CN102645674B - Three-dimensional detection method for use before exploitation of working surface coal bed - Google Patents
Three-dimensional detection method for use before exploitation of working surface coal bed Download PDFInfo
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- CN102645674B CN102645674B CN201210112477XA CN201210112477A CN102645674B CN 102645674 B CN102645674 B CN 102645674B CN 201210112477X A CN201210112477X A CN 201210112477XA CN 201210112477 A CN201210112477 A CN 201210112477A CN 102645674 B CN102645674 B CN 102645674B
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Abstract
The invention discloses a three-dimensional detection method for use before exploitation of a working surface coal bed. The method comprises the following specific steps of: detecting whether a buried geological structure exists at the position of the working surface coal bed by adopting a radio wave tunnel penetration technology, and determining the specific position and range of the buried geological structure; detecting whether a buried water guide structure exists in the range of a working surface bottom plate or top plate by adopting an amplitude-frequency-electricity penetration technology, and determining the specific position and range of the buried water guide structure; detecting whether a buried water guide structure exists below a tunnel bottom plate by adopting a direct-current depth measurement technology, and evaluating; and completely detecting whether buried water guide structures exist inside the working surface and on the bottom plate, the top plate and the periphery by adopting a transient electromagnetic detection technology. The three-dimensional detection method has the beneficial effects that true space detection is realized, the water inrush hidden trouble situation in the damage influence range of stoping on the working surface coal bed can be checked to the maximum extent, accidents are effectively avoided, and the life and property safety of people are ensured.
Description
Technical field
The present invention relates to a kind of detection method, front three-dimensional probe method is adopted in especially a kind of workplace coal seam, belongs to coal seam and adopts front geophysical prospecting technology field.
Background technology
Traditional workplace is adopted front physical prospecting, belongs to take the narrow sense that workplace inside and floor undulation be main detected object and survey.Can only have or not latent permeable structure and gushing water hidden danger to be surveyed, estimate to workplace inside and floor undulation, belonging to semispace surveys, be based on workplace and adopt a kind of static instrumentation of front state of nature, do not consider back production to workplace top and may lie concealed permeable structure or water body in the formation damage coverage on every side, and causing the situation of gushing water.
On October 29th, 1991, three exploiting fields, the Nan Zhuan of Yancheng mineral bureau ore deposit-130 level south stop adopting latter 103 days, especially big hysteresis water inrush accident, and water yield 2820m3/h, full ore deposit stops production.Main cause is under ore deposit pressure, hydraulic pressure combined action, and the 2030 100 meters position Korea Spro 1 tomography water preventing abilities in the workplaces outside change, and Ordovician karst water is outstanding along distributed fault, leads to water inrush.
2009, in the Tonghua, Jilin Province Meihekou City and colliery " 11.27 " top board water (mud) accident of bursting, 16 miners are wrecked.Immediate cause is exactly working face extraction, and the top board mining-induced fissure is linked up the old dead zone of ponding, top, cause water, mud, husky all under, flood that roadway workface causes.
On May 29th, 2011, water leak accident, dead 13 people occur in Fu Hong colliery, Zhu Chang town, Guiyang City, Guizhou Province; May 31, water leak accident, dead 8 people occur in the den of illegally mining, Guizhou Province's In Qiannan one place.Culprit is all that goaf, recovery process middle and upper part ponding situation is unclear, adopts to destroy and is with the old dead zone of communication to cause water leak accident.
Most working face extraction gushing waters and adopt rear gushing water, with to adopt destruction relevant, are all the inevitable outcomes of adopting destruction crack and latent conduit pipe (or water body) conducting.And these gushing water hidden danger both be present in floor undulation below, also be present in each orientation, space such as face roof top, workplace periphery.These gushing water hidden danger may be both Ordovician karst water, old empty water, may be also water guide karst collapse col umn or water guide tomography, water guide crack dense band etc.For such as face roof top, peripheral these the latent gushing water Hidden Danger Detections of workplace, tradition is adopted front detection method and is not all paid attention to, and therefore easily causes accident to occur.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of workplace coal seam and adopts front three-dimensional probe method, can realize the omnibearing stereo of gushing water hidden danger situation in workplace coal seam back production destroying infection scope is surveyed, and effectively avoids the generation of water inrush accident.
