CN102155213A - Dynamic detection method for mine mining-induced fracture - Google Patents
Dynamic detection method for mine mining-induced fracture Download PDFInfo
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- CN102155213A CN102155213A CN2011100881227A CN201110088122A CN102155213A CN 102155213 A CN102155213 A CN 102155213A CN 2011100881227 A CN2011100881227 A CN 2011100881227A CN 201110088122 A CN201110088122 A CN 201110088122A CN 102155213 A CN102155213 A CN 102155213A
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Abstract
The invention discloses a dynamic detection method for a mine mining-induced fracture. The difficulty and blindness of gas drainage level position gives rise to problems that the level position of the gas drainage borehole arrangement is too high, the mining-induced fracture is underdeveloped, the gas drainage difficulty is big and the efficiency is low; the excessive lower level position of the gas drainage borehole arrangement easily gives rise to problems that a working surface seriously leaks wind, the normal running of a mine ventilation system is affected, the stability of the rock stratum is bad, and the effective gas drainage time is short. The method comprises the following steps of: detecting positions, parameters and numbers of boreholes by design; constructing before mining a stopping line and detecting the boreholes, carrying out the water leakage detection and recording data; taking a vertical height as a standard to normalize detection data, forecasting the development height of the mining-induced fracture after different mining times. The method can improve conditions of blind hole arrangement, short service life and low efficiency aiming at high position gas mining, increases the reasonableness of the hole arrangement and prolongs the mining time; and the method is beneficial to the scientific formulation of an under-water-body mining system, reduces the possibility of water outgoing of the water body, reduces the cost of coal mining and gas mining and improves the economic efficiency.
Description
Technical field
The present invention relates to a kind of dynamic testing method of mine mining induced fissure.
Technical background
Along with increasing mine is opened up to the deep, the harm of mine gas and prevent more importantly, at the great disaster of this mine of gas source, a lot of mines have all been set up, and mine gas extraction system is as the measure that effects a permanent cure that solves the mine gas disaster.Administer the high-order gas pumping technology of developing at adjacent layers and this coal-bed gas, to be the excessive effective measures of gushing out of gas that solve in the mine exploitation process undoubtedly, but because difficulty and blindness that extraction layer position selected, it is unreasonable to cause high-order extraction borehole to arrange, the cost height, efficient is low and person property's significant wastage, trace it to its cause mainly is because not enough to the understanding of mine mining induced fissure band development trend, caused or because the layer position that extraction borehole is arranged is too high, the mining induced fissure agensis, the extraction difficulty is big, and efficient is low; Perhaps the layer position arranged of extraction borehole is low excessively, easily causes work plane seriously to divulge a secret, and influence mine ventilation system and run well, the time-parallel strata poor stability, it is difficult in maintenance hole, effective extraction time weak point, even can't pore-forming, extraction efficient is difficult to assurance.Simultaneously,, can predict the possibility of stoping period water body, important directive significance be arranged adjusting mine back production system by the mining induced fissure detection of dynamic to swallet for the situation that the working seam top has water body to exist.Therefore, the distribution rule of development that detects mining induced fissure has great significance for mine gas extraction and coal mining under water bodies, directly affects the effect of hole pumping and mining gas and the safety of coal mining under water bodies.
For the efficient of the high-order boring of maximum performance gas pumping and the safety of coal mining under water bodies, must improve accuracy and precision to mining induced fissure rule of development understanding.At present commonly used rule of thumb or there is the cost height in the test means selecting to arrange high-order mash gas pumping drilling and design back production system, blindness is big and problem such as unreliable.
Summary of the invention
Technical problem solved by the invention provides a kind of situation that can improve present at high-order gas pumping cloth hole blindness, life-span weak point, inefficiency, increases cloth hole reasonability, prolongs the dynamic testing method of the mine mining induced fissure of extraction time.
