CN210317359U - False roof structure for old lane - Google Patents
False roof structure for old lane Download PDFInfo
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- CN210317359U CN210317359U CN201921278749.7U CN201921278749U CN210317359U CN 210317359 U CN210317359 U CN 210317359U CN 201921278749 U CN201921278749 U CN 201921278749U CN 210317359 U CN210317359 U CN 210317359U
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Abstract
The utility model relates to a coal mining field discloses a cross false top structure in old lane. The false roof structure comprises anchor cables, strip-shaped connecting pieces and a wood buttress, wherein the upper portion of each anchor cable is anchored into the top of an old roadway, the lower portion of each anchor cable extends to a stope face, the anchor cables are arranged in multiple rows, each row of anchor cables are correspondingly provided with the strip-shaped connecting pieces and are connected together through the strip-shaped connecting pieces, the strip-shaped connecting pieces and the rows of anchor cables form an anchor net structure, the wood buttress, the strip-shaped connecting pieces and the anchor cables are connected into an integral structure, and the bottom of the wood buttress and the upper portion of the stope. The utility model discloses utilize anchor rope cooperation rail as the basement, connect the top through semicircle wooden trestle crib above that, lay into whole false top, prevented that the wall caving range further enlarges during the old lane, the upper portion top coal of the crib and the contact of support back timber that erect simultaneously is at same horizontal plane, ensures the steady transition of support, and the working face has realized continuous safe high-efficient exploitation, reduces the working face by a wide margin and moves the face time of falling, has improved the resource recovery rate.
Description
Technical Field
The utility model belongs to the technical field of the coal mining and specifically relates to a cross false top structure in old lane.
Background
In coal mining, because the working face has more old lanes in the stoping range, the old lanes are frequently encountered during the mining of the large-inclination fully-mechanized mining working face, and in the process of passing the old lanes, rib spalling and caving are easy to occur, so that the safety problem is caused, and the normal process of stoping is influenced.
Taking a 3215-241 working face of a coal mine as an example, the 3215-241 working face is located in a mining area at the level of +700m of the mine, and the mining elevation is +1167 m- +1180 m; the strike length is 280 m-360 m, the average length is 300m, the inclination length is 77 m-114 m, the average length is 102m, the inclination angle of the coal seam is 27-67 degrees, and the average angle is 39 degrees; the average thickness of the coal seam is 5.24m, and the reserve capacity of the working face is 20.8 ten thousand tons. The coal seam is soft and easy to break and fall; when the working face passes through B11 anticline during stoping, because the pressure of anticline and syncline shaft parts is concentrated, roof cracks are relatively developed, and the condition that the gas content is relatively large has great influence on stoping, which is shown in a working face roadway layout diagram of figure 1.
At the position of the return airway 100m away from the 3021S stone gate, the distance between the old lane (+900m horizontal north wing transportation main lane) and the level of the return airway is 7.2 m; the shortest distance between the old lane and the top beam of the working face support is 3.3m, the vertical distance between the old lane and the bottom plate is 5.8m, and the mining height of the working face is less than or equal to 2.5 m; the shortest distance between the old roadway and the top beam of the support on the working face is 5.5m away from the return airway, the influence range of the old roadway is 9.1m, the old roadway is positioned in the range of 3-10 downward frames of the return airway, and the detail is shown in the position section of the roadway on the working face of FIG. 2.
A positive fault f2415-1 penetrates through the whole working surface on the 3215-241 working surface, the fault is prone to 297 degrees, the inclination angle is ∠ degrees, the fall H is 1.2m, the positive fault is positioned 8m before the point A9# of the return airway and 5m before the point A31# of the transportation lane, the strike length is 18-21 m, and the mining has great influence on the mining.
TABLE 1 geological Structure Condition Table
Regarding the 3215-grade 241 working face, the top plate direction of the 3215-grade 241 working face is a +900m horizontal north-wing transportation main lane (+900m horizontal north-two loading line port to +900m horizontal north-wing transportation main lane gate 6#, old lane), the section of transportation main lane locally exposes 15-2 and 4# coal seams, the old lane bottom plate is the middle of the coal seam, and a traditional old lane passing mode is adopted, so that a green-leaf roof leakage accident is easily caused when the 3215-grade 241 working face passes through the old lane.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a cross old lane false top structure is provided, improve and combine the security that adopts the working face and cross the old lane.
The utility model discloses a cross false top structure in old lane, including anchor rope, bar connecting piece and buttress, the top in old lane is gone into in anchor rope upper portion anchor, and the lower part extends to the working face top of stoping, the anchor rope is the multirow and arranges, and each row of anchor rope corresponds respectively and is provided with the bar connecting piece and links together through the bar connecting piece, bar connecting piece and each row of anchor rope constitute anchor net structure, the buttress erects on the anchor net structure, buttress, bar connecting piece and anchor rope interconnect are overall structure, the bottom of buttress and the upper portion top coal of working face are at same horizontal plane.
