CN216008455U - Secondary anti-overflow tight hole sealing device - Google Patents
Secondary anti-overflow tight hole sealing device Download PDFInfo
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- CN216008455U CN216008455U CN202122260970.3U CN202122260970U CN216008455U CN 216008455 U CN216008455 U CN 216008455U CN 202122260970 U CN202122260970 U CN 202122260970U CN 216008455 U CN216008455 U CN 216008455U
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Abstract
Tight hole sealing device of second grade anti-overflow, including hole sealing pipe and two annular anti-overflow baffles, hole sealing pipe concentric insert the hole sealing section of directional long drilling, the inboard that uses directional long drilling is preceding, interval fixed cover respectively around two annular anti-overflow baffles is on hole sealing pipe, lateral part and back lateral part are along the equal adhesive bonding of circumference and are had at least one fast reaction polyurethane bag before the outer pipe wall of hole sealing pipe, it has the fast reaction polyurethane bag between the fast reaction polyurethane bag of a plurality of fast reaction polyurethane bag that is located the front side and the back side to follow preceding back direction interval adhesive bonding on the outer pipe wall of hole sealing pipe. The utility model provides a drilling country rock crack is grown under the influence of stack dynamic pressure, shutoff country rock crack difficulty takes out the high problem of negative pressure, both shutoff drilling country rock crack, guarantee the compactedness of hole sealing material self again, the hole sealing is effectual.
Description
Technical Field
The utility model relates to a hole sealing technical field of gas is taken out and taken out in fracture area drilling, specific theory relates to a tight hole sealing device of second grade anti-overflow.
Background
At present, the gas emission quantity of the return air flow of the stope face of a coal mine is large, and the high gas concentration of the upper corner is a main factor which troubles the safety production of the stope face. In order to research the safe and efficient stoping face gas extraction technology, coal mine researchers research and develop a high-position gas extraction technology of a fracture zone at the top of a coal seam, and the problem of the stoping face gas is relieved to a certain extent. According to the high-level extraction technology of the fractured zone at the top of the coal seam, three vertical zones and three horizontal zones exist on the top of the coal seam, a hole fractured structure with different inner dimensions of a bending subsidence zone and the fractured zone is considered as a working face goaf, a way and a space are provided for gas migration, flowing and storage, the gas in the goaf is purified at the bending subsidence zone and the fractured zone due to high diffusivity and low viscosity of the gas, and the gas concentration in the fractured zone is obviously higher than that in a lower caving zone. If the drill hole is arranged in the fracture zone for extraction, the gas with high concentration and high purity is extracted, and the gas emission quantity of the return air flow of the working face and the gas concentration of the upper corner are effectively reduced. However, due to the influence of the traditional drilling technology, the effective length of a drill hole is short, the track cannot be controlled, the problems of short single-hole efficient extraction distance and low extracted gas concentration exist in the high-position gas extraction technology of the fractured zone at the top of the coal seam, the extraction effect is unstable, the cost is high, the drilling construction work amount is large, and the gas extraction effect is seriously influenced.
In recent years, directional long drilling construction technology and equipment in China are greatly developed, and directional drilling has the following advantages: firstly, a measurement-while-drilling system is adopted, the drilling track can fluctuate and is in a proper combination with the fracture of the top plate all the time, and the drilling extraction is ensured to be effective and stable; the single-hole construction depth is greatly improved, the overlap length of the drill holes and the unreasonable positions of the start and the end of the drill holes are reduced, and the single-hole gas extraction range is improved; the drilling machine is few in moving times, high in drilling efficiency and long in single-cycle control distance, construction period is effectively shortened, and the conflict of excavation and replacement is relieved. Therefore, the technology for extracting gas by directional long drilling at the top is emphasized, namely, the technology and equipment for directional drilling under a coal mine are utilized to construct long-distance large-diameter directional drilling in a fracture zone of a coal seam roof, and the roof fracture is used as a gas flow channel to extract gas at an overlying rock layer, a coal seam and an upper corner of a working face, so that the gas flow direction distribution of a goaf is changed, the gas flow of the goaf and a neighboring layer to a working face along a groove is effectively reduced, and the problem of gas overrun of the upper corner of the working face and a return airway caused by a large amount of gas emission of the goaf or the neighboring layer is fundamentally solved, thereby ensuring the safe operation of the coal mining working face and improving the production capacity of the mining face.
