CN112682101A - Method for draining aquifers of coal seam roof in advance - Google Patents
Method for draining aquifers of coal seam roof in advance Download PDFInfo
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- CN112682101A CN112682101A CN202110109290.3A CN202110109290A CN112682101A CN 112682101 A CN112682101 A CN 112682101A CN 202110109290 A CN202110109290 A CN 202110109290A CN 112682101 A CN112682101 A CN 112682101A
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- 239000003245 coal Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 238000005553 drilling Methods 0.000 claims abstract description 34
- 230000005484 gravity Effects 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000005065 mining Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 208000035126 Facies Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
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Abstract
The invention relates to a method for pre-draining a coal seam roof aquifer, which comprises the steps of firstly, vertically drilling a hole in the ground above a Rough sandstone aquifer by using a drilling machine to obtain a straight hole, carrying out reaming treatment on the straight hole, then, obliquely drilling the ground by using a directional drilling machine to obtain an inclined hole, wherein the bottom of the inclined hole is positioned below the Rough sandstone aquifer, the bottom of the inclined hole is communicated with one side of the straight hole, water in the Rough sandstone aquifer automatically flows into the straight hole and the inclined hole, a water pipe connected with a water pump is inserted below the water surface in the straight hole, and the water in the straight hole is extracted by using the water pump. The invention can effectively reduce the construction engineering of the underground roadway, is beneficial to the safe exploitation of coal resources and simultaneously improves the efficiency of resource exploitation.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a method for draining a coal seam roof water-bearing stratum in advance.
Background
When mining coal resources in a mining area, the influence of a straightly-assembled crude sandstone aquifer at the upper part of a coal measure stratum, namely a coal seam roof aquifer, may be influenced to a certain extent, the safety mining of a coal mine is influenced, the aquifer belongs to a river sedimentary facies under a drought condition, and after scientific analysis is carried out according to drilling statistical data, the coal seam roof aquifer is considered to be drained in advance, so that the peak water inflow caused by periodic falling after mining can be reduced, peak clipping and valley leveling are realized, the safety of the coal resources is ensured, and efficient recovery is realized, however, when the aquifer is drained before water extraction of the roof aquifer, the initial water pressure and the initial water inflow of individual drilling are large due to the large water amount of the aquifer, and due to the limitation of an underground drainage system, the roof aquifer needs to be drained in stages, and a drainage roadway and a drainage channel special for construction are required, so that a large amount of cost and capital investment, and moreover, certain influence is caused to the safe mining of the coal mine and the mining continuation progress of the working face, and aiming at the problems, the invention provides the method for draining the water-bearing stratum of the coal seam roof in advance, which can effectively reduce the construction engineering of an underground tunnel, is beneficial to the safe mining of coal resources and simultaneously improves the resource mining efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the method for draining the aquifer of the coal seam roof in advance, which can effectively reduce the construction engineering of an underground roadway, is beneficial to the safe mining of coal resources and simultaneously improves the resource mining efficiency.
The technical scheme adopted by the invention is as follows: a method for draining aquifers of a coal seam roof in advance comprises the following steps:
step a: vertically drilling a hole in the ground above the aquifer of the Roots by using a drilling machine to obtain a straight hole, and performing reaming treatment on the straight hole, wherein the bottom of the reamed straight hole is positioned below the aquifer of the Roots;
step b: utilizing a directional drilling machine to drill holes on the ground in an inclined mode to obtain inclined holes, wherein the bottoms of the inclined holes are located below the aquifers of the Rough sandstone of the Rough set, and the bottoms of the inclined holes are communicated with one side of the straight holes;
step c: water in the water-containing layer of the straight sandstone group automatically flows into the straight holes and the inclined holes;
step d: inserting a water pipe connected with a water pump below the water surface in the straight hole, and extracting water in the straight hole by using the water pump;
step e: due to the height difference and gravity of water in the straight hole and the inclined hole, along with the extraction of the water in the straight hole, the water in the inclined hole flows into the straight hole and is extracted by the water pump.
