司马煤矿薄基岩区导水裂隙带发育规律  

Development Law of Water-flowing Fractured Zone in Sima Mine Thin Bedrock Area

作　　者：王延蒙 白海波[1] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]中国矿业大学力学与建筑工程学院,江苏徐州221116

出　　处：《煤矿安全》2015年第3期25-28,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(50974115);国家重点基础研究发展计划(973计划)资助项目(2013CB227900)

摘　　要：为了得出司马煤矿薄基岩区导水裂隙带的发育规律,首先对薄基岩分布特征及岩层力学特性进行了分析,进而利用经验公式计算出了导水裂隙带发育高度,同时运用数值计算软件RFPA2D对煤层开采进行了模拟。结果表明：司马煤矿3^#煤层薄基岩总体趋势为一向斜,局部有小的隆起和凹陷,薄基岩厚度变化范围在30-80 m;3^#煤层上覆的整个基岩柱的强度大于40 MPa,属于坚硬型;经验公式计算得到司马矿3^#煤层薄基岩导水裂隙带发育高度在47.3-83.5 m之间,与数值模拟得到的最大发育高度85 m基本相符。In order to get the development law of water- flowing fractured zone of thin bedrock in Sima Mine,we analyzed the distribution characteristics and rock mechanics characteristics of the thin bedrock. Then the empirical formula was used to calculate the development height of water- flowing fractured zone. At the same time,the coal mining was simulated by using the RFPA2 D. The results show that the general trend of thin bedrock of 3^#coal seam is synclinal. The local of the thin bedrock has small uplift and grooves. The range of the thickness of the thin bedrock is 30 m to 80 m. The strength of the whole based rock pillar is over 40 MPa. So it belongs to hard rock. The empirical formula was used,and the height of the water flowing fractured zone of 3^#coal seam in Sima mine is from 47. 3 m to 83. 5 m. The result is basically consistent with the numerical simulation. Numerical simulation obtained the maximum development height of 85 m.

关 键 词：薄基岩 导水裂隙带 顶板水防治 力学特征 数值模拟 RFPA^2D 

分 类 号：TD741[矿业工程—矿井通风与安全]