CN206753658U - A kind of back unstability grading forewarning system device - Google Patents
A kind of back unstability grading forewarning system device Download PDFInfo
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- CN206753658U CN206753658U CN201720534337.XU CN201720534337U CN206753658U CN 206753658 U CN206753658 U CN 206753658U CN 201720534337 U CN201720534337 U CN 201720534337U CN 206753658 U CN206753658 U CN 206753658U
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- steel wire
- anchor cable
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- displacement sensor
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 239000011435 rock Substances 0.000 claims abstract description 14
- 238000004873 anchoring Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 abstract description 9
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 8
- 238000000926 separation method Methods 0.000 description 4
- 230000008093 supporting effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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Abstract
A kind of back unstability grading forewarning system device, belongs to back support technology field.The back unstability grading forewarning system device includes steel wire, hollow anchor cable, displacement transducer and prior-warning device；In hollow anchor cable insertion rock stratum and it is anchored on back, steel wire is located in the hollow structure of hollow anchor cable, and one end of steel wire is located at one end in rock stratum with hollow anchor cable and fixed, the other end stretches out from the anchored end of hollow anchor cable, the external part of steel wire is connected with displacement transducer, and displacement transducer is connected with prior-warning device.The back unstability grading forewarning system device can in time back tunnel roof deformation when residing period, corresponding Prevention method is made to the potential problem being likely to occur, and the device can be completed to install during to roadway support, it is additionally carried out drilling and installs without using rig, has saved substantial amounts of time and cost.
Description
Technical Field
The utility model relates to a tunnel roof struts technical field, in particular to tunnel roof unstability grading early warning device.
Background
Early warning tunnel roof sinks, can accurately obtain the absciss layer information of tunnel roof, discover unsafe hidden dangers such as the sign of tunnel roof unstability as soon as possible, and then can take the restoration and reinforcement measure, avoid the emergence of roof fall accident for the colliery carries out safety in production smoothly.
Adopt roof separation appearance and stock dynamometer to measure the unstability situation of tunnel roof at present, at the in-process of installation roof separation appearance and stock dynamometer, need use the rig to drill in the tunnel, and just a roof separation appearance need be installed at a section distance of every in the tunnel, consequently need additionally to drill the more hole of quantity in the tunnel and install the roof separation appearance specially, and the degree of depth in hole is darker, need spend longer time among the drilling process, use the rig to drill hole also makes the installation cost higher.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a graded early warning device for tunnel roof instability, which comprises a steel wire, a hollow anchor cable, a displacement sensor and an early warning device;
the hollow anchor rope is inserted into a rock stratum and anchored on a roadway top plate, the steel wire is located in a hollow structure of the hollow anchor rope, one end of the steel wire and one end, located in the rock stratum, of the hollow anchor rope are fixed, the other end of the steel wire extends out of an anchoring end of the hollow anchor rope, the extending end of the steel wire is connected with a displacement sensor, and the displacement sensor is connected with the early warning device.
The tunnel roof instability grading early warning device further comprises an anchor cable tray and a nut, the anchor cable tray is installed at the anchoring end of the hollow anchor cable and tightly attached to the tunnel roof, and the nut compresses the anchor cable tray.
The displacement sensor is a stay wire displacement sensor, and a stay rope of the stay wire displacement sensor is tied to the extending end of the steel wire.
The early warning device is a diode multi-color signal lamp.
Two thresholds are set in the displacement sensor, namely an early warning period threshold T1 and a high risk period threshold T2,
the early warning period threshold value T1 is 0.7L, and the high risk period threshold value T2 is 0.8L, wherein L is the maximum extension length of the hollow anchor cable.
The utility model provides a tunnel roof unstability stage early warning device can in time feed back the tunnel roof and warp the time of locating, carries out quantitative grading with the unstability situation of tunnel roof, and corresponding prevention measure is made to the hidden danger problem that probably appears to the timely monitoring of tunnel roof to more accurate realization, and the device can accomplish the installation at the in-process of strutting the tunnel, need not to use the rig to drill in addition and install, has practiced thrift a large amount of times and cost.
