CN112761677A - Underground coal mine water prevention and control method for grouting water-resisting layer by adopting mechanical digging groove construction - Google Patents
Underground coal mine water prevention and control method for grouting water-resisting layer by adopting mechanical digging groove construction Download PDFInfo
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- CN112761677A CN112761677A CN202011430253.4A CN202011430253A CN112761677A CN 112761677 A CN112761677 A CN 112761677A CN 202011430253 A CN202011430253 A CN 202011430253A CN 112761677 A CN112761677 A CN 112761677A
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- water
- grouting
- rope
- resisting layer
- coal mine
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
Abstract
The invention discloses a method for preventing and controlling water in an underground coal mine by adopting a mechanical digging groove construction grouting water-resisting layer, and belongs to the technical field of mine engineering construction. The invention drills a U-shaped communicating drill hole for multiple times through the directional drilling machine and cuts a rock stratum by adopting a rope saw cutting machine, and simultaneously carries out replacement grouting to form a mechanical digging groove grouting water-stop layer which can completely meet the design requirement, can effectively span the whole range of a water-stop layer, and cuts off a seepage channel between the water-stop layer and a coal seam to be exploited.
Description
Technical Field
The invention relates to the technical field of mine engineering construction, in particular to a method for preventing and controlling water in an underground coal mine by adopting a mechanical digging groove to construct and grout a water-resisting layer.
Background
At present, with gradual depletion of shallow resources, mining of various mineral resources to deep parts is imperative. In deep mining, the face is the complicated environment that ground pressure is big, and the pressure-bearing water pressure is high. Under the disturbance of coal seam mining, the deep original rock environment is damaged, and various coal mining water inrush accidents frequently occur.
At present, a drilling advanced grouting method is mainly adopted for underground coal mine water control, and the concrete method is that before coal seam mining, advanced drilling is carried out on a coal seam top plate (or a bottom plate), slurry is injected into holes, so that the slurry permeates in the middle of rock body pores, seepage channels are blocked, and a tree-shaped fan-shaped grouting water-proof curtain is formed. Due to the characteristics of pore development of the underground rock stratum, engineering practice proves that even if chemical grout with high permeability is adopted for grouting, an effective waterproof curtain which meets design requirements and can tightly seal and block all pore seepage channels is difficult to form, and an ideal water prevention and control effect cannot be achieved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the underground coal mine water prevention and control method for grouting the water-resisting layer by adopting mechanical groove digging construction, which can effectively cut off a seepage passage between the water-bearing layer and a coal seam to be exploited, greatly improve the reliability of water prevention and control of the underground roof (or the bottom plate) of the coal mine, prevent the water inrush accident of the roof (or the bottom plate) and effectively ensure the production safety of the coal mine under the threat of water damage of the roof (or the bottom plate).
The invention is realized by the following technical scheme: a method for preventing and controlling water in an underground coal mine by adopting a mechanical digging groove construction grouting water-resisting layer is characterized by comprising the following steps:
step 1: constructing an auxiliary roadway before the coal seam to be mined is mined, so that the auxiliary roadway is close to a water-bearing stratum and a safe water-resisting distance is kept;
step 2: constructing a drilling site in the auxiliary roadway at a horizontal position which is 10 meters away from the horizontal line of the coal seam roof and/or the bottom plate aquifer, and arranging a directional drilling machine in the drilling site;
and step 3: two approximately horizontal drill holes are constructed in a coal seam roof (or floor) rock stratum along the horizontal direction of a drill site by adopting a directional drilling machine, the depression angle of the drill holes is within a range of 5 degrees, and the depth of the drill holes is based on the range exceeding a water-bearing stratum;
and 4, step 4: by utilizing the directional drilling function of a directional drilling machine, horizontally turning and drilling from the bottom of a certain drill hole to the bottom of another drill hole in the same horizontal plane, so that the two drill holes are communicated with each other to form a U-shaped communicated drill hole;
and 5: penetrating a diamond rope along the U-shaped communication drill hole, and leading out the diamond rope from two ends of the U-shaped communication through hole; a rope saw cutting machine is adopted in a drilling field to drive a diamond rope to rotate to cut a top plate rock stratum and/or a bottom plate rock stratum, a nearly horizontal blind groove with a certain thickness is formed by cutting through a rope saw, and a mud protective wall is adopted in the blind groove;
step 6: arranging a grouting pipe along the bottom of the blind groove, injecting cement slurry, and replacing the retaining wall slurry until the top plate and/or the bottom plate blind groove is completely filled with the cement slurry; after the cement grout is solidified, forming a grouting water-resisting layer of a cement filling entity with certain strength and certain thickness on the top plate and/or the bottom plate of the coal seam to be mined;
and 7: and if the range of the aquifer is large, repeating the steps 3-6, drilling the U-shaped communicated drill holes and cutting the rock stratum by a rope saw cutting machine for multiple times by adopting a directional drilling machine at every 20 m section on the horizontal plane, and simultaneously performing replacement grouting to enable the grouting water-resisting layer to span the whole range of the aquifer.
