CN218780367U - Cut-and-go-up mountain anti-rib construction structure - Google Patents

Abstract

The utility model relates to a cut construction field of going up a hill of colliery discloses a cut construction structure of preventing rib stripping that goes up a hill. The utility model discloses a cut up mountain-climbing and prevent rib construction structures includes taut piece, tool to lock and baffle, taut piece upper end is connected in moraine head coal wall, taut piece lower extreme is connected with the baffle through the tool to lock, the baffle is attached in moraine head coal wall and is taut through taut piece, the baffle is to the upper portion skew of cutting the hole to have the construction space that is used for the construction of going up a mountain between the bottom plate in baffle and coal seam. The cut-up mountain caving prevention rib construction structure utilizes the tensioning piece to match the baffle, can effectively prevent rib caving of the moraine head coal wall, can also play the role of a waste rock blocking plate, and effectively improves the construction safety.

Description

Cut-and-go-up mountain anti-rib construction structure

Technical Field

The utility model belongs to the technical field of the construction of cutting going up a hill in colliery and specifically relates to a cut construction structures of preventing rib stripping that goes up a hill.

Background

Except for the conventional construction mode of direct tunneling from bottom to top, the current advanced construction scheme of cutting and climbing is a drilling machine construction method, and the specific implementation method is as follows:

1. after the construction of the transportation lane is in place, a ZYWL-4000 type mining crawler-type full hydraulic drilling machine (1 # drilling machine for short) is arranged at the designed position of cutting and ascending the mountain.

2. And (3) drilling holes at the position of the transportation lane corresponding to the cut-up center of the upper mountain along the true inclination direction of the No. 11 coal seam to the return airway to construct a bedding hole with the diameter of 113 mm.

3. And (3) suspending drilling construction after the drill hole penetrates through the return airway, and installing a CMS1-4000 type coal mine deep hole drilling rig (called a 2# drilling rig for short) at the corresponding penetration point position of the return airway.

4. After the 2# drilling machine is installed, a drill bit of the 1# drilling machine is taken down, a drill rod with the diameter of 89mm and the diameter of 73mm is connected to the drill rod, then the 2# drilling machine is additionally connected with a drill rod with the diameter of 1.5m, the drill rod of the 2# drilling machine and the drill rod of the 1# drilling machine are connected into a whole, the drill rods are retreated downwards from the air return roadway to the transportation roadway, each rod of the 1# drilling machine is retreated, the 2# drilling machine is tightly connected with the drill rod of the 1# drilling machine, and the drill rod of the 2# drilling machine penetrates into the transportation roadway.

5. After the drill rod of the 2# drilling machine penetrates through the transportation roadway, a hole expanding drill bit with the diameter of 350mm is arranged, the front end of the drill bit is connected with the drill rod of the 2# drilling machine, and then the 1# drilling machine is started to upwards expand the hole for the first time. When the No. 1 drilling machine expands one drill rod upwards, the No. 2 drilling machine needs to withdraw one drill rod.

6. And after the hole is expanded to the air return way, the operator of the 2# drilling machine takes off the expanding drill bit, then the operator of the 2# drilling machine puts the drill bit with the diameter of 500mm on the drill bit and connects the drill bit to the drill rod of the 1# drilling machine, and after the connection is confirmed, the 1# drilling machine is started to expand the hole for the second time from top to bottom. When the 1# drilling machine retreats one drill rod, the 2# drilling machine is additionally connected with one drill rod.

7. After the drilled hole is expanded to a transportation lane, the expanding bit is taken down, the drill rod of the 1# drilling machine is connected with the drill rod of the 2# drilling machine by using the variable head, then the drill rod of the 1# drilling machine is pushed upwards, each drill rod of the 1# drilling machine is pushed into one rod, the next rod of the 2# drilling machine is pushed into one rod, after the drill rod of the 1# drilling machine is pushed to the air return lane, the variable head is removed, then the expanding bit with the diameter of 650mm is arranged on the drill rod of the 1# drilling machine, then the expanding bit is connected with the drill rod of the 2# drilling machine, and after the connection is confirmed, the 1# drilling machine is started to expand the hole for the third time from top to bottom.