The method is characterized in that a key technology for extracting gas by top directional long drill holes is analyzed, and besides the construction of the top directional long drill holes at designed positions, slopes and planes, the hole sealing quality is another key technology related to the extraction effect. If the hole sealing method and the hole sealing process are not enough to support the sealing effect required by high-negative-pressure extraction for a long time under the influence of dynamic pressure on the extraction drill hole, the target of high-concentration, high-purity and long-distance long-term extraction is difficult to realize by the directional long drill hole at the top.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a tight hole sealing device of second grade anti-overflow, the utility model provides a stack dynamic pressure influences down the drilling country rock crack and develops, and shutoff country rock crack difficulty takes out and adopts the high problem of negative pressure, both shutoff drilling country rock crack, guarantee the compactedness of hole sealing material self again, the hole sealing is effectual.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a secondary anti-overflow tight hole sealing device comprises a hole sealing pipe and two annular anti-overflow baffles, wherein the hole sealing pipe is formed by connecting a plurality of sections of seamed steel pipes end to end in sequence through screw threads, the hole sealing pipe is concentrically inserted into a hole sealing section of a directional long drill hole, the inner side of the directional long drill hole is taken as the forward direction, the inner diameter of each annular anti-overflow baffle is the same as the outer diameter of the hole sealing pipe, the outer diameter of each annular anti-overflow baffle is the same as the inner diameter of the hole sealing section of the directional long drill hole, the two annular anti-overflow baffles are fixedly sleeved on the hole sealing pipe at intervals in the front and at the back, the annular anti-overflow baffle on the front side is arranged close to the inner side port of the hole sealing pipe, the annular anti-overflow baffle on the back side is arranged close to the outer side port of the hole sealing pipe, at least one fast reaction polyurethane bag is fixedly adhered to the front side part and the back side of the annular anti-overflow baffle on the front side along the circumferential direction of the outer pipe wall of the hole sealing pipe, the fast reaction polyurethane bag of rear side is close to the annular anti-overflow baffle setting of rear side and is located the front side of the annular anti-overflow baffle of rear side, and the outer pipe wall of hole sealing pipe is gone up along preceding rear direction interval adhesive fixation has the fast reaction polyurethane bag between the fast reaction polyurethane bag that a plurality of is located the fast reaction polyurethane bag of front side and the fast reaction polyurethane bag of rear side, and each fast reaction polyurethane bag all fix on hole sealing pipe through sticky tape winding ligature.
The inner rings of the two annular anti-overflow baffles are fixedly connected with the outer pipe wall of the hole sealing pipe through gluing, and the annular anti-overflow baffles on the front sides are fastened on the hole sealing pipe through countersunk bolts.
The excircle of the annular anti-overflow baffle plate on the front side comprises a cylindrical anti-overflow section and a conical guide section, the conical guide section is positioned on the front side of the cylindrical anti-overflow section and is small in the front and large in the back, and the countersunk head bolt is arranged on the cylindrical anti-overflow section.
