CN210919066U - Fully mechanized caving face coal top down integrated tunneling device - Google Patents
Fully mechanized caving face coal top down integrated tunneling device Download PDFInfo
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- CN210919066U CN210919066U CN201920992348.1U CN201920992348U CN210919066U CN 210919066 U CN210919066 U CN 210919066U CN 201920992348 U CN201920992348 U CN 201920992348U CN 210919066 U CN210919066 U CN 210919066U
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Abstract
The utility model discloses a combine and put working face under coal top integration tunnelling device belongs to colliery coal mining technology field, the canopy roof beam one side of U type canopy roof beam sets up the lock leg stock, the lock leg stock injects in the lateral wall in coal mine tunnel, the tip of lock leg stock is connected with a side of U type canopy roof beam, another side of canopy roof beam of U type canopy roof beam sets up slip casting formula stock, slip casting formula stock injects in coal mine tunnel's the lateral wall, the tip of slip casting formula stock is connected with the opposite side limit of U type canopy roof beam, the top of U type canopy roof beam sets up many self-drilling anchor rods, the vertical many anchor ropes that set up in top of U type canopy roof beam. The utility model discloses can promote tunnelling efficiency under the coal roof, reduce intensity of labour, improve mining safety.
Description
Technical Field
The utility model relates to a colliery coal mining technology field, specifically speaking, the utility model relates to a combine and put working face under coal top integration tunnelling device.
Background
The fully-mechanized top coal caving mining method for the thick coal seam has low cost, large capacity and high efficiency, and is one of important technical methods for coal mine intensive safe and efficient mining. In recent years, the fully mechanized top coal caving mining technology is rapidly developed, the capacity of the three-machine matching equipment is upgraded, and the capacity is greatly improved. Therefore, the key for realizing the sustainable development of mine production is to accelerate the production preparation progress of the fully mechanized top coal caving working face and keep the excavation balance. When a tunnel of a soft and thick coal seam fully-mechanized top coal caving working face is tunneled, the crossheading and the cutting hole are all tunneled in the whole coal along a coal seam bottom plate, and the top coal and the two sides of coal walls are easy to be stripped and roof fall during tunneling construction. The vibration that produces when big gun is dug or is fully mechanized and dig the construction is changeed and is caused the piece group roof fall, brings roof and gas accident, consequently, mostly uses manual hand pick to tunnel to give first place to, and the circulation progress is little, and because the loose circle is big during drilling of soft coal top, is difficult to the pore-forming, unable anchor rod (cable) are strutted, all adopts semi-circular arch U shaped steel canopy to strut, and every circulation need adopt the manual work to beat the leading top protection mode of wedge, singly advance inefficiency, intensity of labour is big, and the potential safety hazard is many. Not only influences the mining balance, but also brings difficulty to the application of the advanced hydraulic support to the gate way during the stoping of the working face and influences the stoping efficiency.
Disclosure of Invention
The utility model aims to solve the technical problem that a combine and put integrated tunnelling device under working face coal top is provided, the device has solved the present soft coal top and the coal group control degree of difficulty that combine to adopt the caving coal working face to exist big, and passive shed support effect is poor, and the tunnelling is singly advanced the problem of inefficiency.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: combine and put working face coal top down integration tunnelling device, including the lock leg stock, from boring formula stock, anchor rope, slip casting formula stock and U type canopy roof beam, canopy roof beam one side of U type canopy roof beam sets up the lock leg stock, and the lock leg stock injects in the lateral wall in coal mine tunnel, and the tip of lock leg stock is connected with one side of U type canopy roof beam, and another side of canopy roof beam of U type canopy beam sets up the slip casting formula stock, and the slip casting formula stock injects in the lateral wall in coal mine tunnel, and the tip of slip casting formula stock is connected with the opposite side of U type canopy roof beam, the top of U type canopy beam sets up many from boring formula stock, and the vertical many anchor ropes that set up in top of U type canopy roof beam, the one end of anchor rope is fixed in the tunnel, and the other end is fixed at the top of U type canopy.
Preferably, the top of the U-shaped shed beam is a flat roof.
Preferably, a plurality of steel belts are transversely arranged at the top of the self-drilling anchor rod, and a plurality of anchor cables are uniformly distributed on the steel belts.
Preferably, the depth of the anchoring end of the anchor cable entering the stable rock stratum is not less than 1.5 m.
