CN210152690U - Fully-mechanized top coal caving working face roadway arrangement and support device along bottom plate rock stratum - Google Patents
Fully-mechanized top coal caving working face roadway arrangement and support device along bottom plate rock stratum Download PDFInfo
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- CN210152690U CN210152690U CN201920173520.0U CN201920173520U CN210152690U CN 210152690 U CN210152690 U CN 210152690U CN 201920173520 U CN201920173520 U CN 201920173520U CN 210152690 U CN210152690 U CN 210152690U
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Abstract
The utility model discloses a fully mechanized top coal caving face tunnel is arranged and strutting arrangement along the bottom plate rock stratum, belong to coal mining technical field, including U type canopy roof beam, U type canopy leg, the anchor rope roof beam, cable leg stock and cable leg roof beam, the both ends of U type canopy roof beam are fixed on U type canopy leg, the top of U type canopy roof beam sets up a plurality of anchor ropes, the one end of anchor rope is passed through the anchor rope roof beam and is fixed on U type canopy roof beam, the other end runs through coal bed bottom board and coal seam roof, be the coal seam between coal bed bottom board and the coal bed roof, the top of U type canopy roof beam contacts with the lower part of coal bed bottom board, set up the lock leg stock on the U type canopy leg of U type canopy roof beam both sides, the one end of lock leg stock is passed through the lock leg roof beam and is fixed on U type canopy leg. The support mode is suitable for roadway arrangement and support mode of fully mechanized top coal caving mining working face of extra-thick and extremely-soft coal seam, and has the advantages of high tunneling speed, good support effect, high safety and reliability, and effective guarantee of safe and efficient mining.
Description
Technical Field
The utility model relates to a coal mining fully-mechanized top coal caving working face, specifically speaking, the utility model relates to a fully-mechanized top coal caving working face tunnel arranges and struts the mode along the bottom plate rock stratum.
Background
The geological conditions of the coal seams in the coal mine areas are extremely complex, wherein the coal seams in the main coal mining area are extremely soft and extremely thick, the mining process is mainly a fully mechanized top coal caving process, the thickness of each coal seam is 8-15 m, and the hardness coefficient f is less than or equal to 0.3. The coal seam is characterized by extra thickness, extreme softness, great difficulty in top coal control during full coal tunneling and low tunneling single-feed efficiency. According to the technical requirements, the roadway arrangement is currently adopted by arranging in full coal along the bottom and adopting a U-shaped steel shed for supporting, so that the tunneling and the supporting in a coal bed are very difficult under the underground high ground stress environment, and the safe and efficient mining of the fully mechanized coal face is seriously restricted.
The main difficulties and disadvantages of the prior art are that:
1. the top plate is difficult to control, and the coal seam is extremely thick, soft and easy to leak, so that the roadway can be tunneled only in a small-circulation U-shaped steel shed supporting mode by erecting small shed shelves, advanced top protection measures such as water injection and wedge hitting are required, and the top plate is greatly threatened in safety.
2. The support is very difficult, because the soft anchor rod support of the coal seam is difficult to form holes, the anchorage is extremely poor, the loose circle of surrounding rock is large, the passive support mode of a semicircular arch U-shaped steel shed is adopted, the support effect is poor, the deformation of a roadway is large, and the excavation, the repair and the repair are often carried out before and after the excavation and the repair are carried out.
3. The tunneling progress is slow, and due to the large difficulty in controlling the soft coal roof, the labor intensity of shed supporting is high, the tunneling progress is slow, so that the mining is fast, the tunneling is slow, the mining is unbalanced, and the normal production continuation is influenced.
4. Unfavorable high-efficient stoping is U shaped steel canopy maintenance volume on the one hand, and when two lane advanced management of full-mechanized mining face, work load is big, and the recruitment is many, and intensity of labour is big, simultaneously because half arch U shaped steel canopy section is unfavorable for fully-mechanized mining advance support to be used, is unfavorable for fully-mechanized mining face two lane equipment standard to join in marriage, restricts safe high-efficient stoping.
5. The difficulty of disaster control is increased, the probability of caving of the caving roof is high when the tunnel is tunneled in the whole coal, the safety threat of the roof is high, and hidden dangers such as gas overrun and spontaneous ignition of the caving area are easy to occur. Along with the upgrading development of fully mechanized mining equipment and the requirement of safe and efficient mining of a thick coal seam, the difficult problems of coal top downward tunneling and supporting of a fully mechanized top coal caving working face are to be solved urgently.
