CN103758571A - Bearing pressure audio detector for coal wall - Google Patents
Bearing pressure audio detector for coal wall Download PDFInfo
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- CN103758571A CN103758571A CN201310527203.1A CN201310527203A CN103758571A CN 103758571 A CN103758571 A CN 103758571A CN 201310527203 A CN201310527203 A CN 201310527203A CN 103758571 A CN103758571 A CN 103758571A
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- pressure
- bearing pressure
- expansion unit
- elastic expansion
- detector
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Abstract
The invention discloses a bearing pressure audio detector for a coal wall. The detector is characterized by comprising an injection molding pipe, wherein an elastic expansion unit covers the outer part of the outlet of the injection molding pipe, and an audio sensor and a corresponding plug are respectively arranged at the two sides of the elastic expansion unit; the injection molding pipe is a flooding pipe with a plugged end, liquid outlets are arranged on the peripheral wall of the blocked end, and the closed cylindrical elastic expansion unit covers the outer ends of the liquid outlets. A detecting slot hole is drilled; an expanded audio detector is arranged in the slot hole; pressure is inwards injected and injection molding pressure and audio records are monitored; when the injection mold is increased, the detector is outwards expanded and a hole wall is bursted; the injection molding pressure is recorded as the bearing pressure of the point, decompression is carried out, and then the detection of the next point is carried out; and a bearing pressure distribution curve chart is drawn according to the detected bearing pressure. Compared with the prior art, the absolute value of the bearing pressure can be conveniently obtained, and the detector has the advantages of quick and accurate detection.
Description
Technical field
The present invention relates to a kind of method and expansion audio frequency detector of monitoring the leading rib of coal-face and both sides, tunnel rib bearing pressure absolute value.
Background technology
Bearing pressure is the important component part of mine pressure, it is the key factor that affects work plane and stability of the roadway, grasp distributing discipline of abutment pressure, comprising the key character parameters such as distribution, high peak position, low pressure zone scope, is research mine pressure mechanism of production the important evidence that finally realizes mine pressure control.
Conventional bearing pressure monitoring method has boring flat jack method, boring string wire dynamometry and winnning-off displacement method.
But the stress that these methods relatively increase or reduce after all can only measuring and installing instruments, can not measure the order of magnitude of bearing pressure, to going decision-making to be subject to definitely to prop up the mine pressure control of pressure-bearing value effect by the bearing pressure value of increase and decrease relatively, usually cause mine pressure situation to be judged by accident, and then can not obtain correct effectively control.
Summary of the invention
The object of the present invention is to provide a kind of rib bearing pressure audio frequency detector, the absolute value that it can obtain bearing pressure directly, easily, have detection rapidly, advantage accurately.
For achieving the above object, the present invention by the following technical solutions:
A kind of rib bearing pressure audio frequency detector, includes note pressure pipe, the flexible expansion cell of outlet outer wrap of note pressure pipe, and at least one side of elastic expansion unit is provided with audio sensor.
Further, at least one side of described elastic expansion unit is provided with plug.
Further, described note pressure pipe is hard liquid injection pipe, and one end shutoff of liquid injection pipe is provided with fluid hole on the perisporium of liquid injection pipe shutoff end one side, and the outer end burden of fluid hole has tubular elastic expansion unit, the closed at both ends of elastic expansion unit.
Further, the two ends of described elastic expansion unit are respectively provided with an audio sensor.
Further, along liquid injection pipe axially, the outside of audio sensor is provided with plug.
Further, described elastic expansion unit in be provided with pressure sensor.
Operating principle of the present invention and beneficial effect show:
Detection method comprises the following steps:
A, along getting out one in work plane front rib or tunnel side direction rib, comprise the whole bearing pressure slotted hole of excursion from big to small;
B, expansion audio frequency detector is set in slotted hole, in slotted hole, by a direction, to other direction, is measured successively: to note in expansion audio frequency detector presses and monitor note pressure pressure, audio sensor is monitored also record audio; With the increase of showwing loving care for and pressing, detector outwards expands and starts and contacts with the hole wall of boring, extremely outwards expand and push drill hole inner wall; Along with the carrying out of outside expansion extruding, the hole wall spalling of this position, the audio frequency that audio sensor monitors now strengthens suddenly; Record this and put corresponding note pressure pressure, the bearing pressure that this note pressure pressure is this survey mark, then pressure release, descends the detection of a bit;
The bearing pressure that C, basis detect is drawn bearing pressure scatter chart.
