CN114370251B - Coal seam group downstream mining overlying strata separation layer directional grading zonal grouting method - Google Patents
Coal seam group downstream mining overlying strata separation layer directional grading zonal grouting method Download PDFInfo
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- CN114370251B CN114370251B CN202210043379.9A CN202210043379A CN114370251B CN 114370251 B CN114370251 B CN 114370251B CN 202210043379 A CN202210043379 A CN 202210043379A CN 114370251 B CN114370251 B CN 114370251B
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- 239000003245 coal Substances 0.000 title claims abstract description 79
- 238000005065 mining Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000000926 separation method Methods 0.000 title claims abstract description 21
- 238000005553 drilling Methods 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims description 12
- 230000032798 delamination Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000004080 punching Methods 0.000 abstract description 2
- 238000005192 partition Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 8
- 238000007599 discharging Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 6
- 238000005457 optimization Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
Classifications
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a directional graded partition grouting method for a coal seam group downstream mining overlying strata separation layer, which comprises the following steps of S1, mining a coal seam: determining positions of key layers above a plurality of coal layers; s2, paving grouting hoses: paving a grouting hose in the uppermost key layer; s3, drilling vertical drilling: drilling vertical drilling holes in the direction of a plurality of key layers in the area which is not affected by mining, wherein the vertical drilling holes extend into the plurality of key layers; s4, installing a main grouting pipe: placing a main grouting pipe into the vertical drilling hole and communicating the main grouting pipe with a grouting hose; s5, grouting in a separation layer area: grouting into the main grouting pipe, and grouting into the uppermost layer separation layer area by the main grouting pipe through a grouting hose. The invention can realize embedding the main grouting pipe in the area which is not affected by mining, realizes the durability of the grouting method, realizes large-scale and standardized construction of multi-coal-seam layered mining overlying strata grouting, ensures grouting quantity, greatly improves grouting efficiency, saves grouting cost and reduces the workload of repeated punching.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a method for grouting in a directional grading and zoning way of a overlying strata separation layer in downstream mining of a coal seam group.
Background
After the underground coal seam is mined, the stress of the overlying rock primary rock above the goaf and the coal pillar is destroyed, so that the overlying rock moves, deforms, breaks and collapses, the ground surface is caused to sink, farmlands and buildings are damaged, and serious harm is caused to ecological environment. During the movement of the formation, there are a number of delamination zones consisting of delamination layers above the water-conducting fracture zone. The traditional grouting method for solving the problem of the separation layer belt is mostly to punch and grouting from the ground surface to the underground separation layer area, and the method is large in engineering quantity, and is time-consuming, labor-consuming and expensive. When multi-seam mining is encountered, the lower seam is mined, and the separation layer area still needs to be re-perforated for grouting.
Based on the existing situation, a method for directional grading and zonal grouting of a coal seam group downstream mining overlying strata separation layer is urgently needed, and the technical requirements of 'drilling a hole and injecting a whole well' are met.
Disclosure of Invention
The invention aims to provide a directional grading and zonal grouting method for a coal seam group downstream mining overlying strata, which solves the problems in the prior art, can embed a main grouting pipe in an area which is not affected by mining, realizes the durability of the grouting method, realizes large-scale and standardized construction of multi-coal seam layered mining overlying strata grouting, ensures grouting quantity, greatly improves grouting efficiency, saves grouting cost and reduces the workload of repeated punching.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a directional graded zonal grouting method for a overlying strata separation layer in downstream mining of a coal seam group,
s1, mining a coal seam: determining positions of key layers above a plurality of coal layers;
s2, paving grouting hoses: paving grouting hoses in the uppermost key layer;
s3, drilling vertical drilling: drilling vertical drilling holes in the direction of the key layers in the area which is not affected by mining, wherein the vertical drilling holes extend into the key layers;
s4, installing a main grouting pipe: placing a main grouting pipe into the vertical drilling hole and communicating the main grouting pipe with the grouting hose;
s5, grouting in a separation layer area: grouting into the main grouting pipe, grouting the uppermost layer of the separation layer area by the main grouting pipe through the grouting hose, and uniformly distributing discharge holes on the grouting hose;
s6, mining another coal seam: paving another grouting hose in the key layer above the other coal seam, and communicating the main grouting pipe and the other grouting hose;
s7, mining coal beds at different positions: and (6) repeating the step S6, and mining the coal beds at different positions.
