CN114893233A - Coupling cooperative control method for deep tunnel bolting-grouting support system - Google Patents
Coupling cooperative control method for deep tunnel bolting-grouting support system Download PDFInfo
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- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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Abstract
The invention discloses a coupling cooperative control method for a deep roadway bolting-grouting support system, which is characterized by comprising the following steps of: collecting the stress of grouting anchor rods and grouting anchor cables at two sides, two shoulders and a top plate of a roadway tunneling section, a working face stoping section and a roadway retaining section, carrying out standardized dimensionless processing on monitoring data, respectively calculating a weight value and a comprehensive evaluation index, establishing an average coupling degree model and an average coupling synergy model, and carrying out coupling synergy evaluation on a deep roadway bolting-grouting support system; and optimizing the bolting-grouting support parameters of the tunnel, evaluating the coupling cooperative control of bolting-grouting support systems in different sections of the tunnel, and ensuring the stability of the whole process of the deep tunnel.
Description
Technical Field
The invention relates to the technical field of safety in underground engineering, in particular to a coupling cooperative control method for a deep roadway bolting-grouting support system.
Background
The deep tunnel ground stress is high, the surrounding rock receives stress disturbance and leading pressure influence, and the surrounding rock is loose broken, and self-supporting ability is weak, and the supporting component does not have stable anchor rock stratum, and the supporting component can't exert the support latent energy, causes the tunnel roof to sink, the bottom heave and two group internal extrusions, and the tunnel is out of shape seriously greatly, directly influences tunnel transportation equipment operation, staff's safety and the normal back production of working face.
The grouting anchor rod and the grouting anchor rope are utilized to support weak broken surrounding rocks, cement grout is filled into cracks, the broken rocks are cemented into a whole again, the self-bearing capacity of the surrounding rocks is improved, prestress is applied to the cemented surrounding rocks by the grouting anchor rod and the grouting anchor rope, the active supporting strength of the surrounding rocks is increased, the stability of the roadway is enhanced, the grouting anchor rod and the grouting anchor rope support in a cooperative mode, supporting parameters are optimized, the supporting capacity of the grouting anchor rod and the grouting anchor rope is fully exerted, therefore, the coupling cooperation degree of a deep roadway anchor-grouting supporting system determines the deep roadway anchor-grouting supporting control effect, and the stability of the deep roadway is directly influenced.
The prior art has the following problems:
1. the control condition of the deep anchor-grouting supporting roadway is only evaluated through parameters such as displacement convergence, and the coupling cooperation degree of a grouting anchor rod and a grouting anchor cable of an anchor-grouting supporting system cannot be evaluated;
2. and (4) determining anchor-grouting support parameters in a roadway excavation region, and not dynamically adjusting according to the coupling cooperation degree of the grouting anchor rod and the grouting anchor cable.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a deep roadway bolting-grouting support system coupling cooperative control method.
The technical scheme provided by the invention is as follows: the deep roadway bolting-grouting support system coupling cooperative control method is characterized by comprising the following steps:
a, grouting anchor rods and grouting anchor cables are applied to two sides, two shoulders and a top plate of a driving roadway, grouting anchor rods and grouting anchor cable dynamometers are installed, and the stress of the grouting anchor rods and the grouting anchor cables of the two sides, the two shoulders and the top plate in a driving section, a working face extraction section and a roadway retaining section of the roadway is collected;
b, carrying out standardized dimensionless processing on stress data of the grouting anchor rod and the grouting anchor cable at each position and each interval every day, and calculating the weight values of the grouting anchor rod and the grouting anchor cable in the roadway in a tunneling interval, a working face stoping interval and a roadway retaining interval by using an entropy method;
c, calculating comprehensive evaluation indexes of the grouting anchor rods and the grouting anchor cables in the deep roadway at different moments, different positions and different intervals, and establishing an average coupling degree model of the grouting anchor rods and the grouting anchor cables;
d, establishing a grouting anchor rod and grouting anchor cable average coupling cooperation model, evaluating the coupling cooperation condition of a deep roadway bolting-grouting support system, carrying out comparative analysis on the coupling cooperation degree of a deep roadway tunneling section, a stoping section and a roadway retaining section, adjusting the bolting-grouting support parameters of the deep roadway, and ensuring the stability of the whole process of the deep roadway.
