A method of and system for monitoring roof load capacity index in mining headings.
Abstract
3. A system for monitoring the load capacity index of a mining heading roof, consisting of measuring paths, an analysing system and a visualisation system, connected to the examined device. It is characterised in that it has two sets of pressure sensors (c1, ... cn) and two sets of displacement sensors (p1, ... pn), fixed to the structure of hydraulic props (2) of a mechanised mining cribbing (1) and functionally connected to a microchip recorder (3), powered from a spark arresting power feeder (4.)
Term
No projected expiry on record.
- Priority and filed
- Granted
- Today
5 claims: 2 independent, 3 dependent
- 1A method of monitoring the indicator for assessing the bearing capacity of the roof of mining excavations, consisting in the continuous measurement and recording of data related to the deflection of the roof plane, using sensors mounted on the stands, characterized by the fact that at least two sensors for measuring the stand slide and measuring the pressure of the plunger space of the hydraulic stand are installed simultaneously, in the first row of powered support stands, the distance of the nearest measuring station is> 20 m from the under- or over-wall walkway, and the measurement begins immediately after the support section is stretched and ends immediately before it is stolen, and at the same time the distance between each of the stands and the face of the wall is measured before and after the passage of the mining machine, as well as the angle of the stand inclination and all these data in the form of parameters are entered into the microprocessor recorder, and then, based on the measurement data and parameters, the floor load-bearing capacity assessment index w is determined0, being the proportion of the value of the unit slope of the ceiling zli to the allowable value of the unit slope of the ceiling Zdop. 1. Sposób monitorowania wskaźnika oceny nośności stropu wyrobisk górniczych polegający na ciągłym pomiarze i rejestracji danych związanych z ugięciem płaszczyzny stropu, wykorzystując czujniki zamontowane na stojakach, znamienny tym, że zakłada się jednocześnie co najmniej po dwa czujniki pomiarowej zsuwu stojaka i pomiaru ciśnienia przestrzeni podtłokowej stojaka hydraulicznego, w pierwszym szeregu stojaków obudowy zmechanizowanej, przy czym odległość najbliższego stanowiska pomiarowego wynosi > 20 m od chodnika pod- lub nadścianowego, a pomiar rozpoczyna się zaraz po rozparciu sekcji obudowy, a kończy bezpośrednio przed jej zrabowaniem, oraz jednocześnie mierzy się odległość pomiędzy każdym ze stojaków, a czołem ściany przed i po przejściu maszyny urabiającej, a także kąt nachylenia stojaka i wszystkie te dane w postaci parametrów wprowadza się do rejestratora mikroprocesowego, a następnie na podstawie danych pomiarowych i parametrów wyznacza się wskaźnik oceny nośności stropu w0, będący proporcją wartości jednostkowego nachylenia stropu zli do dopuszczalnej wartości jednostkowego nachylenia stropu Zdop.
- 3A system for monitoring the indicator for assessing the bearing capacity of the mining excavation roof, built of measuring tracks, an analyzing system and a visualization system, connected to the tested device, characterized by the fact that it has at least:two sets of pressure sensors (c1, .... cn) and two sets of displacement sensors (p1, .... p "), mounted on the structure of hydraulic props (2) of the mechanized mining support (1) and functionally connected with a microprocessor recorder (3), which is powered from an intrinsically safe power supply (4) . 3. Układ do monitorowania wskaźnika oceny nośności stropu wyrobisk górniczych, zbudowany z torów pomiarowych oraz układu analizującego i układu wizualizacji, połączonych z badanym urządzeniem, znamienny tym, że ma co najmniej: dwa komplety czujników ciśnienia (c1, .... cn) i dwa komplety czujników przemieszczenia (p1, .... p„), umocowane na konstrukcji stojaków hydraulicznych (2) zmechanizowanej obudowy górniczej (1) i połączone funkcjonalnie z mikroprocesorowym rejestratorem (3), który jest zasilany z iskrobezpiecznego zasilacza (4).
Independent claims2
15 paragraphs, as filed
The subject of the invention is a method and system for monitoring the indicator of the bearing capacity of the roof of mining excavations in the underground of mining plants.
It is known from the Polish invention application P 309 133 pt. "Measurement method and a device for measuring and recording the convergence of the roof in the excavated walls of coal seams of hard coal mines" method, which consists in the fact that in the coal wall of the excavation operated with the use of a pneumatic filling - measurement lines in which five stands are installed abrasives, at different intervals. The stands are built after the cutting machine has passed through and the wall height has been measured, the measurement lines being determined at a distance of 2 and 2 of the total length of the wall. The stands are spread, their feet and heads are anchored and secured with screws against self-sliding, and each stand is measured. Then, after the longwall excavation has been backfilled and the powered support units have been moved, continuous measurement and registration of the ceiling convergence is carried out.
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- using sensors mounted on friction stands. The method according to the known solution has the disadvantage of permanently positioning the props in the uplifted part of the mining excavation and the inability to measure the deflection and at the same time to assess the load-bearing capacity of the roof with the advancement of the support.
