water-resisting layer within the range of the water-flowing fractured zone according to the spatial structures of all stratums of the mine zone and by combining the development height of the caving zone after mining in the mine zone and the position of the top boundary of the water-flowing fractured zone; analyzing the water-rich performance of the direct water-filling aquifer, analyzing the water-resisting performance of the water-resisting layer to obtain the hydraulic connection and mining damage degree between the indirect water-filling aquifer and the direct water-filling aquifer, and determining the main water-filling aquifer in the mine area;
2) determining the mining damage range of the rock stratum of the mine area according to the mining bedrock shifting collapse angle and the mining new boundary stratum collapse angle of the mine area, and determining the main hole position of the directional drilling hole of the ground directional drilling machine by combining the obtained mining damage range of the rock stratum of the mine area and the slurry diffusion radius of the gangue powder slurry; determining the track of the underground directional drilling branch drill hole by combining the spatial structures of all stratums of the mine area and the vertical depth and turning radius of the main hole of the directional drilling hole, and determining the vertical construction number of the directional drilling branch drill hole by combining the thickness of the main water-filled aquifer; laying the horizontal spacing of the directional drilling branch drill holes along the stoping direction of the stoping face by combining the working stoping length and the continuing condition of the mine;
3) after the directional drilling main hole and the directional drilling branch drilling construction are finished, gangue powder slurry is injected into the area below the top boundary of the water-flowing fractured zone by using a grouting system, a goaf and the water-flowing fractured zone of a mine area are filled, the filling is finished after the filling is full, then the main water-filled aquifer is filled and reinforced by using cement slurry-accelerator composite slurry, the main water-filled aquifer is transformed into a water-resisting layer, and the construction method for filling and reducing the water in the coal mine is realized.
Further preferably, the mine area is suitable for deep dwarfism coal fields.
Further preferably, after the gangue powder slurry is injected, stopping injecting the gangue powder slurry when the orifice pressure of the main hole of the directional drilling hole reaches 1.0 time of the hydrostatic pressure of the main water-filled aquifer; and after the cement paste-accelerator composite slurry is injected, stopping injecting the cement paste-accelerator composite slurry when the orifice pressure of the main hole of the directional drilling hole reaches 1.5 times of the hydrostatic pressure of the main water-filled aquifer.
Further preferably, the horizontal spacing of the directional drilling branch boreholes is twice the slurry dispersion radius.
Further preferably, the gangue is ground by a ground gangue crushing system to obtain gangue powder, and the gangue powder is made into gangue powder slurry by mine water.
Wherein the diameter of the waste rock powder is not more than 5mm, and the specific gravity of the waste rock powder slurry is 1.5-1.8.
Preferably, directional drilling and branch drilling are respectively and sequentially carried out from the cutting hole to the direction of the withdrawing channel and the direction of the working face connection, then gangue powder slurry filling and cement slurry-accelerator composite slurry filling and reinforcing are carried out, and a local water-resisting layer is formed into a water-resisting belt which is continuous in the whole mine area boundary.
Further preferably, the ends of the directional drilling branch bores are plugged by lowering a bridge device.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a construction method for filling coal mine waste rock and reducing water mining, which integrates waste rock treatment and reducing water mining, can achieve the purposes of waste rock treatment and reducing water mining, utilizes a ground directional drilling branch drilling construction technology, has two purposes in one hole, namely, a main hole is drilled from a ground construction directional drilling hole to a main water-filled aquifer of a coal seam roof, then branch drilling holes are drilled along the construction level and the vertical direction of the main water-filled aquifer, gangue powder slurry is prepared after the gangue is ground and filled into a goaf and a water-flowing fractured zone, cement slurry-accelerator composite slurry is injected to block the mining fracture and primary pores of the main water-filled aquifer after the mining fracture above a working surface is filled, and then the main water-filled aquifer is transformed into a water-resisting layer, and a water-filling channel from the main water-filled aquifer to the goaf is blocked, so that the aims of waste rock treatment and water-reducing mining are fulfilled.
