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通过对鄂尔多斯龙王沟煤矿6煤进行大采高大放高(采5 m放15 m)开采相似材料模拟对比实验得到,在6_上煤未采情况下6煤工作面支架额定阻力为15 000 k N时可以保证工作面的安全生产,在6_上煤已采情况下,6煤工作面矿压显现十分剧烈,液压支架频繁压死并出现“天量”工作阻力,频繁出现拱结构超前于工作面的情况,工作面煤壁出现贯穿竖向断裂裂隙,严重片帮。证明了在6_上煤采空区下进行6煤大采高综放开采不可行。
Through the comparative experiment of similar materials for 6 coal mining in Longwanggou Mine in Ordos Longgang Mine with a height of 15 m (coal mining of 5 m), the nominal resistance of coal face 6 coal mining face is 15 000 k N can ensure the safe production of the working face. When the coal has been taken on the 6th coal seam, the underground pressure of 6th coal working face appears very violently, the hydraulic support often crushes to death and the working resistance of " Advance in the face of the situation, the face appears through the coal wall vertical fracture, a serious piece of help. It is proved that it is not feasible to carry out 6 coal seam with high fully mechanized top-coal caving under the 6_3 coal goaf.