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本文依据新集五矿已有的勘探、巷探资料以及邻近矿井的地质、水文资料 ,对 11- 2煤层的沉积特征、赋存状态、构造发育状况 ,进行综合分析。按照岩体强度指数分类标准 ,对煤层的老顶、直接顶、伪顶的单轴抗压强度做统计分析 ,确定 :11- 2煤层合适上综采。 - 3 5 0～ 4 5 0 m水平煤层倾角平均 13°,褶曲宽缓 ,单位涌水量 0 .0 0 3 3 L /s.m ,瓦期相对涌出量小于 3 .5 m3 /t,是理想的综采块段。工作面架型选择掩护式液压支架。 - 4 5 0 m以上 ,煤层角度大于2 0°,支架须采用防滑、防倒装置。采空区采用全部垮落法。
Based on the existing exploration and exploration data of Xinji Minmetals as well as the geological and hydrological data of adjacent mines, the paper analyzes the sedimentary characteristics, occurrence and tectonic development of 11-2 coal seam. According to the rock mass strength index classification standard, the uniaxial compressive strength of the old roof, the direct roof and the pseudo roof of the coal seam are statistically analyzed, and it is determined that the 11-2 coal seam is suitable for fully mechanized mining. - The average coal seam dip angle is 13 ° on average from 3550 m to 4550 m, the folds are gentle and the water inflow per unit is 0 .0 0 3 3 L / sm. The relative gushing time is less than 3.5 m3 / t, which is ideal Fully mechanized mining block. Face shelving options to choose the type of hydraulic support. - Above 450 m, the coal seam angle is greater than 20 °, the support shall be non-slip and anti-down device. Goaf adopts all caving method.