CN-122022452-A - Stope impact risk quantification dynamic evaluation method and system based on static pre-evaluation and dynamic correction

CN122022452ACN 122022452 ACN122022452 ACN 122022452ACN-122022452-A

Abstract

The application relates to the technical field of mining and provides a stope impact risk quantification dynamic evaluation method and system based on static pre-evaluation and dynamic correction, wherein a static risk index of stope impact risk is determined through the static pre-evaluation method Then, the obtained multisource dynamic information of the current state of the stope is used for obtaining static risk index of the impact risk of the stope Carrying out dynamic correction to finally determine dynamic risk coefficient of stope impact risk To dynamically evaluate the impact risk of the mine stope. Thereby, in the stope impact risk evaluation, a complete evaluation closed loop of the stope impact risk is formed The automatic lifting of the stope impact risk level is realized by dynamically updating with the change of the monitoring data and the stope production activity, and the transition from static division to dynamic diagnosis and from qualitative judgment to quantitative calculation of the stope impact risk evaluation is realized.

Inventors

WEI QUANDE
SHI XIANFENG
WANG HAO
LIU WEI
WANG BO
LI ZHANCHENG
WU ZHEN
YIN HAICHEN
Hao qilin
WANG JUNHUI
ZHU QUANJIE
JIANG DONGSHENG
ZHANG XIUFENG
WANG CHAO
CHANG YAN
WANG CUNWEN
WANG BOXIANG
CHEN YANG

Assignees

华北科技学院(中国煤矿安全技术培训中心)

Dates

Publication Date: 20260512
Application Date: 20251230

Claims (10)

1. The stope impact risk quantification dynamic evaluation method based on static pre-evaluation and dynamic correction is characterized by comprising the following steps of: static risk index for determining stope impact risk by static pre-evaluation method ; According to the obtained multisource dynamic information of the current state of the stope, the static risk index of the impact risk of the stope Dynamic correction is carried out, and dynamic risk coefficient of stope impact risk is determined To dynamically evaluate the impact risk of the mine stope.
2. The method according to claim 1, wherein the static risk index of the stope impact risk is determined by a multi-factor coupling evaluation method or a comprehensive index method 。
3. The method of claim 1, wherein the mine pressure relief effect index is determined based on the acquired multi-source dynamic information of the stope Index of supporting effect Coefficient of other influence Disturbance factor of exploitation Wherein the multisource dynamic information at least comprises real-time monitoring data, production activity parameters and engineering measure effect parameters, and the engineering measure at least comprises one of roof presplitting pressure relief, drilling pressure relief, blasting presplitting, hydraulic fracturing and supporting; and constructing a dynamic risk coefficient model: static risk index for stope impact risk Performing dynamic correction; In the formula, A dynamic risk coefficient for the risk of stope impact; A static risk index that is the risk of stope impact; Pressure relief effect index for stope impact risk respectively Index of supporting effect Reservation influence index coefficient Disturbance factor of exploitation Dynamic weight coefficients of (a).
4. The method of claim 3, wherein the step of, Responding to mine roof pre-cracking pressure relief, and based on the obtained micro-seismic release energy, the micro-seismic event frequency, the micro-seismic event space concentration and the large-energy micro-seismic event quantity before and after the roof pre-cracking pressure relief in the roof pre-cracking pressure relief implementation effect parameters, according to the formula: determining a pressure relief effect index for roof presplitting pressure relief ; In the formula, The energy is released for micro-vibration after the top plate is presplit and relieved, Releasing energy for micro-vibration before pre-cracking and pressure relief of the top plate; the damping rate of the microseism energy release before and after the presplitting and pressure relief of the top plate; The frequency of microseismic events before and after the pre-cracking and pressure relief of the top plate, The frequency of microseismic events before the top plate is presplit and relieved; The frequency reduction proportion of microseismic events before and after the top plate presplitting pressure relief is carried out; the central distribution radius of the microseismic events before and after the top plate presplitting pressure relief is respectively used for representing the spatial concentration of the microseismic events before and after the top plate presplitting pressure relief; The effective radius expansion coefficient of pressure relief for roof presplitting and pressure relief; The high-energy microseismic event change rate before and after the presplitting and pressure relief of the top plate; The number of the high-energy microseismic events before and after the pre-cracking and pressure relief of the top plate are respectively calculated; respectively the damping rate of the release of the microseismic energy Proportion of frequency drop of microseismic events Coefficient of effective radius expansion Rate of change of high energy microseismic events Weight coefficient of (c) in the above-mentioned formula (c).
5. A method according to claim 3, wherein in response to the mine taking a coal seam borehole pressure relief, the coal body stress and cuttings amount before and after the borehole pressure relief in the effect parameters are implemented based on the obtained borehole pressure relief measures, according to the formula: determining a pressure relief effect index of a coal seam drilling pressure relief ; In the formula, The stress and the drilling cuttings of the coal body before the pressure relief of the coal bed are respectively calculated; the stress amplitude reduction and the drilling cuttings amount amplitude reduction of the coal body after the coal bed drilling and pressure relief are respectively carried out; stress reduction rates before and after the pressure relief of the coal seam drilling Rate of decrease in the amount of cuttings Is a weight of importance of (1), wherein, 。
6. A method according to claim 3, characterized in that the average working resistance, rated working resistance and dynamic load coefficient of the supporting structure in the effect parameters are implemented based on the acquired supporting measures, according to the constructed mine supporting effect model: Determining a supporting effect index after supporting a mine ; In the formula, The method is characterized in that the method is an average working resistance and a rated working resistance of a supporting structure for supporting the mine; the dynamic load coefficient of the supporting structure is used for supporting the mine; Static load supporting capacity of supporting structures supporting mines respectively Dynamic load stabilization Wherein, 。
7. A method according to claim 3, wherein a mine production disturbance model is constructed: In the formula, Mining disturbance coefficients for stope impact risk; for the daily average mining speed of the mine, The method comprises the steps of presetting the mining speed of a mine; distance from the mining face of the mine to its nearest critical formation; A preset reference distance for the influence of key construction on the stress state of surrounding coal rock mass is formed; Respectively mining disturbance factors Construction proximity influencing factor Wherein, 。
8. A method according to claim 3, wherein the stress relief effect index is determined by a hierarchical analysis method, a principal component analysis method or a machine learning method Index of supporting effect Reservation influence index coefficient Disturbance factor of exploitation Dynamic weight coefficients of (a).
9. The method of claim 1, wherein the step of determining the position of the substrate comprises, Dynamic risk factor in response to stope impact risk Judging that the mine stope has no impact risk; dynamic risk factor in response to stope impact risk Judging that the mine stope is in weak impact danger; dynamic risk factor in response to stope impact risk Judging that the mine stope is medium impact risk; dynamic risk factor in response to stope impact risk And judging that the mine stope is in strong impact risk.
10. A stope impact risk quantification dynamic evaluation system based on static pre-evaluation and dynamic correction, characterized in that the evaluation system is deployed with the stope impact risk quantification dynamic evaluation method based on static pre-evaluation and dynamic correction as set forth in any one of claims 1-9, the evaluation system comprising: A static index unit configured to determine a static risk index of a stope impact risk by a static pre-evaluation method ; A dynamic evaluation unit configured to obtain static risk index of impact risk of stope according to the multisource dynamic information of the current state of stope Dynamic correction is carried out, and dynamic risk coefficient of stope impact risk is determined To dynamically evaluate the impact risk of the mine stope.

