淄博煤田石谷井田底板水害分析及防治水对策探讨

石谷井田位于淄博向斜东翼中段深部,整体上呈单斜构造,开采煤层为太原组底部9、10号煤层。通过对井田水文地质条件的分析认为：本溪组徐上砂岩、徐灰及奥陶系石灰岩承压水是矿井的主要充水含水层;影响井田含水层富水性的主要因素是地形地貌、含水岩组与可采煤层之间的岩性组合、厚度变化及断裂构造;井田底板突水形式主要是裂隙扩大型和裂隙渗流型。对井田的底板突水规律进行了分析研究,提出了以查明底板水文地质条件为前提,以准确分析判断可能发生的底板突水类型为基础,做好探查探测、实时监控、分析评价、预测预报、疏放降压、条带开采、合理留设煤柱的综合预防及治理措施。

Probe into Floor Flooding and Control Countermeasures in Shigu Minefield,Zibo Coalfield

The Shigu minfield is situated at deep part of east limb middle sector, Zibo syncline, presents a monocline en bloc; Nos.9 and 10 coal seams in Taiyuan Formation bottom are mined. Through minefield hydrogeological condition analysis, considered that the Benxi Formation Xushang sandstone, Xu limestone and Ordovician limestone confining aquifers are main water filling aquifers in the minefield. Main aquifer water yield property impacting factors have landform and relief, lithologic assemblage of water-bearing beds and mineable coal seams, thickness variation and faulted structures. Pointed out the floor water bursting form in the minefield is mainly fissure extending type and fissure seeping type. Meanwhile, analyzed and studied minefield water bursting regular patterns, to take floor hydrogeological condition finding out as prerequisite, correct analyzed possible floor water bursting type judging as basis, put forward integrated prevention and governing measures including to get done with exploration and detection, real time monitoring, analysis and assessment, prediction and forecasting, drainage pressure lowering, partial extraction, and design coal pillar rationally.