The present invention gets out a slotted hole on leading rib or both sides, tunnel rib, and the degree of depth of this slotted hole should comprise whole bearing pressure excursion from big to small.
Expansion audio frequency detector is set in slotted hole, by fluid injection in expansion audio frequency detector, expansion audio frequency detector outwards expands and hole wall is exerted pressure, when outside pressure exceedes the pressure bearing of this hole wall, hole wall place starts to occur by the phenomenon of spalling, now, audio sensor senses hole wall spalling and records this sound, quieter because of original pressurising, hole wall is during by spalling, and audio sensor has a larger fluctuation; Record now corresponding pressurising pressure, this pressurising pressure that hole wall is carried out to spalling be the bearing pressure of this point, draws bearing pressure figure.
For guaranteeing the accuracy of whole bearing pressure, during measurement, along slotted hole, by a direction, to another direction, monitored, such as from outside to inside or from inside to outside.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the application, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing;
Fig. 1 is swollen audio frequency detector schematic diagram;
Fig. 2 is monitoring schematic diagram.
The specific embodiment
In order to make those skilled in the art person understand better the technical scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the application's part embodiment, rather than whole embodiment.Based on the embodiment in the application, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all should belong to the scope of the application's protection
The present invention, by state natural sciences fund, is numbered 51374137 project researchs and completes; As shown in Figure 1, a kind of rib bearing pressure audio frequency detector, include hard liquid injection pipe 1, one end shutoff of liquid injection pipe 1 is evenly provided with some fluid holes 2 on the perisporium of liquid injection pipe 1 shutoff end one side, and the outer end burden of fluid hole 2 has tubular elastic expansion unit 3, the closed at both ends of elastic expansion unit 3, the two ends of elastic expansion unit 3 are respectively provided with an audio sensor 4, and the connecting line of audio sensor 4 is external, and the outside of audio sensor 4 is respectively provided with a column plug 5.
For guaranteeing the accuracy of pressure detecting, in elastic expansion unit 3, be provided with pressure sensor 6.
During measurement, as shown in Figure 2
A, according to concrete monitoring location, select suitable angle and size, the degree of depth, along getting out one in work plane front rib or tunnel side direction rib, comprise the whole bearing pressure slotted hole 7 of excursion from big to small;
B, at the interior expansion audio frequency detector that arranges of slotted hole 7, in slotted hole 7, by a direction, to other direction, measured successively, in Fig. 2,8 is monitoring point, such as from outside to inside: to fluid injection in expansion audio frequency detector, audio sensor 4 monitoring record audios; Along with the increase of liquid filling pressure, the elastic expansion unit 3 of detector outwards expands and contacts with the hole wall of slotted hole 7 with beginning, extremely outwards expand and push slotted hole 7 inwalls; Along with the carrying out of outside expansion extruding, slotted hole 7 inwalls there will be the phenomenon being risen brokenly, and when audio sensor 4 monitors hole wall and risen brokenly, audio frequency adds suddenly a little louder; Record this and put corresponding note pressure pressure, the bearing pressure that this note pressure pressure is this survey mark, then pressure release, stretches into expansion audio frequency detector, descends the detection of a bit.
The bearing pressure that C, basis detect is drawn bearing pressure scatter chart.
The above is only the application's preferred embodiment, makes those skilled in the art can understand or realize the application.To the multiple modification of these embodiment, will be apparent to one skilled in the art, General Principle as defined herein can, in the case of not departing from the application's spirit or scope, realize in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a rib bearing pressure audio frequency detector, is characterized in that: include note pressure pipe, and the flexible expansion cell of outlet outer wrap of note pressure pipe, at least one side of elastic expansion unit is provided with audio sensor.
2. rib bearing pressure audio frequency detector according to claim 1, is characterized in that: at least one side of described elastic expansion unit is provided with plug.