Preferably, in step S3, the vertical drill hole is located in a stope line that is not affected by mining.
Preferably, in step S4, two adjacent main grouting pipes are communicated through a material dividing rotary pipe and a ball valve, the upper discharge end of the main grouting pipe is communicated with the material dividing rotary pipe feeding end, the material dividing rotary pipe discharging end is communicated with the ball valve feeding end, and the ball valve discharging end is communicated with the grouting hose feeding end and the lower main grouting pipe feeding end.
Preferably, a plurality of grouting hoses are respectively arranged on two sides of the ball valve, and grouting is performed in the grouting hoses on any side of the ball valve when the coal seam on the side is mined.
Preferably, in step S5, the main grouting pipe is grouting into the delamination area through the grouting hose, and water is introduced into the main grouting pipe after grouting is completed.
Preferably, in step S5, a grouting station and a booster pump are installed on the ground, and the grouting station is communicated with the main grouting pipe.
Preferably, in step S5, the ball valve discharge end is communicated with the grouting hose feed end, the ball valve discharge end is closed with the main grouting pipe feed end located below, and in step S6, the ball valve discharge end is closed with the grouting hose feed end, and the ball valve discharge end is communicated with the main grouting pipe feed end located below.
The invention discloses the following technical effects:
1. by adopting the method, the vertical drilling holes are drilled in the area which is not affected by mining, the main grouting pipe is arranged in the vertical drilling holes, and the horizontal grouting hose is paved at the position of the key layer, so that the technical requirements of 'drilling a hole and injecting a whole well' are realized, and the workload of repeated drilling is saved.
2. When the method of the invention is adopted, when the working surface of two-wing mining arrangement is met, the slurry can be conveyed into grouting hoses at different positions only by rotating the spherical valve on the material distributing rotary pipe.
3. After the coal seam mining on the upper part is finished, the spherical valve on the material distributing rotary pipe is only required to be adjusted, so that the slurry flows into the key layer corresponding to the coal seam on the lower part from the main grouting pipe, a large amount of manpower and material resource investment is saved, and the method is a novel and suitable sinking reducing method.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of a grouting process;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a front view of the grouting process;
FIG. 4 is a schematic illustration of the positional relationship of a grouting hose to a first coal seam;
the device comprises a 1-key layer, a 2-grouting hose, a 3-main grouting pipe, a 4-stoping line, a 5-material-dividing rotary pipe, a 6-ball valve, a 7-separation layer area, an 8-grouting station, a 9-booster pump, a 10-first coal bed, a 11-second coal bed, a 12-fracture area, a 13-caving area and a 14-goaf.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-4, the invention provides a directional graded zonal grouting method for a coal seam group downstream mining overlying strata,
s1, mining a coal seam: the key layer 1 location above several coal seams is determined. There is a first coal seam 10 and a second coal seam 11 to be mined, the first coal seam 10 being located above the second coal seam 11. First, the positions of the first coal seam 10 and the second coal seam 11 are determined, and the positions of the key layers 1 corresponding to the first coal seam 10 and the second coal seam 11 are determined.
S2, paving a grouting hose 2: paving a grouting hose 2 in the uppermost key layer 1; and paving grouting hoses 2 in the key layers 1 corresponding to the first coal seam 10.
S3, drilling vertical drilling: and drilling vertical drilling holes in the direction of the plurality of key layers 1 in the area which is not affected by mining, wherein the vertical drilling holes extend into the plurality of key layers 1. Vertical boreholes are drilled from the ground and are required to pass through the key layer 1 corresponding to the first coal seam 10 and the second coal seam 11.
S4, installing a main grouting pipe 3: a main grouting pipe 3 is put into the vertical drilling hole, and the main grouting pipe 3 and the grouting hose 2 are communicated. The main grouting pipe 3 is installed into the vertical drilling hole, the main grouting pipe 3 is used for circulating slurry, the main grouting pipe 3 passes through all the key layers 1, and the main grouting pipe 3 is respectively communicated with different key layers 1.