The integrated tunneling process for the coal roof of the fully mechanized caving face comprises the following steps:
A. placing two side edges of a U-shaped shed beam into a rock stratum, wherein the top of the U-shaped shed beam is in contact with a coal bed, and the two side edges of the U-shaped shed beam are arranged in the rock stratum to improve the stability;
B. the self-drilling anchor rod is driven into a roof coal seam in advance to serve as a support, tunneling is carried out under the shield, the length of the self-drilling anchor rod is 2m per section, and the concrete requirements are as follows:
(1) the arrangement position of the self-drilling type anchor rod is close to the top of the U-shaped shed beam, and the construction is carried out by adopting a pneumatic drill or an anchor rod drilling machine and a pneumatic hammer;
(2) the distance between the self-drilling anchor rod frameworks is 100-150 mm, the angles and the directions of all the self-drilling anchor rod frameworks are consistent, and a plane is ensured to form, and the included angle between the plane and a roadway top plate is 3-5 degrees;
(3) after the construction of the self-drilling anchor rod framework is finished, reinforcing the tail end of the self-drilling anchor rod framework by adopting a steel belt to match with an anchor cable, wherein the included angle between the anchor cable and the self-drilling anchor rod is 65-80 degrees;
(4) when the advanced self-drilling anchor rods are erected forwards, the U-shaped shed beams are tightly attached to the upper metal framework, after the construction is carried out to the stubble pressing position, the next circular metal framework construction is carried out again under the adjacent U-shaped shed beams facing the head, the erection is carried out after the distance between the two adjacent U-shaped shed beams is reduced by 150-200 mm in sequence, and the circulation is carried out in sequence;
C. the middle of the self-drilling anchor rod is hollow, the self-drilling anchor rod is used for grouting a roof protection range, if a roadway is excavated along the air, grouting and reinforcing are carried out on the roadway along the air side, the overall stability of the roadway is improved, when the construction is advanced from the self-drilling anchor rod framework, one grouting bolt is arranged, the framework construction is finished, and the grouting work is also finished.
Adopt the technical scheme of the utility model, can obtain following beneficial effect:
the integrated tunneling device under the coal roof of the fully mechanized caving face innovatively applies a drilling, anchoring and grouting integrated tunneling process and method in order to solve the problems of high control difficulty of soft coal roof and coal side, poor passive shed supporting effect and low tunneling single-advancing efficiency of the current fully mechanized caving face. The process and the method change the traditional operation modes of manual tunneling, passive support and the like, optimize the position adjustment of the roadway, change the coal roadway into a half-rock roadway or a full-rock roadway, change the small-cycle manual wedge-impacting top-protecting operation into a large-cycle hollow self-drilling type anchor rod framework top-protecting and grouting reinforcement integrated operation, change the semicircular arch U-shaped steel shed support into a flat roof and anchor rope beam composite support, and realize the integrated rapid construction of the main tunneling process, thereby improving the tunneling efficiency under the coal roof, reducing the labor intensity and improving the mining safety.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 is a layout view of a roadway;
fig. 2 is a layout view (plane) of a leading frame self-drilling anchor rod;
fig. 3 is a schematic view (section) of a leading frame and a roof reinforced anchor cable support;
FIG. 4 is a cross-sectional view of the support;
the labels in the above figures are: 1. a steel belt; 2. an anchor cable; 3. a self-drilling anchor rod; 4. a U-shaped shed beam; 5. locking the leg anchor rod; 6. a self-drilling anchor rod; 7. an anchor cable; 8. slip casting type anchor rod.
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. 4, this combine and put working face coal roof lower integration tunnelling device includes lock leg stock 5, from boring formula stock 6, anchor rope 7, slip casting formula stock 8 and U type canopy roof beam 4, canopy roof beam one side of U type canopy roof beam 4 sets up lock leg stock 5, lock leg stock 5 injects in the lateral wall of coal mine tunnel, the tip of lock leg stock 5 is connected with one side of U type canopy roof beam 4, another side of canopy roof beam of U type canopy roof beam 4 sets up slip casting formula stock 8, slip casting formula stock 8 injects in the lateral wall of coal mine tunnel, the tip of slip casting formula stock 8 is connected with another side of U type canopy roof beam 4, the top of U type canopy roof beam 4 sets up many self boring formula stock 6, the vertical many anchor ropes 2 that set up in top of U type canopy roof beam 4, the one end of anchor rope 2 is fixed in the tunnel, the other end is fixed at the top of U type canopy roof beam 4, the top of U type canopy roof beam 4 is the flat ceiling.
