CN105178959A - On-site coal elastoplasticity immediate test method - Google Patents
On-site coal elastoplasticity immediate test method Download PDFInfo
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- CN105178959A CN105178959A CN201510707463.6A CN201510707463A CN105178959A CN 105178959 A CN105178959 A CN 105178959A CN 201510707463 A CN201510707463 A CN 201510707463A CN 105178959 A CN105178959 A CN 105178959A
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Abstract
The invention discloses an on-site coal elastoplasticity immediate test method. The on-site coal elastoplasticity immediate test method comprises the steps that a hole in the horizontal direction is drilled in coal in a seam gateway within the areas in which disasters probably happen, a cylindrical flexible capsule is placed in the hole and clung to the wall of the hole, and the elastoplasticity of the coal is determined according to the ratio of a flow rate A to a flow rate B during loading and unloading of the cylindrical flexible capsule, wherein when A/B is larger than or equal to 3, the coal is plastic coal, and otherwise, the coal is elastic coal. The on-site coal elastoplasticity immediate test method can realize continuous on-site testing as required, can immediately judge the elastoplasticity, and therefore, has positive effects in controlling such dynamic phenomena as roof and seam disasters and particularly rock burst.
Description
Technical field
The invention belongs to Coal Mining Technology field.
Background technology
The accident phenomenons such as seam mining often destroys coal body class (power) disaster caused along with coal petrography, as quick-fried in roof collapse, roadway roof absciss layer, coal and gas prominent, bump, coal, one of the main reasons is that coal seam is destroyed and caused fault offset.Along with the increase of the pit mining degree of depth, the dynamic disaster that this destruction in coal seam is caused is more and more serious.Research shows, eliminates this power destruction, needs to know coal body elastic-plastic behavior instantly, and its most dangerous state is the process of elasticity transfer plasticity, needs the change of this mechanical state of instant perception coal body.Therefore, the elastoplasticity distribution of coal body can be judged at the scene fast, significant to prevention and control coal body disaster.
For the dangerous coal seam of bump, just dynamic phenomenon is there is in tunnelling process, after tunnel is formed, because energy constantly gathers, also dynamic phenomenon can occur when not being disturbed, at disturbance region, the danger of impacting coal seam dynamic disaster constantly increases, during working face mining, the crossheading of first advance certain distance is also important deathtrap.If Continuous Observation the change of the mechanical property in perception coal seam instantly can be accomplished to this of coal body by the change procedure of elasticity as plasticity, to dynamic disasters such as control bumps, there is positive role.Therefore invent a kind of coal body to the deathtrap under tectonic province, heavily stressed, great burying condition to carry out the plastoelastic method of on-the-spot follow-on test there is Great significance.
Goal of the invention
Object of the present invention, is the deathtrap in order to instant continuity judgement generation colliery coal body class dynamic disaster and degree of danger, proposes a kind of simple, easy scene and immediately test the plastoelastic method of coal body.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of plastoelastic method of on-the-spot instant test coal body, step is as follows:
The first step, in the heading in coal mine work area front, according to condition of coal seam occurrence, determines to there is region that is heavily stressed, High confinement of energy, and the delineation of this region is the deathtrap that colliery coal body class disaster likely occurs;
Second step, may occur in the heading in above-mentioned disaster region in delineation, in distance base plate heading 1.5-1.8m position to the boring in coal body construction level direction, the general 7-10m of aperture 42mm, hole depth;
3rd step, arranges test macro; Test macro is by a cylindrical pliable capsule and formed with the water booster system of pressure meter and flowmeter; Above-mentioned cylindrical pliable capsule one end is provided with outlet valve, and the other end is provided with connector, and capsule axis is provided with taut wire, can only expanded radially under taut wire effect; First cylindrical pliable capsule outlet valve is opened during layout, be connected with water booster system with high-pressure hose, start water booster system, liquid is filled with to cylindrical pliable capsule, gas is discharged simultaneously, when cylindrical pliable capsule evacuate air, liquid are full of, close outlet valve and water booster system simultaneously, again the cylindrical pliable capsule being full of liquid is put into foot of hole, now cylindrical pliable capsule should be close to drill hole wall;
4th step, restart water booster system, start to be filled with liquid to cylindrical pliable capsule, now cylindrical pliable capsule starts to expand, when fluid pressure starts to rise, illustrate that cylindrical pliable capsule reaches setting load, record the current just bulging force value of fluid pressure, and to adjust flowmeter initial value be zero; When continuation pressurization reaches 25-30MPa, stop loading, record the flow value A entering cylindrical pliable encapsulated liquid; Then unload, the boring of being risen bounces back, and makes the liquid backflow of cylindrical pliable capsule, when fluid pressure is unloaded to first bulging force value, stops unloading, records in discharge time section from the liquid stream value B that cylindrical pliable capsule flows out; Then according to the elastoplasticity of the flow value A of Load-unload and the ratio size determination coal body of B value; Through test, when A/B >=3, can judge that coal body is plasticity coal body, otherwise be elasticity coal body.