8. And after the drilled hole is expanded to be 650mm in diameter, installing a sleeve from top to bottom by using a 2# drilling machine until the sleeve is lowered to a transportation roadway, and taking the sleeve as a lower cargo hole during the later-stage hole cutting and expanding.

The method has the advantages that personnel do not need to enter the mountain climbing operation in the cutting and mountain climbing construction process, and the safety risk in the mountain climbing construction process is greatly reduced. However, the process is suitable for medium-thickness coal seams with harder coal seams, and the situation of roof and bottom plate penetration is easy to occur in the actual construction process if a softer thin coal seam is encountered; when the coal seam is thin, the possibility that the top bottom plate is penetrated and the position deviates from the design center of the upper mountain in the drilling construction process is extremely high. Therefore, the method is not suitable for the coal bed with thin thickness and softer coal bed.

Taking a certain coal seam as an example, the structure is simpler, the coal seam is more stable, the total thickness of the return airway coal seam is 0.97-2.4m, the average thickness is 1.45m, the utilization thickness of the coal seam is 0.8-1.9m, the average thickness is 1.26m, 1-2 layers of gangue are contained, the thickness of the gangue is 0.05-0.5m, the average thickness is 0.20m, and the lithology is carbon mudstone; the total thickness of the coal seams of the transportation lane is 0.96-1.8m, the average thickness is 1.43m, the utilization thickness of the coal seams is 0.7-1.65m, the average thickness is 1.28m, 1-2 layers of sandwiched gangue are contained, the thickness of the sandwiched gangue is 0.08-0.3m, the average thickness is 0.15m, and the lithology is carbon mudstone. According to the site construction condition of the tunnel, the coal seam of the return airway is soft, the upper wall of the tunnel is easy to be broken in the construction process, and the coal seam of the transportation airway is more stable than that of the return airway. The position of the softer part of the coal seam and the position of the easy caving is about 0.4-0.5m below the top plate. The coal seam has the following difficulties in the cutting and mountain climbing process:

1. the coal seam is soft and easy to caving, and the management difficulty of the moraine head coal wall is large. The coal seam structure is simple, but the coal seam is soft, and the area of the coal seam with the top plate 0.4-0.5m below the top plate is easy to be caving, so that the moraine head coal wall management difficulty in the mountain climbing construction process is large.

2. The inclination angle of the ascending mountain is large, and the management difficulty of preventing flying and stopping the gangue is large. According to the current roadway reality, the cutting and the climbing are predicted to be 57 degrees, the true inclination length is 104m, the mine does not have related construction experience at present, the construction flying prevention and waste rock blocking management difficulty is extremely high, and the coal seam is easy to break, so that the safety risk in the climbing construction process is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a cut upper hill prevents rib spalling construction structures is provided, can effectively solve the upper hill in the work progress coal wall prevents rib spalling problem.

The utility model discloses a cut up mountain-climbing and prevent rib construction structures includes taut piece, tool to lock and baffle, taut piece upper end is connected in moraine head coal wall, taut piece lower extreme is connected with the baffle through the tool to lock, the baffle is attached in moraine head coal wall and is taut through taut piece, the baffle is to the upper portion skew of cutting the hole to have the construction space that is used for the construction of going up a mountain between the bottom plate in baffle and coal seam.

Preferably, a central drilling hole is formed in the center of the cutting hole along the length direction, and the tensioning piece is arranged in the central drilling hole.

Preferably, a fixing piece is arranged on the roadway top plate above the cutting hole, and the upper end of the tensioning piece penetrates through the central drilling hole to be connected with the fixing piece.

Preferably, the tensioning member comprises two anchoring members anchored to the moraine head coal wall, and the two anchoring members are arranged in a splayed manner with the upper ends separated and the lower ends closed.