S5, grouting in a separation layer area 7: grouting is carried out in the main grouting pipe 3, and the main grouting pipe 3 is used for grouting the uppermost delamination area 7 through the grouting hose 2. Grouting operation is performed from the ground into the main grouting pipe 3, and slurry enters the grouting hose 2 through the main grouting pipe 3 and flows into the key layer 1 from the grouting hose 2.
In one embodiment of the invention, the grouting hose 2 is uniformly provided with discharge holes (not shown in the figure), the opening and closing of the discharge holes can be controlled, the position of the separation layer area 7 is ascertained along with the continuous exploitation of the working surface, and the directional grouting of the separation layer area 7 is realized through the opening and closing of the discharge holes.
S6, mining another coal seam: and paving another grouting hose 2 into the key layer 1 above the other coal seam, and communicating the main grouting pipe 3 with the other grouting hose 2. And after the first coal seam 10 is mined, communicating the main grouting pipe 3 with the grouting hose 2 in the key layer 1 corresponding to the second coal seam 11, so that the second coal seam 11 can be mined.
In one embodiment of the present invention, when the first coal seam 10 is mined, the grouting hose 2 is laid into the key layer 1 corresponding to the second coal seam 11.
S7, mining coal beds at different positions: and (6) repeating the step S6, and mining the coal beds at different positions. After the second coal seam 11 is mined, the main grouting pipe 3 is adjusted to be communicated with different grouting hoses 2, so that different coal seams can be mined.
In a further optimization scheme, in step S3, the vertical drilling holes are located in the stope line 4 which is not affected by mining. Because the main grouting pipe 3 passes through a plurality of coal beds and rock masses, when the coal beds and the rock masses are disturbed by exploitation, the main grouting pipe 3 can be influenced, even the main grouting pipe 3 cannot be used normally, when the coal beds are exploited, the exploitation stop line 4 is arranged, and the coal beds and the rock masses in the area of the exploitation stop line 4 are not disturbed by exploitation, so that vertical drilling holes are drilled in the exploitation stop line 4.
In a further optimization scheme, in the step S4, two adjacent main grouting pipes 3 are communicated through a material dividing rotary pipe 5 and a ball valve 6, the discharge end of the main grouting pipe 3 positioned above is communicated with the feed end of the material dividing rotary pipe 5, the discharge end of the material dividing rotary pipe 5 is communicated with the feed end of the ball valve 6, and the discharge end of the ball valve 6 is communicated with the feed end of the grouting hose 2 and the feed end of the main grouting pipe 3 positioned below. The presence of the ball valve 6 allows to control the communication of the main grouting pipe 3 with the different grouting hoses 2, so that grouting operations can be performed on the different critical layers 1 rapidly.
In a further optimization scheme, two sides of the ball valve 6 are respectively provided with a plurality of grouting hoses 2, and grouting is performed in each grouting hose 2 on any side of the ball valve 6 when mining a coal seam on the side. The main grouting pipe 3 is usually arranged in the middle position of the coal seam to be mined, namely, mining areas are formed on two wings of the ball valve 6, before mining, grouting hoses 2 are paved in the key layer 1 of any wing of the first coal seam 10, after paving, grouting hoses 2 are paved in the key layer 1 corresponding to the other wing when mining the coal seam of the wing, and grouting hoses 2 are paved in the key layer 1 corresponding to the second coal seam 11 when mining the coal seam of the other wing, so that paving of the grouting hoses 2 does not affect normal mining.
In one embodiment of the invention, the number of grouting hoses 2 located on any wing is preferably three, and all three grouting hoses 2 are communicated with the ball valve 6.
In a further optimization scheme, in step S5, the main grouting pipe 3 is used for grouting to the separation layer area 7 through the grouting hose 2, and water is introduced into the main grouting pipe 3 after grouting is completed. When the main grouting pipe 3 stops feeding the grouting hose 2 with the grouting liquid, water should be fed into the main grouting pipe 3 to prevent the grouting liquid from condensing in the main grouting pipe 3 and the grouting hose 2.
In a further optimization scheme, in step S5, a grouting station 8 and a booster pump 9 are installed on the ground, and the grouting station 8 is communicated with the main grouting pipe 3. The grouting station 8 is used to provide slurry and the booster pump 9 is intended to press the slurry into the formation.