Operating principle good effect of the present invention is: by adding coal body, carry and unloading test, according to Load-unload effect principle, observes the flow effect of two kinds of behaviors, when capacity of returns is large, illustrate that coal body retains original elasticity, otherwise illustrate that coal body follows the string, become plasticity coal body.The present invention as required can follow-on test at the scene, immediately can judge elastoplasticity, have positive role to dynamic phenomenon such as control top board, coal seam disaster, particularly bump etc.
Accompanying drawing explanation
Fig. 1 is that the present invention draws a circle to approve test zone figure;
Fig. 2 is test macro schematic diagram of the present invention.
Marginal data, 1-water booster system, 2-flowmeter, 3-pressure meter, 4-flowmeter, 5-connector, 6-cylindrical pliable capsule, 7-outlet valve, 8-taut wire.
Detailed description of the invention
Further illustrate embodiment with reference to the accompanying drawings.
A kind of plastoelastic method of on-the-spot instant test coal body, step is as follows:
The first step, in the heading in coal mine work area front, according to condition of coal seam occurrence, determines to there is region that is heavily stressed, High confinement of energy, and the delineation of this region is the deathtrap that colliery coal body class disaster likely occurs; Elliptic region is the deathtrap that colliery coal body class disaster likely occurs as can be seen from Figure 1;
Second step, delineation may occur in the heading in above-mentioned disaster region, to the boring in coal body construction level direction, the general 7-10m of aperture 42mm, hole depth, hole spacing base plate heading 1.5-1.8m; To hole as can be seen from Figure 1 deployment scenarios;
3rd step, arranges test macro; As shown in Figure 2, by under a natural swelling state, suitable cylindrical pliable capsule 6 and the water booster system 1 with pressure meter 3 and flowmeter 2 formed test macro with bore diameter; Above-mentioned cylindrical pliable capsule 6 one end is provided with outlet valve 7, and the other end is provided with connector 5, and capsule axis is provided with taut wire 8, can only expanded radially under taut wire 8 acts on; First cylindrical pliable capsule outlet valve 7 is opened during layout, be connected with water booster system 1 with high-pressure hose 4, start water booster system 1, liquid is filled with to cylindrical pliable capsule 6, gas is discharged simultaneously, when cylindrical pliable capsule 6 evacuate air, liquid are full of, close outlet valve 7 and water booster system 1 simultaneously, again the cylindrical pliable capsule 6 being full of liquid is put into foot of hole, cylindrical pliable capsule 6 and drill hole wall are close to;
4th step, restart water booster system 1, start to be filled with liquid to cylindrical pliable capsule 6, now cylindrical pliable capsule 6 starts to expand, when fluid pressure starts to rise, illustrate that cylindrical pliable capsule 6 reaches setting load, record the current just bulging force value of fluid pressure, and to adjust flowmeter 2 initial value be zero; When continuation pressurization reaches 25-30MPa, stop loading, record the flow value A entering cylindrical pliable capsule 6 liquid; Then slowly unload, the boring of being risen bounces back, and makes the liquid backflow of cylindrical pliable capsule 6, when fluid pressure is unloaded to first bulging force value, stops unloading, records in discharge time section from the liquid stream value B that cylindrical pliable capsule 6 flows out; Then according to the elastoplasticity of the flow value A of Load-unload and the ratio size determination coal body of B value; Through test, when A/B is more than or equal to 3, can judges that this coal body is plasticity coal body, otherwise be elasticity coal body.
