CAJ | 학술논문

薄基岩厚黏土层煤层开采时具有与普通薄基岩厚松散层工作面不一样的矿压显现规律，基于赵固二矿的具体地质条件通过UDEC4.0模拟研究了当基岩厚度为0m，30m和60m时工作面初次来压步距、周期来压步距、支承压力分布和上覆顶板岩层垮落形态等，通过模拟得知，黏土层顶板有较小的来压步距，能缓和工作面煤壁前方的支承压力，并能与薄基岩共同成拱或独立成拱用以承担上覆岩层的重量，且厚黏土层以弯曲下沉为主，对于防止地表水侵入工作面也是有利的。
박기암후점토층매층개채시구유여보통박기암후송산층공작면불일양적광압현현규률，기우조고이광적구체지질조건통과UDEC4.0모의연구료당기암후도위0m，30m화60m시공작면초차래압보거、주기래압보거、지승압력분포화상복정판암층과락형태등，통과모의득지，점토층정판유교소적래압보거，능완화공작면매벽전방적지승압력，병능여박기암공동성공혹독립성공용이승담상복암층적중량，차후점토층이만곡하침위주，대우방지지표수침입공작면야시유리적。
There was different underground pressure rule in mining under thin basement rock , thick clay stratum and under ordinary thin basement rock and thick loose bed .On the basis of geological condition of Zhaogu 2nd Mine, applying UDEC to simulating first roof caving pace, periodical weighting pace , abutment pressure distribution and roof caving form when basement rock thickness was 0m, 30m and 60m.Result showed that weighting pace of clay stratum roof was small , and could relax abutment pressure in front of mining face and formed arch itself or with thin basement rock to bear weight of surrounding rock .Thick clay stratum mainly took on bending and subsidence deformation characteristic , which was favorable for preventing ground water entering mining face .