Furthermore, a bridge device is arranged at the tail end of the directional drilling branch drill hole for plugging, and then cement slurry-accelerator composite slurry is injected, so that the situation that gangue powder slurry in a water diversion fracture zone is not filled firmly can be avoided.
In conclusion, the construction method for coal mine gangue filling and water-reducing mining has the following advantages:
1. the directional drilling technology is utilized to fill the gangue, and the directional drilling technology is simultaneously used for grouting to build a continuous waterproof strip, so that 'one hole is dual-purpose'.
2. And a continuous water-resisting strip is constructed at the edge of the water-flowing fractured zone, and the source cutoff and the closure of the main water-filled aquifer are carried out, so that the aim of regional treatment of the main water-filled aquifer is fulfilled, and the water-reducing exploitation is further realized. And meanwhile, a water filling source is blocked to fill water into the mine area, so that the aim of reducing water and exploiting while treating the gangue is fulfilled, and the aim of green exploitation is fulfilled.
3. A new green mining mode of deep Jurassic coal field is innovated, and waste rock treatment and water damage prevention are cooperated.
Drawings
FIG. 1 is a cross-sectional view of the gangue filling and water-reducing mining construction process of the present invention;
FIG. 2 is a plan view of the gangue filling and water reducing mining construction process of the present invention;
FIG. 3 is a three-view illustration of the gangue filling and water-reducing mining construction process of the present invention;
FIG. 4 is a plan view of the area of the gangue filling and water reducing mining construction process of the present invention.
In the figure: 1-the fourth series of aqueous layers of sala ussuriensis; 2-aqueous layer of rocky river system; 3-the relative water-resisting layer of Jurasma group; 4-the watery layer of the Jurassic system; 5-Yanan group water-resisting layer; 6-Yanan group aquifer; 7-Yanan group aquifer; 8-Yanan group water-resisting layer; 9-shifting collapse angle of bedrock after mining; 10-the development height of the falling zone after the picking; 11-a directional drilling rig on the ground; 12-directional drilling of a main bore casing; 13-directional drilling of the main hole; 14-new boundary stratum collapse angle after mining; 15-directional drilling and branch drilling; 16-water flowing fractured zone top boundary; 17-a goaf; 18-successive working faces; 19-stoping direction of stoping face; 20-system roadway; 21-a bridge arrangement; 22-mine boundary; 23-a vertical shaft; 24-a water-stop strip; 151-first directional drilling branch drilling; 152-a second directional drilling branch bore; 153-third directional drilling branch borehole; 154-fourth directional drilling branch bore.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention discloses a construction method for filling gangue and reducing water mining of a coal mine, aiming at treating the gangue and reducing the water filling amount of a mine for the coal mine, thereby realizing green mining. The construction method for filling gangue and reducing water mining of the coal mine comprises the following steps: based on the deposition water control characteristics and the water filling rule of the sandstone on the coal seam roof of the deep Jurassic coal field, a horizontal main hole is constructed in a stable main water filling water-containing layer outside a rock shifting and sinking boundary of a stoping working surface by utilizing directional drilling, horizontal and vertical branch drilling holes are sequentially constructed in the horizontal main hole section in the stoping working surface stoping direction 19 in the water guiding fractured zone range after stoping the working surface according to the sizes of gangue filling and slurry diffusion radius, then crushed gangue powder is injected into the branch drilling holes, the gangue powder is filled into the water guiding fractured zone and the mining fractured fractures and the primary fractures (water direction) outside the water guiding fractured zone and the primary fractures by utilizing a gangue conveying system, and after the mining fractured fractures are filled, a mixed slurry of cement and a quick-setting admixture is injected into the mining fractured and the primary fractures at the edge of the water guiding fractured zone by utilizing a ground cement slurry conveying system to plug, so as to form a water blocking zone, and meanwhile, the water-filled aquifer is reformed into a water-resisting layer. And if the amount of mine waste rock cannot meet the filling requirement, namely the waste rock in the water flowing fractured zone is not filled firmly, a bridge device is put into the tail end of the branch drill hole for plugging, and then the mixed slurry of cement and an accelerator is injected, so that a water-resisting layer is formed. And respectively constructing branch drill holes from the cutting hole to the direction of the withdrawing channel and the direction of the working face continuing in sequence, then performing gangue powder filling and composite slurry filling reinforcement, and finally blocking a water filling source from filling water into the mine by a continuous water-stop strip 24 formed on the whole mine boundary 22 so as to achieve the purposes of gangue treatment and water reduction mining, thereby realizing the aim of green mining.