Preferably, the height of the straight hole below the aquifer of the orthorhombic crude sandstone is 100-150 m.
Preferably, the diameter range of the straight hole after reaming is 140-450mm, and the included angle between the straight hole and the vertical line vertical to the ground is less than 3 degrees.
Preferably, the aperture range of the inclined hole is 65-140mm, and the included angle range between the inclined hole and the ground is 45-75 degrees.
The invention has the beneficial effects that: the invention uses the drilling machine to drill the straight hole and the inclined hole to the lower part of the coal seam roof aquifer, and the straight hole and the inclined hole are communicated under the roof aquifer, so that the water in the roof aquifer enters the straight hole and the inclined hole under the condition of initial air pressure difference, then the water in the straight hole can be pumped by using the water pump, the condition of large water inflow caused by overlarge water pressure is avoided due to the diversion and partial pressure of the water, the construction engineering of an underground tunnel is effectively reduced, the condition of safety threat of the roof water in the mining stage is avoided, and the mining of coal resources is safer and more efficient.
Drawings
Fig. 1 is a schematic view of the working state of the present invention.
In the figure: 1. the sandstone aquifer comprises a water-bearing layer 2 of a sandstone in a Roots group, the ground 3, a straight hole 4, an inclined hole 5, a water pump room 6 and a coal layer.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention, and are specifically described below with reference to the embodiments.
Example 1
A method for draining aquifers of a coal seam roof in advance comprises the following steps:
step a: the method comprises the steps of vertically drilling a hole in the ground 2 above a rectilinear coarse sandstone aquifer 1 by using a drilling machine to obtain a straight hole 3, reaming the straight hole 3, wherein the bottom of the reamed straight hole 3 is positioned below the rectilinear coarse sandstone aquifer 1, so that the straight hole can completely penetrate through the rectilinear coarse sandstone aquifer 1 to enable water to flow into the straight hole 3, and the straight hole can play a buffering role, namely part of water flows downwards to prevent the situation that the initial water pressure is too high to cause water gushing and outflow;
step b: the method comprises the following steps that a directional drilling machine is used for conducting inclined drilling on the ground to obtain an inclined hole 4, the bottom of the inclined hole 4 is located below a water-bearing layer 1 of the coarse sandstone of the Protoil group, the bottom of the inclined hole 4 is communicated with one side of a straight hole 3, the drilling difficulty is higher when the included angle is larger, therefore, the included angle is not easy to be too large, the inclined hole 4 plays a role in distributing and dividing water, the larger the aperture is or the larger the included angle with the ground 2 is, the length of the inclined hole 4 is longer, the water storage capacity is more, the distributed water is more, and the buffering effect of preventing water from flowing out of;
step c: the water in the water-bearing stratum 1 of the coarse sandstone of the direct set automatically flows into the straight holes 3 and the inclined holes 4;
step d: inserting a water pipe connected with a water pump below the water surface in the straight hole 3, adjusting the position of the water pipe in real time according to the height of the water surface, and extracting water in the straight hole 3 by using the water pump;
step e: due to the height difference and gravity of the water in the straight holes 3 and the inclined holes 4, along with the extraction of the water in the straight holes 3, the water in the inclined holes 4 flows into the straight holes 3 and is extracted by a water pump.
