CAJ | 학술논문

青海能源发展（集团）鱼卡公司煤矿2920运输巷设计长度2200m ，直墙半圆拱形断面，布置在煤7中，沿煤层顶板掘进，为三软煤层巷道，埋深300 m。为降低支护成本，巷道支护形式以锚网、锚索和锚带支护为主；在特殊地段，增加U 型钢支架、喷射混凝土和注浆加固等不同组合形式的联合支护，取得了预期效果。重点介绍了该三软煤层巷道正常情况、较大压力和变形大时3种情况下的支护方案及支护效果。
청해능원발전（집단）어잡공사매광2920운수항설계장도2200m ，직장반원공형단면，포치재매7중，연매층정판굴진，위삼연매층항도，매심300 m。위강저지호성본，항도지호형식이묘망、묘색화묘대지호위주；재특수지단，증가U 형강지가、분사혼응토화주장가고등불동조합형식적연합지호，취득료예기효과。중점개소료해삼연매층항도정상정황、교대압력화변형대시3충정황하적지호방안급지호효과。
A designed length of No.2920 transportation gateway in Yuqia Company’s Mine of Qinghai Energy Development Group was 2200m.The mine gateway with a vertical sidewall and semi-circle arch cross section was placed in No.7 seam and was driven along the roof of the seam.The mine gate-way was in a seam with a soft roof ,soft coal and soft floor and was in a depth of 300m.In order to re-duce a support cost ,the support mode of the mine gateway was mainly based on bolt-steel mesh ,an-chor and bolt steel band.At some special section of the gateway ,a combined support with a U type steel square support ,shotcreting ,grouting reinforcement and other different composited modes was a-dopted and an expected effect was obtained.The paper stressed the introduction on three support plans and support effects under a normal condition ,high strata pressures and large deformation of the mine gateway in the seam with the soft roof ,soft coal and soft floor.