Compared with filling mining, the passive gangue filling mining mode is changed into active gangue processing, the filling along with mining and filling after mining is changed, the influence on coal mining efficiency caused by a filling process is reduced, high yield and high efficiency of a mine are realized, and a single gangue filling mining mode is changed into gangue filling and mine water prevention and control cooperation.
Compared with water retention mining, the water retention mining of the invention has the advantages that firstly, the height of the water-conducting fractured zone is reduced, so that the height of the water-conducting fractured zone does not reach the aquifer with stronger water-rich property of the aquifer, and secondly, the aquifer with water supply significance is protected.
Compared with the comprehensive utilization of mine water, the comprehensive utilization of the mine water generally adopts underground treatment and then taking, ground treatment and then industrial plant areas, living, greening and the like, but because the underground taking and the ground plant area living and greening use amount are smaller, the industrial plant areas need to be matched with plant areas with sufficient scale and long-distance hydrophobic pipelines need to be built, the problem of large water inflow of mines is solved essentially, the treatment is carried out from the source, the regional treatment is realized, the aim of water reduction and mining is fulfilled, the water inflow of the mines is reduced, the zero discharge of gangue is realized, and the comprehensive utilization of the mine water has an important effect on the construction of green mines.
The invention is described in further detail below with reference to the accompanying drawings:
the construction method for filling and water-reducing mining of the coal mine waste rock is realized based on a ground waste rock crushing system, a ground slurrying system, a directional drilling construction process and a grouting process, and the ground waste rock crushing system, the ground slurrying system, the directional drilling construction process and the grouting system are mature systems and processes. Therefore, the invention mainly relates to a gangue filling and water-reducing mining construction method.
The construction method for filling the coal mine waste rock and reducing water mining comprises the following construction steps:
the first step is as follows: according to the thickness of the mined coal bed, determining the heights of the caving zone and the water flowing fractured zone after the coal bed is stoped by a theoretical formula, underground actual measurement and other methods, namely the development height 10 of the caving zone and the top boundary position of the water flowing fractured zone after the coal bed is stoped.
The second step is that: and (3) analyzing the space distribution, water enrichment, fillability and injectability of the main water-filled aquifer below the top boundary of the water-conducting fractured zone by combining the stratum structure of the mine, and selecting the gangue filling and grouting to build the continuous water-proof zone 24 as the main water-filled aquifer through the analysis of the supply relationship between the indirect water-filled aquifer and the main water-filled aquifer according to the water-proof performance of the water-proof layer and the influence degree of mining damage.
The third step: after the gangue filling and water-resisting strip 24 construction layer position is determined, directional drilling is designed according to the thickness of a main water-filled water-bearing layer, the diffusion radius of slurry, a base rock moving collapse angle 9 after mining, a new boundary stratum collapse angle 14 after mining and a collapse boundary stable rock stratum, and the construction parameters of a main directional drilling hole 13, a main directional drilling hole casing 12 and a branch directional drilling hole 15 are determined.
Specifically, the hole spacing of the directional drilling branch drill hole 15 is twice of the diffusion radius of grouting, and is usually 5-100 m.
Specifically, the slip casting diffusion radius is generally considered to be 10m, when the thickness of the main water-filled aquifer is less than 20m, only the first directional drilling branch drill hole 151 is arranged, when the thickness of the main water-filled aquifer is more than 20m and less than 40m, the first directional drilling branch drill hole 151 and the second directional drilling branch drill hole 152 are arranged, when the thickness of the main water-filled aquifer is more than 40m and less than 60m, the first directional drilling branch drill hole 151, the second directional drilling branch drill hole 152 and the third directional drilling branch drill hole 153 are arranged, and so on. As can be seen with reference to fig. 3.