The concrete working state of the method is as shown in figure 1, a drilling machine is used for vertically downwards drilling from the ground 2 above a straight-screw crude sandstone aquifer 1 and carrying out reaming treatment to obtain a reamed straight hole 3, the depth of the straight hole 3 reaches the position below the straight-screw crude sandstone aquifer 1, a directional drilling machine is used for obliquely drilling the ground to obtain an inclined hole 4, the bottom of the inclined hole 4 is positioned below the straight-screw crude sandstone aquifer 1, and the bottom of the inclined hole is communicated with one side of the straight hole 3, namely
The drilling of straight hole 3 and inclined hole 4 can be gone on simultaneously, two drilling are accomplished and are dredged the back, straight rochow group's coarse sandstone aquifer 1 is from flowing into in straight hole 3 and the inclined hole 4, subaerial water pump room 5 that is provided with, the water pipe that will connect the water pump inserts in the straight hole, after the start-up system power, thereby the water pump work is taken out the water in the straight hole 3, along with the decline of the interior water level of straight hole 3, the water in the inclined hole 4 can flow into in the straight hole 3 because of the effect of difference in height, pressure and gravity, then the water pump takes out one of them together, 6 roof aquifer's of coal seam in advance are dredged promptly.
Example 2
A method for draining aquifers of a coal seam roof in advance comprises the following steps:
step a: a drilling machine is used for vertically drilling a hole on the ground 2 above the aquifer 1 of the sandstone in the Roots group to obtain a straight hole 3, and the straight hole 3 is reamed, the bottom of the reamed straight hole 3 is positioned below the aquifer 1 of the Rough sandstone, the height of the straight hole 3 below the water-bearing layer 1 of the orthorhombic crude sandstone is 100-, namely, part of water flows downwards to prevent the water from gushing out due to overlarge initial water pressure, the aperture range of the straight hole 3 after reaming is 140-450mm, the included angle between the water pump and a vertical line vertical to the ground 2 is less than 3 degrees, so that a water pumping pipe connected with the water pump can smoothly enter the straight hole 3 for pumping water;
step b: the method comprises the steps that a directional drilling machine is used for conducting inclined drilling on the ground to obtain an inclined hole 4, the bottom of the inclined hole 4 is located below a water-bearing layer 1 of the crude sandstone of the Roots, the bottom of the inclined hole 4 is communicated with one side of a straight hole 3, the aperture range of the inclined hole 4 is 65-140mm, the included angle range of the inclined hole 4 and the ground 2 is 45-75 degrees, the larger the included angle is, the larger the drilling difficulty is, the larger the included angle is, the smaller the included angle is, the water diversion and partial pressure effects are achieved, the larger the aperture is or the included angle between the inclined hole 4 and the ground 2 is, the longer the inclined hole 4 is, the more water is stored, more;
step c: the water in the water-bearing stratum 1 of the coarse sandstone of the direct set automatically flows into the straight holes 3 and the inclined holes 4;
step d: inserting a water pipe connected with a water pump below the water surface in the straight hole 3, adjusting the position of the water pipe in real time according to the height of the water surface, and extracting water in the straight hole 3 by using the water pump;
step e: due to the height difference and gravity of the water in the straight holes 3 and the inclined holes 4, along with the extraction of the water in the straight holes 3, the water in the inclined holes 4 flows into the straight holes 3 and is extracted by a water pump.