Drawings
Fig. 1 is a schematic view of an installation structure of a tunnel roof instability grading early warning device provided by the utility model;
fig. 2 is a schematic cross-sectional view of a hollow anchor cable provided by the present invention;
fig. 3 is a flowchart of the staged early warning method for instability of the tunnel roof provided by the present invention.
Wherein,
the steel wire, 2 hollow anchor cables, 3 displacement sensor, 4 early warning device, 5 rock stratums, 6 anchor cable trays, 7 nuts, A tunnel roof, the anchor end of the hollow anchor cable of B, the end that stretches out of C steel wire.
Detailed Description
Example 1
In order to solve the problems in the prior art, as shown in fig. 1 to 2, the utility model provides a graded early warning device for instability of a roadway roof, which comprises a steel wire 1, a hollow anchor cable 2, a displacement sensor 3 and an early warning device 4;
the hollow anchor rope 2 is inserted into the rock stratum 5 and anchored on the roadway top plate A, the steel wire 1 is located in the hollow structure of the hollow anchor rope 2, one end of the steel wire 1 and one end, located in the rock stratum 5, of the hollow anchor rope 2 are fixed, the other end of the steel wire extends out of the anchoring end B of the hollow anchor rope 2, the extending end C of the steel wire 1 is connected with the displacement sensor 3, and the displacement sensor 3 is connected with the early warning device 4.
The utility model discloses in, tunnel roof unstability early warning device in grades still includes anchor rope tray 6 and nut 7, and anchor rope tray 6 is installed at the anchor end B of hollow anchor rope 2 and closely laminates with tunnel roof A, and nut 7 compresses tightly anchor rope tray 6.
Can insert a lot of ordinary anchor ropes in the stratum 5 in tunnel, ordinary anchor rope mainly plays certain supporting role to the tunnel, and the tunnel roof sinks and takes place in the immediate roof more, and when the tunnel roof took place the absciss layer and sinks, the anchor end of anchor rope can not change, consequently, when the roof sinks, the intraformational anchor rope of rock can extend, and when the elongation of anchor rope was greater than the maximum extension length of anchor rope, tunnel roof can the unstability, leads to the roof fall phenomenon to take place.
The anchor cable of the utility model is different from the common anchor cable in that the anchor cable of the utility model is a hollow anchor cable 2, a steel wire 1 is arranged in the hollow anchor cable 2, when the tunnel roof sinks to deform, the length between one end of the hollow anchor cable 2 inserted into the rock stratum 5 and the anchoring end B of the hollow anchor cable 2 can extend, because one end of the steel wire 1 and one end of the hollow anchor cable 2 inserted into the rock stratum 5 are fixed together, the other end extends out from the anchoring end B of the hollow anchor cable 2, and the extending end of the steel wire 1 is a movable end, the length of the steel wire between the end of the hollow anchor cable 2 inserted into the rock stratum 5 and the anchoring end B of the hollow anchor cable 2 can be lengthened, namely, the movable end of the steel wire 1 can generate displacement, the displacement direction is towards the direction of the fixed end of the steel wire 1 and the hollow anchor cable 2, therefore, the length, the shortened length of the steel wire 1 except the anchoring end B is equal to the extended length of the hollow anchor cable 2, so that the instability condition of the roadway roof can be known by comparing the displacement of the extending end of the steel wire 1 with the maximum extended length of the anchor cable.
In the utility model, the displacement change condition of the steel wire 1 can be measured by the displacement sensor 3, and the threshold value is set in the displacement sensor 3, the displacement of the extending end of the measured steel wire 1 is compared with the set threshold value, so as to judge the instability condition of the roadway roof, the utility model sets two threshold values for the displacement sensor 3, namely, the early warning period threshold value T1 and the high risk period threshold value T2, the early warning period threshold value T1 is 0.7L, the high risk period threshold value T2 is 0.8L, wherein, L is the maximum extension length of the hollow anchor rope 2, the maximum extension length L of the hollow anchor rope 2 is the difference between the length of the hollow anchor rope 2 when the hollow anchor rope is broken under the tensile force action and the initial length of the hollow anchor rope 2, the maximum extension length of the hollow anchor rope can be obtained by performing the tensile test on the hollow anchor rope, the material of the hollow anchor rope 2 is the same as the material of the common anchor rope for supporting action, therefore, the maximum extension length of the hollow anchor cable 2 is the same as that of a common anchor cable, namely, the extension condition of the anchor cable playing a role of supporting is indirectly reflected through the extension condition of the hollow anchor cable 2, when the displacement data of the extending end of the steel wire 1 does not reach 0.7L, the roadway roof is in a safe period, when the displacement data of the extending end of the steel wire 1 reaches 0.7L, the roadway roof enters an early warning period, and when the displacement data of the extending end of the steel wire 1 reaches 0.8L, the roadway roof enters a high-risk period.