Disclosure of Invention
The utility model aims to solve the technical problem that a be applicable to super thick extremely soft coal seam combine to adopt caving coal mining working face tunnel arrange and strut the mode, it is fast to tunnel, strut effectually, and fail safe nature is high, effectively ensures safe high-efficient exploitation.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: fully-mechanized top coal caving face roadway is arranged and supported along a bottom plate rock stratum, and the fully-mechanized top coal caving face roadway comprises a U-shaped shed beam, U-shaped shed legs, anchor cables, anchor cable beams, cable leg anchor rods and cable leg beams, wherein two ends of the U-shaped shed beam are fixed on the U-shaped shed legs, the top of the U-shaped shed beam is provided with a plurality of anchor cables, one ends of the anchor cables are fixed on the U-shaped shed beam through the anchor cable beams, the other ends of the anchor cables penetrate through the coal bed bottom plate and the coal bed top plate, a coal bed is arranged between the coal bed bottom plate and the coal bed top plate, the top of the U-shaped shed beam is contacted with the lower portion of the coal bed bottom plate, the U-shaped shed legs on two sides of the U-shaped shed beam are provided with leg locking anchor rods.
Preferably, the included angle between the U-shaped shed legs and the horizontal plane is 78-79 degrees.
The utility model provides an embodiment does, and the top coal working face tunnel is arranged and the mode of strutting along the bottom plate rock stratum to the full mechanized mining, including U type canopy roof beam, U type canopy leg, anchor rope roof beam, cable leg stock and cable leg roof beam, the both ends of U type canopy roof beam are fixed on U type canopy leg, and the top of U type canopy roof beam sets up a plurality of anchor ropes, and the one end of anchor rope is passed through the anchor rope roof beam and is fixed on U type canopy roof beam, and the other end runs through coal seam bottom board and coal seam roof, is the coal seam between coal seam bottom board and the coal seam roof, and the top of U type canopy roof beam stretches into the inside and contacts with the coal seam of coal seam, set up the lock leg stock on the U type canopy leg of U type canopy roof beam both sides, the one end of lock leg stock is passed through the lock leg roof beam.
The utility model provides an embodiment does, and the top coal working face tunnel is arranged and the mode of strutting along the bottom plate rock stratum to the full mechanized mining, including U type canopy roof beam, U type canopy leg, anchor rope roof beam, cable leg stock and cable leg roof beam, the both ends of U type canopy roof beam are fixed on U type canopy leg, and the top of U type canopy roof beam sets up a plurality of anchor ropes, and the one end of anchor rope is passed through the anchor rope roof beam and is fixed on U type canopy roof beam, and the other end runs through coal seam bottom board and coal seam roof board, is the coal seam between coal seam floor and the coal seam roof board, and the certain distance of interval between the top of U type canopy roof beam and the coal seam floor, set up the lock leg stock on the U type canopy leg of U type canopy roof beam both sides, the one end of lock leg stock is passed through lock leg roof beam and is.
Adopt the technical scheme of the utility model, can obtain following beneficial effect:
(1) and the roadway position is optimized, and the safety of the top plate is realized. The roadway is arranged in the rock stratum, so that the frequent rib caving phenomenon caused by construction in an extremely soft coal seam is avoided, the safety management of a top plate is facilitated, and meanwhile, disaster threats such as a large amount of gas gushes out caused by rib caving of the coal seam are avoided.
(2) The supporting process is improved, and stable supporting is realized. Utilize anchor rope roof beam and lock leg stock to improve U shaped steel canopy and strut intensity, solved the loose circle in extremely soft coal seam big, pressure shows strongly, the yielding difficult problem of support, simultaneously make full use of the stability and the self-supporting ability of rock, improve and strut the effect.
(3) The section form is optimized, and conditions are created for the standard allocation and efficient stoping of fully-mechanized mining face equipment. The roadway section can be well adapted to the installation of new equipment such as a forepoling and an end bracket of a fully mechanized top coal caving working face, the two-roadway forepoling management procedure is simplified, the labor intensity of workers is reduced, meanwhile, the working face is high in propelling speed, the recovery efficiency is high, the yield per unit is obviously improved, and safe and efficient recovery is realized.