Further, in the step 5, after the diamond rope is led out from the two ends of the U-shaped connecting through hole, the diamond rope is wound on a driving wheel and an auxiliary wheel of the rope saw cutting machine, a rope saw electric motor is started, the driving wheel is adjusted through a control panel, the tensile tension of the rope is improved, the diamond rope is ensured to be properly tightened, and circulating cooling water is supplied; and starting the other electric motor to drive the driving wheel to drive the diamond rope to rotate and cut the deep rock stratum.
Further, in the step 5, the wall protecting medium formed by cutting with the rope saw is replaced by the water medium.
Further, in the step 6, the injected cement slurry is replaced by concrete slurry mixed with water glass quick setting medium.
The invention has the beneficial effects that: the invention drills a U-shaped communicating drill hole for multiple times through the directional drilling machine and cuts a rock stratum by adopting a rope saw cutting machine, and simultaneously carries out replacement grouting to form a mechanical digging groove grouting water-stop layer which can completely meet the design requirement, can effectively span the whole range of a water-stop layer, and cuts off a seepage channel between the water-stop layer and a coal seam to be exploited.
Drawings
The invention is further illustrated below with reference to the figures and examples.
FIG. 1 is a schematic view of a construction structure of the present invention;
figure 2 is a cross-sectional view of the inventive drill site.
In the figure, 1, an auxiliary roadway, 2, a drill site, 3, a coal seam to be mined, 4, a water-bearing stratum, 5, a drill hole, 6, a blind slot, 5 and 6 are grouted and a grouting water-resisting stratum is formed.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification, 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail but are intended to be part of the specification as appropriate.
The method for preventing and controlling water in the underground coal mine by adopting the mechanical digging groove construction grouting water-resisting layer is characterized by comprising the following steps of:
step 1: constructing an auxiliary roadway before the coal seam to be mined is mined, so that the auxiliary roadway is close to a water-bearing stratum and a safe water-resisting distance is kept; the distance determination refers to coal mine water control rules.
