CN1087075C - Intellectualized measurement technology and equipment of coal rock strength - Google Patents
Intellectualized measurement technology and equipment of coal rock strength Download PDFInfo
- Publication number
- CN1087075C CN1087075C CN 91108169 CN91108169A CN1087075C CN 1087075 C CN1087075 C CN 1087075C CN 91108169 CN91108169 CN 91108169 CN 91108169 A CN91108169 A CN 91108169A CN 1087075 C CN1087075 C CN 1087075C
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- coal
- rock
- test
- motor
- microprocessor
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- Expired - Fee Related
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- 239000003245 coal Substances 0.000 title claims abstract description 50
- 239000011435 rock Substances 0.000 title claims abstract description 35
- 238000005516 engineering process Methods 0.000 title description 10
- 238000005259 measurement Methods 0.000 title 1
- 238000012360 testing method Methods 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 2
- 239000007858 starting material Substances 0.000 claims 1
- 238000013178 mathematical model Methods 0.000 abstract description 5
- 238000011160 research Methods 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000009795 derivation Methods 0.000 abstract description 2
- 239000000428 dust Substances 0.000 abstract description 2
- 206010063385 Intellectualisation Diseases 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
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Abstract
The present invention provides a testing technique and a device for measuring the strength of coal rock bodies intelligently. The device is composed of a rotary electric driller, an air supply system, a dust removing system and a microprocessor testing system. According to force analysis, theoretical derivation and experimental research when a drill bit is used for cutting and peeling coal rock, a mathematical model of the strength of the cut and peeled coal rock and the turning moment of a motor output shaft is established, and an advanced intellectualization testing technique and a reasonable testing technological process are used so as to form a method and a device capable of testing the strength of the coal rock continuously and intelligently under the condition of scenes.
Description
The present invention relates to a kind of intelligent testing method 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), broken coal petrography and prevent that the fragmentation of coal petrography from being the peculiar contradiction of mining engineering is correctly estimated coal petrography soundness index and is measured coal petrography soundness index exactly, is the prerequisite of this contradiction of processing.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 sample, 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, patterning method, methods such as rock drilling specific force, their weak point is;
1. the directly solid coefficient and the mechanical index of square coal and rock in face of the surveying work;
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 boring work carries 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.Such as, frictional resistance moment changes with the drilling depth increase between drilling rod and the wall of a borehole.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 test macro and mathematical model, 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 all handled in real time to the mechanical loss of motor stator and rotor copper loss, iron loss and motor.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.
The 3rd, adopt rational test technology process, eliminate of the influence of some factors to 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 cuts 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. after finishing one section tens meters follow-on test, test section length can be selected arbitrarily.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 card 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 boards machine 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 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 is littler than the test data of other mine rock property parameter; 2. test macro can correctly reflect the 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 presses, gas is to the influence of coal and rock intensity with reflecting; 4. test process is simple, and is less to producing influence, and the present invention has realized that first coal and rock intensity is continuous, intelligent test.
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 by the exploitation of MCS-51 series boards machine.In the every field of mining engineering, particularly in the research of coal 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 (1)
1. intelligent testing method that is used to measure coal and rock intensity, it is characterized in that: the tests microprocessor system that adopts single card microcomputer, A/D analog to digital conversion plate and circuit for signal conditioning to be combined into, the input electric power analog signal conversion of electric drill motor (5) is become digital signal, by single card microcomputer data are carried out calculation process, with 40 through the mean value of the intensity level after the error correction coal and rock intensity as this test section, its method of testing step is as follows:
A. the coal and rock intensity level on a certain fixed segments length that at first requires to know according to test purpose is determined section length;
B. starter motor (5) allows drill bit (1) idle running not cut coal and rock, and the idle torque by above-mentioned microprocessor mensuration and record motor (5) deposits in the internal memory as primary data;
C. rotate handwheel (7), the control electric drill moves forward along guide rail (12), and drilling rod (3) and drill bit (1) rotation are advanced and cut coal and rock, and along with creeping into of drill bit (1), the torque value by the real-time motor of output of above-mentioned microprocessor (5) deposits in the internal memory;
D. above-mentioned sectionalization test length is 5 centimetres, by the microprocessor METHOD FOR CONTINUOUS DETERMINATION and be recorded in 40 torque values in this segment limit, deposits in the internal memory;
E. again with the motor torque value in above-mentioned motor idle torque value and the boring procedure, carry out error correction respectively by microprocessor;
F. pass through the torque value after the error correction,, get the coal and rock intensity of the mean value of 40 numbers as this test section by handling by above-mentioned microprocessor.
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 CN1059599A (en) | 1992-03-18 |
| CN1087075C true CN1087075C (en) | 2002-07-03 |
Family
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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) |
Families Citing this family (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 |
| 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 |
| CN104727851B (en) * | 2015-02-01 | 2017-01-04 | 山东科技大学 | Colliery stope surrouding rock stress fast evaluation method |
| CN106053274B (en) * | 2016-05-17 | 2019-11-29 | 西南石油大学 | A kind of rock abrasiveness parameter and abrasion-resistant metal parameter test 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 |
| CN112504816B (en) * | 2020-12-17 | 2022-06-07 | 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
Also Published As
| Publication number | Publication date |
|---|---|
| CN1059599A (en) | 1992-03-18 |
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