When displacement data measured by the displacement sensor 3 reach different threshold values, namely when the roadway roof is in different periods, the displacement sensor 3 can output different electric signals and send the electric signals to the early warning device 4, and the early warning device 4 gives an alarm according to the received electric signals. Early warning device 4 can be for diode multicolor signal lamp, and when the displacement data that steel wire 1 stretches out the end reached different threshold values, displacement sensor 3 can export the not electric current of equidimension, and the not electric current of equidimension can trigger diode multicolor signal lamp and show different colours:
when the displacement data of the extending end of the steel wire 1 is greater than or equal to 0 and is less than the early warning period threshold value T1, the roadway roof is in a safe period, and the early warning device 4 displays green;
when the displacement data of the extending end of the steel wire 1 is greater than or equal to T1 and is less than a high-risk period threshold value T2, the roadway roof is in an early warning period, and the early warning device 4 displays yellow;
when the displacement data of the other end of the steel wire 1 is larger than or equal to the high-risk period threshold value T2, the roadway roof is in the high-risk period, and the early warning device 4 displays red.
So, personnel of work can come audio-visual judgement tunnel roof's absciss layer situation through the colour of observing early warning device 4 demonstration in the tunnel to in time consolidate the tunnel roof and repair, can effectively avoid the emergence of roof fall accident, the effectual security of having guaranteed.
The utility model discloses in, displacement sensor 3 can be for acting as go-between displacement sensor, and displacement sensor's stay cord of acting as go-between ties up the end that stretches out at steel wire 1. Other types of displacement sensors, such as laser displacement sensors, etc., may also be selected depending on the actual situation.
The utility model provides a tunnel roof unstability is early warning device in grades can follow tunnel direction every 20 m's position installation one to all carry out the early warning to the tunnel in different regions, when the installation plays the ordinary anchor rope of strutting effect, just can this tunnel roof unstability is early warning device in grades by directly fixed mounting, insert the hollow anchor rope 2 of the device in rock stratum 5 and anchor, consequently can accomplish tunnel roof unstability in-process to the tunnel support the installation of early warning device in grades, need not to use the rig to drill in addition and install, a large amount of time and cost have been practiced thrift.
Example 2
The embodiment provides a method for performing graded early warning of instability of a roadway roof by using the graded early warning device of instability of the roadway roof in embodiment 1, and as shown in fig. 3, the method includes:
step 1, extending a hollow anchor cable 2 when a roadway top plate A sinks, shortening the length of a steel wire 1 positioned outside an anchoring end B of the hollow anchor cable 2, and measuring displacement data of an extending end of the steel wire 1 by a displacement sensor 3 in real time;
the length of the steel wire 1 positioned outside the anchoring end B of the hollow anchor cable 2 is shortened, namely, the extending end of the steel wire 1 is displaced, and the displacement is equal to the elongation of the hollow anchor cable 2.
Step 2, the displacement sensor 3 judges the period of the roadway roof deformation according to the measured displacement data and the set threshold value and sends an electric signal to the early warning device 4;
when the displacement data of the extending end of the steel wire 1 is greater than or equal to 0 and is less than an early warning period threshold value T1, the roadway roof is in a safe period;
when the displacement data of the extending end of the steel wire 1 is greater than or equal to T1 and is less than a high-risk period threshold value T2, the roadway roof is in an early warning period;
when the displacement data of the other end of the steel wire 1 is greater than or equal to the high-risk period threshold value T2, the roadway roof is in the high-risk period;
the early warning period threshold T1 is 0.7L, the high risk period threshold T2 is 0.8L, and L is the maximum extension length of the hollow anchor cable 2
When the roadway is in different periods, the displacement sensor 3 can send different electric signals to the early warning device 4.
And 3, the early warning device 4 sends out an alarm according to the received electric signal.
