CAJ | 학술논문

针对受巨厚砾岩影响的跃进煤矿23130工作面下巷多次发生冲击矿压现象，研究了上覆砾岩的厚度对采动围岩应力演化影响规律。运用FLAC2D 数值模拟研究了在上覆不同厚度砾岩条件下23090和23110工作面回采过程中对相邻工作面煤体应力场分布，以及23130工作面下巷开挖过程中应力演化的影响规律。研究表明：上覆砾岩厚度越大，回采后影响范围越大，使相邻工作面煤岩体的最大应力值越大。23130工作面下巷开挖过程中随着砾岩厚度的增加，垂直应力降低幅度越大，应力差越大，底板塑性破坏越严重，越容易发生冲击矿压。
침대수거후력암영향적약진매광23130공작면하항다차발생충격광압현상，연구료상복력암적후도대채동위암응력연화영향규률。운용FLAC2D 수치모의연구료재상복불동후도력암조건하23090화23110공작면회채과정중대상린공작면매체응력장분포，이급23130공작면하항개알과정중응력연화적영향규률。연구표명：상복력암후도월대，회채후영향범위월대，사상린공작면매암체적최대응력치월대。23130공작면하항개알과정중수착력암후도적증가，수직응력강저폭도월대，응력차월대，저판소성파배월엄중，월용역발생충격광압。
In order to research rock-burst occurred in lower roadway of 23130 mining face influenced by extremely-thick conglomera-tion, the influence of conglomeration thickness on mining stress evolvement was analyzed .Applying FLAC2D to analyzing coal stress dis-tribution of 23090 and 23110 mining face under different conglomeration thicknesses and stress evolvement during lower roadway exca -vation of 23130 mining face.Results showed that the larger the conglomeration thickness was , the larger the mining influence range and maximum stress value of adjacent mining was .In excavating lower roadway of 23130 mining face, with conglomeration thickness in-creasing, vertical stress reduction degree and stress difference was larger and larger , the more serious floor failure was , which more easily resulted in rock-burst.