Preferably, the strip-shaped connecting piece is a waste rail.
Preferably, the strip-shaped connecting piece is provided with an anchor eye corresponding to the anchor cable, and the bottom of the anchor cable penetrates through the anchor eye and is provided with a lock for fixing the strip-shaped connecting piece.
Preferably, the wood pile comprises semicircular wood, the semicircular wood is erected into a structural unit shaped like a Chinese character 'jing', and the semicircular wood of adjacent structural units shaped like a Chinese character 'jing' are mutually crossed and connected.
Preferably, two ends of the structure shaped like a Chinese character jing are respectively erected on two adjacent strip-shaped connecting pieces.
Preferably, four corners of the semicircular wood are fixed through fixing parts respectively, and the semicircular wood is wedged tightly through wood wedges.
Preferably, the fixing piece is a claw block or an iron wire.
Preferably, the diameter of the semicircular wood is at least 16cm, and the length of the semicircular wood is 2-3 m.
Preferably, the number of rows of the anchor cables is 2-5, and the diameter of the anchor cables is 15-20 mm.
Preferably, in the same row of anchor cables, the distance between adjacent anchor cables is 1.4-1.6 m; the distance between adjacent rows of the anchor cables is 1.1-1.3 m.
The utility model has the advantages that: the utility model discloses utilize anchor rope cooperation rail as the basement, connect the top through semicircle wooden trestle crib above that, lay into whole false top, prevented that the wall caving range further enlarges during the old lane, the upper portion top coal of the crib and the contact of support back timber that erect simultaneously is at same horizontal plane, ensures the steady transition of support, and the working face has realized continuous safe high-efficient exploitation, reduces the working face by a wide margin and moves the face time of falling, has improved the resource recovery rate.
Drawings
FIG. 1 is a layout diagram of a false roof structure of the present invention;
FIG. 2 is a cross-sectional view A-A' of FIG. 1;
fig. 3 is a sectional view of B-B' in fig. 1.
Reference numerals: anchor rope 1, rail 2, semicircle wood 3, tool to lock 4.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The utility model discloses a cross false top structure in old lane, including anchor rope 1, bar connecting piece and buttress, the top in old lane is gone into to 1 upper portion anchor of anchor rope, and the lower part extends to the working face top of stoping, anchor rope 1 is the multirow and arranges, and each row of anchor rope 1 corresponds respectively and is provided with the bar connecting piece and links together through the bar connecting piece, bar connecting piece and each row of anchor rope 1 constitute anchor net structure, the buttress erects on the anchor net structure, 1 interconnect of buttress, bar connecting piece and anchor rope is overall structure, the bottom of buttress and the upper portion top coal of working face are at same horizontal plane.
Taking the 3215-241 working face in the background art as an example, the working face passes through the old roadway, and before the working face reveals the old roadway, the supporting and gas conditions of the roadway are checked; when the concentration of the gas in the tunnel is high or exceeds the limit, the gas in the tunnel must be timely treated to enhance the ventilation work of the old tunnel. As shown in figure 1, a +900m north wing transportation main lane (namely an old lane) is arranged above a 3215-241 working face, before the working face reveals the old lane, 3 rows of anchor cables 1 are arranged in the +900m north wing transportation main lane for locking and strip-shaped connecting pieces are erected, half-round wood 3 with the diameter of more than or equal to 16cm and the length of 2-3m is used for abutting on an anchor net, and an integral false roof is laid, so that the roof leakage range of the wall caving is prevented from being further expanded during the process of passing the old lane. After the arrangement of the false roof structure is finished, normal stoping and propelling can be realized, and the bottom of the wood pile and the top coal on the upper part of the working face are in the same horizontal plane, so that the stable transition of the support in the stoping process is ensured.
The strip-shaped connecting piece can adopt the existing structural members such as section steel, the waste rail 2 of 15kg/m is adopted in the embodiment, the strength of the waste rail 2 is enough, and the original rail in the waste roadway can be directly used. The connection of bar connecting piece and anchor rope 1 can adopt modes such as bolted connection, iron wire ligature, like the embodiment shown in fig. 3, the bar connecting piece has seted up the anchor rope eye corresponding anchor rope 1 position, and the anchor rope eye is passed and be provided with tool to lock 4 fixed bar connecting piece to the bottom of anchor rope 1. The lockset 4 can adopt the lockset 4 matched with the anchor cable 1, and the connection is realized in the mode, so that the connection strength is high, and the operation is very convenient.
