孙疃煤矿7_211工作面基岩风化带特征  

Features of bedrock weathering zone in working surface 7_211 in Suntuan coal mine

作　　者：李小龙[1] 姚多喜[1] 杨金香[1] 胡友彪[1] 

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001

出　　处：《煤田地质与勘探》2014年第1期45-48,52,共5页Coal Geology & Exploration

基　　金：国家自然科学基金项目(51174256);安徽理工大学中青年学术骨干人才基金(2012[35])

摘　　要：煤层顶板基岩风化带特性决定了其隔水能力的强弱。通过分析孙疃煤矿7211工作面72煤层顶板基岩风化带的岩性特征、矿物成分、水理性质及物理力学性质、风化带分布特征等因素,表明:该工作面基岩风化带岩屑矿物主要为石英和长石;古地形对风化带的发育厚度变化影响较明显;风化带具有一定的隔水能力,具有抑制冒落带与导水裂隙带向上发育的作用,这对缩小防水煤岩柱、合理留设安全煤岩柱高度和回采上限十分有利。The characteristics of the weathered zone in bedrock above seam roof determine the water-resisting capacity of the zone. Through the research on many factors of bedrock weathered zone of the roof of seam 72 in the working sur-face 7211 in Suntuan coal mine, such as lithological characteristics, mineral composition, physical properties of water, physical and mechanical properties, weathered zone distribution characteristics, etc, it is showed that the minerals of rock fragments in bedrock weathered zone mainly consist of quartz and feldspar, that paleotopography has had obvious impact on the variation in thickness of the weathered zone, and that the weathered zone has certain watertight performance and restrains carving zones and transmission fissure zones from developing upwards. This kind of watertight performance is very advantageous to the reduction of safety pillars under water bodies, and it has important and realistic significance in reasonably setting up the height of coal and rock pillars for safety and the upper limit of mining, increasing the recovery rate of coal resources as well as fully developing and utilizing coal resources.

关 键 词：煤层顶板 基岩风化带 矿物成分 岩性特征 

分 类 号：TD12[矿业工程—矿山地质测量]