For solving above-mentioned technical problem, the technical scheme that the present invention takes:
The dynamic testing method of mine mining induced fissure is characterized in that: described method realizes by following steps:
The first step: bore position, parameter and quantity thereof are surveyed in design: survey the boring design near the back production line, vertical plane with back production line place is a detected object, all borings are all parallel with the working face extraction direction, boring length is stopped adopting the line correspondence position and is as the criterion to reach, 5 borings of minimum design, survey needs to satisfy, the inclination angle is spent to 60 degree from 20;
Second step: survey boring in back production construction before stop adopting line, carry out first round water-leaking property after finishing immediately and detect also record data;
The 3rd step: to survey boring carry out through hole processing to stopping adopting line after 10 days in back production, carry out second after finishing immediately and take turns water-leaking property detection and record data;
The 4th step: to survey boring carry out through hole processing to stopping adopting line after 20 days in back production, carry out the third round water-leaking property after finishing immediately and detect and record data;
The 5th step: to survey boring carry out through hole processing to stopping adopting line after 30 days in back production, carry out the four-wheel water-leaking property after finishing immediately and detect and record data;
The 6th step: with the vertical height is standard criterion detection data, the survey data are converted on the vertical distance of measuring point apart from basic point by hole depth, selection is laid the platform end face of rig as basic point, the 3rd step to the survey data that the 5th survey data that obtained of step is obtained with second step respectively is analyzed, weighs the development height of mining induced fissure different time after back production with the 3rd step to the water leakage intensity of variation in the 5th step;
The 7th step: mining induced fissure development height and the final mining induced fissure development height match mining induced fissure law of development model of surveying according to second step to the 5th step and predict the back production different time after the development height of mining induced fissure: the growth of mining induced fissure has a limiting value, this limiting value can be represented with final mining induced fissure development height, with time is independent variable, mining induced fissure development height with the different time correspondence is a strain capacity, with final mining induced fissure development height is the limit, can simulate the time dependent relation equation of mining induced fissure development height, the mining induced fissure development height of prediction different time.
Time in above-mentioned the 7th step, to be back production adopted the later time of line to stopping, with back production to the back production line as zero point.
The time dependent relation equation of mining induced fissure development height in the 7th above-mentioned step is:
In the formula: H represents that mining induced fissure is for height;
T represents elapsed time after the back production of measuring point coal seam;
T
1Represent the 1st layer of disrumpent feelings time of competent bed;
T
iRepresent the disrumpent feelings time of i layer competent bed;
T
nRepresent the disrumpent feelings time of n layer competent bed;
N represents the quantity of competent bed in the target coal seam overlying strata.
Compared with prior art, the present invention can improve present situation at high-order gas pumping cloth hole blindness, life-span weak point, inefficiency, increases cloth hole reasonability, prolongs the extraction time; Help scientifically formulating exploitation system under the water body, reduce the possibility of water body water outlet; Reduce coal back production and gas pumping cost, improve business efficiency.
The specific embodiment
Below the present invention is described in detail.
Concrete technological process of the present invention is as follows:
The first step: detection bore position, parameter and quantity thereof that design needs.
Select suitable position construction to survey according to conditions down-hole and bore nest, be typically chosen near the back production line of design, vertical plane with back production line place is a detected object, assurance has time enough to finish drilling construction and detection mission, guarantees to have to finish the required rig of detection mission, electric power, hydraulic pressure and space; According to the performance of the position of boring nest, rig and aperture, length, orientation and the elevation angle that needs the distance and bearing design detection boring of the detection of a target, generally speaking, all borings are all parallel with the working face extraction direction, reducing the boring workload, boring length is stopped adopting the line correspondence position and is as the criterion to reach; 5 borings of general minimum design are surveyed needs to satisfy, and the inclination angle is spent to 60 degree from 20.
Second step: survey boring in back production construction before stop adopting line, carry out taking turns water-leaking property after finishing immediately and detect also record data.