The fourth step: after the directional drilling construction scheme and parameters are determined, grinding the gangue into gangue powder by using a ground gangue crushing system, wherein the gangue powder is not more than 5mm directly, then stirring the gangue powder and mine water to prepare gangue powder slurry, wherein the specific gravity of the gangue powder slurry is not less than 1.5, and then injecting the gangue powder slurry below a top boundary 16 of a water-guiding fractured zone through the main directional drilling hole 13, the first directional drilling hole branch drilling hole 151, the second directional drilling hole branch drilling hole 152, the third directional drilling hole branch drilling hole 153 and the fourth directional drilling hole branch drilling hole 154 by using a ground grouting system.
The fifth step: after the gangue powder slurry is injected, when the orifice pressure of the ground directional drilling main hole 13 reaches 1.0 time of the hydrostatic pressure of the main water-filled aquifer, the gangue powder slurry is stopped from being injected, then the ground grouting system is used for injecting the cement slurry-accelerator composite slurry to fill and reinforce the main water-filled aquifer, the mining cracks and the primary cracks are filled, and when the orifice pressure of the ground directional drilling main hole 13 reaches 1.5 times of the hydrostatic pressure of the main water-filled aquifer, the grouting is finished. If the amount of the gangue is limited and the goaf 17 cannot be filled, a bridge device 21 is put into the goaf through the main hole 13 of the ground directional drilling hole and the branch drilling hole 15 of the directional drilling hole to block a communication channel between the directional branch drilling hole and the water-flowing fractured zone, then the cement paste-accelerator composite slurry is directly injected, and the grouting is finished after the pressure reaches the standard.
And a sixth step: along with the continuous pushing and mining of the working face, the directional drilling branch drill hole 15 is continuously constructed, after the construction of the directional drilling branch drill hole 15 is finished, repeating the fourth step and the fifth step, when the mining length of the working face exceeds the construction distance of the directional drilling (the construction length of the directional branch drilling and the vertical depth ratio are 1.5:1), then the main hole 13 is directionally drilled on the ground again, the steps from three to five are repeated, finally, a complete continuous water-stop strip 24 is formed on the outer side of the stope face to stop the water supply from the main water-filled water-containing layer to the goaf 17, and after the stoping of one working face is finished and the stoping is continued to the working face 18, repeating the steps from three to six, finally forming a complete continuous waterproof strip 24 closed ring (see figure 4) near the boundary of the mine well field through the system roadway 20 and the vertical shaft 23, and completely cutting off the water supply source supplemented to the goaf 17 from the main water-filled water-containing layer to realize water-reducing mining.
The invention will be further described with reference to the following figures and specific examples:
the invention relates to a construction method for coal mine gangue filling and water-reducing mining, which specifically comprises the following steps:
1) according to the mine exploration report and the actually disclosed stratum data, determining the thickness and the spatial structure of the stratum of a fourth series of salary wusu aquifer 1, a chalk series luohu aquifer 2, a dwarvia series stable relative aquifer 3, a dwarvia series directly-falling aquifer 4, a Yanan series aquifer 5, a Yanan series aquifer 6, a Yanan series aquifer 7 and a Yanan series aquifer 8; as can be seen with reference to fig. 1;
2) calculating the development height 10 of the caving zone after mining and the position of the top boundary 16 of the water-flowing fractured zone by using a theoretical formula of 'three specifications' or underground actual detection data and combining the mining height of the coal bed, and determining a water-filled aquifer within the range of the water-flowing fractured zone corresponding to the spatial structure of the stratum: a dwarfism stramineus aquifer 4 and a Yanan aquifer 6;
3) by analyzing the water-rich property of a water-conducting fractured zone filled with a water aquifer, namely a Jurasia system directly-falling group aquifer 4 and a Yanan group aquifer 6 and the water-resisting property of a water-resisting layer, namely a Jurasia system stabilizing group relative water-resisting layer 3 and a Yanan group water-resisting layer 5, the hydraulic connection and mining damage degree between an indirect water-filled aquifer, namely a Chalco system aquifer 2, a direct water-filled aquifer, namely a Jurasia system directly-falling group aquifer and a Yanan group aquifer 6 is mastered, and the main water-filled aquifer filled with the mine water is the Jurasia system directly-falling group aquifer 4;
4) determining the mining damage range of the rock stratum according to the sizes of the bed rock shifting collapse angle 9 after the coal seam is mined and the stratum collapse angle 14 of the new boundary after the coal seam is mined, and designing the position of a main directional drilling hole 13 of a ground directional drilling machine 11 by combining the diffusion radius of gangue powder slurry; a directional drilling main hole sleeve 12 is arranged outside the directional drilling main hole 13;
5) according to the stratum space structure, the vertical depth and the turning radius of the main directional drilling hole 13 are combined, the track of the underground directional drilling branch drilling hole 15 is determined, and then the construction number of the directional drilling branch drilling hole 15 in the vertical direction is determined according to the thickness of the water-filled aquifer Jurassic system aquifer 4.