Preferably, the grouting anchor rod and grouting anchor cable dynamometer on the two sides, two shoulders and the top plate of the roadway in the step a are on one monitoring section.
Preferably, in the step b, the stress data of the grouting anchor rod and the grouting anchor cable are subjected to standardized dimensionless processing every day, every position and every interval, and the calculation formula is
Uij is the original stress data of each roadway grouting anchor rod and each grouting anchor cable, each part and each interval, in (uj) is the initial value of each grouting anchor rod and each grouting anchor cable in different intervals at the beginning, max (uj) is the maximum value of each grouting anchor rod and each grouting anchor cable in different intervals, i is the number of monitoring days, and j is the number of grouting anchor rods and each grouting anchor cable in each interval;
the weight values of grouting anchor rods and grouting anchor cables at different parts of the roadway in the tunneling section, the working face stoping section and the entry retaining section are respectively
Ej is entropy values of grouting anchor rods and grouting anchor cables at different positions of a roadway in a tunneling interval, a working face stoping interval and a roadway retaining interval, and m is total days for monitoring;
the entropy values of grouting anchor rods and grouting anchor cables at different parts of the roadway in the tunneling interval, the working face stoping interval and the entry retaining interval are
Kij is the index specific gravity of the roadway grouting anchor rod and the grouting anchor rope every day, every part and every interval;
the index specific gravity of each day, each part and each interval of the roadway grouting anchor rod and the grouting anchor rope is
。
Preferably, the comprehensive evaluation index of the grouting anchor rod in different sections of the roadway in the step c is
The comprehensive evaluation index of the grouting anchor cable in different sections of the roadway is
N total number of grouting anchor cables 。
Preferably, the average coupling degree model of the grouting anchor rod and the grouting anchor cable in the step c is
。
Preferably, the average coupling degree of cooperation model of the grouting anchor rod and the grouting anchor cable in the step d is
Evaluating anchor injection branch of deep tunnelThe protection system is coupled with the cooperative grade, delta and epsilon are importance coefficients, and the importance degrees of a grouting anchor rod and a grouting anchor cable are important.
The invention has the beneficial effects that:
1. evaluating a deep roadway bolting-grouting supporting system by utilizing the average coupling synergy, optimizing roadway bolting-grouting supporting parameters, and fully exerting the supporting potential of a bolting-grouting supporting member under reasonable supporting parameters;
2. and evaluating the coupling cooperative control of the bolting-grouting support system in different intervals of the roadway, analyzing the relationship between the coupling cooperative degree and the safety value in different intervals, and pertinently adjusting the bolting-grouting support parameters in the intervals to ensure the stability of the whole process of the deep roadway.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic diagram of a deep anchor grouting supporting roadway excavation section of the invention;
FIG. 3 is a schematic diagram of a deep-bolting-grouting supporting roadway stoping section of the invention;
fig. 4 is a schematic diagram of a deep-bolting-grouting supporting roadway entry retaining section.
