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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1.05~1.37m时,最大导水裂缝带高度为25.5~29.3m。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。
In order to reasonably reserve Quaternary waterproof pillars in coal outcrops, it is one of the most important basic work to predict the height of water-conducting fractures before mining. Based on the previous exploration data of 16 coal outcrops in the lower part of Taiyuan Formation of Xin’an Coal Mining Company in Tengzhou Mining Area, the coal outcrops of 16 coal outcrops were comprehensively analyzed using four methods of “three rules”, calculation methods of fracturing and production ratio, function formulas and numerical simulation The height of the aqueduct has been predicted and compared. Multiple methods complement one another, validate and overcome the limitations of a single method. The results show that when the thickness of 16 coal is between 1.05 and 1.37 m, the maximum height of water conducting fracture zone is 25.5-29.3 m. The calculation results provide a basis for setting up Quaternary waterproof pillars and also provide important parameters for mine roof water control.