The working method of the secondary anti-overflow tight hole sealing device specifically comprises the following steps:
(1) after the drilling construction is finished, checking whether a hole sealing section of the drilled hole is straight and whether the reaming length meets the design requirement by using a connectable probe which is processed in advance;
(2) preparing hole sealing materials, equipment and tools: the anti-overflow device comprises a hole sealing pipe, an annular anti-overflow baffle, a normal-speed reaction polyurethane bag, a quick reaction polyurethane bag and an adhesive; the hole sealing pipe comprises a plurality of sections of seamed steel pipes, and the length of each section of seamed steel pipe is processed according to 2-3 m, so that the hole sealing pipe is convenient to transport and install; in order to ensure the hole sealing quality and prevent the disjointed joints and the gaps from leaking air, the seamed steel pipes are connected by screw threads, and the substances are transported to the site in advance and are stacked neatly;
(3) constructing a first-level inner-side anti-overflow device: the annular anti-overflow baffle is well installed and fixed by an adhesive at a position about 1m away from the inner side port of the hole sealing pipe, so that a foundation is laid for preventing the secondary anti-overflow substance polyurethane from overflowing during expansion and before solidification to block the inner side port of the hole sealing pipe;
(4) and constructing a secondary inner side anti-overflow device: 1-2 quick reaction polyurethane bags are selected to tear a spacing layer for separating a polyurethane oxidant and a reducing agent, after the polyurethane bags and the reducing agent are quickly kneaded to be uniformly mixed, an adhesive tape is bound on a hole sealing pipe on the outer side of an annular anti-overflow baffle, and a foundation is laid for preventing a polyurethane hole sealing material of a secondary main body anti-overflow device from overflowing before solidification when expanding and blocking an inner side opening of the hole sealing pipe;
(5) constructing a secondary main body anti-overflow device: selecting a plurality of normal-speed reaction polyurethane bags, using the bags at two per meter until reaching an outer primary anti-overflow device, tearing a spacing layer for separating a polyurethane oxidant and a polyurethane reducing agent, quickly kneading the polyurethane oxidizing agent and the polyurethane reducing agent to uniformly mix the polyurethane oxidizing agent and the polyurethane reducing agent, and binding the polyurethane bags on a hole sealing pipe at the outer side of a secondary inner anti-overflow device by using an adhesive tape;
(6) constructing a secondary outside anti-overflow device: selecting 1-2 quick reaction polyurethane bags, tearing a spacing layer for separating a polyurethane oxidant and a reducing agent, quickly kneading the polyurethane oxidant and the reducing agent to uniformly mix the polyurethane oxidant and the reducing agent, and then binding the polyurethane oxidizing agent and the reducing agent on a hole sealing pipe on the outer side of a secondary main body anti-overflow device by using an adhesive tape to prevent a polyurethane hole sealing material of the secondary main body anti-overflow device from overflowing before solidification when expanding and blocking an outer side opening of the hole sealing pipe to lay a foundation;
(7) constructing a primary outer side anti-overflow device: at a position 0.3-0.5 m away from the outer side port of the hole sealing pipe, the annular anti-overflow baffle is well installed and fixed by using an adhesive, and a foundation is laid for preventing the secondary anti-overflow substance polyurethane from overflowing during expansion and before solidification and blocking the outer side port of the hole sealing pipe;
(8) connecting the seamed steel pipes section by section, sequentially feeding the seamed steel pipes into a drill hole by a drilling machine, and mounting the last seamed steel pipe after the primary anti-overflow device and the secondary anti-overflow device at the outer side are mounted and fixed;
(9) after the seamed steel pipe is completely installed, the reaction and the expansion of the polyurethane material oxidant and the reducing agent are completed, under the limiting action of the annular anti-overflow baffle plates on the outer side and the inner side of the hole sealing pipe, the polyurethane material oxidant and the reducing agent radially expand in the fixed-length drill hole under high pressure and permeate and fill into the surrounding rock cracks of the drill hole, and the purpose of tight hole sealing is achieved.