As shown in fig. 2, a plurality of steel belts 1 are transversely arranged at the top of the self-drilling anchor rod 6, a plurality of anchor cables 2 are uniformly distributed on the steel belts 1, and the depth of the anchoring ends of the anchor cables 2 entering a stable rock stratum is not less than 1.5 m.
The integrated tunneling process for the coal roof of the fully mechanized caving face comprises the following steps:
as shown in fig. 1, the roadway level of the U-shaped shed beam 4 is lowered from the coal seam to the floor strata. According to the surrounding rock control principle of 'top-first-side-control' and through horizon adjustment, coal sides are changed into rock sides, the phenomenon that the soft coal walls frequently contact with the U-shaped shed beam 4 to form side wall caving is reduced, the stability of the roadway sides is improved, and deformation control of two sides of the U-shaped shed beam 4 is facilitated.
As shown in fig. 2, 3 and 4, the self-drilling anchor rod advance protection roof is adopted. And a self-drilling anchor rod 3 is arranged in advance in the top coal seam to serve as a metal framework, and the tunneling is carried out under the effective shielding of the metal framework. Each section of 3 models of self-drilling anchor rods is 2m, the self-drilling anchor rods are connected into a whole by special connectors, and the drill bit is made of alloy steel. The control length of the top plate of each cycle of the advanced metal framework is 4m, and the top plate is arranged at a distance of 0.4 m. The requirements are as follows:
(1) the advanced framework is designed to be tightly attached to the lower edge of the head-on shed beam, and is constructed by adopting a pneumatic drill or an anchor rod drilling machine (used when a coal roof is used) and a pneumatic hammer (used when a rock roof is used).
(2) The distance between the two adjacent self-drilling anchor rods 3 and the frameworks is 100-150 mm, all framework angles and directions are consistent, a plane is guaranteed to be formed, and the included angle between the plane and a roadway top plate is 3-5 degrees.
(3) After the framework construction is finished, the tail end of the framework is reinforced by the steel belt matched with the top plate anchor cable 2, and the included angle between the anchor cable 2 and the roadway top plate is 65-80 degrees.
(4) When the shed is erected forwards, the shed beam is tightly attached to the upper metal framework, after the construction is carried out to the stubble pressing position, the next cycle of metal framework construction is carried out again under the head-on shed beam, the shed is continuously tightly attached to the metal framework, the shed is erected by descending 150-200 mm, and the cycle is carried out sequentially.
(5) And (3) circularly advancing 6 sheds by constructing a group of advanced framework anchor rods every time, and performing secondary reinforcement by adopting steel belts to match the anchor rods between the 3 rd shed and the 4 th shed.
As shown in fig. 2, 3 and 4, an anchor cable 7 is adopted to actively support the top plate, the lagging head-on distance of a beam of the anchor cable 7 is not more than 20m, the anchor cable 7 is mainly in a phi 17.8/8000mm type, a plurality of 10m and 12m long anchor cables 7 are additionally processed for on-site standby, the depth of the anchoring end of the anchor cable 7 entering a stable rock stratum is not less than 1.5m, and the row distance between the anchor cables 7 is 1600mm × 1200mm (arranged in different centers).
Aiming at the difficult problems of soft coal seam, easy sheet leakage of a top plate and low pore-forming rate, a double-sleeve pore-forming technology is used. The method comprises the following steps:
(1) drilling an anchor cable hole: the anchor cable drilling machine is supported according to the plumb bob, so that the hole forming and slag discharging are facilitated; the drilling machine adopts double-pressure air, so that the serious hole collapse caused by water flow scouring is prevented, and the hole forming rate is improved.
(2) Installing an anchor cable by double sleeves: after punching is finished, stretching a phi 40mmPE pipe into a coal seam section to sleeve the wall and protect the hole, pushing the resin roll to the rock layer section to the bottom of the hole by using the phi 26mmPE pipe, installing an anchor rope 7 in the pipe, continuously pushing the resin roll to the bottom of the hole by using the anchor rope 7, stirring, then drawing out the wall protection sleeve and the guide pipe, and finishing installation of the anchor rope beam.