Preferably, the anchor is anchored into the roof or floor of the corresponding coal seam.

Preferably, the baffle is an iron plate.

Preferably, the tensioning member comprises an anchoring member anchored to the moraine wall, the anchoring member being located in the center of the incision and connected to the center of the baffle.

Preferably, the baffle comprises a connecting rod and a backing plate, the connecting rod is transversely arranged, the tensioning piece is connected with the connecting rod, and the backing plate is arranged between the connecting rod and the tilter coal wall.

Preferably, the baffle has an abdicating gap with the top plate and both sides of the incision.

Preferably, the width of the construction gap is 0.4-0.6 m, and the width of the abdicating gap is 0.05-0.15 m.

The utility model has the advantages that: the cut-up mountain caving prevention rib construction structure utilizes the tensioning piece to match the baffle, can effectively prevent rib caving of the moraine head coal wall, can also play the role of a waste rock blocking plate, and effectively improves the construction safety.

Drawings

FIG. 1 is a schematic view of a first embodiment of the present invention;

FIG. 2 is a cross-sectional view B-B' of FIG. 1;

FIG. 3 isbase:Sub>A cross-sectional view A-A' of FIG. 1;

FIG. 4 is a schematic view of a second embodiment of the present invention;

FIG. 5 isbase:Sub>A cross-sectional view A-A' of FIG. 4;

fig. 6 is a schematic view of a third embodiment of the present invention;

fig. 7 isbase:Sub>A cross-sectional view ofbase:Sub>A-base:Sub>A' in fig. 6.

Reference numerals: a cutting hole 1, a bottom plate 11, a top plate 12, a tensioning piece 2, a baffle 3, a connecting rod 31, a backing plate 32, a clamping groove 33, a lock 4, a fixing piece 5, an anchoring connecting piece 6,

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses a cut up mountain-climbing and prevent caving construction structure, including taut 2, tool to lock 4 and baffle 3, 2 upper ends of taut are connected in moraine head coal wall, 2 lower extremes of taut are connected with baffle 3 through tool to lock 4, baffle 3 is attached in moraine head coal wall and is taut through taut 2, baffle 3 squints to the upper portion of eager eye 1 to have the construction space that is used for the construction of going up the mountain between baffle 3 and the bottom plate 11 in coal seam.

When the cut-and-raised rib caving prevention construction structure is used for construction, the baffle 3 is tensioned through the tensioning piece 2, so that the baffle 3 is tightly attached to the moraine coal wall, rib caving of the coal wall in the construction process can be prevented, the baffle 3 is located at a position close to the upper portion of the cut hole 1, conventional construction of the cut hole 1 can be conducted through a construction gap at the lower portion, the baffle 3 serves as a waste rock blocking plate in the construction process at the moment, and construction safety is improved. Along with the upward progress of construction, the position of the baffle 3 also needs to move along with the moraine head coal wall, so that the tensioning piece 2 needs to be tightened along with the position, the baffle 3 is moved in time, and the functions of preventing caving and blocking gangue are guaranteed to be exerted.

The tensioning piece 2 can be an anchor cable, an anchor rod, an inhaul cable and other existing tools, and the lockset 4 can be matched with the connecting pieces of the tools, such as the anchor cable matched with a tray and a bolt. The baffle 3 can be made of wood or iron plate. The following provides 3 preferred embodiments.

In one embodiment of the present application, as shown in fig. 1 to 3, the center of the incision 1 is provided with a central bore along the length direction, and the tension member 2 is disposed in the central bore. The following construction method can be specifically adopted:

1. after the construction of the transportation lane is in place, a ZYWL-4000 type mining crawler-type full hydraulic drilling machine is arranged at the designed position of cutting and ascending the mountain.

2. And (4) drilling holes at the position of the transportation lane corresponding to the cut-up center of the upper mountain to construct 75mm or 113mm diameter bedding holes towards the return airway along the true inclination direction of the coal seam.