For solving the problems of the technologies described above, the technical solution used in the present invention is: front three-dimensional probe method is adopted in a kind of workplace coal seam, and its method step is as follows:
(1) adopt perspective layer position, technology detection operations face coal seam, radiowave tunnel whether to have latent tectonic structure, and determine its particular location and scope;
(2) adopt amplitude-frequency electricity perspective technology, to whether there being latent permeable structure in floor undulation or top board scope surveyed, and determine its particular location and scope;
(3) adopt the DC detecting deep technology, to the roadway floor below, whether exist latent permeable structure to be surveyed and estimate;
(4) adopt the transient electromagnetic detecting technology, to workplace inside, base plate, top board and periphery, whether exist latent permeable structure to survey comprehensively.
In described step (1), tunnel perspective acceptance point spacing is 10 meters, and the launching site spacing is less than or equal to 50 meters, and the corresponding tunnel length that receives of launching site single-point is not less than 150 meters.
The electric sounding dot spacing is less than or equal to 20 meters in described step (3), and depth measurement is controlled and entered 70 meters of 30 meters of ashes difficult to understand or floor undulation belows.
Detection angle in the same space direction in described step (4) is more than two.
Said method by the total space of adopting leading face inside, base plate and expand to the workplace Affected areas by mining, is realized three-dimensional probe by conventional investigative range, and investigative range contains a plurality of orientation such as workplace inside, base plate, top board, periphery.Detection method is also cheated on electric perspective technology, floor undulation electricity perspective technology and Electric Sounding Technology in Survey of Wellpit basis, tunnel at traditional Seam Mining workplace radiowave, has increased the comprehensive transient electromagnetic detecting technology of workplace.Because this technology fully takes into account the dynamic failure impact of working face extraction on surrounding, realized space exploration truly, can survey to greatest extent, find out the gushing water hidden danger situation in working face extraction destroying infection scope, therefore, can scientificlly and effectively avoid in back production and back production after water inrush accident.
Beneficial effect of the present invention is as follows: on the basis of the present invention's geophysical prospecting method before adopt in conventional operation face coal seam, increase the detection of face roof and peripheral direction, adopt the transient electromagnetic detecting technology to realize the omnibearing stereo detection in workplace coal seam, realized space exploration truly, can find out to greatest extent the gushing water hidden danger situation in workplace coal seam back production destroying infection scope, effectively avoid accident to occur, guarantee people's the security of the lives and property.
Embodiment
Front three-dimensional probe method is adopted in workplace of the present invention coal seam, and concrete steps are as follows:
(1) adopt perspective layer position, technology detection operations face coal seam, radiowave tunnel whether to have latent tectonic structure, and determine its particular location and scope.Tunnel perspective acceptance point spacing is 10 meters, and the launching site spacing is less than or equal to 50 meters, and the corresponding tunnel length that receives of launching site single-point is not less than 150 meters.
(2) adopt amplitude-frequency electricity perspective technology, to whether there being latent permeable structure in floor undulation or top board scope surveyed, and determine its particular location and scope.
(3) adopt the DC detecting deep technology, to the roadway floor below, whether exist latent permeable structure to be surveyed and estimate.The electric sounding dot spacing is less than or equal to 20 meters, and depth measurement is controlled and to be entered 70 meters of 30 meters of ashes difficult to understand or floor undulation belows.
(4) adopt the transient electromagnetic detecting technology, to workplace inside, base plate, top board and periphery, whether exist latent permeable structure to survey comprehensively.
The present invention mainly contains following several different embodiment.