As shown in fig. 3 and 4, the hollow self-drilling anchor rod 6 is grouted to reinforce the top plate. The front framework hollow anchor rod is utilized to carry out grouting on the roof protection range, and if the roadway is excavated along the air, the side is reinforced by grouting along the air side of the roadway, so that the overall stability of the roadway is improved. And when the advanced metal framework is constructed, the advanced metal framework is well drilled and poured one by one, and the grouting work is also finished after the framework construction is finished. Grouting work of the top and the side part in the roadway is followed up in parallel at the back, and the lagging head-on is not more than 30 m.
As shown in fig. 4, the semicircular arch U-shaped steel canopy 4 is a flat ceiling. A composite supporting mode of 'flat-top U-shaped steel sheds + top plate anchor cable beams' is adopted, passive supporting and active supporting are combined, top beams are prevented from sinking and deforming possibly caused by the coming pressure of the top plates, and locking leg anchor rod supporting is added when the side pressure is large.
The process is innovatively applied to a drilling-down, anchoring, grouting and leveling integrated tunneling process and a drilling-down, anchoring, grouting and leveling integrated tunneling method, changes the traditional operation modes of manual tunneling, passive supporting and the like, optimizes the position of a roadway, changes a coal roadway into a half-rock or full-rock roadway, changes a small-cycle manual wedge-bumping roof-protecting operation into a large-cycle hollow self-drilling type anchor rod framework roof-protecting and grouting and reinforcing integrated operation, changes a semicircular arch U-shaped steel shed support into a flat roof and anchor rope beam composite support, and realizes integrated rapid construction of a main tunneling process, so that the tunneling efficiency under the coal roof is improved, the labor intensity is reduced, and the mining safety is improved.
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. Combine and put working face coal top integration tunnelling device down, its characterized in that: including the lock leg stock, from boring formula stock, anchor rope, slip casting formula stock and U type canopy roof beam, canopy roof beam one side of U type canopy roof beam sets up the lock leg stock, and in the lateral wall of lock leg stock injected coal mine tunnel, the tip of lock leg stock was connected with a side of U type canopy roof beam, and another side of canopy roof beam of U type canopy roof beam sets up the slip casting formula stock, and in the lateral wall of slip casting formula stock injected coal mine tunnel, the tip of slip casting formula stock was connected with the opposite side of U type canopy roof beam, the top of U type canopy roof beam sets up many from boring the formula stock, and the vertical many anchor ropes that set up in top of U type canopy roof beam, the one end of anchor rope is fixed in the tunnel, and the top at U type canopy roof beam is fixed to the other end.
2. The fully mechanized caving face coal roof lower integration tunneling device of claim 1, characterized in that: the top of the U-shaped shed beam is a flat ceiling.
3. The fully mechanized caving face coal roof lower integration tunneling device of claim 1, characterized in that: a plurality of steel belts are transversely arranged at the top of the self-drilling anchor rod, and a plurality of anchor cables are uniformly distributed on the steel belts.
4. The fully mechanized caving face coal roof lower integration tunneling device of claim 3, characterized in that: the depth of the anchor end of the anchor cable entering the stable rock stratum is not less than 1.5 m.
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| CN201920992348.1U CN210919066U (en) | 2019-06-28 | 2019-06-28 | Fully mechanized caving face coal top down integrated tunneling device |
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| CN201920992348.1U CN210919066U (en) | 2019-06-28 | 2019-06-28 | Fully mechanized caving face coal top down integrated tunneling device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130928A (en) * | 2019-06-28 | 2019-08-16 | 淮北矿业（集团）有限责任公司 | Integrated mole and technique under fully mechanized coal face coal top |
| CN114017079A (en) * | 2021-10-29 | 2022-02-08 | 国能神东煤炭集团有限责任公司 | Roadway supporting device for gob-side entry driving under coal mine |
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2019
- 2019-06-28 CN CN201920992348.1U patent/CN210919066U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130928A (en) * | 2019-06-28 | 2019-08-16 | 淮北矿业（集团）有限责任公司 | Integrated mole and technique under fully mechanized coal face coal top |
| CN114017079A (en) * | 2021-10-29 | 2022-02-08 | 国能神东煤炭集团有限责任公司 | Roadway supporting device for gob-side entry driving under coal mine |
| CN114017079B (en) * | 2021-10-29 | 2023-10-13 | 国能神东煤炭集团有限责任公司 | Roadway support device for underground gob-side entry driving of coal mine |
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