3. rib bearing pressure audio frequency detector according to claim 1, it is characterized in that: described note pressure pipe is hard liquid injection pipe, one end shutoff of liquid injection pipe, on the perisporium of liquid injection pipe shutoff end one side, be provided with fluid hole, the outer end burden of fluid hole has tubular elastic expansion unit, the closed at both ends of elastic expansion unit.
4. according to the rib bearing pressure audio frequency detector described in claim 1 or 2 or 3, it is characterized in that: the two ends of described elastic expansion unit are respectively provided with an audio sensor.
5. rib bearing pressure audio frequency detector according to claim 1, is characterized in that: along liquid injection pipe axially, the outside of audio sensor is provided with plug.
6. rib bearing pressure audio frequency detector according to claim 4, is characterized in that: in described elastic expansion unit, be provided with pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310527203.1A CN103758571A (en) | 2013-10-31 | 2013-10-31 | Bearing pressure audio detector for coal wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310527203.1A CN103758571A (en) | 2013-10-31 | 2013-10-31 | Bearing pressure audio detector for coal wall |
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| Publication Number | Publication Date |
|---|---|
| CN103758571A true CN103758571A (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310527203.1A Pending CN103758571A (en) | 2013-10-31 | 2013-10-31 | Bearing pressure audio detector for coal wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592071A (en) * | 2013-10-31 | 2014-02-19 | 山东科技大学 | Voice frequency detection method for bearing pressure of coal wall |
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| US4733567A (en) * | 1986-06-23 | 1988-03-29 | Shosei Serata | Method and apparatus for measuring in situ earthen stresses and properties using a borehole probe |
| JPH10220160A (en) * | 1997-02-05 | 1998-08-18 | Sanko Consultant Kk | Hydraulic crusher stress measurement method and device thereof |
| CN1203670A (en) * | 1995-12-07 | 1998-12-30 | 国际壳牌研究有限公司 | Use of acoustic emission in rock formation analysis |
| CN102182512A (en) * | 2011-03-10 | 2011-09-14 | 北京大学深圳研究生院 | Unit structure for coal mine roof sound emission monitoring |
| CN102608296A (en) * | 2012-02-17 | 2012-07-25 | 浙江大学 | Device and method for simulating and monitoring expanding and cracking of concrete |
| CN103033565A (en) * | 2012-12-07 | 2013-04-10 | 山东大学 | Acoustical emitting and resistivity joint monitoring device and monitoring method of fracture process of rock specimen |
| CN103592071A (en) * | 2013-10-31 | 2014-02-19 | 山东科技大学 | Voice frequency detection method for bearing pressure of coal wall |
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2013
- 2013-10-31 CN CN201310527203.1A patent/CN103758571A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4733567A (en) * | 1986-06-23 | 1988-03-29 | Shosei Serata | Method and apparatus for measuring in situ earthen stresses and properties using a borehole probe |
| CN1203670A (en) * | 1995-12-07 | 1998-12-30 | 国际壳牌研究有限公司 | Use of acoustic emission in rock formation analysis |
| JPH10220160A (en) * | 1997-02-05 | 1998-08-18 | Sanko Consultant Kk | Hydraulic crusher stress measurement method and device thereof |
| CN102182512A (en) * | 2011-03-10 | 2011-09-14 | 北京大学深圳研究生院 | Unit structure for coal mine roof sound emission monitoring |
| CN102608296A (en) * | 2012-02-17 | 2012-07-25 | 浙江大学 | Device and method for simulating and monitoring expanding and cracking of concrete |
| CN103033565A (en) * | 2012-12-07 | 2013-04-10 | 山东大学 | Acoustical emitting and resistivity joint monitoring device and monitoring method of fracture process of rock specimen |
| CN103592071A (en) * | 2013-10-31 | 2014-02-19 | 山东科技大学 | Voice frequency detection method for bearing pressure of coal wall |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592071A (en) * | 2013-10-31 | 2014-02-19 | 山东科技大学 | Voice frequency detection method for bearing pressure of coal wall |
| CN103592071B (en) * | 2013-10-31 | 2016-01-20 | 山东科技大学 | Rib support pressure audio-frequency detection |
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Application publication date: 20140430 |