The aim of the invention is to eliminate the disadvantage of the known solution and to develop a method that allows for continuous measurement and registration of deflection together with the assessment of the load-bearing capacity of the ceiling, while simultaneously moving the longwall powered support. According to the invention, this aim has been achieved in the scope of the method of monitoring the indicator for assessing the bearing capacity of a mining excavation roof. The method consists in installing at least two measuring sensors at the same time: the slide of the stand and the pressure measurement of the plunger space of the hydraulic stand, in the first row of powered supports, where the distance of the nearest measuring station is> 20 m from the under- or over-the-wall walkway.
The measurement begins as soon as the casing section is stretched and ends immediately before its looting. At the same time, the distance between each of the stands and the face of the wall is measured before and after the cutting machine passes, as well as the stand inclination angle. All these data in the form of parameters are entered into the microprocessor recorder, and then, on the basis of the measurement data and parameters, the floor load-bearing capacity assessment index wo is determined. The evaluation index in "is the proportion of the unit value of the ceiling slope zl1 to the permissible unit value of the ceiling slope Zdop. After reaching the value of the assessment index w <,> 1.1, monitoring is stopped in order to undertake technical activities aimed at increasing the support of the support supporting the roof of the excavation in which the longwall complex operates. The start and end of the collection of measurement data and parameters is determined automatically in conjunction with the operating cycle of the complex.
It is known from the Polish patent No. 139 934 entitled "Device for assessing and monitoring the technical condition of machines, especially rotating machines" - a system solution that allows observation and basic analyzes to be carried out directly at the workplace, during machine operation. The device has measuring lines connecting the tested machine with the following systems: visualization of vibrations on the screen of an oscillographic tube and an analysis system coupled with it for measuring vibration parameters and marking the measuring point on the oscillogram. The device also has a reference track that connects the machine to the visualization and analyzing systems, which track is used to mark the phase zero point of the waveform. The known device is mainly used to assess the condition of rotating machines during operation, with the possibility of observing various types of malfunctions, such as e.g. damage to the bearings and the resulting play in the machine subassemblies. The disadvantage of the known device is the inability to register and process the collected data and measurements in the microprocessor, as well as the inability to continuously monitor along with the machine that moves cyclically during operation, which takes place in mechanized mining supports. the inconvenience of the known solution and will ensure the possibility of measurement data recording and processing for machines whose nature of operation is associated with cyclic shifting within the entire complex.
This goal was achieved by constructing a system for monitoring the indicator of the bearing capacity of the mining excavation roof, which has at least two sets of pressure sensors and two sets of displacement sensors, mounted on the structure of props of a mechanized mining support and functionally connected with a microprocessor recorder. The recorder is powered from an intrinsically safe power supply and may have an additional data transmission unit installed. The data transmission unit preferably consists of xd crrAiw rnnrlpnipm
V * X -------------- - -laełrtm c <str ^ nv e αΰ acranfAew
JVU11VJ Łj X XX XX XWX νΐΐΐ ^ connected to the computer port.
Preferably, the monitoring system has three sets of pressure sensors and displacement sensors each.
The system according to the invention is shown in the embodiment in the drawing, Fig. 1 shows a side view of a section of a motorized mining support with sensors and a recorder, and Fig. 2 shows a block diagram of the system.
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The mechanized mining support 1 has hydraulic props 2 on which are mounted: a displacement sensor pj and a pressure sensor c of the piston space. Moreover, on the front side of one of the hydraulic props 2 there is a microprocessor recorder 3. All sensors Ci ... c and pi ... pn are connected to the recorder 3, which is powered from the intrinsically safe power supply 4. The recorder 3 connects to the data transmission unit, which consists of the modem 5 and the coupled modem 6, connected to the computer port 7.
The method and system of monitoring the indicator for assessing the bearing capacity of the mining excavation roof are used in hard coal mines and are helpful in comparing the design assumptions with significant exploitation.
1 sheet
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Every citation, both ways
| Document | Relation | Office | Cited during |
|---|---|---|---|
| US9739148B2 | Cited by | United States of America | Applicant |
| US10184338B2 | Cited by | United States of America | Applicant |
3 priority claims, no other members on record
Priority claims3
| Document | Office | Kind | Date |
|---|---|---|---|
| 32958398 | Poland | A | |
| 98329583 | – | – | – |
| PL19980329583 | – | – | – |
1 legal event, as the office reported them to INPADOC
Events
| Event | Code | |
|---|---|---|
| Decisions on the lapse of the protection rightsLapsedLAPS | LAPS |
Numbers
- Publication, DOCDB
- 189946
- Publication, EPODOC
- PL189946B
- Application
- 98329583
- Application, DOCDB
- 32958398
- Application, EPODOC
- PL19980329583
Titles2
- English
- METHOD OF AND SYSTEM FOR MONITORING LOAD CAPACITY OF MINE WORKING ROOF
- Polish
- Sposób i układ do monitorowania wskaźnika oceny nośności stropu wyrobisk górniczych
Classification
- IPC, 2
- E21F17 18
- G01B5 30