The wood crib is generally built up by adopting a wood structure, and in terms of a particularly preferred structure, as shown in an embodiment shown in fig. 2, the wood crib comprises semicircular wood 3, the semicircular wood 3 is built into a structural unit in a shape of a Chinese character 'jing', and the semicircular wood 3 of adjacent structural units in the shape of the Chinese character 'jing' are mutually crossed and connected. The 'well' -shaped structural units can ensure the strength in longitudinal and transverse directions, and the semicircular wood 3 of each 'well' -shaped structural unit are mutually crossed and connected to connect each 'well' -shaped structural unit into a stable network system, so that the integrity and the stability of the 'well' -shaped structural unit are improved. The both ends of "well" style of calligraphy structure are set up respectively on two adjacent bar connection spare best, and consequently, the length of semicircle wood 3 needs to be greater than the interval of bar connection spare, in order to further improve the stability of wood buttress, the four corners of semicircle wood 3 is fixed through the mounting respectively, it is tight through being provided with the wooden wedge and passing through the wooden wedge between the semicircle wood 3. The fixing piece can adopt a common connecting component such as a claw T or an iron wire.
The row number of the anchor cables 1 is determined according to actual conditions, the same length is 2-5 rows, the diameter of each anchor cable 1 is 15-20 mm, and the distance between every two adjacent anchor cables 1 in the same row of anchor cables 1 is 1.4-1.6 m; the distance between adjacent rows of the anchor cables 1 is 1.1-1.3 m, namely the distance between adjacent strip-shaped connecting pieces is 1.1-1.3 m. In the embodiment shown in fig. 1 to 3, the diameter of the anchor cable 1 is phi 17.8mm, the distance D1 between adjacent anchor cables 1 in the same row is 1.5m, and the distance D2 between the strip-shaped connecting pieces is 1.2 m.
Claims (10)
1. Cross old lane false top structure, its characterized in that: including anchor rope (1), bar connecting piece and wood buttress, the top in old lane is gone into in anchor rope (1) upper portion anchor, and the lower part extends to the working face top of stoping, anchor rope (1) are the multirow and arranges, and each row of anchor rope (1) corresponds respectively and is provided with the bar connecting piece and links together through the bar connecting piece, bar connecting piece and each row of anchor rope (1) constitute anchor net structure, the wood buttress erects on the anchor net structure, wood buttress, bar connecting piece and anchor rope (1) interconnect are overall structure, the bottom of wood buttress and the upper portion top coal of working face are at same horizontal plane.
2. A passing roadway false roof structure as claimed in claim 1, wherein the strip-shaped connecting piece is a used rail (2).
3. The old-lane false roof structure as claimed in claim 1 or 2, wherein the strip-shaped connecting piece is provided with an anchor eye corresponding to the anchor cable (1), the bottom of the anchor cable (1) passes through the anchor eye and is provided with a lock (4) for fixing the strip-shaped connecting piece.
4. A false roof structure in a used lane according to claim 1, wherein the wood pile comprises semicircular wood (3), the semicircular wood (3) is arranged into structural units in a shape like a Chinese character 'jing', and the semicircular wood (3) of adjacent structural units in the shape like the Chinese character 'jing' are connected with each other in a crossing way.
5. A false roof structure for a passing old lane according to claim 4, wherein two ends of the # -shaped structure are respectively overlapped on two adjacent strip-shaped connecting pieces.
6. The old drift false roof structure of claim 4, wherein four corners of the half-round timbers (3) are respectively fixed through fixing parts, and wood wedges are arranged between the half-round timbers (3) and are wedged tightly through the wood wedges.
7. The passing roadway false roof structure of claim 6, wherein the fixing piece is a claw T or a steel wire.
8. A false roof structure in a used lane according to claim 4, wherein the semi-circular wood (3) has a diameter of at least 16cm and a length of 2-3 m.
9. The old lane false roof structure as claimed in claim 1, wherein the number of rows of the anchor cables (1) is 2-5, and the diameter of the anchor cables (1) is 15-20 mm.
10. The old lane false roof structure as claimed in claim 1 or 4, wherein in the same row of anchor cables (1), the distance between adjacent anchor cables (1) is 1.4-1.6 m; the distance between adjacent rows of the anchor cables (1) is 1.1-1.3 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921278749.7U CN210317359U (en) | 2019-08-08 | 2019-08-08 | False roof structure for old lane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921278749.7U CN210317359U (en) | 2019-08-08 | 2019-08-08 | False roof structure for old lane |
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| CN210317359U true CN210317359U (en) | 2020-04-14 |
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| CN201921278749.7U Active CN210317359U (en) | 2019-08-08 | 2019-08-08 | False roof structure for old lane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431283A (en) * | 2020-11-27 | 2021-03-02 | 兖州煤业股份有限公司 | Ditch cover plate for supporting underground transportation of trackless rubber-tyred vehicle |
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2019
- 2019-08-08 CN CN201921278749.7U patent/CN210317359U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431283A (en) * | 2020-11-27 | 2021-03-02 | 兖州煤业股份有限公司 | Ditch cover plate for supporting underground transportation of trackless rubber-tyred vehicle |
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