In the figure: the method comprises the following steps of 1 coal seam, 2 working faces, 3 goafs, 4 monitoring sections, 5 tunneling roadways, q tunneling sections, c working face stoping sections and h roadway retaining sections.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, 2, 3 and 4, taking an anchoring and grouting support system of a deep roadway of a coal mine as an example, the anchoring and grouting support system of the deep roadway comprises a coal seam 1 and a gob 3; the deep roadway bolting-grouting support system coupling cooperative control method comprises the following steps:
firstly, grouting anchor rods and anchor cables on two sides, two shoulders and a top plate of a driving tunnel 5, installing grouting anchor rods and anchor cable dynamometers, and collecting the stress of the grouting anchor rods and the anchor cables on two sides, two shoulders and the top plate of a tunneling section q, a stoping section c of a working face 2 and a roadway retaining section h;
after the deep tunnel is excavated, performing anchor-grouting support on the tunnel immediately, mounting a grouting anchor rod and a grouting anchor cable dynamometer on two sides, two shoulders and a top plate of the tunnel, wherein the grouting anchor rod and the grouting anchor cable dynamometer are required to be arranged on a monitoring section 4, and acquiring the stress of the grouting anchor rod and the grouting anchor cable at the same time point every day to ensure the stress time consistency of the grouting anchor rod and the grouting anchor cable;
the whole process of monitoring the stress of a grouting anchor rod and a grouting anchor cable to penetrate through a tunneling roadway 5 is divided into three different sections, namely a roadway tunneling section q is formed by beginning tunneling the roadway to a working face 2 and beginning to recover, a roadway tunneling section c is formed by beginning to recover the working face 2 to a monitoring section, and a roadway is stabilized to a roadway remaining section h after the working face 2 recovers to the monitoring section 4 to the working face 2;
the method comprises the following steps that stress monitoring of a grouting anchor rod and a grouting anchor cable penetrates through the whole process of a roadway, the roadway is divided into three different sections, namely a roadway tunneling section q from the beginning of tunneling to the beginning of mining on a working face, a working face mining section c from the beginning of mining to the beginning of mining on a monitoring section, and the roadway is stabilized to a roadway retaining section h after the mining on the working face reaches the working face;
counting the monitoring data of the grouting anchor rods and the grouting anchor rods, respectively collecting the stress monitoring data of each grouting anchor rod and each grouting anchor cable, and sorting and summarizing the monitoring data of the grouting anchor rods and the grouting anchor cables into three databases according to three sections divided by a roadway to finally form a monitoring data set and a database of the grouting anchor rods and the grouting anchor cables;
the data set and the monitoring data of the grouting anchor rod and the grouting anchor cable in the database are subjected to standardized dimensionless processing, and the calculation formula is
，u ij Monitoring original data of a roadway grouting anchor rod and a grouting anchor cable every day, every part and every interval,in(u j )for each of different intervalsInitial value at the beginning of root slip casting anchor rod and slip casting anchor cable, max (u) j ) The maximum value of each grouting anchor rod and each grouting anchor cable in different intervals, i is the number of monitoring days, and j is the number of the grouting anchor rods and the grouting anchor cables in each interval;
calculating the index specific gravity of the grouting anchor rod and the grouting anchor cable at each position and each interval every day by using the monitoring data of standardized dimensionless processing, wherein the index specific gravity is
，
The method is the sum of dimensionless data of a grouting anchor rod or a grouting anchor cable every day in a certain interval range;
calculating entropy values of the grouting anchor rod and the grouting anchor cable in a roadway q tunneling interval, a working face 2 recovery interval c and a roadway retaining interval h by using index specific gravity of the grouting anchor rod and the grouting anchor cable, wherein the entropy values are
，k ij The specific gravity is the index specific gravity of the grouting anchor rod and the grouting anchor cable;
calculating the weight values of a roadway grouting anchor rod and a grouting anchor cable in a tunneling interval q, a working face stoping interval c and a roadway retaining interval h into entropy values of the grouting anchor rod and the grouting anchor cable
，e j Entropy values of a grouting anchor rod and a grouting anchor cable for the deep roadway;
respectively calculating comprehensive evaluation indexes of grouting anchor rods in different sections of the deep roadway by using the weights and standard dimensionless values of the grouting anchor rods and the grouting anchor cables