In a further optimized scheme, in the step S5, the discharging end of the ball valve 6 is communicated with the feeding end of the grouting hose 2, the discharging end of the ball valve 6 is closed with the feeding end of the main grouting pipe 3 positioned below, and in the step S6, the discharging end of the ball valve 6 is closed with the feeding end of the grouting hose 2, and the discharging end of the ball valve 6 is communicated with the feeding end of the main grouting pipe 3 positioned below. When the first coal seam 10 is mined, the ball valve 6 corresponding to the first coal seam 10 and the main grouting pipe 3 leading to the second coal seam 11 are in a closed state, so that slurry cannot flow into the key layer 1 corresponding to the second coal seam 11. When the first coal seam 10 is mined, the ball valve 6 corresponding to the first coal seam 10 and the main grouting pipe 3 leading to the second coal seam 11 are in an open state, so that slurry flows into the key layer 1 corresponding to the second coal seam 11.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (4)
1. A directional graded zonal grouting method for a coal seam group downstream mining overlying strata separation layer is characterized in that,
s1, mining a coal seam: determining the positions of key layers (1) above a plurality of coal beds;
s2, paving a grouting hose (2): paving a grouting hose (2) in the uppermost key layer (1);
s3, drilling vertical drilling: drilling vertical drilling holes in the direction of a plurality of key layers (1) in the area which is not affected by mining, wherein the vertical drilling holes extend into the plurality of key layers (1);
s4, installing a main grouting pipe (3): placing a main grouting pipe (3) into the vertical drilling hole and communicating the main grouting pipe (3) with the grouting hose (2);
s5, grouting in a separation layer area (7): grouting into the main grouting pipe (3), grouting the main grouting pipe (3) into the separation layer area (7) at the uppermost layer through the grouting hose (2), and uniformly distributing discharge holes on the grouting hose (2);
s6, mining another coal seam: paving another grouting hose (2) into the key layer (1) above the other coal seam, and communicating the main grouting pipe (3) with the other grouting hose (2);
s7, mining coal beds at different positions: repeating the step S6 to mine the coal beds at different positions;
in the step S4, two adjacent main grouting pipes (3) are communicated through a material distributing rotary pipe (5) and a spherical valve (6), the discharge end of the main grouting pipe (3) positioned above is communicated with the feed end of the material distributing rotary pipe (5), the discharge end of the material distributing rotary pipe (5) is communicated with the feed end of the spherical valve (6), and the discharge end of the spherical valve (6) is communicated with the feed end of the grouting hose (2) and the feed end of the main grouting pipe (3) positioned below;
two sides of the ball valve (6) are respectively provided with a plurality of grouting hoses (2), and grouting is performed in the grouting hoses (2) on any side of the ball valve (6) when the coal seam on the side is mined;
in step S5, the discharge end of the ball valve (6) is communicated with the feed end of the grouting hose (2), the discharge end of the ball valve (6) is closed with the feed end of the main grouting pipe (3) located below, in step S6, the discharge end of the ball valve (6) is closed with the feed end of the grouting hose (2), and the discharge end of the ball valve (6) is communicated with the feed end of the main grouting pipe (3) located below.
2. The method for directional graded zonal grouting of a coal seam group downstream mining overlying strata, as claimed in claim 1, wherein the method comprises the following steps: in step S3, the vertical drilling holes are positioned in a stope line (4) which is not affected by mining.
3. The method for directional graded zonal grouting of a coal seam group downstream mining overlying strata, as claimed in claim 1, wherein the method comprises the following steps: in step S5, the main grouting pipe (3) performs grouting to the delamination area (7) through the grouting hose (2), and water is introduced into the main grouting pipe (3) after grouting is completed.
4. The method for directional graded zonal grouting of a coal seam group downstream mining overlying strata, as claimed in claim 1, wherein the method comprises the following steps: in step S5, a grouting station (8) and a booster pump (9) are installed on the ground, and the grouting station (8) is communicated with the main grouting pipe (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210043379.9A CN114370251B (en) | 2022-01-14 | 2022-01-14 | Coal seam group downstream mining overlying strata separation layer directional grading zonal grouting method |
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| CN114370251B true CN114370251B (en) | 2023-08-18 |
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