CN-121993258-A - Multi-scene coupling rock burst self-adaptive protection method

CN121993258ACN 121993258 ACN121993258 ACN 121993258ACN-121993258-A

Abstract

The invention discloses a multi-scene coupling rock burst self-adaptive protection method, relates to the technical field of coal mine safety protection, and aims to solve the problems that the existing protection method ignores multi-field coupling effect, passive fixation of protection means and feedback lag of supporting effect; according to the method, the distributed integrated sensor array is distributed in the key area of the surrounding rock of the roadway, the stress field, the seepage field, the temperature field and the crack development data are synchronously collected and fused, the real-time danger index is calculated according to the danger assessment model, the early warning signals are divided, the dominant coupling mode is identified, the force-heat split control support is executed for different coupling modes, meanwhile, the closed loop optimization model and the parameters of the dynamic response data of the surrounding rock after the support are collected, and the whole process of the visualization of the digital twin interface is combined, so that the danger assessment accuracy and the protection suitability are greatly improved, the manual intervention is reduced, the coal mine rock burst protection is promoted to be intelligent and self-adaptive, and the safety production of deep coal mines is effectively ensured.

Inventors

WANG QIANG
LIU FENGKAI
Xue Chengchun
CHEN FAN
CAO ANYE
WANG CHANGBIN
LIU YAOQI

Assignees

中国矿业大学

Dates

Publication Date: 20260508
Application Date: 20260316

Claims (10)

1. A multi-scenario coupled rock burst adaptive protection method, the method comprising the steps of: step S1, distributing a distributed integrated sensor array in a key area of roadway surrounding rock, synchronously collecting stress field, seepage field, temperature field and crack development data in real time, and carrying out space-time alignment and data fusion to obtain a multi-scene coupling data set; step S2, calculating a real-time risk index through a risk assessment model based on the multi-scene coupling data set According to Dividing values and generating at least three levels of early warning signals, and simultaneously positioning a high-risk area and identifying a dominant coupling mode; step S3, performing force-heat split control support according to the early warning signal and the dominant coupling mode; step S31, when facing stress-seepage coupling leading type high risk, the hydraulic servo system is based on the risk index Area of dangerous area Dynamically lifting the target pretightening force of the anchor rod group according to a preset function, and enabling the directional grouting system to monitor the pore water pressure of the surrounding rock in real time And fracture development data At a level higher than And the grouting pressure and the grouting quantity which are in direct proportion to C, and accurately fills the cracks at high pressure, wherein, A grouting pressure safety coefficient greater than 1 determined based on surrounding rock fracture characteristics; step S32, triggering the thermally-induced phase change support plate when the medium and above risks of temperature-stress coupling leading are faced, and detecting the surrounding rock temperature to reach the set temperature of the phase change material in the plate by the surface temperature sensor When the thermal phase change support plate is used, the heat of surrounding rock is continuously consumed through the phase change heat absorption effect, and the thermal stress is restrained; S4, collecting dynamic response data of the surrounding rock after supporting, evaluating supporting effect, and carrying out dynamic fine adjustment on a danger evaluation model and supporting control parameters based on the effect to carry out closed-loop optimization; And S5, mapping and displaying the whole flow information from data acquisition, dangerous cloud images, early warning signals and supporting actions to system optimization in real time through a digital twin visual interface.
2. The method for adaptively protecting the rock burst through multi-scene coupling according to claim 1, wherein in the step S1, the distributed integrated sensor array is arranged in a heterogeneous mode, stress-seepage composite sensors are preferentially arranged in a stress concentration area, and temperature-crack cooperative sensors are preferentially arranged in a high temperature area.
3. The method for adaptively protecting a multi-scene-coupled rock burst according to claim 1, wherein in step S2, the real-time risk index is determined The function expression is calculated by a weighted fusion algorithm as follows: , wherein, Respectively stress, seepage pressure, temperature and fracture parameters, Is the corresponding dynamic weight coefficient.
4. The method for adaptively protecting a multi-scene-coupled rock burst according to claim 1, wherein in step S31, the target pretightening force is the same as that of the target pretightening force The calculation of (a) satisfies Wherein For a gain factor determined from the lithology of the surrounding rock, As a basis of the pre-tightening force, Is a dangerous index, Is the dangerous area.
5. The method of claim 1, wherein in step S31, the grouting pressure is the same as the grouting pressure Needs to meet the requirements of Wherein For the safety coefficient determined based on the surrounding rock fracture characteristics, when the rock integrity coefficient is more than or equal to 0.7, The value is 1.2-1.5, when the rock mass integrity coefficient is less than 0.7, The value is 1.5-2.0.
6. The method for adaptively protecting a multi-scene-coupled rock burst according to claim 1, wherein in step S32, the phase transition temperature of the phase transition material is Is set at 40-60 ℃.
7. The method of claim 1, wherein in step S4, the dynamic fine tuning is to adjust the weight coefficient or gain coefficient based on the rate of relief of the stress concentration degree of the surrounding rock after the pre-tightening force is applied or the rate of decrease of the seepage pressure after grouting 。
8. The method of claim 1, wherein in step S2, the dominant coupling mode is identified, and the physical field combination with the highest contribution degree is determined as the dominant coupling mode by calculating the contribution degree of parameters of stress field, seepage field, temperature field and crack development data in the risk index R.
9. The method of claim 1, wherein in step S5, the digital twinning visual interface is capable of backtracking and analyzing historical protection cases.
10. The method of claim 1, wherein in step S4, the period of closed loop optimization is dynamically adjusted according to the severity of the mining activity.