Compared with the prior art, the utility model has substantive characteristics and progress, specifically speaking, the utility model discloses select before the reaction, be liquid in the reaction, be solid after the reaction, reaction time is controllable, the polyurethane hole sealing material that seepage prevention, sealing, anti-seismic performance are good, solved service cycle long, hole sealing material warp under the influence of stack dynamic pressure, destroy, leak gas to and long distance hole sealing operation difficulty scheduling problem, the utility model solves the problem that the hole sealing material is difficult to take out and take out the negative pressure height under the influence of stack dynamic pressure; the primary anti-overflow baffle (plastic or plastic plate) which is small in size and convenient to install is utilized to restrain the position of a normal-speed reaction polyurethane bag close to the outer side port and the inner side port of the hole sealing pipe after reaction and expansion, so that the primary anti-overflow baffle becomes a secondary effective anti-overflow object of a main hole sealing material, a condition is provided for reaction of polyurethane under a relatively airtight space condition, the polyurethane pressure and the capability of permeating into a hole drilling surrounding rock crack before solidification are improved, the hole drilling surrounding rock crack is blocked, the compactness of the hole sealing material is ensured, the phenomenon that the polyurethane overflows into the hole sealing pipe due to unlimited expansion can be prevented, the hole sealing pipe is blocked, the hole drilling extraction capability is reduced, and even the hole sealing effect is ensured.
The utility model provides a drilling country rock crack is grown under the influence of stack dynamic pressure, shutoff country rock crack difficulty takes out the high problem of negative pressure, both shutoff drilling country rock crack, guarantee the compactedness of hole sealing material self again, the hole sealing is effectual.
Drawings
FIG. 1 is a schematic view of the sealing effect of the polyurethane sealing material when it is not expanded.
FIG. 2 is a schematic diagram of the hole sealing effect of the polyurethane hole sealing material after hole sealing and after complete expansion.
Fig. 3 is a schematic cross-sectional view of the hole sealing pipe and the directional long drill hole surrounding rock when the polyurethane hole sealing material of the present invention is not expanded.
Fig. 4 is a schematic cross-sectional view of the hole sealing pipe and directional long-drilled surrounding rock after the polyurethane hole sealing material of the present invention is completely expanded.
Fig. 5 is a cross-sectional view of the front annular spill-proof baffle of the present invention.
Detailed Description
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1-5, a two-stage anti-overflow tight hole sealing device comprises a hole sealing pipe 2 and two annular anti-overflow baffles 3, wherein the hole sealing pipe 2 is formed by connecting a plurality of sections of seamed steel pipes in an end-to-end manner in sequence through screw threads, the hole sealing section of a directional long drill hole 1 is inserted into the hole sealing pipe 2 concentrically, the inner side of the directional long drill hole 1 is forward, the inner diameter of the annular anti-overflow baffle 3 is the same as the outer diameter of the hole sealing pipe 2, the outer diameter of the annular anti-overflow baffle 3 is the same as the inner diameter of the hole sealing section of the directional long drill hole 1, the two annular anti-overflow baffles 3 are sleeved on the hole sealing pipe 2 at intervals, the annular anti-overflow baffle 3 on the front side is adjacent to the inner side port of the hole sealing pipe 2, the annular anti-overflow baffle 3 on the rear side is adjacent to the outer side port of the hole sealing pipe 2, at least one rapid reaction polyurethane bag 5 is fixed on the front side and the annular anti-overflow baffle 3 on the front side is adjacent to the annular anti-overflow baffle 3 on the front side and is located on the front side along the annular anti-overflow baffle 5 The rear side of baffle 3, the anti-overflow baffle 3 setting of the annular that the quick reaction polyurethane bag 5 of rear side is close to the rear side just is located the front side of the anti-overflow baffle 3 of rear side, it has a plurality of to be located the quick reaction polyurethane bag 5 of front side and the constant speed reaction polyurethane bag 4 between the quick reaction polyurethane bag 5 of rear side to glue fixedly along preceding rear direction interval on the outer pipe wall of hole sealing pipe 2, each quick reaction polyurethane bag 5 and each constant speed reaction polyurethane bag 4 all fix on hole sealing pipe 2 through sticky tape (not shown) winding ligature.
The inner rings of the two annular anti-overflow baffles 3 are fixedly connected with the outer pipe wall of the hole sealing pipe 2 through gluing, and the annular anti-overflow baffles 3 on the front side are fastened on the hole sealing pipe 2 through countersunk bolts 6.