Scheme one: Lao Kong pools zone, workplace top is surveyed
Adopt ring workplace multi-angle to wearing Detection Techniques.According to workplace scale, coal winning method, mining height, locus, goaf, top, adopt the transient electromagnetic directional detection technology, the face roof oblique upper is carried out to the 3-5 angle detection.
Adopt wide less, transient electromagnetic detecting distance when workplace and can meet when the workplace spatial dimension is carried out to all standing, only survey and help to get final product in roadway workface; Adopt wide large, transient electromagnetic detecting distance can not cover whole workplace the time when workplace, need help to survey in roadway workface on basis, increase directly over back and outer side orientation detection, guarantee workplace and peripheral " prolonging limit " covering.
Scheme two: floor undulation is surveyed
This scheme designs for the workplace that exists the permeable structures such as base plate Ordovician karst water and hidden karst pillar, tomography to threaten in exploitation process, its principal feature is the Integrated using of multiple geophysical prospecting method, and investigative range comprises the whole spatial dimensions such as workplace inside, base plate and periphery.
Floor undulation is surveyed, and transient electromagnetic detecting is general to be used in conjunction with conventional electric sounding, electric perspective technology.On-the-spot along the oblique arranged beneath 2-3 of a side detection angle in roadway workface, its severity control scope is mainly considered three aspect factor, and base plate is adopted collapse dept, basal water buried depth and grouting and reinforcing layer position.Take Xingtai Mining Area as example, under main mining coal seam, apart from 40 meters left and right of gray area strong aquifer difficult to understand, accompany one deck thin layer Benxi limestone between coal seam and ash difficult to understand, back production causes floor damage of working face generally in 20 meters, and extreme case can be over 50 meters.Therefore, according to the Control of floor degree of depth, enter the calculating of 30 meters, grey top difficult to understand, transient electromagnetic detecting should be attached most importance to the floor below 20-70 rice degree of depth, encrypts range of control.
It should be noted that, which scene selects plant the geophysical prospecting method combination, need choose according to workplace scale, coal seam to the parameter science of carrying out such as basal water spacing.
Generally can be divided into following several situation:
(1) the little broad wall (adopt wide be less than 60 meters) of adopting
This class workplace is wide less owing to adopting, and the electric perspective technology maximum probe degree of depth often only has more than 20 meters, substantially belongs to invalid detection, generally can omit.At this time, can adopt the tunnel electric sounding to be aided with transient electromagnetic combined detection technology.By two lane electric sounding intensive measurements, draw several different depths and survey the explanation tangent plane, as main explanation map.Transient Electromagnetic Technique is mainly born the tiltedly peripheral detection mission in below of floor undulation, oblique below detection angle 2-3 in face.
(2) the medium broad wall (adopting wide 60-200 rice) of adopting
This class workplace is the most common, generally can adopt electric sounding, electricity perspective, the conventional combined detection technology of transient electromagnetic.In the transient electrical magnetic surface, tiltedly below detection angle 2-3 is individual.
(3) adopt greatly broad wall (adopt and be wider than 2000 meters)
This class workplace is adopted wide too large, and electricity perspective signal is weak or no signal generally, can't use, and can adopt electric sounding, transient electromagnetic combined detection technology.Transient electromagnetic, due to the range finding problem, often is not enough to workplace is carried out to all standing detection.Therefore, in face, the oblique below of transient electromagnetic detection angle need increase to 3-4, abundant to guarantee data volume, and can draw the certain depth transient electromagnetic detecting that meets accuracy requirement and explain tangent plane, and as mainly explaining map.
Scheme three: workplace is peripheral to be surveyed
Whether workplace is peripheral is surveyed, mainly for the workplace periphery, adopt in the destroying infection scope and exist the gushing water hidden danger such as water guide tomography, karst collapse col umn to be surveyed.
Survey mainly at the upper and lower crossheading of workplace and cut outside eye and help to carry out, consider that stopping adopting eye tunnel, line-spacing limit has tens meter ampere full distances, so measuring point generally can not arranged in eye tunnel, limit.
