CAJ | 학술논문

河北唐山矿冲击地压的发生除了受开采技术条件、煤层顶底板岩石学特征等因素影响外,主要受赋存环境的影响,其中地应力条件是一个重要的影响因素.以唐山矿构造应力分布规律为背景,对不同水平构造应力条件下回采工作面煤层及其顶底板围岩的三维场进行了数值分析,系统研究了构造应力对煤层及其顶底板围岩的冲击地压的影响.结果表明,在煤矿开采过程中,高水平构造应力对采区煤层及其顶底板围岩的应力场和能量场的分布规律具有重要影响.高构造应力条件下,煤层及其顶底板围岩中的高水平应力为冲击地压的发生提供了力源条件,而在高地应力环境下所积聚的大量弹性应变能为冲击地压的发生提供了能量条件.
하북당산광충격지압적발생제료수개채기술조건、매층정저판암석학특정등인소영향외,주요수부존배경적영향,기중지응력조건시일개중요적영향인소.이당산광구조응력분포규률위배경,대불동수평구조응력조건하회채공작면매층급기정저판위암적삼유장진행료수치분석,계통연구료구조응력대매층급기정저판위암적충격지압적영향.결과표명,재매광개채과정중,고수평구조응력대채구매층급기정저판위암적응력장화능량장적분포규률구유중요영향.고구조응력조건하,매층급기정저판위암중적고수평응력위충격지압적발생제공료력원조건,이재고지응력배경하소적취적대량탄성응변능위충격지압적발생제공료능량조건.
Occurrence of rock burst in Tangshan mining area is not only controlled by mining conditions, roof con-trolling methods and lithologic characters of roof and floor, but also influenced by the environmental factors such as tectonic stress, ground water and so on. Among them, tectonic stress is one of the important factors to influence the potential of coal and rock burst during coal mining. Based on the field data of geological structures and occur-rences of rock burst in Tangshan mining area, three-dimensional fields in coal bed and its surrounding rock were modeled and analyzed under different tectonic stress conditions by using numerical modeling software FLAC3D. Results show that tectonic stress has obvious influence on the distribution of stress field and energy field in coal bed and its surrounding rock. Under high structural stress conditions, high horizontal stress is the source of force and elastic strain energy stored in coal bed and its surrounding rock is the source of energy to induce to rock burst during coal mining.