Specifically, in a specific embodiment, the number of directional drilling branch drill holes 15 in the vertical direction is four, and the directional drilling branch drill holes include a first directional drilling branch drill hole 151, a second directional drilling branch drill hole 152, a third directional drilling branch drill hole 153, and a fourth directional drilling branch drill hole 154.
6) Laying horizontal directional drilling branch drill holes 15 along the stoping direction 19 of the stoping working face by combining the working stoping length and the continuing condition of the mine, and obtaining the horizontal distance between the directional drilling branch drill holes 15 according to the construction test parameters; as can be seen with reference to fig. 2;
7) after the construction of the main directional drilling hole 13 and the branch directional drilling hole 15 is finished, grinding waste rocks to obtain waste rock powder by using a ground waste rock crushing system, wherein the diameter of the waste rock powder is not more than 5mm, preparing waste rock powder slurry by using mine water, injecting the waste rock powder slurry below a top boundary 16 of a water-flowing fractured zone through a grouting system, filling the goaf 17 and the water-flowing fractured zone, filling and reinforcing the dwarfism directly-falling water-bearing stratum 4 by using cement paste-accelerator composite slurry after the filling is finished, and reforming a main water-filled water-bearing stratum into a water-resisting stratum while filling a mining fracture and a protorock stratum fracture;
8) after directional drilling, gangue filling, and main water-filled aquifer reinforcement and reconstruction are sequentially performed on a single working face, the gangue filling is sequentially performed on each working face according to the mine continuing direction, and finally a complete and continuous waterproof strip 24 is formed near the field boundary 22.
Specifically, the construction process for filling and water-reducing mining of the gangue in the coal mine is an innovative mode of green mining of a deep-buried dwarfism coal field in northwest China. The invention can be widely applied to the deep dwarfism coal field exploitation in inner Mongolia, Shaanxi, Xinjiang, Gansu, Ningxia and other areas.
In conclusion, the waste filling and water reducing mining construction process provided by the invention realizes the cooperation of mine waste treatment and water reducing mining, meets the requirement of zero emission of the waste and a mine, greatly promotes the construction pace of green mines, has important social and economic benefits, and is suitable for the fields of coal mines, metallurgical mines, underground engineering and the like.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. A construction method for coal mine gangue filling and water-reducing mining is characterized by comprising the following steps: determining a main water-filling aquifer of the mine area based on the deposition water-controlling characteristics and the water-filling rule of the mine area; by utilizing a directional drilling technology, a directional drilling main hole (13) of a ground directional drilling machine (11) is constructed in a main water-filled water-containing layer in a mine area, and the horizontal and vertical directional drilling branch drilling holes (15) of the directional drilling main hole (13) section are determined by combining the slurry diffusion radius of the gangue powder slurry;
injecting gangue powder slurry into the directional drilling branch drill hole (15), and filling the gangue powder slurry into a goaf (17) and a water guide fracture zone range of a mine area by using a gangue conveying system; and after filling, filling and reinforcing the main water-filled aquifer by using the cement paste-accelerator composite slurry, and transforming the main water-filled aquifer into a water-resisting layer to realize the construction method for filling the gangue and reducing water mining in the coal mine.