Description

Stope impact risk quantification dynamic evaluation method and system based on static pre-evaluation and dynamic correction Technical Field The application relates to the technical field of mining, in particular to a stope impact risk quantification dynamic evaluation method and system based on static pre-evaluation and dynamic correction. Background Rock burst is a typical dynamic disaster in coal mining and is represented by the fact that elastic energy accumulated in coal rock mass is released violently in an instant, so that a roadway is damaged, equipment is damaged and personnel casualties are caused. With gradual increment of coal resource exploitation depth, high ground stress, strong exploitation disturbance and complex geological conditions faced by deep exploitation make rock burst disasters more frequent and serious, and become one of the most main threats restricting deep coal resource safe and efficient exploitation. Therefore, the accurate and reliable impact risk evaluation of the stope and the roadway is a precondition and key for realizing early warning and effective control of disasters. Currently, the impact risk rating method commonly adopted in the industry mainly comprises a static evaluation method based on geological conditions and a dynamic early warning method based on real-time monitoring. The static evaluation method (such as comprehensive index method, multi-factor coupling analysis method, etc.) is mainly used for carrying out regional and priori dangerous division on the mining area or working surface according to relatively fixed geological factors such as coal seam impact tendency, mining depth, geological structure, roof lithology structure, etc. The dynamic early warning method is used for monitoring the dynamic response of the coal and rock mass in real time by means of a microseismic monitoring system, a ground sound monitoring system, a stress on-line monitoring system, a drilling cutting method and the like. Disclosure of Invention The application aims to provide a stope impact risk quantification dynamic evaluation method and system based on static pre-evaluation and dynamic correction, so as to solve or alleviate the problems in the prior art. In order to achieve the above object, the present application provides the following technical solutions: the application provides a stope impact risk quantification dynamic evaluation method based on static pre-evaluation and dynamic correction, which comprises the steps of determining a static risk index of the stope impact risk by the static pre-evaluation method According to the obtained multisource dynamic information of the current state of the stope, the static risk index of the impact risk of the stope is obtainedDynamic correction is carried out, and dynamic risk coefficient of stope impact risk is determinedTo dynamically evaluate the impact risk of the mine stope. Preferably, the static risk index of the stope impact risk is determined by a multi-factor coupling evaluation method or a comprehensive index method。 Preferably, the mine pressure relief effect index is determined based on the acquired multisource dynamic information of the stopeIndex of supporting effectCoefficient of other influenceDisturbance factor of exploitationWherein the multisource dynamic information at least comprises real-time monitoring data, production activity parameters and engineering measure effect parameters, and the engineering measure at least comprises one of roof presplitting pressure relief, drilling pressure relief, blasting presplitting, hydraulic fracturing and supporting; and constructing a dynamic risk coefficient model: static risk index for stope impact risk And performing dynamic correction, wherein in the process,A dynamic risk coefficient for the risk of stope impact; A static risk index that is the risk of stope impact; Pressure relief effect index for stope impact risk respectively Index of supporting effectReservation influence index coefficientDisturbance factor of exploitationDynamic weight coefficients of (a). Preferably, in response to the mine taking roof pre-cracking pressure relief, the micro-seismic release energy, the frequency of micro-seismic events, the spatial concentration of the micro-seismic events and the number of high-energy micro-seismic events in the roof pre-cracking pressure relief implementation effect parameters are based on the acquired roof pre-cracking pressure relief measures according to the formula: determining a pressure relief effect index for roof presplitting pressure relief ; In the formula,The energy is released for micro-vibration after the top plate is presplit and relieved,Releasing energy for micro-vibration before pre-cracking and pressure relief of the top plate; the damping rate of the microseism energy release before and after the presplitting and pressure relief of the top plate; The frequency of microseismic events before and after the pre-cracking and pressure relief of