Step 2: constructing a drilling site in the auxiliary roadway at a horizontal position which is 10 meters away from the horizontal line of the coal seam roof and/or the bottom plate aquifer, and arranging a directional drilling machine in the drilling site;
and step 3: two approximately horizontal drill holes are constructed in a coal seam roof (or floor) rock stratum along the horizontal direction of a drill site by adopting a directional drilling machine, the depression angle of the drill holes is within a range of 5 degrees, and the depth of the drill holes is based on the range exceeding a water-bearing stratum;
and 4, step 4: by utilizing the directional drilling function of a directional drilling machine, horizontally turning and drilling from the bottom of a certain drill hole to the bottom of another drill hole in the same horizontal plane, so that the two drill holes are communicated with each other to form a U-shaped communicated drill hole;
and 5: penetrating a diamond rope along the U-shaped communication drill hole, and leading out the diamond rope from two ends of the U-shaped communication through hole; a rope saw cutting machine is adopted in a drilling field to drive a diamond rope to rotate to cut a top plate rock stratum and/or a bottom plate rock stratum, a nearly horizontal blind groove with a certain thickness is formed by cutting through a rope saw, and a mud protective wall is adopted in the blind groove;
step 6: arranging a grouting pipe along the bottom of the blind groove, injecting cement slurry, and replacing the retaining wall slurry until the top plate and/or the bottom plate blind groove is completely filled with the cement slurry; after the cement grout is solidified, forming a grouting water-resisting layer of a cement filling entity with certain strength and certain thickness on the top plate and/or the bottom plate of the coal seam to be mined;
and 7: and if the range of the aquifer is large, repeating the steps 3-6, drilling the U-shaped communicated drill holes and cutting the rock stratum by a rope saw cutting machine for multiple times by adopting a directional drilling machine at every 20 m section on the horizontal plane, and simultaneously performing replacement grouting to enable the grouting water-resisting layer to span the whole range of the aquifer.
Further, in the step 5, after the diamond rope is led out from the two ends of the U-shaped connecting through hole, the diamond rope is wound on a driving wheel and an auxiliary wheel of the rope saw cutting machine, a rope saw electric motor is started, the driving wheel is adjusted through a control panel, the tensile tension of the rope is improved, the diamond rope is ensured to be properly tightened, and circulating cooling water is supplied; and starting the other electric motor to drive the driving wheel to drive the diamond rope to rotate and cut the deep rock stratum.
Further, in the step 5, the wall protecting medium formed by cutting with the rope saw is replaced by the water medium.
Further, in the step 6, the injected cement slurry is replaced by concrete slurry mixed with water glass quick setting medium.
The invention drills a U-shaped communicating drill hole for multiple times through the directional drilling machine and cuts a rock stratum by adopting a rope saw cutting machine, and simultaneously carries out replacement grouting to form a mechanical digging groove grouting water-stop layer which can completely meet the design requirement, can effectively span the whole range of a water-stop layer, and cuts off a seepage channel between the water-stop layer and a coal seam to be exploited.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A method for preventing and controlling water in an underground coal mine by adopting a mechanical digging groove construction grouting water-resisting layer is characterized by comprising the following steps:
step 1: constructing an auxiliary roadway before the coal seam to be mined is mined, so that the auxiliary roadway is close to a water-bearing stratum and a safe water-resisting distance is kept;
step 2: constructing a drilling site in the auxiliary roadway at a horizontal position which is 10 meters away from the horizontal line of the coal seam roof and/or the bottom plate aquifer, and arranging a directional drilling machine in the drilling site;
and step 3: adopting a directional drilling machine, and constructing two approximately horizontal drill holes in a top plate (or a bottom plate) rock stratum of a coal seam along the horizontal direction of a drilling field, wherein the depression angle of the drill holes is within a range of 5 degrees, and the depth of the drill holes is based on the range exceeding a water-bearing stratum;
and 4, step 4: by utilizing the directional drilling function of a directional drilling machine, horizontally turning and drilling from the bottom of a certain drill hole to the bottom of another drill hole in the same horizontal plane, so that the two drill holes are communicated with each other to form a U-shaped communicated drill hole;
and 5: penetrating a diamond rope along the U-shaped communication drill hole, and leading out the diamond rope from two ends of the U-shaped communication through hole; a rope saw cutting machine is adopted in a drilling field to drive a diamond rope to rotate to cut a top plate rock stratum and/or a bottom plate rock stratum, a nearly horizontal blind groove with a certain thickness is formed by cutting through a rope saw, and a mud protective wall is adopted in the blind groove;
step 6: arranging a grouting pipe along the bottom of the blind groove, injecting cement slurry, and replacing the retaining wall slurry until the top plate and/or the bottom plate blind groove is completely filled with the cement slurry; after the cement grout is solidified, forming a grouting water-resisting layer of a cement filling entity with certain strength and certain thickness on the top plate and/or the bottom plate of the coal seam to be mined;
and 7: and if the range of the aquifer is large, repeating the steps 3-6, drilling the U-shaped communicated drill holes and cutting the rock stratum by a rope saw cutting machine for multiple times by adopting a directional drilling machine at every 20 m section on the horizontal plane, and simultaneously performing replacement grouting to enable the grouting water-resisting layer to span the whole range of the aquifer.