2. The construction method for coal mine gangue filling and water reduction mining according to claim 1, which is characterized by comprising the following steps:
1) according to the spatial structures of all stratums of a mine area, determining a direct water-filled aquifer and a water-resisting layer within the range of a water-flowing fractured zone by combining the development height (10) of the caving zone after mining in the mine area and the position of a top boundary (16) of the water-flowing fractured zone; analyzing the water-rich performance of the direct water-filling aquifer, analyzing the water-resisting performance of the water-resisting layer to obtain the hydraulic connection and mining damage degree between the indirect water-filling aquifer and the direct water-filling aquifer, and determining the main water-filling aquifer in the mine area;
2) determining the mining damage range of the rock stratum of the mine area according to the mining bedrock shifting collapse angle (9) and the mining new boundary stratum collapse angle (14) of the mine area, and determining the position of a main directional drilling hole (13) of a ground directional drilling machine (11) by combining the mining damage range of the rock stratum of the mine area and the slurry diffusion radius of the gangue powder slurry; determining the track of the underground directional drilling branch drill hole (15) by combining the space structures of all stratums of the mine area and the vertical depth and turning radius of the main hole (13) of the directional drilling, and determining the vertical construction number of the directional drilling branch drill hole (15) by combining the thickness of the main water-filled aquifer; laying the horizontal spacing of the directional drilling branch drill holes (15) along the stoping direction (19) of the stoping face by combining the working stoping length and the continuing condition of the mine;
3) after the construction of the directional drilling main hole (13) and the directional drilling branch drilling hole (15) is finished, gangue powder slurry is injected into the area below a top boundary (16) of a water-guiding fractured zone by using a grouting system, a goaf (17) and the water-guiding fractured zone of a mine area are filled, the filling is finished after the filling is finished, then the main water-filled aquifer is filled and reinforced by using cement slurry-accelerator composite slurry, the main water-filled aquifer is reformed into a water-resisting layer, and the construction method for filling and reducing mining the gangue in the coal mine is realized.
3. The coal mine gangue filling and water reducing mining construction method as claimed in claim 2, wherein the mine area is suitable for deep Jurassic coal fields.
4. The construction method for coal mine gangue filling and water reduction mining according to claim 2, characterized in that after the gangue powder slurry is injected, the injection of the gangue powder slurry is stopped when the orifice pressure of the main directional drilling hole (13) reaches 1.0 times of the hydrostatic pressure of the main water-filled aquifer; when the grout-accelerator composite grout is injected, the injection of the grout-accelerator composite grout is stopped when the orifice pressure of the directional drilling main hole (13) reaches 1.5 times of the hydrostatic pressure of the main water-filled aquifer.
5. The method for coal mine gangue filling and water reduction mining construction according to claim 2, characterized in that the horizontal spacing of the directional drilling branch drill holes (15) is twice the slurry diffusion radius.
6. The coal mine waste filling and water reducing mining construction method according to claim 2, characterized in that waste rock is ground by a ground waste rock crushing system to obtain waste rock powder, and the obtained waste rock powder is made into waste rock powder slurry by mine water.
7. The construction method for coal mine gangue filling and water reduction mining according to claim 6, wherein the diameter of gangue powder is not more than 5mm, and the specific gravity of gangue powder slurry is 1.5-1.8.
8. The construction method for coal mine gangue filling and water reduction mining as claimed in claim 2, wherein directional drilling branch drill holes (15) are respectively constructed from the cutting hole to the direction of the withdrawing channel and the direction of the working face continuation in sequence, then gangue powder slurry filling and cement slurry-accelerator composite slurry filling and reinforcing are carried out, and a local water-resisting layer is formed into a water-resisting belt (24) continuous to the whole mine area boundary.
