祁南煤矿6煤组薄煤层支护强度研究

Thin CoalBed Supporting Intensity Exploration of No.6 Coal Group in Qi′nan Coal Mine

祁南煤矿现开采中组薄煤层,由于地质方面的原因,使巷道支护困难,矿井开采难度较大。通过对祁南煤矿61煤层掘进支护的探索,找到了解决祁南煤矿中组薄煤层(61、62、63)巷道压力大、支护难问题的方法:采用锚架复合支护,即"锚网(初次支护)+滞后套U29型钢棚(二次支护)联合支护",巷道采用拱形断面。

The current coal mining seam of Qi＇nan Coal Mine is thin seam in middle group. Based on the complex geological conditions, the supporting of the roadway is very difficult ,and it is hard to mine coal. Through the discussion of driving support of 61 Coal Seam in Qi＇nan Coal Mine,the solution of roadway large-pressure and supporting difficulty was proposed to deal with the problems of thin coal seam in middle coal seam group（61 ,62 ,63 ） ：using anchor rack compound supports and protections,that is,＂ Compound support by bolting with wire mesh（ initial supporting） ＋ setting U29 steel shed（ secondary supporting） ＂ ,and the roadway is arched section.