The excircle of the annular anti-overflow baffle 3 on the front side comprises a cylindrical anti-overflow section 7 and a conical guide section 8, the conical guide section 8 is positioned on the front side of the cylindrical anti-overflow section 7, the front side is small, the rear side is large, and the countersunk head bolt 6 is arranged on the cylindrical anti-overflow section 7. The countersunk head bolt 6 further improves the tightness of the annular anti-overflow baffle 3 at the front side, ensures that the annular anti-overflow baffle 3 at the front side is fixed in position, and the conical guide section 8 plays a role in guiding and reduces the insertion resistance when the hole sealing pipe 2 is inserted into the directional long drill hole 1. The arrow in fig. 5 indicates the insertion direction of the blind pipe 2.
The working method of the secondary anti-overflow tight hole sealing device specifically comprises the following steps:
(1) after the drilling construction is finished, checking whether a drilling hole sealing section is straight or not and whether the reaming length meets the design requirement or not by using a connectable probe (each section is 3m and the diameter is 25 mm) which is processed in advance;
(2) preparing hole sealing materials, equipment and tools: the anti-overflow device comprises a hole sealing pipe 2, an annular anti-overflow baffle 3, a normal-speed reaction polyurethane bag 4, a quick reaction polyurethane bag 5 and an adhesive; the hole sealing pipe 2 comprises a plurality of sections of seam steel pipes, and the length of each section of seam steel pipe is 2-3 m; in order to ensure the hole sealing quality and prevent the disjointed joints and the gaps from leaking air, the seamed steel pipes are connected by screw threads, and the substances are transported to the site in advance and are stacked neatly;
(3) constructing a first-level inner-side anti-overflow device: the annular anti-overflow baffle 3 is well installed and fixed by an adhesive at a position about 1m away from the inner side port of the hole sealing pipe 2, and a foundation is laid for preventing the secondary anti-overflow substance polyurethane from overflowing during expansion and before solidification and blocking the inner side port of the hole sealing pipe 2;
(4) and constructing a secondary inner side anti-overflow device: selecting 1-2 quick reaction polyurethane bags 5, tearing a spacing layer for separating a polyurethane oxidant and a reducing agent, quickly kneading the polyurethane oxidant and the reducing agent to uniformly mix the polyurethane oxidant and the reducing agent, and then binding the polyurethane oxidizing agent and the reducing agent on a hole sealing pipe 2 on the outer side of an annular anti-overflow baffle 3 by using an adhesive tape to prevent the polyurethane hole sealing material of a secondary main body anti-overflow device from overflowing when expanding and before solidifying, and laying a foundation for blocking an inner side opening of the hole sealing pipe 2;
(5) constructing a secondary main body anti-overflow device: selecting a plurality of normal-speed reaction polyurethane bags 4, using the bags at two per meter until reaching an outer primary anti-overflow device, tearing a spacing layer for separating a polyurethane oxidant and a polyurethane reducing agent, quickly kneading the polyurethane oxidant and the polyurethane reducing agent to uniformly mix the polyurethane oxidant and the polyurethane reducing agent, and binding the polyurethane bags on a hole sealing pipe 2 at the outer side of a secondary inner anti-overflow device by using an adhesive tape;
(6) constructing a secondary outside anti-overflow device: selecting 1-2 quick reaction polyurethane bags 5, tearing a spacing layer for separating a polyurethane oxidant and a reducing agent, quickly kneading the polyurethane oxidant and the reducing agent to uniformly mix the polyurethane oxidant and the reducing agent, and then binding the polyurethane oxidizing agent and the reducing agent on a hole sealing pipe 2 on the outer side of a secondary main body anti-overflow device by using an adhesive tape, so as to lay a foundation for preventing the polyurethane hole sealing material of the secondary main body anti-overflow device from overflowing before solidification when expanding and blocking an outer side opening of the hole sealing pipe 2;
(7) constructing a primary outer side anti-overflow device: the annular anti-overflow baffle 3 is well installed and fixed by an adhesive at a position 0.3-0.5 m away from the outer side end opening of the hole sealing pipe 2, so that a foundation is laid for preventing the secondary anti-overflow substance polyurethane from overflowing during expansion and before solidification and blocking the outer side opening of the hole sealing pipe 2;
(8) connecting the seamed steel pipes section by section, sequentially feeding the seamed steel pipes into a drill hole by a drilling machine, and mounting the last seamed steel pipe after the primary anti-overflow device and the secondary anti-overflow device at the outer side are mounted and fixed;
(9) after the seamed steel pipe is completely installed, the reaction and expansion of the polyurethane material oxidant and the reducing agent are completed, under the limiting action of the annular anti-overflow baffle plates 3 on the outer side and the inner side of the hole sealing pipe 2, the polyurethane material oxidant and the reducing agent radially expand in the fixed-length drilled hole under high pressure and permeate and fill into the drilled hole surrounding rock cracks, and the purpose of tight hole sealing is achieved.