9. The construction method for coal mine gangue filling and water reduction mining as claimed in claim 2, characterized in that the end of the directional drilling branch drill hole (15) is plugged by a bridge device (21) downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011477252.5A CN112593853B (en) | 2020-12-15 | 2020-12-15 | Construction method for coal mine waste filling and water-reducing mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011477252.5A CN112593853B (en) | 2020-12-15 | 2020-12-15 | Construction method for coal mine waste filling and water-reducing mining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112593853A true CN112593853A (en) | 2021-04-02 |
| CN112593853B CN112593853B (en) | 2023-03-10 |
Family
ID=75195660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011477252.5A Active CN112593853B (en) | 2020-12-15 | 2020-12-15 | Construction method for coal mine waste filling and water-reducing mining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112593853B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006795A (en) * | 2021-04-09 | 2021-06-22 | 中国煤炭地质总局勘查研究总院 | Treatment method of sandstone water on top plate of Jurassic coal field |
| CN113107487A (en) * | 2021-04-20 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Coal seam roof casing horizontal long drilling hole simultaneous mining and simultaneous charging ecological coal mining method and system |
| CN114017106A (en) * | 2021-11-03 | 2022-02-08 | 中煤能源研究院有限责任公司 | Calculation method for underground ortho-position grouting filling capacity of gangue |
| CN115171369A (en) * | 2022-06-09 | 2022-10-11 | 浙大城市学院 | Parking management command system based on intelligent traffic |
| CN115419384A (en) * | 2022-07-04 | 2022-12-02 | 中国矿业大学(北京) | Aquifer dynamic grouting, interception and water plugging method for mining overburden rock complete breakage |
| CN115467639A (en) * | 2022-08-15 | 2022-12-13 | 中煤科工集团西安研究院有限公司 | Water interception and emission reduction method for directionally exploring and blocking ground |
| CN116446880A (en) * | 2023-04-04 | 2023-07-18 | 中煤科工开采研究院有限公司 | Green mining method and device, electronic equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498696A (en) * | 2013-10-02 | 2014-01-08 | 中国矿业大学 | Method for grouting, filling and compacting goaf filling body from roof roadway |
| CN105174886A (en) * | 2015-08-25 | 2015-12-23 | 山东大学 | Limestone water-containing layer grouting reconstruction material suitable for superlong-distance pumping |
| CN109209380A (en) * | 2018-09-30 | 2019-01-15 | 中国矿业大学 | A kind of mine, which picks up, fills control recovery method |
| CN111794799A (en) * | 2020-07-16 | 2020-10-20 | 中煤天津设计工程有限责任公司 | Solid waste treatment technology for ground drilling, grouting and filling of old goaf |
-
2020
- 2020-12-15 CN CN202011477252.5A patent/CN112593853B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498696A (en) * | 2013-10-02 | 2014-01-08 | 中国矿业大学 | Method for grouting, filling and compacting goaf filling body from roof roadway |
| CN105174886A (en) * | 2015-08-25 | 2015-12-23 | 山东大学 | Limestone water-containing layer grouting reconstruction material suitable for superlong-distance pumping |
| CN109209380A (en) * | 2018-09-30 | 2019-01-15 | 中国矿业大学 | A kind of mine, which picks up, fills control recovery method |
| CN111794799A (en) * | 2020-07-16 | 2020-10-20 | 中煤天津设计工程有限责任公司 | Solid waste treatment technology for ground drilling, grouting and filling of old goaf |
Non-Patent Citations (1)
| Title |
|---|
| 刘成勇等: "葫芦素煤矿缓冲硐室壁后注浆堵水技术", 《煤矿现代化》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006795A (en) * | 2021-04-09 | 2021-06-22 | 中国煤炭地质总局勘查研究总院 | Treatment method of sandstone water on top plate of Jurassic coal field |
| CN113006795B (en) * | 2021-04-09 | 2023-10-20 | 中国煤炭地质总局勘查研究总院 | Treatment method of dwarf coal field roof sandstone water |
| CN113107487A (en) * | 2021-04-20 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Coal seam roof casing horizontal long drilling hole simultaneous mining and simultaneous charging ecological coal mining method and system |
| CN113107487B (en) * | 2021-04-20 | 2024-02-13 | 中煤科工集团西安研究院有限公司 | Horizontal long drilling and along-mining along-filling ecological coal mining method and system for coal seam roof sleeve |
