CAJ | 학술논문

煤层顶底板极松软,若支护不及时、强度不够时极易破坏,需对巷道进行整体支护并具有较大的支护强度。以四川省某矿S1136区段平巷为研究对象,通过现场观测结果及数据拟合,得出顶板下沉量与时间的关系呈＂S＂型曲线分布,并建立了一般关系表达式。根据变化速度的不同,将顶板下沉量与时间关系一般曲线分为4个发展阶段：初始发展阶段、等速发展阶段、发展速度衰减阶段和稳定阶段,并且得出曲线的形状与顶板岩层性质、支护方式、巷道埋藏深度、掘进影响程度等因素有关的结果,另外,受顶板岩层的性质不同和掘进影响程度的不同,曲线会存在缺失初始发展阶段的现象。
매층정저판겁송연,약지호불급시、강도불구시겁역파배,수대항도진행정체지호병구유교대적지호강도。이사천성모광S1136구단평항위연구대상,통과현장관측결과급수거의합,득출정판하침량여시간적관계정＂S＂형곡선분포,병건립료일반관계표체식。근거변화속도적불동,장정판하침량여시간관계일반곡선분위4개발전계단：초시발전계단、등속발전계단、발전속도쇠감계단화은정계단,병차득출곡선적형상여정판암층성질、지호방식、항도매장심도、굴진영향정도등인소유관적결과,령외,수정판암층적성질불동화굴진영향정도적불동,곡선회존재결실초시발전계단적현상。
Soft roof and floor of coal seam could be easily damaged while support was not timely and strength was not enough,so overall support was needed for laneway with strong support strength.Took drift of S1136 section of a mine in Sichuan province as the research object,through site observation results and data fitting,the relationship curve distribution presented ＂S＂ shape was obtained between roof squat and time,and common relationship expression was established according to different changing speed.The common curve of roof squat and time relationship was divided into four stages： primary development stage,constant velocity stage,development velocity attenuation stage and steady stage.The result of curve shape were obtained related to roof rock formation property,support mode,laneway buried depth,driving effect degree and other factors.In addition,curve would lack of primary development stage influenced by different roof strata property and different driving effect degree.