Classification and weighting evaluation method for rock burst prevention safety and its application in coal mine
OUYANG Zhenhua;XU Qianhai;ZHANG Ningbo;ZHANG Tianzi;GUO Haoran;WANG Jiajia
针对当前矿井冲击危险性评价主要聚焦于设计阶段或防冲措施实施之前,缺少对实施防冲措施后的采掘工作面防冲安全性评价的现状,综合考虑冲击地压发生地点、破坏形式、载荷类型和震源位置等,将冲击地压类型划分为煤体型、煤柱型、顶板型、断层型、综合型5种类型;基于分类防治思想,综合考虑冲击危险性、巷道围岩、监测预警体系、防冲支护体系、冲击地压防治措施和防冲管理能力等因素对防冲安全性的影响,提出了分类赋权评价方法;给出了防冲安全性系数计算公式;将防冲安全等级划分为安全、基本安全、不安全3个等级。以某矿31119工作面为例,给出了防冲安全性评价的完整流程和结果;运用分类赋权评价方法对部分典型冲击地压矿井具有冲击危险的工作面进行了防冲安全性评价,结合实际的冲击显现情况,验证了分类赋权评价方法评价结果的可靠性。
In view of the current situation that mine impact risk evaluation mainly focuses on the design stage or prior to the implementation of anti-impact measures, and lacks the safety evaluation of mining face after the implementation of anti-impact measures, the types of rock burst are divided into five types: coal type, coal pillar type, roof type, fault type and comprehensive type, taking into account the occurrence location, failure form, load type and focal location; based on the idea of classification prevention and control, a classification weighted evaluation method is proposed, considering the impact of impact risk, roadway surrounding rock, monitoring and early warning system, anti-impact support system, anti-impact rock pressure prevention measures and anti-impact management ability on anti-impact safety; the calculation formula of safety factor of anti-impact is given. The safety level of anti-impact is divided into three levels: safety, basic safety and unsafe. Taking the 31119 working face of a mine as an example, the complete process and result of anti-impact safety evaluation are given. The safety evaluation of some typical mining face with impact risk is carried out by using the classification weighting evaluation method, and the reliability of the evaluation results is verified by combining with the actual impact occurrence.
rock burst;rock burst prevention safety;safety factor;classification and weighting evaluation;types of rock burst
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会