3. And after the drill hole penetrates through the return airway, suspending the drilling construction, connecting a steel strand with the drill bit at a corresponding penetration point of the return airway, and then starting the drilling machine to move downwards until the drill rod moves back completely.

4. And (3) taking the anchor cable as a tensioning piece 2, and fixing the upper end of the anchor cable at a return airway corresponding to the through hole of the drilled hole.

5. A baffle 3 is inserted into the lower end of the anchor cable, and the baffle 3 is fixed by a lock 4 and an anchor cable tray and is adhered to the wall of the moraine head coal.

6. In the construction process of going up a mountain, the baffle 3 is moved in time by lifting the anchor cable along with the upward propulsion.

The operation mode is simple and convenient, the problem of rib spalling prevention of the coal wall in the construction process of climbing can be effectively solved, certain experience can be accumulated in the construction of the steep inclined coal seam climbing in the later period of a mine, but the cut coal seam of the climbing is softer and the thickness of the coal seam is about 1.4m, and the probability that the top bottom plate 11 penetrates and the position deviates from the designed center position of the climbing in the drilling construction process is very high because the cut coal seam of the climbing is similar to a drilling machine construction method in the background technology.

In consideration of the stability of the anchor cable fixing, in the preferred embodiment of the present application, a fixing member 5 is provided on the roadway roof 12 above the cutting hole 1, and the upper end of the tension member 2 is connected with the fixing member 5 through the central bore hole. The fixing piece 5 can be made of section steel such as I-steel and is fixed on a roadway top plate 12 above the cutting hole 1 through an anchor connecting piece 6 such as an anchor rod or an anchor cable, and the roadway above the cutting hole 1 is usually a return airway. The tensioning piece 2 preferably adopts a guy cable, and the baffle 3 can be timely moved in a mode of tightly clamping the baffle 3 and shearing the anchor cable.

In a second embodiment of the application, as shown in figures 4-5, the tension member 2 comprises two anchoring members anchored to the wall of the tillite, the two anchoring members being arranged in a splayed configuration with the upper ends separated and the lower ends brought together. The construction method comprises the following steps:

1. before going up to the mountain, firstly two splayed anchoring pieces are arranged on two sides of the center of the cutting hole 1 along the coal bed inclination direction, a baffle plate 3 with a clamping groove 33 is fixed in the advancing direction of the anchoring pieces through a lock 4 and is adhered to the moraine top coal wall, and during the going up to the mountain construction, the baffle plate 3 is fastened while the construction is carried out.

2. In order to ensure the gangue blocking effect of the anchor cable and the iron plate on the moraine head coal wall, a group of splayed anchoring pieces are arranged for fixing the iron plate in each construction period of 3-5m according to the using effect of the iron plate clamping groove 33 during construction.

The method is more convenient to operate, and the problem of rib spalling prevention of the coal wall in the mountain climbing construction process can be effectively solved. In order to ensure the stability of the anchoring elements, in the preferred embodiment of the present application, the anchoring elements are anchored into the respective coal seam roof 12 or floor 11.

In a third embodiment of the present application, as shown in fig. 6-7, the tensioning member 2 comprises an anchoring member anchored to the moraine coal wall, which is located in the center of the cutout 1 and connected to the center of the baffle plate 3. This scheme is similar to the previous scheme three, changing 2 anchors to 1.

