新兴煤矿冲击矿压影响因素及危险区域划分

Rock burst impact factors and danger zones in Xinxing coal mine

针对新兴煤矿冲击矿压频发的情况,结合该矿工作面概况,从地质赋存条件和开采技术入手,分析影响冲击矿压的主要因素,并进行危险区域划分。结果表明:煤层冲击倾向性、开采深度、顶底板坚硬程度、多种应力叠加作用、相邻开采区、巷旁留垛等为影响新兴煤矿冲击矿压的主要因素。41051工作面和41062工作面的冲击危险区域为工作面回风巷130～200 m与其上出口40～50 m范围;特别冲击危险区域为工作面上出口附近。该结果为煤矿安全开采提供了保障。

Aimed at addressing the frequent occurrence of rock burst in Xinxing coal mine,this paper provides an analysis of the main factors influencing the rock burst and classification of danger zone,combined with the overview of mining work face and starting from the geological occurrence conditions and mining technology.The results show that impact tendency of coal seam,mining depth,the hard degree of roof and floor,a variety of stress superimposition,adjacent mining,woodpile beside roadway constitute the main factors influencing the rock burst in Xinxing coal mine.41051 work face and 41062 work face are exposed to danger zones lying in return air lanes 130 ～200 m and up export 40 ～50 m and to special danger zones near the up export.This study serves to ensure safe mining production.