下组煤露头区导水裂缝带高度综合确定

Water-conducting Fissure Zone Height of Outcrop Area of Lower-group Coal-seam

为了合理留设煤层露头区第四系防水煤柱，采前进行导水裂缝带高度预计是重要的基础工作之一。以滕州矿区新安煤业公司太原组下部16煤露头区以往勘探资料为基础，综合运用“三下规程”、裂采比计算方法、函数公式和数值模拟4种方法，对16煤露头区开采导水裂缝带高度进行了预计，并进行了对比分析。多种方法可互相弥补、验证，克服了单一方法的局限性。结果显示，16煤厚度取值1．05～1．37 m时，最大导水裂缝带高度为25．5～29．3 m。计算结果为留设第四系防水煤柱提供了依据，同时也为矿井防治顶板水提供了重要参数。

Water-conducting fissure zone height prediction is one of the important basic works before mining for rationally designing water-proof coal pillar.Based on past exploration information of 16 coal outcrop area of Xin＇an Coal Company, Tengzhou mining area, applying the regulation of mining under buildings , railway and water body , fissure-to-mining ratio calculation method , function formu-la and numerical simulation , water-conducting fissure zone height was predicted and compared .Multi methods could mutually remedy , testify and overcome limitation of single method.Results showed that maximum water-conducting fissure zone height was 25.5~29.3 m when coalseam height was 1.05~1.37 m, which provided basis for coal pillar design and important parameters for roof water prevention .