The specific working state of the method is shown in figure 1, a drilling machine is used for vertically downwards drilling from the ground 2 above the aquifer 1 of the crude sandstone of the straighboard group and carrying out reaming treatment to obtain reamed straight holes 3, the hole diameter range is between 140 and 450mm, the depth of the straight holes 3 is 100 and 150m below the aquifer 1 of the crude sandstone of the strawboard group, namely the depth of the straight holes 3 is 150m
Between 100 plus 150m, the ground is drilled obliquely by a directional drilling machine to obtain an inclined hole 4, the bottom of the inclined hole 4 is positioned below the aquifer 1 of the Rough sandstone in the Ronchi group, and the bottom of the inclined hole is communicated with one side of the straight hole 3, namely
The drilling of straight hole 3 and inclined hole 4 can be gone on simultaneously, two drilling are accomplished and are dredged the back, straight rochow group's coarse sandstone aquifer 1 is from flowing into in straight hole 3 and the inclined hole 4, subaerial water pump room 5 that is provided with, the water pipe that will connect the water pump inserts in the straight hole, after the start-up system power, thereby the water pump work is taken out the water in the straight hole 3, along with the decline of the interior water level of straight hole 3, the water in the inclined hole 4 can flow into in the straight hole 3 because of the effect of difference in height, pressure and gravity, then the water pump takes out one of them together, 6 roof aquifer's of coal seam in advance are dredged promptly.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (4)
1. A method for draining a coal seam roof water-bearing stratum in advance is characterized by comprising the following steps:
step a: vertically drilling a hole in the ground above the aquifer of the Roots by using a drilling machine to obtain a straight hole, and performing reaming treatment on the straight hole, wherein the bottom of the reamed straight hole is positioned below the aquifer of the Roots;
step b: utilizing a directional drilling machine to drill holes on the ground in an inclined mode to obtain inclined holes, wherein the bottoms of the inclined holes are located below the aquifers of the Rough sandstone of the Rough set, and the bottoms of the inclined holes are communicated with one side of the straight holes;
step c: water in the water-containing layer of the straight sandstone group automatically flows into the straight holes and the inclined holes;
step d: inserting a water pipe connected with a water pump below the water surface in the straight hole, and extracting water in the straight hole by using the water pump;
step e: due to the height difference and gravity of water in the straight hole and the inclined hole, along with the extraction of the water in the straight hole, the water in the inclined hole flows into the straight hole and is extracted by the water pump.
2. The method for early drainage of a coal seam roof aquifer according to claim 1, wherein: in the step a, the height of the straight hole below the aquifer of the orthorhombic crude sandstone is 100-150 m.
3. The method for early drainage of a coal seam roof aquifer according to claim 1, wherein: in the step a, the aperture range of the straight hole after reaming is 140-450mm, and the included angle between the straight hole and the vertical line vertical to the ground is less than 3 degrees.
4. The method for early drainage of a coal seam roof aquifer according to claim 1, wherein: the aperture range of the inclined hole is 65-140mm, and the included angle range between the inclined hole and the ground is 45-75 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110109290.3A CN112682101A (en) | 2021-01-27 | 2021-01-27 | Method for draining aquifers of coal seam roof in advance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110109290.3A CN112682101A (en) | 2021-01-27 | 2021-01-27 | Method for draining aquifers of coal seam roof in advance |
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Citations (5)
| 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 |
| CN101382063A (en) * | 2008-09-04 | 2009-03-11 | 新奥气化采煤有限公司 | Novel underground coal gasification furnace |
| CN105114029A (en) * | 2015-08-19 | 2015-12-02 | 中煤科工集团西安研究院有限公司 | Water plugging method for poor sealing borehole in mine laneway |
| CN106285776A (en) * | 2016-08-30 | 2017-01-04 | 陕西煤业化工技术研究院有限责任公司 | A kind of unrestrained method of roof water based on Technology of Directional Drilling |
| CN109026140A (en) * | 2018-08-02 | 2018-12-18 | 缪协兴 | A method of with band and the artificial water proof stratum of solid-filling coal-mining technique |
-
2021
- 2021-01-27 CN CN202110109290.3A patent/CN112682101A/en active Pending
Patent Citations (5)
| 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 |
| CN101382063A (en) * | 2008-09-04 | 2009-03-11 | 新奥气化采煤有限公司 | Novel underground coal gasification furnace |
| CN105114029A (en) * | 2015-08-19 | 2015-12-02 | 中煤科工集团西安研究院有限公司 | Water plugging method for poor sealing borehole in mine laneway |
| CN106285776A (en) * | 2016-08-30 | 2017-01-04 | 陕西煤业化工技术研究院有限责任公司 | A kind of unrestrained method of roof water based on Technology of Directional Drilling |
| CN109026140A (en) * | 2018-08-02 | 2018-12-18 | 缪协兴 | A method of with band and the artificial water proof stratum of solid-filling coal-mining technique |
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