Claims (1)
1. the plastoelastic method of coal body is tested at scene immediately, and it is characterized in that, step is as follows:
The first step, in the heading in coal mine work area front, according to condition of coal seam occurrence, determines to there is region that is heavily stressed, High confinement of energy, and the delineation of this region is the deathtrap that colliery coal body class disaster likely occurs;
Second step, may occur in the heading in above-mentioned disaster region in delineation, in distance base plate heading 1.5-1.8m position to the boring in coal body construction level direction, aperture 42mm, hole depth 7-10m;
3rd step, arranges test macro; Test macro is by a cylindrical pliable capsule and formed with the water booster system of pressure meter and flowmeter; Above-mentioned cylindrical pliable capsule one end is provided with outlet valve, and the other end is provided with connector, and capsule axis is provided with taut wire, can only expanded radially under taut wire effect; First cylindrical pliable capsule outlet valve is opened during layout, be connected with water booster system with high-pressure hose, start water booster system, liquid is filled with to cylindrical pliable capsule, gas is discharged simultaneously, when cylindrical pliable capsule evacuate air, liquid are full of, close outlet valve and water booster system simultaneously, again the cylindrical pliable capsule being full of liquid is put into foot of hole, now cylindrical pliable capsule should be close to drill hole wall;
4th step, restart water booster system, start to be filled with liquid to cylindrical pliable capsule, now cylindrical pliable capsule starts to expand, when fluid pressure starts to rise, illustrate that cylindrical pliable capsule reaches setting load, record the current just bulging force value of fluid pressure, and to adjust flowmeter initial value be zero; When continuation pressurization reaches 25-30MPa, stop loading, record the flow value A entering cylindrical pliable encapsulated liquid; Then unload, the boring of being risen bounces back, and makes the liquid backflow of cylindrical pliable capsule, when fluid pressure is unloaded to first bulging force value, stops unloading, records in discharge time section from the liquid stream value B that cylindrical pliable capsule flows out; Then according to the elastoplasticity of the flow value A of Load-unload and the ratio size determination coal body of B value; Through test, when A/B >=3, can judge that coal body is plasticity coal body, otherwise be elasticity coal body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510707463.6A CN105178959B (en) | 2015-10-27 | 2015-10-27 | The plastoelastic method of coal body is tested at a kind of scene immediately |
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| CN201510707463.6A CN105178959B (en) | 2015-10-27 | 2015-10-27 | The plastoelastic method of coal body is tested at a kind of scene immediately |
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| CN105178959A true CN105178959A (en) | 2015-12-23 |
| CN105178959B CN105178959B (en) | 2017-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2625616C1 (en) * | 2016-03-02 | 2017-07-17 | Федеральное государственное бюджетное учреждение науки Институт геоэкологии им. Е.М. Сергеева Российской академии наук (ИГЭ РАН) | Device for measuring ground deformation |
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| DE10008450C1 (en) * | 2000-02-23 | 2001-09-27 | Montan Tech Gmbh | Test drilling to assess the risk of a rock fall at a coal mine uses high pressure water jets to drill into the mine seam with measurements of at least one drilling parameter to be correlated with the level of danger |
| CN1433862A (en) * | 2003-02-27 | 2003-08-06 | 武汉理工大学 | Method for preparing composition gradient intermediate transition layer on wedge shape or complex shape drill working-surface |
| CN202914103U (en) * | 2012-11-14 | 2013-05-01 | 山东科技大学 | Overlying rock beam fault zone height and range monitoring system of coal mine stope |
| CN103090780A (en) * | 2013-01-11 | 2013-05-08 | 山东科技大学 | Mine drilling micro displacement measurement instrument |
| CN104453898A (en) * | 2014-10-23 | 2015-03-25 | 山东科技大学 | Deep hole blasting and static water injecting combining coal seam weakening method |
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2015
- 2015-10-27 CN CN201510707463.6A patent/CN105178959B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10008450C1 (en) * | 2000-02-23 | 2001-09-27 | Montan Tech Gmbh | Test drilling to assess the risk of a rock fall at a coal mine uses high pressure water jets to drill into the mine seam with measurements of at least one drilling parameter to be correlated with the level of danger |
| CN1433862A (en) * | 2003-02-27 | 2003-08-06 | 武汉理工大学 | Method for preparing composition gradient intermediate transition layer on wedge shape or complex shape drill working-surface |
| CN202914103U (en) * | 2012-11-14 | 2013-05-01 | 山东科技大学 | Overlying rock beam fault zone height and range monitoring system of coal mine stope |
| CN103090780A (en) * | 2013-01-11 | 2013-05-08 | 山东科技大学 | Mine drilling micro displacement measurement instrument |
| CN104453898A (en) * | 2014-10-23 | 2015-03-25 | 山东科技大学 | Deep hole blasting and static water injecting combining coal seam weakening method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2625616C1 (en) * | 2016-03-02 | 2017-07-17 | Федеральное государственное бюджетное учреждение науки Институт геоэкологии им. Е.М. Сергеева Российской академии наук (ИГЭ РАН) | Device for measuring ground deformation |
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| CN105178959B (en) | 2017-06-16 |
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