(4) The tunneling process is simplified, and the single-feed efficiency is improved. The method is characterized in that blasting excavation technology is adopted for tunneling under the top of the extremely soft coal seam, after the horizon is optimized, comprehensive excavation technology is adopted for construction, meanwhile, due to the fact that the phenomenon of caving is reduced, manual advanced hitting and wedge temporary supporting is not frequently adopted, the circulation progress is improved by 1 time, and the single-feeding efficiency is improved by more than 30%.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a cross-sectional view of a coal-supporting roof full-rock arrangement roadway;
FIG. 2 is a sectional view of a coal supporting roof full-rock arrangement roadway along the trend;
FIG. 3 is a cross-sectional view of a coal-supporting roof semi-coal rock arrangement roadway;
FIG. 4 is a sectional view of a coal-supporting roof semi-coal rock arrangement roadway along the trend;
FIG. 5 is a cross-sectional view of a pillar-retaining full-rock arrangement roadway;
FIG. 6 is a sectional view of the pillar-retaining full-rock arrangement roadway along the trend;
the labels in the above figures are: 1. a coal seam; 2. a coal seam floor; 3. a coal seam roof; 4. a U-shaped shed beam; 5. u-shaped shed legs; 6. an anchor cable; 7. an anchor cable beam; 8. locking the leg anchor rod; 9. a leg-locking beam.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings, in which the shapes, structures, mutual positions and connection relationships of the respective members, the functions of the respective portions, the operation principles, and the like of the respective members are described.
As shown in fig. 1 and 2, the support roof is arranged in full rock, that is, a tunnel is constructed in a rock stratum of a coal seam floor 2, the roof of the tunnel sees coal, the support roof is constructed, the top of a U-shaped shed beam 4 is in contact with the coal seam floor 2, the top of the U-shaped shed beam 4 is fixed on the coal seam through a plurality of anchor cables 6, U-shaped shed legs 5 are fixed on the rock on the edge of the tunnel through leg locking anchor rods 8, two sides and the tunneling head-on end surface of the tunnel are both rocks, so that the caving prevention and roof caving caused by the caving are facilitated, meanwhile, the surrounding rock loosening ring is small in the rock stratum, so that the stable support is facilitated, and the included angle between the U-shaped shed legs.
As shown in fig. 3 and 4, the arrangement of the coal supporting roof is half coal rock, namely the top of the U-shaped shed beam 4 is positioned in a tunnel section, the upper part of the U-shaped shed beam 1/3-1/2 is in a coal seam, the lower half part of the U-shaped shed beam is in a bottom plate rock layer of the coal seam, the top of the U-shaped shed beam 4 is fixed on the coal seam through a plurality of anchor cables 6, and the U-shaped shed legs 5 are fixed on rocks at the sides of the tunnel through leg locking anchor rods 8.
As shown in fig. 5 and 6, for the whole rock arrangement of rock pillar, the top of the U-shaped shed beam 4 is located in the full section of the roadway and is arranged in the rock layer of the coal seam floor, the rock pillar of about 1m is reserved on the top plate, the top of the U-shaped shed beam 4 is fixed on the coal seam through a plurality of anchor cables 6, the U-shaped shed legs 5 are fixed on the rock beside the roadway through leg locking anchor rods 8, the top plate of the soft coal seam is prevented from being extracted and protruded, the workload of the advanced wedge collision is reduced, the roof plate management is favorably used, the roof falling phenomenon is reduced, and the mode is suitable for the non-.
1. Tunneling a roadway according to a designed layer:
and a fully-mechanized excavating process is adopted, and the circulation speed is 1.2-1.4 m. Selecting a concrete layer of a roadway according to coal bed conditions, mainly using mudstone as a coal bed bottom plate, enabling the thickness of the coal bed bottom plate to exceed 3m, adopting full-rock construction, and only following coal at the top of a support beam; the coal seam floor 2 is thin in mudstone, mainly made of hard sandstone, and constructed by adopting half coal rock, so that the thickness of broken hard rock is reduced, and meanwhile, the height of a coal wall is controlled, so that the phenomenon of rib caving is reduced; and the non-outburst coal seam can be constructed by adopting whole rock, and meanwhile, a rock stratum top plate of about 1m is reserved, so that the workload of leading collision wedge top protection is reduced, and the top plate of the soft coal seam is prevented from overflowing and leaking.
