CN1059599A - Coal and rock intensity intelligent test technology and device - Google Patents
Coal and rock intensity intelligent test technology and device Download PDFInfo
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- CN1059599A CN1059599A CN 91108169 CN91108169A CN1059599A CN 1059599 A CN1059599 A CN 1059599A CN 91108169 CN91108169 CN 91108169 CN 91108169 A CN91108169 A CN 91108169A CN 1059599 A CN1059599 A CN 1059599A
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Abstract
The invention provides a kind of measuring technology and device of intelligent measuring coal and rock intensity, it is by rotary electric drill, air feed system, dust pelletizing system and tests microprocessor system form, force analysis when cutting the stripping coal petrography according to drill bit, theoretical derivation and experimental study, set up the mathematical model of being cut stripping coal and rock intensity and motor output shaft torque, the intelligent test technology of application of advanced and rational test technology process have formed the new method and the device that under a kind of condition at the scene coal and rock intensity are carried out continuous intelligent test.
Description
The present invention relates to a kind of intelligent test technology and device that is used to measure coal and rock intensity, it belongs to coal and rock strength test technical field.
As everyone knows, mining engineering mainly to as if rock (comprising coal), destroying coal petrography and prevent that the fragmentation of coal petrography from being the peculiar contradiction of mining engineering, correctly estimate the coal petrography soundness and measure coal petrography soundness index exactly, is the prerequisite of handling this contradiction.Coal and gas are outstanding to be one of disaster serious during mine is produced, and generation that coal and gas are outstanding and development are the results by these three big key element combined actions of physico-mechanical properties of terrestrial stress, gas and coal body.Aspect the research of prediction gas method for protrusion, all be that the parameter of testing these three big key elements of reflection is directly or indirectly started with basically.With regard to the mechanical property of test coal body, at present, also do not have simple and easy to do, accurately and reliably, unified standard method.
The main method that is commonly used to measure coal and rock intensity and solid coefficient in China's mining engineering circle is a Pu Shi solid coefficient method, the value that this method is measured, in fact reflection is the ability of the anti-fragmentation of coal, rather than the coal mass strength that plays an important role in outstanding generation and evolution.Also have uniaxial compressive strength in addition, point load intensity, rebound hardness is invaded hardness, the chip method, cutting method, rock drilling is than methods such as merits, and their weak point is:
1. can not directly measure the solid coefficient and the mechanical index of workplace the place ahead coal and rock;
2. can not carry out the multiple spot follow-on test;
3. test process complexity, equipment is huge;
4. data processing technique falls behind;
5. the normal production operation of influence in the test process.
Problem at above measuring technology exists the objective of the invention is to study a kind of measuring technology modernization, data acquisition computerization, and test process and mining work can be carried out simultaneously, and along with the continuous passing of the workplace new technology of multi-point sampler continuously.
The objective of the invention is to realize by following proposal:
Rotary electric is drilled in the process of coal and rock internal drilling, it is the process that the drill bit blade is cut the stripping coal and rock continuously, by mechanical analysis, theoretical derivation and experimental study are set up on the drill bit between the torque and coal and rock intensity, the relational expression on the drill bit between torque and the motor input electric power.Therefore, the electric power by testing of electric motors input and resolve the mathematical model of having set up just can be measured the coal and rock intensity level of being cut stripping.
The size of torque realizes by following approach on the test drill bit.Torque is provided by torque on the motor output shaft on the drill bit, and the size of torque on the motor output shaft influences the variation of motor intake again.But, the size of motor input electric power, directly with motor output shaft on the size of torque become unary linear relation, but be subjected to multiple factor affecting, will cause the variation of motor stator, rotor copper loss and iron loss such as the variation of the stator of motor and rotor current.Be not changeless relation between the torque on torque and the drill bit on the motor output shaft, but influenced by drilling depth and cut the stripping coal mass strength to influence.Increase with drilling depth such as frictional resistance moment between, drilling rod and the wall of a borehole and to change, rig also is the amount of a variation from the tractive force of trailer system.
From the above mentioned as seen be the value that to try to achieve coal and rock intensity by the value of measuring input TURP rate, by common test instrumentation and method of testing.The present invention realizes above-mentioned purpose by following technological approaches.
At first, on theory analysis and basis of experimental, set up the mathematical model of test macro, considered different factors in the mathematical model in the influence of different phase, adopted the technological process of information feedback technology and sectionalization test, eliminated the influence of the different factors of different phase test macro.
The second, adopt advanced microprocessor intelligence measuring technology, real-time image data, real-time processing data, real-time resolving test macro mathematical model, solve and cut stripping coal and rock intensity level, and according to the charge value that records, application of motor load and no-load characteristic are handled in real time to mechanical loss of motor stator and rotor copper loss, iron loss and motor etc.With rig creep into the difference that records the coal and rock intensity level, be stored in the internal memory, show and print the coal and rock intensity level of mensuration when needed.
Three, adopt rational test technology process, eliminate of the influence of some factors test macro.