When the tunnel roof is in a safe period, the early warning device 4 displays green according to the received electric signal;
when the roadway roof is in the early warning period, the early warning device 4 displays yellow according to the received electric signal;
when the tunnel roof is in a high-risk period, the early warning device 4 displays red according to the received electric signal.
The utility model provides a tunnel roof unstability stage early warning device can in time feed back the tunnel roof and warp the time of locating, carries out quantitative grading with the unstability situation of tunnel roof, and corresponding prevention measure is made to the hidden danger problem that probably appears to the timely monitoring of tunnel roof to more accurate realization, and the device can accomplish the installation at the in-process of strutting the tunnel, need not to use the rig to drill in addition and install, has practiced thrift a large amount of times and cost.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. The device is characterized in that the device comprises steel wires, hollow anchor cables, a displacement sensor and an early warning device;
the hollow anchor rope is inserted into a rock stratum and anchored on a roadway top plate, the steel wire is located in a hollow structure of the hollow anchor rope, one end of the steel wire and one end, located in the rock stratum, of the hollow anchor rope are fixed, the other end of the steel wire extends out of an anchoring end of the hollow anchor rope, the extending end of the steel wire is connected with a displacement sensor, and the displacement sensor is connected with the early warning device.
2. The roadway roof instability grading pre-warning device according to claim 1, further comprising an anchor cable tray and a nut, wherein the anchor cable tray is mounted at the anchoring end of the hollow anchor cable and is tightly attached to the roadway roof, and the nut compresses the anchor cable tray.
3. The roadway roof instability grade pre-warning device according to claim 1, wherein the displacement sensor is a stay wire displacement sensor, and a stay rope of the stay wire displacement sensor is tied to an extending end of the steel wire.
4. The roadway roof instability grade pre-warning device of claim 1, wherein the pre-warning device is a diode multi-color signal lamp.
5. The roadway roof instability grade pre-warning device according to any one of claims 1 to 4, wherein two thresholds are set in the displacement sensor, namely a pre-warning period threshold T1 and a high-risk period threshold T2,
the early warning period threshold value T1 is 0.7L, and the high risk period threshold value T2 is 0.8L, wherein L is the maximum extension length of the hollow anchor cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720534337.XU CN206753658U (en) | 2017-05-12 | 2017-05-12 | A kind of back unstability grading forewarning system device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720534337.XU CN206753658U (en) | 2017-05-12 | 2017-05-12 | A kind of back unstability grading forewarning system device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958459A (en) * | 2017-05-12 | 2017-07-18 | 中国矿业大学(北京) | A kind of back unstability grading forewarning system device and method for early warning |
| CN110067582A (en) * | 2019-05-05 | 2019-07-30 | 中国矿业大学 | For surrounding rock supporting, the anchor pole and its installation method of instability monitoring |
| CN111074955A (en) * | 2020-01-13 | 2020-04-28 | 东南大学 | Basalt fiber intelligent anchor rod detection system |
| CN112253192A (en) * | 2020-11-04 | 2021-01-22 | 中国煤炭科工集团太原研究院有限公司 | Coal roadway multidimensional and cooperative supporting method |
-
2017
- 2017-05-12 CN CN201720534337.XU patent/CN206753658U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958459A (en) * | 2017-05-12 | 2017-07-18 | 中国矿业大学(北京) | A kind of back unstability grading forewarning system device and method for early warning |
| CN110067582A (en) * | 2019-05-05 | 2019-07-30 | 中国矿业大学 | For surrounding rock supporting, the anchor pole and its installation method of instability monitoring |
| CN111074955A (en) * | 2020-01-13 | 2020-04-28 | 东南大学 | Basalt fiber intelligent anchor rod detection system |
| CN111074955B (en) * | 2020-01-13 | 2022-03-08 | 东南大学 | Basalt fiber intelligent anchor rod detection system |
| CN112253192A (en) * | 2020-11-04 | 2021-01-22 | 中国煤炭科工集团太原研究院有限公司 | Coal roadway multidimensional and cooperative supporting method |
| CN112253192B (en) * | 2020-11-04 | 2021-06-29 | 中国煤炭科工集团太原研究院有限公司 | Coal roadway multidimensional and cooperative supporting method |
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