CN103362551A - Comprehensive index evaluating method for rock burst - Google Patents
Comprehensive index evaluating method for rock burst Download PDFInfo
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- CN103362551A CN103362551A CN 201310309908 CN201310309908A CN103362551A CN 103362551 A CN103362551 A CN 103362551A CN 201310309908 CN201310309908 CN 201310309908 CN 201310309908 A CN201310309908 A CN 201310309908A CN 103362551 A CN103362551 A CN 103362551A
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Abstract
The invention discloses a comprehensive index evaluating method for rock burst. The method comprises the following steps of evaluating weights to rock burst by geological and mining factors in a mining area through comprehensive analysis; respectively calculating danger indexes of the weights, and taking the maximum value as the final danger comprehensive index for rock burst; and thus determining the danger class, state and preventing policy for rock burst in the mining area. The comprehensive index evaluating method for rock burst disclosed by the invention is an advanced evaluating and predicting method which is simple and easy to operate and use. The danger level and class for rock burst can be determined by just analyzing the geological and mining factors in the mining area, and then, related monitoring and preventing preparation for rock burst can be made in advance according to the predetermined preventing policy, so that the safety level of mine production is enhanced.
Description
Technical field
The present invention relates to a kind of composite index appraisal procedure of impulsion pressure, belong to coal mining and safety of coal mines technology.
Background technology
Gradually increasing along with China's pit mining degree of depth and limit of mining, coal rock dynamic disaster take impulsion pressure as representative is more and more serious, the elastic energy that this dynamic disaster will accumulate in the coal and rock discharges with unexpected, rapid, fierce form, cause the coal and rock vibration limits, power is thrown to roadway with coal petrography, send the strong sound, cause the destruction of support and equipment, roadway and personnel's injures and deaths etc., impulsion pressure has paroxysmal characteristics, usually is difficult to predict in advance the when and where of its generation.The at present research for impulsion pressure mainly concentrates on three research aspects, and the one, the research of impulsion pressure (rock burst) genesis mechanism; The 2nd, the research of Hazards of Rock Burst assessment, monitoring and prediction technology; The 3rd, the research of impulsion pressure control measures.Wherein, the mechanism that impulsion pressure occurs is prediction and the basis of taking prophylactico-therapeutic measures, and assessment of risks, monitoring and prediction then are to prevent and treat the key link that disaster occurs.
Yet, whether need to take or need which kind of monitoring and forecasting forecast and control measure for a certain production zone, whether then need to assess in advance this zone has the danger that impulsion pressure occurs or has which kind of Hazards of Rock Burst grade, but the reason that impulsion pressure occurs is complicated, influence factor influence degree numerous and every kind of factor impact ore deposit pressure danger is different, simple analyze some or certain several factor and tend to cause complete with inclined to one side lid or miss the consequence of principal element, or hold inaccurate to the influence degree of a certain factor, thereby cause the inaccurate of analysis result, only have by analyzing and screen the major influence factors of Hazards of Rock Burst, and the reasonable weighing factor of definite these factors, then it is integrated and analyze, could improve the predictablity rate of Hazards of Rock Burst, formulate targetedly Preventing Countermeasures according to the horizontal grade of different Hazards of Rock Bursts again, thereby reach the purpose that effectively instructs impulsion pressure disaster monitoring and improvement.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides the composite index appraisal procedure that press in a kind of look-ahead mine, exploiting field, work plane or roadway bump ore deposit, give birth to the weight of impact by analysis-by-synthesis assessment Geology and mining class factor impact ore deposit Hair Fixer, determine Hazards of Rock Burst grade and the Preventing Countermeasures of production zone.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
The impulsion pressure influence factor is numerous, have geology, mining with the organization and administration aspect.The impact of organization and administration factor is cast aside in this case, mainly considers the impact that Geology factor and mining factor impact ore deposit pressure cause.