1. when determining drill bit (1) idle running, the torque on the motor output shaft deposits in the internal memory as primary data.
2. when drill bit is cut the stripping coal petrography continuously, use measuring technology noted earlier, with going deep into of boring, can choose, determine a quilt wantonly and cut stripping place coal and rock intensity level every a segment distance (about 5 centimetres), distance, and this measured value is the mean value that is distributed in more than 40 follow-on test value in 5 centimetre lengths.Characterize this place's coal petrography intensity with this value, have advantages of higher stability and reliability, the coal petrography intensity level of measuring on difference can directly be demonstrated by lattice lcd display, and is stored in the internal memory.The measured value of internal memory printablely when needed goes out.
3. finish one section in a big way behind the follow-on test, test section length can be selected arbitrarily, can reach tens meters in coal body.Torque when foot of hole, drill bit (1) idle running on the testing of electric motors output shaft combines with the initial value that the first step is measured, and can determine drilling rod and the wall of a borehole frictional resistance moment, by microprocessor the intensity level of having tested is carried out error correction then.Exist in the internal memory through the intensity level of revising, printablely when needing go out, also can demonstrate.
In the test, Intelligentized test system can be realized Distance Test suitably away from the working position of electric drill at the scene.
The 4th, Intelligentized test system is made up of the hardware and software two large divisions, and hardware system can be made up of single card microcomputer, A/D analog to digital conversion plate and circuit for signal conditioning, also can be developed to the intelligent test instrument by single-chip microcomputer and peripheral chip and form.At present, we are using the smart instrumentation of the special test coal and rock intensity of MCS-51 series monolithic exploitation.Its performance is better than the test macro be made up of TP801B single card microcomputer etc. greatly.
Test macro below in conjunction with compositions such as accompanying drawing and single card microcomputer and analog to digital conversion plates is further described the present invention.
Accompanying drawing is coal and rock intensity intelligent test technology and schematic representation of apparatus.It is made up of drill bit (1), threeway (2), drilling rod (3), gas injection device (4), motor (5), cable (6), control handwheel (7), bearing support (8), dust guiding tube (9), draft tube (10), fly-ash separator (11), guide rail (12), Signal Conditioning Equipment, mould/number conversion and interface card and TP801B single card microcomputer.Also be equipped with the software test program of the 4K byte of establishment in the Intelligentized test system.Realized the purpose of coal and rock intensity intelligent test.Under laboratory condition, the present invention simulated experiment examination and research have been carried out.
The result shows: 1. the discreteness of test data than the test data of other mine rock property parameter and little, 2. test macro can correctly reflect variation on the intensity of test block, 3. the present invention can directly determine the intensity of coal and rock under the factor effects such as being subjected to terrestrial stress, gas pressure, tectonic structure, can be correctly press with reflecting, gas is to the influence of coal and rock intensity, 4. test process is simple, and is less to producing influence.The present invention has realized continuous, the accurate intelligent test of coal and rock intensity first.
The present invention has broad application prospects.We are being engaged in special smart instrumentation research at present, and have worked out the smart instrumentation model machine of being developed by the MCS-51 series monolithic.In the every field of mining engineering, particularly in the research of coal and gas outburst mechanism and forecasting procedure, have great importance.Our " eight or five " brainstorm project and center for doctors's fund project of bearing at present, all with the present invention as technical foundation.Practical application of the present invention will change the backwardness of present coal and outstanding forecasting procedure of gas and forecasting technique, makes coal and rock strength test technology and coal and gas give prominence to forecasting procedure modernization, intellectuality.For the modernization of Coal Production and safety is contributed.
Claims (7)
1, a kind of intelligent testing method that is used to measure coal and rock intensity is characterized in that new test philosophy, advanced intelligent test technology, and complete proving installation and test technology process combine, and complement each other and purchase into a kind of new measuring method.
2, coal and rock intensity intelligent testing method according to claim 1, it is characterized in that test philosophy is: the process of electric drill boring, be the process that the drill bit blade is cut the stripping coal petrography continuously, draw torque on the drill bit and cut the relation of shelling between the coal petrography intensity by mechanical analysis.Through theoretical derivation, experimental study, set up the mathematical model between drill torque and the motor input electric power.The tests microprocessor system, the mathematical model that collection in real time, deal with data, real-time resolving have been set up, and application message feedback technique and rational test technology process are eliminated the influence of various factors to test macro stage by stage.By direct mensuration motor input electric power, determine the intensity of being cut the stripping coal and rock.
3, according to claim 1,2 described coal and rock intensity intelligent testing methods, it is characterized in that adopting information feedback technology and sectionalization test technological process to eliminate of the influence of different factors to test macro, application of motor dynamic characteristic and unloaded characteristic curve, eliminate stator and rotor copper loss, iron loss and electromechanics loss according to the electric quantity change value of measuring, can eliminate the influence of drilling rod and the wall of a borehole frictional resistance moment determination data according to the technological process of sectionalization test.