Before the back production line is not arrived in back production, once be not subjected to cover on mining influence original the water leakage of each rock stratum, with reference as the later analysis contrast; Consider in the boring complex situations to occur, must in exploration hole, monitor immediately and record.
The 3rd step: to survey boring carry out through hole processing to stopping adopting line after 10 days in back production, carry out second after finishing immediately and take turns water-leaking property detection and record data.
After after a while, complex situations such as piece may appear in the boring being out of shape, falling, must carry out through hole before being lowered to detecting devices handles, after finishing, through hole detects immediately and record data, avoid to finish and survey or complex situations such as detecting loss equipment occur, if can not through hole then must consider to construct to remedy and hole and monitor and record.
The 4th step: to survey boring carry out through hole processing to stopping adopting line after 20 days in back production, carry out the third round water-leaking property after finishing immediately and detect and record data.
The 5th step: to survey boring carry out through hole processing to stopping adopting line after 30 days in back production, carry out the four-wheel water-leaking property after finishing immediately and detect and record data.
The 6th step: with the vertical height is standard criterion detection data, the 3rd step to the survey data that the 5th survey data that obtained of step is obtained with second step respectively is analyzed, weighs the development height of mining induced fissure different time after back production with the 3rd step to the water leakage intensity of variation in the 5th step.
The unified in vertical direction data that detect, with the foundation of relative water leakage as the mining induced fissure development height, the big more explanation mining induced fissure of water leakage is educated all the more relatively.Because each exploration hole all has certain inclination angle, the data of surveying can not be used for directly contrasting, so at first the survey data must be converted on the vertical distance of measuring point apart from basic point by hole depth, the general selection laid the platform end face of rig as basic point.The development height of weighing mining induced fissure with relative water leakage can be avoided the false appearance of leaking that causes because of lithology.
The 7th step: mining induced fissure development height and the final mining induced fissure development height match mining induced fissure law of development model of surveying according to second step to the 5th step and predict the back production different time after the development height of mining induced fissure.
According to theory analysis, the growth of mining induced fissure has a limiting value, this limiting value can be represented with final mining induced fissure development height, be independent variable with time, be strain capacity, be the limit with final mining induced fissure development height with the mining induced fissure development height of different time correspondence, can simulate the time dependent relation equation of mining induced fissure development height, as forecast model, can predict the mining induced fissure development height of different time with this equation.Here the said time is meant that back production adopts the later time of line to stopping, with back production to the back production line as zero point.
Time in above-mentioned the 7th step, to be back production adopted the later time of line to stopping, with back production to the back production line as zero point.
The time dependent relation equation of mining induced fissure development height in the 7th above-mentioned step is:
In the formula: H represents that mining induced fissure is for height;
T represents elapsed time after the back production of measuring point coal seam;
T
1Represent the 1st layer of disrumpent feelings time of competent bed;
T
iRepresent the disrumpent feelings time of i layer competent bed;
T
nRepresent the disrumpent feelings time of n layer competent bed;
N represents the quantity of competent bed in the target coal seam overlying strata.
The technology of the present invention is the leak hunting functional exploitation of technology of former subsection water injection, segmentation, by quick, the high accuracy and the low advantage of cost of former technology, for accurately survey and the prediction back production after the development height of different time mining induced fissure direct detection method is provided.This technical application is strong, and principle is simple, is easy to grasp and utilize.