In different intervals noteThe comprehensive evaluation index of the slurry anchor cable is as follows
；
The average coupling degree model of the grouting anchor rod and the grouting anchor cable is
，f i For the comprehensive evaluation index of all grouting anchor rods in a certain interval,g i the comprehensive evaluation indexes of all grouting anchor cables in a certain interval are shown, and m is the total number of days for monitoring;
the average coupling degree of synergy model of the grouting anchor rod and the grouting anchor cable is
,δ、εThe undetermined coefficient represents the importance degree of a grouting anchor rod and a grouting anchor cable, and delta + epsilon =1, in a deep roadway anchor grouting support system, the importance degree of the grouting anchor rod and the importance degree of the grouting anchor cable are the same, delta =0.5, and epsilon = 0.5;
evaluating the coupling cooperation grade of a deep roadway anchor-grouting support system by using a grouting anchor rod and grouting anchor cable average coupling cooperation model; when p is more than or equal to 1 and more than or equal to 0.8, the deep roadway bolting-grouting support system is cooperated; when p is more than 0.8 and more than 0.5, the deep roadway bolting-grouting support system is basically cooperated; p is less than 0.5, and the anchor grouting supporting system of the deep roadway is disordered;
comparing and analyzing the coupling cooperation degree of a deep roadway driving section q, a working face 2 stoping section c and a roadway retaining section h by using a grouting anchor rod and grouting anchor cable average coupling cooperation degree model; p is a radical of q ＞p c ＞p h The depth roadway bolting-grouting support system is basically cooperated as a whole when the depth roadway bolting-grouting support system is larger than 0.5, and roadway bolting-grouting support parameters are not required to be adjusted; p is a radical of q ＞p c ＞0.5＞p h， The anchor-grouting support system of the deep roadway tunneling section q and the stoping section c is basically cooperated, the anchor-grouting support system of the roadway h in the roadway-remaining section is out of order, anchor-grouting support parameters of the deep roadway h in the roadway-remaining section are adjusted, and a grouting anchor rod and a grouting anchor rope are additionally arranged; p is a radical of q ＞0.5＞p c ＞p h， The method comprises the following steps that (1) a q-bolting-grouting support system in a deep roadway driving section is basically cooperated, a h-roadway bolting-grouting support system in a stoping section c and a retained section is out of order, the h-deep roadway bolting-grouting support parameters in the stoping section c and the retained section are adjusted, and a grouting anchor rod and a grouting anchor cable are additionally arranged; 0.5 > p q ＞p c ＞p h， The whole deep tunnel anchor-grouting support system is out of order, the whole process anchor-grouting support parameters of the tunnel are adjusted, a grouting anchor rod and a grouting anchor cable are additionally arranged, and the stability of the deep tunnel is guaranteed.
As will be realized, the invention is capable of other embodiments and its several details are capable of modifications in various obvious respects, all without departing from the spirit and essential attributes thereof. All changes which come within the scope of or are equivalent to the scope of the invention are intended to be embraced therein.
Claims (6)
1. The deep roadway bolting-grouting support system coupling cooperative control method is characterized by comprising the following steps:
a, grouting anchor rods and grouting anchor cables are applied to two sides, two shoulders and a top plate of a driving roadway, grouting anchor rods and grouting anchor cable dynamometers are installed, and the stress of the grouting anchor rods and the grouting anchor cables of the two sides, the two shoulders and the top plate in a driving section, a working face extraction section and a roadway retaining section of the roadway is collected;
b, carrying out standardized dimensionless processing on stress data of the grouting anchor rod and the grouting anchor cable at each position and each interval every day, and calculating the weight values of the grouting anchor rod and the grouting anchor cable in the roadway in a tunneling interval, a working face stoping interval and a roadway retaining interval by using an entropy method;
c, calculating comprehensive evaluation indexes of the grouting anchor rods and the grouting anchor cables in the deep roadway at different moments, different positions and different intervals, and establishing an average coupling degree model of the grouting anchor rods and the grouting anchor cables;
d, establishing a grouting anchor rod and grouting anchor cable average coupling cooperation model, evaluating the coupling cooperation condition of a deep roadway bolting-grouting support system, carrying out comparative analysis on the coupling cooperation degree of a deep roadway tunneling section, a stoping section and a roadway retaining section, adjusting the bolting-grouting support parameters of the deep roadway, and ensuring the stability of the whole process of the deep roadway.
