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通过示踪气体SF6测定了柠条塔煤矿N1201工作面地表漏风通道,计算出漏风速度分布,并且根据裂隙渗流的立方定律计算出裂隙等效水力宽度。研究发现,采矿塌陷形成裂隙带是漏风的主要通道,顺槽附近裂隙漏风相对较大。采空区形成的裂隙很难被完全压实,采空区深部漏风也比较严重。塌陷裂隙等效水力宽度基本呈条带状分布,等效水力度最大的条带正好处于背斜的轴部,并且其展布方向与背斜轴部完全一致,说明其受地质构造控制比较明显。
The surface air leakage path of N1201 working face in Tiezuta coal mine was measured by tracing gas SF6, the air leakage velocity distribution was calculated, and the equivalent hydraulic width of fracture was calculated according to the cubic law of fracture seepage. It is found that the fracture zone formed by mining subsidence is the main channel of air leakage and the air leakage near the trough is relatively large. The fissures formed in the gob are difficult to be fully compacted, and the air leakage in the deep part of the goaf is also serious. The equivalent hydraulic widths of the collapsed fractures are basically strip-like distribution. The strip with the largest equivalent hydraulic force is located exactly in the anticline axis and its distribution direction is completely consistent with the anticline axis, indicating that it is obviously controlled by the geological structure .