2. The method for preventing and treating water in a coal mine underground by grouting a water-resisting layer through mechanical groove digging construction according to claim 1, wherein in the step 5, after the diamond rope is led out from two ends of the U-shaped connecting through hole, the diamond rope is wound on a driving wheel and an auxiliary wheel of a rope saw cutting machine, a rope saw electric motor is started, the driving wheel is adjusted through a control panel, the tensile tension of the rope is improved, the diamond rope is ensured to be properly tightened, and circulating cooling water is supplied; and starting the other electric motor to drive the driving wheel to drive the diamond rope to rotate and cut the deep rock stratum.
3. The method for preventing and treating water in a coal mine underground by grouting a water-resisting layer through mechanical groove digging construction according to claim 1, wherein in the step 5, the wall protecting medium formed by cutting through a rope saw is replaced by the water medium.
4. The method for preventing and treating water in an underground coal mine by grouting a water-resisting layer through mechanical groove digging construction according to claim 1, wherein in the step 6, the injected cement grout is replaced by concrete grout mixed with a water glass quick setting medium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011430253.4A CN112761677A (en) | 2020-12-09 | 2020-12-09 | Underground coal mine water prevention and control method for grouting water-resisting layer by adopting mechanical digging groove construction |
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| CN202011430253.4A CN112761677A (en) | 2020-12-09 | 2020-12-09 | Underground coal mine water prevention and control method for grouting water-resisting layer by adopting mechanical digging groove construction |
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| CN112761677A true CN112761677A (en) | 2021-05-07 |
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| CN108894727A (en) * | 2018-07-05 | 2018-11-27 | 中国矿业大学 | The water-retaining method of ground level directional drilling slip casting closure overlying strata water producing fractures main channel |
| CN109029832A (en) * | 2018-06-29 | 2018-12-18 | 中国矿业大学 | A method of aquifer water pressure is adopted based on the monitoring of incorporated light fiber sensor |
| CN111927480A (en) * | 2020-08-11 | 2020-11-13 | 中国矿业大学 | Construction method of underground continuous blind slot grouting curtain for water-based rock rich in pores |
-
2020
- 2020-12-09 CN CN202011430253.4A patent/CN112761677A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050709A (en) * | 2006-04-03 | 2007-10-10 | 郭国政 | High water pressure releasing and blocking mining method for mining area |
| CN101608552A (en) * | 2008-06-18 | 2009-12-23 | 郭国政 | The seat earth aquifer reinforces and protects the method for water barrier in reinforcing process |
| CN102134967A (en) * | 2011-01-25 | 2011-07-27 | 煤炭科学研究总院西安研究院 | Construction method of consolidating horizontal directional drilling hole by grouting coal seam baseboard |
| CN103032083A (en) * | 2012-12-21 | 2013-04-10 | 中南大学 | Reconstruction method for water-proof shell |
| CN107044289A (en) * | 2017-06-22 | 2017-08-15 | 中国矿业大学 | A kind of water damage prevention and controls of bored grouting closure overlying strata water producing fractures main channel |
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| CN109029832A (en) * | 2018-06-29 | 2018-12-18 | 中国矿业大学 | A method of aquifer water pressure is adopted based on the monitoring of incorporated light fiber sensor |
| CN108894727A (en) * | 2018-07-05 | 2018-11-27 | 中国矿业大学 | The water-retaining method of ground level directional drilling slip casting closure overlying strata water producing fractures main channel |
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| CN111927480A (en) * | 2020-08-11 | 2020-11-13 | 中国矿业大学 | Construction method of underground continuous blind slot grouting curtain for water-based rock rich in pores |
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Application publication date: 20210507 |