In the Geology factor, pressed if the overbump ore deposit once occurs certain mine, can show that then this mine possesses the sufficient and necessary condition that impulsion pressure occurs, frequency is more, and then Hazards of Rock Burst is higher; Mining depth is larger, and then surrouding rock stress level and Hazards of Rock Burst are higher; On to cover in the fissure zone hard and thick stratum nearer apart from the distance in coal seam, the impact that press in the vibrations impact ore deposit that then produces during the movement of roof fracture is larger; Coal seam top 100m scope roof strata thickness characteristics is more obvious, then stores and to discharge the ability of elastic energy stronger, and the impact ore deposit presses dangerous impact larger; The stress increment that structure causes in the production zone is higher, and the impact that press in the impact ore deposit is larger; The uniaxial compressive strength of coal is higher, and the integrality of coal body is better, the easier impact failure of coal body; The elastic energy index of coal is larger, and the ability intensity stronger, impact failure of its storage elasticity energy is larger.
In mining class factor, if carry out in advance the topping exploitation, can reduce Hazards of Rock Burst, if the release degree of topping is higher, then Hazards of Rock Burst is lower; If the coal column lower zone exploitation of leaving in the exploitation of upper topping, then from the horizontal range of coal column more close to, then Hazards of Rock Burst is higher; If work plane is entity coal work plane, then low than the work plane Hazards of Rock Burst that closes on the goaf, if be island working face then Hazards of Rock Burst is high; Can cause the concentrated stress stack that two ends turning coal column produces if face length is too small, cause that Hazards of Rock Burst rises; If the section coal pillar width stays and establishes unreasonablely, then can produce the situation that stress excessively raises, increase Hazards of Rock Burst; If ground coal is left in the tunnel, then can under the effect of horizontal stress, produce end distension impact failure; When tunnel, work plane to the goaf, tomography, when corroding, closing layer or varied in thickness zone driving or back production to oblique, anticline, coal seam, can cause the stack of advance support stress and edge, goaf concentrated stress or tectonic stress, the danger that will increase impulsion pressure.
Based on above-mentioned analysis, the composite index appraisal procedure of the impulsion pressure that this case provides comprises the steps:
(1) the Geology influence factor kind W in the analysis impulsion pressure influence factor
Gi, determine the greatest danger index R of various types of geological factors affecting
MgiWith actual danger index R
Gi, the Hazards of Rock Burst index of calculating Geology influence factor
(2) the mining class influence factor kind W in the analysis impulsion pressure influence factor
Mj, determine the greatest danger index R of various types of mining influence factor
MmjWith actual danger index R
Mj, the Hazards of Rock Burst index of calculating mining class influence factor
(3) determine that final Hazards of Rock Burst composite index is W
t=max{W
T1, W
T2;
(4) Hazards of Rock Burst composite index W
tBe worth highlyer, the Hazards of Rock Burst grade of production zone is higher.
Concrete, described Geology influence factor comprises: W
G1: impulsion pressure occurs historical; W
G2: mining depth; W
G3: hard and thick stratum is apart from the distance in coal seam; W
G4: roof strata thickness characteristics parameter; W
G5: tectonic stress; W
G6: the uniaxial compressive strength of coal; W
G7: the elastic energy index of coal.
Concrete, described mining class influence factor comprises: W
M1: the release degree of topping; W
M2: the horizontal range of the coal column that the upper topping exploitation of work plane distance is left over; W
M3: work plane and the relation of closing on the goaf; W
M4: face length; W
M5: the section coal pillar width; W
M6: the coal thickness of keeping on file; W
M7: to the tunnel of goaf driving, the distance of stopping digging position and goaf; W
M8: to the work plane of goaf propelling, stop adopting the distance in line and goaf; W
M9: to work plane or the tunnel that drop advances greater than the tomography of 3m, work plane or the distance with tomography of meeting head on; W
M10: to seam inclination acute variation (＞15 °) to work plane or tunnel that oblique or anticline advances, work plane or with it the distance of meeting head on; W
M11: corrode, close work plane or tunnel that layer or varied in thickness partly advance to the coal seam, the distance of Approaching Coal Seam changing unit.
Preferably, the hazard index of various types of geological factors affecting and various types of geological factors affecting is divided into four grades, is followed successively by from low to high 0,1,2,3; Wherein, not impact is pressed in 0 expression impact ore deposit, and press a little less than the influence degree in 1 expression impact ore deposit, and 2 expression impact ore deposits press influence degree medium, and the influence degree chamber is pressed in 3 expression impact ore deposits.
The prediction essence that the impulsion pressure disaster occurs is the estimation to the probability of happening size, should give up the sort of prediction impulsion pressure and occur or do not occur with the two-stage system way of thinking in absolute terms, and this case is in step (4), according to Hazards of Rock Burst composite index W
tDetermine the Hazards of Rock Burst grade of production zone and the Preventing Countermeasures of corresponding danger classes, be specially: work as W
t≤ 0.25 o'clock, danger classes was A, and precarious position is without dangerous; As 0.25＜W
t≤ 0.5 o'clock, danger classes was B, and precarious position is weak danger; As 0.5＜W
t≤ 0.75 o'clock, danger classes was C, and precarious position is moderate risk; Work as W
t＞0.75 o'clock, danger classes was D, and precarious position is strong dangerous.
Beneficial effect: the composite index appraisal procedure of impulsion pressure provided by the invention, it is a kind of simple, easy to operate and in advance assessment Forecasting Methodology of using, only need just can determine its Hazards of Rock Burst level and grade by Geology factor and the exploitation class factor of analyzing production zone, again according to predetermined Preventing Countermeasures, can carry out in advance the relevant Supervise prevention and cure of impulsion pressure and prepare, promote the level of security that mine is produced.
The specific embodiment
Below in conjunction with example the present invention is further described.
A kind of composite index appraisal procedure of impulsion pressure comprises the steps:
(1) the Geology influence factor kind W in the analysis impulsion pressure influence factor
Gi, determine the greatest danger index R of various types of geological factors affecting
MgiWith actual danger index R
Gi, the Hazards of Rock Burst index of calculating Geology influence factor
(2) the mining class influence factor kind W in the analysis impulsion pressure influence factor
Mj, determine the greatest danger index R of various types of mining influence factor
MmjWith actual danger index R
Mj, the Hazards of Rock Burst index of calculating mining class influence factor
(3) determine that final Hazards of Rock Burst composite index is W
t=max{W
T1, W
T2;
(4) according to Hazards of Rock Burst composite index W
tDetermine the Hazards of Rock Burst grade of production zone and the Preventing Countermeasures of corresponding danger classes.
In the described step (1), the hazard index rank division method of the kind of Geology influence factor, all kinds of geological factors affecting is as shown in table 1.
The Hazards of Rock Burst Index Assessment table of table 1 Geology factor affecting
In the described step (2), the kind of mining class influence factor, the hazard index rank division method of all kinds of mining influence factors are as shown in table 2.
The Hazards of Rock Burst Index Assessment table of table 2 mining class factor affecting
In the described step (4), according to Hazards of Rock Burst composite index W
tThe method of the Hazards of Rock Burst grade of division production zone and the Preventing Countermeasures of corresponding danger classes are as shown in table 3.
Table 3 Hazards of Rock Burst composite index, grade, state and Preventing Countermeasures table
Below in conjunction with embodiment the present invention is made further instructions.
For given a certain production zone, the first step is at first to analyze geological conditions, determines the occurrence condition of Geology influence factor and all kinds of geological factors affecting reality listed in its table 1 that has, calculates the Hazards of Rock Burst index W of Geology influence factor again
T1Second step is to analyze mining condition, determines the occurrence condition of mining class influence factor listed in its table 2 that has and all kinds of mining influence factor reality, calculates the Hazards of Rock Burst index W of mining class influence factor again
T2The 3rd step was comparison W
T1And W
T2, get wherein large value as final Hazards of Rock Burst composite index W
tThe 4th step was to determine W according to table 3
tThe interval that is located, and determine according to this Preventing Countermeasures of Hazards of Rock Burst grade and corresponding danger classes.
Take certain exploiting field in certain ore deposit as example, adopt composite index law to determine Hazards of Rock Burst composite index, grade, the state in this exploiting field and the Preventing Countermeasures that need to take.
By analyzing the geological conditions in this exploiting field, the impact ore deposit presses the Geology factor of impact to mainly contain: mining depth (900～1000m), on cover the physical mechanics attribute (uniaxial compressive strength is greater than 20Mpa, and elastic energy index is greater than 5) of the geological structures (having the tectonic stress increment) such as hard and thick stratum (distance, top plate thickness characteristic ginseng value apart from the coal seam are 86), tomography, coal.According to table 1, through calculating the Hazards of Rock Burst index W by the Geology factor affecting
T1=0.76, be shown in Table 4.
The Hazards of Rock Burst Index Assessment table of certain exploiting field Geology factor affecting of table 4
By analyzing the mining condition in this exploiting field, the impact ore deposit presses the mining class factor of impact to mainly contain: work plane closes on goaf (side can occur and adopt empty work plane), face length (200～270m), the position relationship (tunnel, work plane needed tomography, to oblique tectonic province and Coal Seam Thickness Change zone) of work plane and structure realm is adopted, dug to coal pillar width (5m).According to table 2, through calculating the Hazards of Rock Burst index W by mining class factor affecting
T2=0.67, be shown in Table 5.
The Hazards of Rock Burst Index Assessment table of certain exploiting field mining class factor affecting of table 5
Compare W
T1And W
T2, obtain final Hazards of Rock Burst composite index:
W
t＝max{W
t1,W
t2}=max{0.76,0.67}=0.76
According to W
tCheck table 3,0.5＜W
t≤ 0.75 o'clock, danger classes was C, and precarious position is moderate risk.
The above only is preferred embodiment of the present invention; be noted that for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. the composite index appraisal procedure of an impulsion pressure is characterized in that: comprise the steps:
(1) the Geology influence factor kind W in the analysis impulsion pressure influence factor
Gi, determine the greatest danger index R of various types of geological factors affecting
MgiWith actual danger index R
Gi, the Hazards of Rock Burst index of calculating Geology influence factor
(2) the mining class influence factor kind W in the analysis impulsion pressure influence factor
Mj, determine the greatest danger index R of various types of mining influence factor
MmjWith actual danger index R
Mj, the Hazards of Rock Burst index of calculating mining class influence factor
(3) determine that final Hazards of Rock Burst composite index is W
t=max{W
T1, W
T2;
(4) Hazards of Rock Burst composite index W
tBe worth highlyer, the Hazards of Rock Burst grade of production zone is higher.
2. the composite index appraisal procedure of impulsion pressure according to claim 1 is characterized in that:
Described Geology influence factor comprises: W
G1: impulsion pressure occurs historical; W
G2: mining depth; W
G3: hard and thick stratum is apart from the distance in coal seam; W
G4: roof strata thickness characteristics parameter; W
G5: tectonic stress; W
G6: the uniaxial compressive strength of coal; W
G7: the elastic energy index of coal;
Described mining class influence factor comprises: W
M1: the release degree of topping; W
M2: the horizontal range of the coal column that the upper topping exploitation of work plane distance is left over; W
M3: work plane and the relation of closing on the goaf; W
M4: face length; W
M5: the section coal pillar width; W
M6: the coal thickness of keeping on file; W
M7: to the tunnel of goaf driving, the distance of stopping digging position and goaf; W
M8: to the work plane of goaf propelling, stop adopting the distance in line and goaf; W
M9: to work plane or the tunnel that drop advances greater than the tomography of 3m, work plane or the distance with tomography of meeting head on; W
M10: to the seam inclination acute variation to work plane or tunnel that oblique or anticline advances, work plane or with it the distance of meeting head on; W
M11: corrode, close work plane or tunnel that layer or varied in thickness partly advance to the coal seam, the distance of Approaching Coal Seam changing unit.
3. the composite index appraisal procedure of impulsion pressure according to claim 1, it is characterized in that: the hazard index of various types of geological factors affecting and various types of geological factors affecting is divided into four grades, is followed successively by from low to high 0,1,2,3; Wherein, not impact is pressed in 0 expression impact ore deposit, and press a little less than the influence degree in 1 expression impact ore deposit, and 2 expression impact ore deposits press influence degree medium, and the influence degree chamber is pressed in 3 expression impact ore deposits.
4. the composite index appraisal procedure of impulsion pressure according to claim 1 is characterized in that: in the described step (4), according to Hazards of Rock Burst composite index W
tDetermine the Hazards of Rock Burst grade of production zone, be specially: work as W
t≤ 0.25 o'clock, danger classes was A, and precarious position is without dangerous; As 0.25＜W
t≤ 0.5 o'clock, danger classes was B, and precarious position is weak danger; As 0.5＜W
t≤ 0.75 o'clock, danger classes was C, and precarious position is moderate risk; Work as W
t＞0.75 o'clock, danger classes was D, and precarious position is strong dangerous.
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| CN104653226A (en) * | 2014-12-26 | 2015-05-27 | 中国矿业大学 | Stress-gradient-based method for dividing coal impact ground pressure danger area |
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| CN107991185A (en) * | 2017-11-27 | 2018-05-04 | 中南大学 | A kind of Rock burst proneness Grade Judgment based on rock material peak value elastic energy index |
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| CN104653226A (en) * | 2014-12-26 | 2015-05-27 | 中国矿业大学 | Stress-gradient-based method for dividing coal impact ground pressure danger area |
| CN105257339A (en) * | 2015-11-16 | 2016-01-20 | 北京安科兴业科技股份有限公司 | Multi-parameter integrated monitoring and early-warning method for excavation working face |
| CN105785471A (en) * | 2016-02-14 | 2016-07-20 | 辽宁工程技术大学 | Impact danger evaluation method of mine pre-exploiting coal seam |
| CN107991184A (en) * | 2017-11-27 | 2018-05-04 | 中南大学 | A kind of Rock burst proneness Grade Judgment based on residual elasticity strain energy index |
| CN107991185A (en) * | 2017-11-27 | 2018-05-04 | 中南大学 | A kind of Rock burst proneness Grade Judgment based on rock material peak value elastic energy index |
| AU2018330958B2 (en) * | 2018-01-31 | 2019-10-31 | China University Of Mining And Technology | Method for rock burst prevention by active support reinforcement and active pressure relief |
| WO2019148788A1 (en) * | 2018-01-31 | 2019-08-08 | 中国矿业大学 | Method for preventing rock bursts by means of active support reinforcement and active pressure relief |
| US10655465B2 (en) | 2018-01-31 | 2020-05-19 | China University Of Mining And Technology | Method for rock burst prevention by active support reinforcement and active pressure relief |
| CN108871262A (en) * | 2018-03-23 | 2018-11-23 | 长江水利委员会长江科学院 | Great burying cavern extrusion pressing type country rock large deformation method of discrimination |
| CN108871262B (en) * | 2018-03-23 | 2019-06-18 | 长江水利委员会长江科学院 | Great burying cavern extrusion pressing type country rock large deformation method of discrimination |
| CN108843391A (en) * | 2018-05-31 | 2018-11-20 | 天地科技股份有限公司 | A kind of coal seam high-pressure hydraulic evaluation of Fracturing Effect on Compact Sandstone method |
| CN108843391B (en) * | 2018-05-31 | 2020-04-14 | 天地科技股份有限公司 | Method for evaluating high-pressure hydraulic fracturing effect of coal seam |
| CN108960653A (en) * | 2018-07-12 | 2018-12-07 | 煤炭科学技术研究院有限公司 | Multiple dimensioned shock hazard evaluation method based on composite index law |
| CN109447837B (en) * | 2018-11-15 | 2022-05-20 | 国家能源投资集团有限责任公司 | Danger assessment method for rock burst in mining area |
| CN109447837A (en) * | 2018-11-15 | 2019-03-08 | 国家能源投资集团有限责任公司 | A kind of risk assessment method of mining area bump |
| CN109798149A (en) * | 2019-01-28 | 2019-05-24 | 辽宁工程技术大学 | A kind of tight roof high seam stope ground pressure strength grade predicting method |
| CN109798149B (en) * | 2019-01-28 | 2020-06-09 | 辽宁工程技术大学 | Method for predicting inflow intensity of mining field of thick coal seam with hard roof in grading manner |
| CN112012797A (en) * | 2020-09-03 | 2020-12-01 | 兖州煤业股份有限公司 | Evaluation method for coal mine impact danger pressure relief effect |
| CN113339073A (en) * | 2021-07-06 | 2021-09-03 | 中国矿业大学 | Impact risk evaluation method based on roof rock stratum structure |
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Application publication date: 20131023 |