Claims (3)
1. the dynamic testing method of a mine mining induced fissure, it is characterized in that: described method realizes by following steps:
The first step: bore position, parameter and quantity thereof are surveyed in design: survey the boring design near the back production line, vertical plane with back production line place is a detected object, all borings are all parallel with the working face extraction direction, boring length is stopped adopting the line correspondence position and is as the criterion to reach, 5 borings of minimum design, survey needs to satisfy, the inclination angle is spent to 60 degree from 20;
Second step: survey boring in back production construction before stop adopting line, carry out first round water-leaking property after finishing immediately and detect also record data;
The 3rd step: to survey boring carry out through hole processing to stopping adopting line after 10 days in back production, carry out second after finishing immediately and take turns water-leaking property detection and record data;
The 4th step: to survey boring carry out through hole processing to stopping adopting line after 20 days in back production, carry out the third round water-leaking property after finishing immediately and detect and record data;
The 5th step: to survey boring carry out through hole processing to stopping adopting line after 30 days in back production, carry out the four-wheel water-leaking property after finishing immediately and detect and record data;
The 6th step: with the vertical height is standard criterion detection data, the survey data are converted on the vertical distance of measuring point apart from basic point by hole depth, selection is laid the platform end face of rig as basic point, the 3rd step to the survey data that the 5th survey data that obtained of step is obtained with second step respectively is analyzed, weighs the development height of mining induced fissure different time after back production with the 3rd step to the water leakage intensity of variation in the 5th step;
The 7th step: mining induced fissure development height and the final mining induced fissure development height match mining induced fissure law of development model of surveying according to second step to the 5th step and predict the back production different time after the development height of mining induced fissure: the growth of mining induced fissure has a limiting value, this limiting value can be represented with final mining induced fissure development height, with time is independent variable, mining induced fissure development height with the different time correspondence is a strain capacity, with final mining induced fissure development height is the limit, can simulate the time dependent relation equation of mining induced fissure development height, the mining induced fissure development height of prediction different time.
2. the dynamic testing method of mine mining induced fissure according to claim 1 is characterized in that: the time in described the 7th step, to be back production adopted the later time of line to stopping, with back production to the back production line as zero point.
3. the dynamic testing method of mine mining induced fissure according to claim 1 is characterized in that: the time dependent relation equation of mining induced fissure development height in described the 7th step is:
In the formula: H represents that mining induced fissure is for height;
T represents elapsed time after the back production of measuring point coal seam;
T
1Represent the 1st layer of disrumpent feelings time of competent bed;
T
iRepresent the disrumpent feelings time of i layer competent bed;
T
nRepresent the disrumpent feelings time of n layer competent bed;
N represents the quantity of competent bed in the target coal seam overlying strata.
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| CN104898178A (en) * | 2015-04-28 | 2015-09-09 | 中国矿业大学 | Measurement device and measurement method for coal seam mining-induced fissure development level |
| CN107448143A (en) * | 2017-06-20 | 2017-12-08 | 清华大学 | Broken rock mass dynamic boring method |
| CN108442917A (en) * | 2017-12-14 | 2018-08-24 | 中国矿业大学 | A kind of roof height of water flowing fractured zone underground continuous real-time monitoring method |
| CN111781657A (en) * | 2020-06-16 | 2020-10-16 | 中煤科工开采研究院有限公司 | Device and method for measuring penetration height of fractured zone |
| CN112612059A (en) * | 2020-12-25 | 2021-04-06 | 中国矿业大学 | Nondestructive detection method for three-dimensional model mining-induced fracture development characteristics |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104898178A (en) * | 2015-04-28 | 2015-09-09 | 中国矿业大学 | Measurement device and measurement method for coal seam mining-induced fissure development level |
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| CN107448143B (en) * | 2017-06-20 | 2019-05-10 | 清华大学 | Broken rock mass dynamic boring method |
| CN108442917A (en) * | 2017-12-14 | 2018-08-24 | 中国矿业大学 | A kind of roof height of water flowing fractured zone underground continuous real-time monitoring method |
| CN111781657A (en) * | 2020-06-16 | 2020-10-16 | 中煤科工开采研究院有限公司 | Device and method for measuring penetration height of fractured zone |
| CN112612059A (en) * | 2020-12-25 | 2021-04-06 | 中国矿业大学 | Nondestructive detection method for three-dimensional model mining-induced fracture development characteristics |
| CN112612059B (en) * | 2020-12-25 | 2023-02-28 | 中国矿业大学 | Nondestructive detection method for three-dimensional model mining-induced fracture development characteristics |
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