Same orientation detection angle is generally 2.The seat earth below be take as main in the main key-course position of surveying, and between 2 detection angles, angle is unsuitable excessive, general 15 °～20 °.The plane control width requirement is as far as possible far away, minimumly is no less than 50 meters.
Claims (4)
1. front three-dimensional probe method is adopted in a workplace coal seam, it is characterized in that, its method step is as follows:
(1) adopt perspective layer position, technology detection operations face coal seam, radiowave tunnel whether to have latent tectonic structure, and determine its particular location and scope;
(2) adopt amplitude-frequency electricity perspective technology, to whether there being latent permeable structure in floor undulation or top board scope surveyed, and determine its particular location and scope;
(3) adopt the DC detecting deep technology, to the roadway floor below, whether exist latent permeable structure to be surveyed and estimate;
(4) adopt the transient electromagnetic detecting technology, to workplace inside, base plate, top board and periphery, whether exist latent permeable structure to survey comprehensively.
2. front three-dimensional probe method is adopted in workplace according to claim 1 coal seam, it is characterized in that, in described step (1), tunnel perspective acceptance point spacing is 10 meters, and the launching site spacing is less than or equal to 50 meters, and the corresponding tunnel length that receives of launching site single-point is not less than 150 meters.
3. front three-dimensional probe method is adopted in workplace according to claim 1 coal seam, it is characterized in that, the electric sounding dot spacing is less than or equal to 20 meters in described step (3), and depth measurement is controlled and entered 70 meters of 30 meters of ashes difficult to understand or floor undulation belows.
4. front three-dimensional probe method is adopted in workplace according to claim 1 coal seam, it is characterized in that, the detection angle in the same space direction in described step (4) is more than two.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102681017B (en) * | 2012-05-31 | 2014-11-05 | 河北煤炭科学研究院 | Amplitude-frequency electric perspective detection method |
| CN103529479B (en) * | 2013-10-29 | 2016-10-05 | 淮南矿业(集团)有限责任公司 | Coal mine underground tunnel perspective detection system |
| CN103867229B (en) * | 2014-03-12 | 2016-05-11 | 河北煤炭科学研究院 | A kind of coal mine large-mining is dark prevents and treats comprehensive treatment method for water with lower group of coal mining |
| CN103924975B (en) * | 2014-04-16 | 2016-01-20 | 河北煤炭科学研究院 | A kind of for the water-retaining method in coal mining process |
| CN104819010B (en) * | 2015-03-26 | 2016-10-05 | 山东科技大学 | The construction method of prevention top board and Water Inrush when a kind of coal mine work area crosses water conductive fault |
| CN109944635B (en) * | 2019-04-15 | 2021-08-17 | 河北煤炭科学研究院有限公司 | Exploration and treatment method for deep hidden water guide structure of working face |
| CN111208571B (en) * | 2020-01-21 | 2022-03-11 | 太原理工大学 | Well-ground combined detection method for multilayer mining water accumulation area |
| CN111708089B (en) * | 2020-06-30 | 2021-09-17 | 中国矿业大学 | Electromagnetic induction coal face structure detection method |
| CN114019577A (en) * | 2021-09-13 | 2022-02-08 | 云南滇东雨汪能源有限公司 | Method, computer equipment and medium for advanced exploration of water-rich property in front of driving face |
| CN113960680A (en) * | 2021-10-27 | 2022-01-21 | 河北煤炭科学研究院有限公司 | Pre-mining transient electromagnetic detection construction and interpretation method for water-bearing zone at upper part of short-distance coal seam |
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Address after: 054000 Hebei Academy of Coal Sciences, No.126 Tuanjie West Street, Xingtai City, Hebei Province Patentee after: Hebei Coal Science Research Institute Co.,Ltd. Address before: 054000 Hebei Academy of Coal Sciences, No.126 Tuanjie West Street, Xingtai City, Hebei Province Patentee before: HEBEI COAL Research Institute |