| CN114017106A (en) * | 2021-11-03 | 2022-02-08 | 中煤能源研究院有限责任公司 | Calculation method for underground ortho-position grouting filling capacity of gangue |
| CN114017106B (en) * | 2021-11-03 | 2023-10-27 | 中煤能源研究院有限责任公司 | Method for calculating filling capacity of underground ortho grouting of gangue |
| CN115171369A (en) * | 2022-06-09 | 2022-10-11 | 浙大城市学院 | Parking management command system based on intelligent traffic |
| CN115171369B (en) * | 2022-06-09 | 2023-10-20 | 浙大城市学院 | Parking management command system based on intelligent traffic |
| CN115419384A (en) * | 2022-07-04 | 2022-12-02 | 中国矿业大学(北京) | Aquifer dynamic grouting, interception and water plugging method for mining overburden rock complete breakage |
| CN115467639A (en) * | 2022-08-15 | 2022-12-13 | 中煤科工集团西安研究院有限公司 | Water interception and emission reduction method for directionally exploring and blocking ground |
| CN116446880A (en) * | 2023-04-04 | 2023-07-18 | 中煤科工开采研究院有限公司 | Green mining method and device, electronic equipment and storage medium |
| CN116446880B (en) * | 2023-04-04 | 2023-12-01 | 中煤科工开采研究院有限公司 | Green mining method and device, electronic equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112593853B (en) | 2023-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112593853B (en) | Construction method for coal mine waste filling and water-reducing mining | |
| CN110761814B (en) | Roof water control method based on presplitting and grouting modification | |
| CN110242301B (en) | Two-step grouting modification water-retention coal mining method for roof aquifer | |
| CN108894727B (en) | Water retention method for plugging main channel of overburden rock water flowing fracture by grouting in ground horizontal directional drilling | |
| CN103291325B (en) | The preventing control method of Coal-mining Above Confined-water floor strata gushing water | |
| CN106948843B (en) | A kind of bilayer multiple-limb concordant bored grouting transformation dual limestone aquifer method of roof and floor | |
| CN102877884B (en) | The difficult to understand grey top transformation of a kind of mine based on km directional drilling technology and construction method | |
| CN103498696B (en) | A kind of method from roadway in the roof grouting filling compacting goaf filling body | |
| CN102705005B (en) | Technology for plugging water bursting in mine by directional diversion grouting | |
| CN112324337B (en) | Whole-course gas extraction method for penetrating layer of soft coal seam bottom plate and along top comb-shaped drilling | |
| CN106703692A (en) | Method using surface orientation bedding drilling grouting to reinforce laminar limestone | |
| CN102587859A (en) | Technology for blocking mine water bursting through backflow grouting | |
| CN103835729A (en) | Ground pre-grouting strengthening technology for deep long-distance roadway surrounding rock | |
| RU2537711C1 (en) | Erection of tunnels in structurally unstable soils with karst phenomena and/or boil processes | |
| CN111075478A (en) | Pre-grouting reinforcement process for ground construction of broken belt of excavation working face structure | |
| CN106869966A (en) | A kind of method for blocking of absciss layer water supply source | |
| CN103835723A (en) | Comprehensive pretreatment method for shaft penetration in mined-out area stratum | |
| CN103362117A (en) | Full-section grouting method for grouting section | |
| CN104370508A (en) | Coal mine floor rock mass grouting reinforcement method and grouting slurry | |
| CN107152309A (en) | A kind of coal seam is the high water level and high-speed drainage water damage prevention and controls of Main aquifer | |
| CN107313743B (en) | Method for repairing weak zone of coal seam floor water-resisting layer by utilizing coal seam gas well | |
| CN115419384B (en) | Dynamic grouting interception water shutoff method for aquifer with fully broken mining overburden | |
| CN111411909A (en) | Artificial wall building method for treating drilling engineering in coal mining subsidence area | |
| CN115467639A (en) | Water interception and emission reduction method for directionally exploring and blocking ground | |
| CN114278372B (en) | Diversion arrangement method for underground directional drilling area of huge thick water-rich layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |