CN110847968A - Periodic pressure-bearing dividing method based on maximum working resistance curve of support cycle - Google Patents
Periodic pressure-bearing dividing method based on maximum working resistance curve of support cycle Download PDFInfo
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- 230000033001 locomotion Effects 0.000 claims abstract description 14
- 238000004364 calculation method Methods 0.000 claims abstract description 12
- 230000001149 cognitive effect Effects 0.000 claims abstract description 6
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- E—FIXED CONSTRUCTIONS
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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Abstract
The invention provides a periodic pressure-bearing dividing method based on a support cycle maximum working resistance curve, which relates to the technical field of mine pressure and comprises the following steps: A. extracting the maximum working resistance of the bracket in each working cycle, determining the top plate area to which the working surface bracket belongs, selecting the maximum working resistance of each bracket in the area, and generating a maximum working resistance cycle curve chart of the top plate area; B. calculating the incoming pressure line of the working face top plate according to an incoming pressure judgment standard calculation formula; C. dividing a pressure-coming interval and a non-pressure-coming interval of a maximum work resistance circulation curve of the support circulation; D. selecting the maximum value of the roof pressure during non-incoming pressure and the maximum value of the roof pressure during incoming pressure in each periodic motion as the roof pressure intensity during non-incoming pressure and incoming pressure respectively, and drawing a roof incoming pressure two-phase curve; E. and optimizing the roof pressure two-phase curve by adopting an isolation and similarity method to generate a roof pressure cognitive curve, wherein the mine pressure analysis result obtained by the method can better meet the roof control requirement.
Description
Technical Field
The invention relates to the technical field of mine pressure, in particular to a periodic pressure-bearing dividing method based on a maximum circulating working resistance curve of a support in an area.
Background
In the process of coal mining, after an underground coal seam is mined, the underground coal seam is influenced by mining, the size and distribution of mine pressure are constantly changed, roadway deformation and support stress are the results of surrounding rock movement, the nature, size and development change rule of stress are more closely inseparable with the movement of an overlying rock stratum, and a roof rock stratum moves periodically according to a certain rule. The periodic movement law of the roof strata is found out, the periodic movement parameters, namely the stable step pitch, the pressure-coming step pitch and the pressure-coming intensity, are accurately calculated, the pressure-coming period law of the roof of the working face is visually displayed, and the method has important guiding significance for the safety production of the coal mine.
At present, a formula calculation method is usually adopted in mining to determine periodic incoming pressure parameters, secondary factors are over simplified or even ignored when a model is established by the formula calculation method, and the theoretical calculation result and field measured data have a large difference due to the complexity of a specific coal mine production environment. In addition, the method of dividing the pressure by the resistance at the end of the working cycle of the stent has improved calculation, but the method of dividing the pressure by the resistance at the end of the working cycle of the single stent can only display the pressure state of a local top plate, and the pressure is divided by the resistance at the end of the working cycle of the single stent, so that the deviation occurs.
Whether the support can normally work to support the top plate when the top plate is pressed is more concerned in the actual production of the coal mine, namely whether the maximum value of the pressing is larger than the rated working resistance of the support, the end resistance of the support circulation is not absolutely the maximum working resistance of the support circulation, and the end resistance of the support circulation is used as a measurement parameter of the pressure intensity of the top plate at the support, so that the support circulation is unreasonable. Therefore, the actual monitoring data of the coal mine are fully utilized, more reasonable parameter standards are selected, reasonable working face pressure measurement areas are divided, the stable step pitch of the periodic motion of the working face and the pressure step pitch are accurately given to guide production, and the method is a problem which needs to be solved urgently in coal mine production.
Disclosure of Invention
In order to fully utilize mine pressure monitoring data, select reasonable parameter standards, accurately give a stable step pitch of periodic motion of a working surface and a step pitch of coming pressure, and effectively guide roof control, the invention provides a periodic coming pressure dividing method based on a maximum working resistance curve of support circulation, and the specific technical scheme is as follows.
A periodic pressure-bearing dividing method based on a maximum working resistance curve of a stent cycle comprises the following steps:
A. extracting the maximum working resistance of the bracket in each working cycle from mine pressure monitoring data, determining a top plate area to which the working face bracket belongs, selecting the maximum circulating working resistance of each bracket in the top plate area, and generating a maximum working resistance circulating curve graph of each top plate area;
B. calculating the incoming pressure line of the working face top plate according to an incoming pressure judgment standard calculation formula;
C. dividing a pressure-coming interval and a non-pressure-coming interval of a maximum work resistance circulation curve of the support circulation;
D. selecting the maximum value of the roof pressure during non-incoming pressure and the maximum value of the roof pressure during incoming pressure in each periodic motion as the roof pressure intensity during non-incoming pressure and incoming pressure respectively, and drawing a roof incoming pressure two-phase curve;
E. and optimizing the top plate pressure two-phase curve by adopting an isolation and similarity method to generate a top plate pressure cognitive curve.
Preferably, the mine pressure monitoring data is mine pressure-time data measured by a mine pressure monitoring system, a plurality of adjacent supports are selected from the working surface to serve as 1 support group, and the divided support groups respectively support the roof area.
Preferably, the maximum operational resistance cycle plot is plotted with the regional maximum operational resistance as the ordinate and the cumulative footage as the abscissa.
It is also preferable that the coming pressure discrimination criterion calculation formula is:
wherein: p is the standard value for judging the incoming pressure, and the unit KN;
the calculated mean value of the maximum working resistance of all the regions in circulation is the unit KN; sigmapCirculating the mean square error of the maximum working resistance for all the top plate areas; m is the average coefficient of the maximum circulating working resistance of all the areas; n is the mean square error coefficient of the maximum working resistance of all the region cycles.
It is also preferable that the incoming pressure interval is an interval higher than an incoming pressure determination criterion value, and the non-incoming pressure interval is an interval lower than the incoming pressure determination criterion value.
It is also preferable that the ceiling pressure two-phase curve has a ceiling pressure intensity as an ordinate and an integrated footage as an abscissa.
Preferably, the top plate pressure-incoming two-phase curve is optimized by regarding a single-value high-pressure abnormal point as a pressure-developing normal point and regarding two or more continuous high-pressure points as top plate pressure-incoming.
The method has the beneficial effects that the maximum working resistance of the bracket is extracted by using the mine pressure monitoring data, so that whether the bracket can normally work to support the roof when the roof is pressed can be better judged; the working surface support is divided into regions, the maximum working resistance of the regions is calculated, a curve of the maximum working resistance of the region circulation is generated, a standard pressure value is used as a boundary, the stable step pitch of the periodic motion of the working surface and the step pitch of the pressure are accurately given, the curve of the maximum working resistance of the support circulation is divided into a pressure coming region and a pressure non-coming region, the pressure intensity in the pressure coming region and the pressure intensity in the pressure non-coming region are calculated, a two-phase curve of the pressure coming from the top plate is generated, and a cognitive curve of the pressure coming from the top plate is generated by further processing an isolated high-pressure point in the two-phase curve of the pressure coming from the top plate, so that the periodic pressure coming rule can be analyzed more visually, and the calculation result is.
Drawings
FIG. 1 is a flowchart of a periodic load bearing segmentation method based on a stent cyclic maximum working resistance curve;
FIG. 2 is a comparison graph of data processing curves in an exemplary embodiment;
fig. 3 is a data processing diagram in the process of generating the pressure-sensitive cognitive curve.
Detailed Description
Referring to fig. 1 and 3, the embodiment of the periodic pressure-based segmentation method based on the maximum working resistance curve of the stent cycle provided by the invention is as follows.
In the process of coal mining, whether the maximum value of the top plate pressure is larger than the rated working resistance of the support or not needs to be considered in order to ensure that the support effectively supports the top plate, but the end resistance of the support circulation is not the maximum working resistance of the support circulation, and the end resistance of the support circulation cannot be used as a measurement parameter of the top plate pressure intensity at the support.
A periodic pressure-bearing dividing method based on a maximum working resistance curve of a bracket cycle, namely a mine pressure large value method, as shown in figure 1, comprises the following specific steps:
and A.
And extracting the maximum working resistance of the bracket in each working cycle from the mine pressure monitoring data, determining the top plate area to which the working face bracket belongs, selecting the maximum circulating working resistance of each bracket in the top plate area, and generating a maximum working resistance circulating curve graph of each top plate area.
The mine pressure monitoring data is mine pressure-time data measured by a mine pressure monitoring system, a plurality of adjacent supports are selected in the working face to serve as 1 support group, and the number of the known supports in the support group is determined according to the actual number of the supports on the working face and the size of the working face. The divided support groups respectively support the top plate area, and the working surface top plate is divided into a plurality of top plate areas according to the division of the support groups. The maximum working resistance cycle curve chart takes the maximum working resistance of the area as the ordinate and the accumulated footage as the abscissa. In addition, the mine pressure monitoring system monitors mine pressure parameters, including the monitoring of working resistance, roof separation, surrounding rock stress, anchor bolt support stress, drilling stress and other multi-parameter.
And when the maximum working resistance of the stent in each cycle is extracted, calculating the average value of the maximum working resistance of all the stents in the region according to the divided regions, and taking the average value as the maximum working resistance of the region in the cycle.
And B, step B.
And calculating the incoming line of the working face top plate according to an incoming pressure judgment standard calculation formula, wherein the incoming line of the working face top plate is the incoming pressure judgment standard value, and the incoming pressure standard value is taken as a limit to accurately give the stable step pitch of the periodic motion of the working face and the incoming pressure step pitch.
The calculation formula of the pressure judging standard is as follows:
wherein: p is the standard value for judging the incoming pressure, and the unit KN;
the calculated mean value of the maximum working resistance of all the regions in circulation is the unit KN; sigmapCirculating the mean square error of the maximum working resistance for all the top plate areas; m is the average coefficient of the maximum circulating working resistance of all the areas; n is the mean square error coefficient of the maximum working resistance of all the region cycles.
And C, performing step C.
And dividing the incoming pressure interval and the non-incoming pressure interval according to the maximum work resistance circulation curve of the support circulation.
The coming-pressure interval is an interval higher than the coming-pressure judgment standard value, and the non-coming-pressure interval is an interval lower than the coming-pressure judgment standard value. When the pressure is divided, the curve of the maximum working resistance of the area cycle is divided into 2 sections of pressure and non-pressure along the direction of the horizontal axis.
And D, step D.
And selecting the maximum value of the pressure of the top plate in non-incoming pressure and the maximum value of the pressure of the top plate in incoming pressure in each periodic motion as the pressure intensity of the top plate in non-incoming pressure and incoming pressure respectively, and drawing a two-phase curve of the incoming pressure of the top plate. The top plate pressure two-phase curve takes the pressure intensity of the top plate as a vertical coordinate and takes the accumulated footage as a horizontal coordinate.
And E, step E.
And optimizing the top plate pressure two-phase curve by adopting an isolation and similarity method to generate a top plate pressure cognitive curve, as shown in figure 2.
The optimization of the top plate pressure-incoming two-phase curve is specifically that a single-value high-pressure abnormal point is regarded as a pressure appearance normal point, and more than two continuous high-pressure points are regarded as the top plate pressure-incoming. As shown in fig. 3, the high points of the type are removed from the partial abnormal high points of the pressure, the partial abnormal high points of the pressure are regarded as normal pressure, and the continuous high points are integrally regarded as high pressure in the pressure-coming interval, so that the stable step pitch and the pressure-coming step pitch of the periodic motion of the working surface can be accurately given.
Compared with the traditional periodic pressure-bearing method divided by the resistance at the end of the support cycle, the periodic pressure-bearing dividing method based on the curve of the maximum working resistance of the support cycle in the region focuses more on the maximum ore-bearing pressure value, and the analysis conclusion can better meet the requirement of roof control information; compared with a method for calculating the division period incoming pressure by a formula, the method makes up the influence of larger errors caused by over-simplification of the actual complex geology and mining conditions of the coal mine by formula calculation. The mine pressure large value method is intuitive and accurate in pressure division, and provides new information support for roof management of the working face.
In actual production, whether the support can normally work to support the top plate when the top plate is pressed is more concerned, namely whether the maximum value of the pressing is larger than the rated working resistance of the support, the end resistance of the support circulation is not absolutely the maximum working resistance of the support circulation, and the end resistance of the support circulation is used as a measurement parameter of the pressure intensity of the top plate at the support and is unreasonable. Therefore, the actual monitoring data of the coal mine are fully utilized, more reasonable parameter standards are selected, reasonable working face pressure measurement areas are divided, the stable step pitch of the periodic motion of the working face and the pressure step pitch are accurately given to guide production, and the method is a problem which needs to be solved urgently in coal mine production.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (7)
1. A periodic pressure-bearing dividing method based on a maximum working resistance curve of a stent cycle is characterized by comprising the following steps:
A. extracting the maximum working resistance of the bracket in each working cycle from mine pressure monitoring data, determining a top plate area to which the working face bracket belongs, selecting the maximum circulating working resistance of each bracket in the top plate area, and generating a maximum working resistance circulating curve graph of each top plate area;
B. calculating the incoming pressure line of the working face top plate according to an incoming pressure judgment standard calculation formula;
C. dividing a pressure-coming interval and a non-pressure-coming interval of a maximum work resistance circulation curve of the support circulation;
D. selecting the maximum value of the roof pressure during non-incoming pressure and the maximum value of the roof pressure during incoming pressure in each periodic motion as the roof pressure intensity during non-incoming pressure and incoming pressure respectively, and drawing a roof incoming pressure two-phase curve;
E. and optimizing the top plate pressure two-phase curve by adopting an isolation and similarity method to generate a top plate pressure cognitive curve.
2. The periodic incoming pressure dividing method based on the maximum working resistance curve of the support cycle as claimed in claim 1, wherein the mine pressure monitoring data is mine pressure-time data measured by a mine pressure monitoring system, a plurality of adjacent supports are selected from a working surface as 1 support group, and the divided support groups respectively support a roof area.
3. The periodic pressure-based dividing method based on the stent cyclic maximum working resistance curve is characterized in that the maximum working resistance cyclic graph takes the regional maximum working resistance as the ordinate and the cumulative footage as the abscissa.
4. The periodic pressure-coming dividing method based on the curve of the maximum working resistance of the stent cycle according to claim 1, wherein the pressure-coming discrimination criterion is calculated by the formula:
wherein: p is the standard value for judging the incoming pressure, and the unit KN;the calculated mean value of the maximum working resistance of all the regions in circulation is the unit KN; sigmapCirculating the mean square error of the maximum working resistance for all the top plate areas; m is the average coefficient of the maximum circulating working resistance of all the areas; n is the mean square error coefficient of the maximum working resistance of all the region cycles.
5. The periodic pressure-applying dividing method based on the curve of maximum working resistance of stent cycle according to claim 1, wherein the pressure-applying interval is an interval higher than a pressure-applying criterion value, and the non-pressure-applying interval is an interval lower than a pressure-applying criterion value.
6. The method according to claim 1, wherein the top board pressure-bearing two-phase curve is plotted with the top board pressure intensity as ordinate and the cumulative footage as abscissa.
7. The periodic pressure-applying dividing method based on the curve of the maximum working resistance of the stent cycle as claimed in claim 1, wherein the top plate pressure-applying two-phase curve is optimized by regarding a singular high pressure abnormal point as a pressure developing normal point and regarding two or more consecutive high pressure points as top plate pressure-applying points.
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Cited By (5)
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| CN111681125A (en) * | 2020-07-08 | 2020-09-18 | 神华神东煤炭集团有限责任公司 | Top plate pressure calculation method, storage medium, and electronic apparatus |
| CN113027532A (en) * | 2021-03-31 | 2021-06-25 | 山东思科赛德矿业安全工程有限公司 | Method for mining pressure information based on fully-mechanized mining support working resistance data |
| CN115840901A (en) * | 2022-11-03 | 2023-03-24 | 中国矿业大学 | Working face pressure-coming characteristic analysis method based on support resistance continuity classification |
| CN116342085A (en) * | 2023-03-24 | 2023-06-27 | 尤洛卡（山东）矿业科技有限公司 | Method, device and medium for analyzing period pressure of coal face |
| CN117266936A (en) * | 2023-11-22 | 2023-12-22 | 山东科技大学 | Mining pressure display characteristic monitoring method and device based on support resistance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113027532B (en) * | 2021-03-31 | 2023-01-24 | 山东思科赛德矿业安全工程有限公司 | Method for mining pressure information based on fully-mechanized mining support working resistance data |
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| CN115840901B (en) * | 2022-11-03 | 2023-09-05 | 中国矿业大学 | Working face pressure characteristic analysis method based on stent resistance continuity classification |
| CN116342085A (en) * | 2023-03-24 | 2023-06-27 | 尤洛卡（山东）矿业科技有限公司 | Method, device and medium for analyzing period pressure of coal face |
| CN117266936A (en) * | 2023-11-22 | 2023-12-22 | 山东科技大学 | Mining pressure display characteristic monitoring method and device based on support resistance |
| CN117266936B (en) * | 2023-11-22 | 2024-01-26 | 山东科技大学 | Mining pressure display characteristic monitoring method and device based on support resistance |
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