2. Supporting the roadway according to design parameters:
selecting the type of a contractible U-shaped steel shed and the form of a support according to the ground pressure, usually adopting 29U or 36U, generally selecting a flat roof beam and a trapezoidal support section, having larger top pressure, and selecting a micro (three-arch) arch shed; 2-3 rows of anchor cable beams are arranged on the top beam along the trend, and two anchor rod locking legs are additionally arranged on each shed leg on the two sides. The specific modes and parameters are as follows:
(1) the flexible support is supported: the flat-top U-shaped steel support is a three-section shed, the lap joint of the U-shaped steel is fixed by a limiting clamping cable, the shed distance is 600mm, 4 metal pull rods (2 at the top and 1 at each side) are arranged between the shed and the shed, the top plate adopts a double-resistance net and an iron back plate waist back, and the side part adopts a diamond net and an iron back plate waist back.
(2) And (3) anchor cable beam construction: the anchor cable beams are symmetrically arranged on the top plate according to the center line of the roadway in 2 rows, 3 rows can be arranged when the top pressure is large, the cable beams are 29U-shaped steel beams, holes with the diameter of 20 are formed in the middle, and each cable beam locks the U-shaped steel sheds with the 2 sheds.
(3) Lane anchor rod leg locking: the specification of the anchor rod is phi 22 multiplied by 3000mm, and the spacing is 1200 mm; 1 row of lock leg beams are respectively arranged on two sides of the roadway, the beams are U-shaped steel beams, each length is 1000mm, a hole with the diameter of 24 is formed in the middle, and each lock beam locks 2 shed U-shaped steel shed legs.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.
Claims (4)
1. Fully mechanized top coal caving working face tunnel arranges and strutting arrangement along the bottom plate rock stratum, its characterized in that: including U type canopy beam, U type canopy leg, anchor rope roof beam, cable leg stock and cable leg roof beam, the both ends of U type canopy beam are fixed on U type canopy leg, and the top of U type canopy beam sets up a plurality of anchor ropes, and the one end of anchor rope is passed through the anchor rope roof beam and is fixed on U type canopy beam, and the other end runs through coal seam bottom plate and coal seam roof, is the coal seam between coal seam bottom plate and the coal seam roof, and the top of U type canopy beam contacts with the lower part of coal seam bottom plate, set up the lock leg stock on the U type canopy leg of U type canopy beam both sides, the one end of lock leg stock is passed through the lock leg roof beam and is fixed on U type canopy leg, and the other end is fixed on the roadway wall in.
2. The fully mechanized top coal caving face roadway arrangement and support device of claim 1 along a floor rock stratum, characterized in that: the included angle between the U-shaped shed legs and the horizontal plane is 78-79 degrees.
3. Fully mechanized top coal caving working face tunnel arranges and strutting arrangement along the bottom plate rock stratum, its characterized in that: including U type canopy roof beam, U type canopy leg, anchor rope roof beam, cable leg stock and cable leg roof beam, the both ends of U type canopy roof beam are fixed on U type canopy leg, and the top of U type canopy roof beam sets up a plurality of anchor ropes, and the one end of anchor rope is passed through the anchor rope roof beam and is fixed on U type canopy roof beam, and the other end runs through coal seam bottom plate and coal seam roof, is the coal seam between coal seam bottom plate and the coal seam roof, and the top of U type canopy roof beam stretches into the inside and contacts with the coal seam in the coal seam, set up the lock leg stock on the U type canopy leg of U type canopy roof beam both sides, the one end of lock leg stock is passed through the lock leg roof beam and is fixed on U type canopy leg, and the.
4. Fully mechanized top coal caving working face tunnel arranges and strutting arrangement along the bottom plate rock stratum, its characterized in that: including U type canopy roof beam, U type canopy leg, anchor rope roof beam, cable leg stock and cable leg roof beam, the both ends of U type canopy roof beam are fixed on U type canopy leg, and the top of U type canopy roof beam sets up a plurality of anchor ropes, and the one end of anchor rope is passed through the anchor rope roof beam and is fixed on U type canopy roof beam, and the other end runs through coal seam bottom plate and coal seam roof, is the coal seam between coal seam bottom plate and the coal seam roof plate, and the certain distance of interval is between the top of U type canopy roof beam and the coal seam bottom plate, set up the lock leg stock on the U type canopy leg of U type canopy roof beam both sides, the one end of lock leg stock is passed through the lock leg roof beam and is fixed on U type canopy leg, and the.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109630168A (en) * | 2019-01-31 | 2019-04-16 | 淮北矿业股份有限公司 | Comprehensive extracting and caving face tunnel is arranged along floor strata and support pattern |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109630168A (en) * | 2019-01-31 | 2019-04-16 | 淮北矿业股份有限公司 | Comprehensive extracting and caving face tunnel is arranged along floor strata and support pattern |
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