4, according to the intelligent testing method of claim 1,2,3 described coal and rock intensity, it is characterized in that the sectionalization test technological process is, the motor output shaft torque value exists in the internal memory as initial value when at first measuring electric drill idle running; When the second, electric drill began to hole, with going deep into of boring, (optional fixed apart from length) determined the intensity level of being cut the stripping coal petrography and this value existed in the internal memory at a certain distance, this value be distributed in this at interval on the mean value of test value repeatedly, representative.The coal and rock intensity level at boring different depth place is gone out by METHOD FOR CONTINUOUS DETERMINATION; Three, after the test of finishing a segment distance, measure drill bit motor output shaft torque when dallying at the bottom of the hole, and in conjunction with initial value, frictional resistance moment is to the influence of the coal and rock intensity level of mensuration between elimination drilling rod and the wall of a borehole, intensity level through revising exists in the internal memory, can show and print when needed.
5, a kind of intelligent test device that is used to measure coal and rock intensity, it is characterized in that this device is made up of motor, drilling rod, drill bit, bearing support, guide rail, chain and tests microprocessor system, drilling rod (3) is installed gas injection device (4), pressurized air is entered by the gas injection device, discharge by drill bit (1) air hole, with this wind-force gang drill powder; Three-way connection (2) is installed in position, aperture in boring, and fly-ash separator (11) is connected with three-way connection (2) by dust guiding tube (9), and rig has from haulage gear, and rig (5) is advanced by control wheel (7) control or retreats.
6, the intelligent test device of coal and rock intensity according to claim 5 is characterized in that rig has from hitch structure, and it is by the electric drill reducer casing, and transmitting gear, chain, guide rail are formed.
7, the intelligent test device of coal and rock intensity according to claim 5, it is characterized in that the tests microprocessor system is made up of hardware system and software systems, hardware system is made up of the smart instrumentation of microcomputer development or is made up of single card microcomputer, mould/number conversion interface card and circuit for signal conditioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108169 CN1087075C (en) | 1991-09-10 | 1991-09-10 | Intellectualized measurement technology and equipment of coal rock strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108169 CN1087075C (en) | 1991-09-10 | 1991-09-10 | Intellectualized measurement technology and equipment of coal rock strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1059599A true CN1059599A (en) | 1992-03-18 |
| CN1087075C CN1087075C (en) | 2002-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91108169 Expired - Fee Related CN1087075C (en) | 1991-09-10 | 1991-09-10 | Intellectualized measurement technology and equipment of coal rock strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1087075C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101131091B (en) * | 2007-07-26 | 2011-12-21 | 煤炭科学研究总院重庆分院 | Down-hole coal bed air-pressing helix drilling tools and drilling method using the same |
| CN103728175A (en) * | 2014-01-06 | 2014-04-16 | 西南石油大学 | Multiparameter testing device for drilling rock mechanics |
| CN104727851A (en) * | 2015-02-01 | 2015-06-24 | 山东科技大学 | Rapid assessment method for coal stope surrounding rock stress |
| CN106053274A (en) * | 2016-05-17 | 2016-10-26 | 西南石油大学 | Rock abrasiveness parameter and metal wear resistance parameter testing device |
| CN107378052A (en) * | 2017-09-08 | 2017-11-24 | 桂林加宏汽车修理有限公司 | A kind of drilling equipment and method based on MEMS |
| CN112504816A (en) * | 2020-12-17 | 2021-03-16 | 东华理工大学 | Rock mechanics true triaxial experimental apparatus |
-
1991
- 1991-09-10 CN CN 91108169 patent/CN1087075C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101131091B (en) * | 2007-07-26 | 2011-12-21 | 煤炭科学研究总院重庆分院 | Down-hole coal bed air-pressing helix drilling tools and drilling method using the same |
| CN103728175A (en) * | 2014-01-06 | 2014-04-16 | 西南石油大学 | Multiparameter testing device for drilling rock mechanics |
| CN103728175B (en) * | 2014-01-06 | 2016-01-06 | 西南石油大学 | A kind of drilling well rock mechanics multi-parameters test device |
| CN104727851A (en) * | 2015-02-01 | 2015-06-24 | 山东科技大学 | Rapid assessment method for coal stope surrounding rock stress |
| CN104727851B (en) * | 2015-02-01 | 2017-01-04 | 山东科技大学 | Colliery stope surrouding rock stress fast evaluation method |
| CN106053274A (en) * | 2016-05-17 | 2016-10-26 | 西南石油大学 | Rock abrasiveness parameter and metal wear resistance parameter testing device |
| CN107378052A (en) * | 2017-09-08 | 2017-11-24 | 桂林加宏汽车修理有限公司 | A kind of drilling equipment and method based on MEMS |
| CN112504816A (en) * | 2020-12-17 | 2021-03-16 | 东华理工大学 | Rock mechanics true triaxial experimental apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1087075C (en) | 2002-07-03 |
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