2. The deep tunnel bolting-grouting support system coupling cooperative control method according to claim 1, wherein in the step a, grouting anchor rods and grouting anchor cable forcemeters at two sides, two shoulders and a top plate of a tunnel are on one monitoring section.
3. The deep roadway bolting-grouting support system coupling cooperative control method according to claim 1, wherein in the step b, the force data of each day, each part and each interval of the grouting anchor rod and the grouting anchor cable are subjected to standardized dimensionless processing, and the calculation formula is
Uij is the stress original data of each roadway grouting anchor rod and each grouting anchor cable, each part and each interval every day, in (uj) is the initial value of each grouting anchor rod and each grouting anchor cable in different intervals when starting, max (uj) is the maximum value of each grouting anchor rod and each grouting anchor cable in different intervals, i is the number of monitoring days, and j is the number of grouting anchor rods and each grouting anchor cable in each interval;
the weight values of grouting anchor rods and grouting anchor cables at different parts of the roadway in the tunneling section, the working face stoping section and the entry retaining section are respectively
The ej is entropy values of grouting anchor rods and grouting anchor cables at different positions of the roadway in a tunneling interval, a working face stoping interval and a roadway retaining interval, and the m is the total monitoring days;
the entropy values of grouting anchor rods and grouting anchor cables at different parts of the roadway in the tunneling interval, the working face stoping interval and the entry retaining interval are
Kij is the index specific gravity of the roadway grouting anchor rod and the grouting anchor rope every day, every part and every interval;
the index specific gravity of each day, each part and each interval of the roadway grouting anchor rod and the grouting anchor rope is
。
4. The deep roadway bolting-grouting support system coupling cooperative control method according to claim 1, wherein the comprehensive evaluation index of grouting anchor rods in different sections of the roadway in the step c is
The comprehensive evaluation index of the grouting anchor cable in different sections of the roadway is
And n is the total number of grouting anchor cables.
5. The cooperative control method for the deep roadway bolting-grouting support system according to claim 1, wherein the average coupling degree model of the grouting anchor rod and the grouting anchor cable in step c is
。
6. The deep roadway bolting-grouting support system coupling cooperative control method according to claim 1, wherein said average coupling cooperative degree model of grouting anchor rod and grouting anchor cable in step d is
And evaluating the coupling cooperation grade of the deep roadway bolting-grouting support system, wherein delta and epsilon are importance coefficients and the importance degrees of a grouting anchor rod and a grouting anchor cable.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116046063A (en) * | 2023-01-05 | 2023-05-02 | 安徽建筑大学 | Method for monitoring prestress anchor bolt support of deep soft rock roadway |
| CN117780446A (en) * | 2024-02-26 | 2024-03-29 | 山东焱鑫矿用材料加工有限公司 | Safety performance monitoring method and system for coal mine support |
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2022
- 2022-05-12 CN CN202210512640.5A patent/CN114893233A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116046063A (en) * | 2023-01-05 | 2023-05-02 | 安徽建筑大学 | Method for monitoring prestress anchor bolt support of deep soft rock roadway |
| CN116046063B (en) * | 2023-01-05 | 2023-07-07 | 安徽建筑大学 | Method for monitoring prestress anchor bolt support of deep soft rock roadway |
| CN117780446A (en) * | 2024-02-26 | 2024-03-29 | 山东焱鑫矿用材料加工有限公司 | Safety performance monitoring method and system for coal mine support |
| CN117780446B (en) * | 2024-02-26 | 2024-05-28 | 山东焱鑫矿用材料加工有限公司 | Safety performance monitoring method and system for coal mine support |
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