Description

Multi-scene coupling rock burst self-adaptive protection method Technical Field The invention relates to the technical field of coal mine safety protection, in particular to a multi-scene coupling rock burst self-adaptive protection method. Background The rock burst is a severe dynamic disaster caused by surrounding rock stress mutation in the coal mining process, which can cause roadway collapse, equipment damage and even casualties, severely restricts coal mine safety production, and makes the multi-scene coupling effect of stress field, seepage field, temperature field and crack development more remarkable along with the continuous increase of coal mining depth and gradual increase of mining intensity, so that the inoculation mechanism and explosion rule of the rock burst are more difficult to control. The existing rock burst protection method is mainly based on single physical field monitoring data to formulate a protection strategy, and is lack of comprehensive consideration on multiple field coupling effects, so that risk assessment accuracy is insufficient, meanwhile, traditional protection means such as grouting or supporting plates are mainly passive fixed supporting, protection parameters are difficult to dynamically adjust according to real-time risks, differential protection capability for different leading coupling modes is weak, in addition, supporting effect feedback is delayed, dynamic iteration of the protection strategy cannot be achieved, complex and changeable underground geological environments are difficult to adapt, and actual requirements of accurate control of rock burst of deep coal mines cannot be effectively met. Disclosure of Invention The invention aims to provide a multi-scene coupling rock burst self-adaptive protection method so as to solve the problems in the background technology. In order to achieve the purpose, the invention provides a multi-scene coupling rock burst self-adaptive protection method, which comprises the following steps: step S1, distributing a distributed integrated sensor array in a key area of roadway surrounding rock, synchronously collecting stress field, seepage field, temperature field and crack development data in real time, and carrying out space-time alignment and data fusion to obtain a multi-scene coupling data set; step S2, calculating a real-time risk index through a risk assessment model based on the multi-scene coupling data set According toDividing values and generating at least three levels of early warning signals, and simultaneously positioning a high-risk area and identifying a dominant coupling mode; step S3, performing force-heat split control support according to the early warning signal and the dominant coupling mode; step S31, when facing stress-seepage coupling leading type high risk, the hydraulic servo system is based on the risk index Area of dangerous areaDynamically lifting the target pretightening force of the anchor rod group according to a preset function, and enabling the directional grouting system to monitor the pore water pressure of the surrounding rock in real timeAnd fracture development dataAt a level higher thanAnd the grouting pressure and the grouting quantity which are in direct proportion to C, and accurately fills the cracks at high pressure, wherein,A grouting pressure safety coefficient greater than 1 determined based on surrounding rock fracture characteristics; step S32, triggering the thermally-induced phase change support plate when the medium and above risks of temperature-stress coupling leading are faced, and detecting the surrounding rock temperature to reach the set temperature of the phase change material in the plate by the surface temperature sensor When the thermal phase change support plate is used, the heat of surrounding rock is continuously consumed through the phase change heat absorption effect, and the thermal stress is restrained; S4, collecting dynamic response data of the surrounding rock after supporting, evaluating supporting effect, and carrying out dynamic fine adjustment on a danger evaluation model and supporting control parameters based on the effect to carry out closed-loop optimization; And S5, mapping and displaying the whole flow information from data acquisition, dangerous cloud images, early warning signals and supporting actions to system optimization in real time through a digital twin visual interface. Preferably, in step S1, the distributed integrated sensor array is configured in a heterogeneous manner, stress-seepage composite sensors are preferentially configured in a stress concentration area, and temperature-crack cooperative sensors are preferentially configured in a high temperature area. Preferably, in step S2, the real-time risk indexThe function expression is calculated by a weighted fusion algorithm as follows: , wherein, Respectively stress, seepage pressure, temperature and fracture parameters,Is the corresponding dynamic weight coefficient. Preferably,