The above embodiments are only used for illustrating but not limiting the technical solution of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that; the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
Claims (3)
1. Tight hole sealing device of second grade anti-overflow, its characterized in that: the anti-overflow device comprises a hole sealing pipe and two annular anti-overflow baffles, wherein the hole sealing pipe is formed by connecting a plurality of sections of seamed steel pipes in an end-to-end manner in sequence through screw threads, the hole sealing section of a directional long drill hole is inserted into the same center of the hole sealing pipe, the inner side of the directional long drill hole is taken as the front direction, the inner diameter of each annular anti-overflow baffle is the same as the outer diameter of the hole sealing pipe, the outer diameter of each annular anti-overflow baffle is the same as the inner diameter of the hole sealing section of the directional long drill hole, the two annular anti-overflow baffles are fixedly sleeved on the hole sealing pipe at intervals in the front and at the back, the annular anti-overflow baffle on the front side is arranged close to the inner side port of the hole sealing pipe, the annular anti-overflow baffle on the back side is arranged close to the outer side port of the hole sealing pipe, at least one fast reaction polyurethane bag is fixedly adhered to the front side part and the back side of the annular anti-overflow baffle on the front side along the circumferential direction of the outer pipe wall of the hole sealing pipe, the fast reaction polyurethane bag of rear side is close to the annular anti-overflow baffle setting of rear side and is located the front side of the annular anti-overflow baffle of rear side, and the outer pipe wall of hole sealing pipe is gone up along preceding rear direction interval adhesive fixation has the fast reaction polyurethane bag between the fast reaction polyurethane bag that a plurality of is located the fast reaction polyurethane bag of front side and the fast reaction polyurethane bag of rear side, and each fast reaction polyurethane bag all fix on hole sealing pipe through sticky tape winding ligature.
2. The secondary anti-overflow tight sealing device according to claim 1, characterized in that: the inner rings of the two annular anti-overflow baffles are fixedly connected with the outer pipe wall of the hole sealing pipe through gluing, and the annular anti-overflow baffles on the front sides are fastened on the hole sealing pipe through countersunk bolts.
3. The secondary anti-overflow tight sealing device according to claim 2, characterized in that: the excircle of the annular anti-overflow baffle plate on the front side comprises a cylindrical anti-overflow section and a conical guide section, the conical guide section is positioned on the front side of the cylindrical anti-overflow section and is small in the front and large in the back, and the countersunk head bolt is arranged on the cylindrical anti-overflow section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122260970.3U CN216008455U (en) | 2021-09-17 | 2021-09-17 | Secondary anti-overflow tight hole sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122260970.3U CN216008455U (en) | 2021-09-17 | 2021-09-17 | Secondary anti-overflow tight hole sealing device |
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| CN216008455U true CN216008455U (en) | 2022-03-11 |
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| CN202122260970.3U Active CN216008455U (en) | 2021-09-17 | 2021-09-17 | Secondary anti-overflow tight hole sealing device |
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| CN (1) | CN216008455U (en) |
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2021
- 2021-09-17 CN CN202122260970.3U patent/CN216008455U/en active Active
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