Since only 1 anchor is used, in order to ensure stability, the baffle 3 includes a connecting rod 31 and a backing plate 32, the connecting rod 31 is transversely disposed, the tension member 2 is connected with the connecting rod 31, and the backing plate 32 is arranged between the connecting rod 31 and the moraine head coal wall. The backing plate 32 is typically a wooden plate, which has a non-slip effect and can be attached to the coal wall with only 1 anchor. And baffle 3 in two kinds of preceding schemes need not to adopt the mode of connecting rod 31 cooperation backing plate 32, directly adopt iron plate can, it is more convenient to be under construction. In the second scheme, the splayed anchoring part is adopted, and in order to ensure that the connecting position of the anchoring part and the baffle plate 3 is accurate, a clamping groove 33 can be arranged on the baffle plate 3, so that the position of the anchoring part can be adjusted, and the splayed anchoring part is better matched with the position of the splayed anchoring part. Similarly, in the third embodiment, due to the arrangement of the backing plates 32, in order to ensure that the gap between the backing plates 32 corresponds to the joint of the anchor and the connecting rod 31, a clamping groove 33 may be formed on the connecting rod 31, so that the connecting position of the anchor may be adjusted. The connecting rod 31 can be made of channel steel and other profiles.

The gap between the baffle 3 and the floor 11 of the coal seam is maintained for construction, and the gap width is not too large or too small, usually 0.4-0.6 m, preferably 0.5 m. The baffle 3 can move along with the moraine head coal wall, and in order to facilitate the movement of the moraine head coal wall, yielding gaps are formed between the baffle 3 and the top plate 12 and the two sides of the notch 1, the width of the yielding gaps is 0.05-0.15 m, and 0.1m is preferred.

Claims (10)

1. The cut-up caving rib prevention construction structure is characterized by comprising a tensioning piece (2), a lock (4) and a baffle (3), wherein the upper end of the tensioning piece (2) is connected into the moraine head coal wall, the lower end of the tensioning piece (2) is connected with the baffle (3) through the lock (4), the baffle (3) is attached to the moraine head coal wall and is tensioned through the tensioning piece (2), the baffle (3) deviates to the upper part of the cut-out hole (1), and a construction gap for ascending construction is formed between the baffle (3) and a bottom plate (11) of a coal bed.

2. The cut-and-raise slope-caving prevention construction structure as claimed in claim 1, wherein: the center of the cutting hole (1) is provided with a central drilling hole along the length direction, and the tensioning piece (2) is arranged in the central drilling hole.

3. The cut-and-raise slope-caving prevention construction structure as claimed in claim 2, wherein: the fixing piece (5) is arranged on the roadway top plate (12) above the hole cutting (1), and the upper end of the tensioning piece (2) penetrates through the central drilling hole to be connected with the fixing piece (5).

4. The cut-and-raise slope-caving prevention construction structure as claimed in claim 1, wherein: the tensioning piece (2) comprises two anchoring pieces anchored into the moraine head coal wall, and the two anchoring pieces are arranged in a splayed mode that the upper ends of the two anchoring pieces are separated and the lower ends of the two anchoring pieces are close to each other.

5. The cut-and-raise slope-caving prevention construction structure as claimed in claim 4, wherein: the anchoring elements are anchored into the corresponding roadway roof (12) or floor (11).

6. The cut-to-rise slope-caving prevention construction structure as claimed in any one of claims 2 to 4, wherein: the baffle (3) is an iron plate.

7. The cut-and-raise slope-caving prevention construction structure as claimed in claim 1, wherein: the tensioning piece (2) comprises an anchoring piece anchored into the moraine head coal wall, and the anchoring piece is positioned in the center of the incision (1) and connected to the center of the baffle plate (3).

8. The cut-and-raise slope-caving prevention construction structure as claimed in claim 7, wherein: the baffle (3) comprises a connecting rod (31) and a backing plate (32), the connecting rod (31) is transversely arranged, the tensioning piece (2) is connected with the connecting rod (31), and the backing plate (32) is arranged between the connecting rod (31) and the moraine head coal wall.

9. The cut-and-raise slope-caving prevention construction structure as claimed in claim 1, wherein: yielding gaps are arranged between the baffle (3) and the top plate (12) and the two sides of the cutting hole (1).

10. The cut-and-raise slope-caving prevention construction structure as claimed in claim 9, wherein: the width of the construction gap is 0.4-0.6 m, and the width of the abdication gap is 0.05-0.15 m.

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