煤炭工程 ›› 2016, Vol. 48 ›› Issue (10): 37-40.doi: 10.11799/ce201610013
• 施工技术 • 上一篇 下一篇
段昌瑞1,薛俊华2
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摘要： 为改善深部大采深高地应力开采条件下的留巷围岩应力环境，采用砌体梁理论分析了坚硬顶板开采条件下的沿空巷道矿压特征，提出了深孔预裂爆破放顶技术，即通过超前深孔预爆破和走向小水平转角钻孔群切顶技术预裂采场上方走向及倾向的厚硬顶板，周期来压作用下将顶板沿预裂面切垮，从而形成对上覆岩梁结构的支撑作用，减小了关键块的回转和下沉变形。
关键词: 厚硬顶板, 预裂切顶技术, 深孔爆破, 沿空留巷
Abstract: To reduce high geostress on surrounding rock of gob-side entry retaining in deep coal mining，weighing feature of gob-side entry retaining is analyzed base on key block of voussoir beam，So that we proposed the technology of presplitting blasting caving，including of deep hole pre-split blasting technology and strike small angle level drilling group roof cutting technology，cutting off the strike and dip direction of thick and hard roof in coal face，and the side of entry will formed under the action of periodic weightings, which can separate the goaf and support the overlying moving strata, and improve the surrounding rock stress environment，to achieve the goal of reducing broken length of working face roof and beam cantilevers of roof in goaf side.
中图分类号:
TD823
段昌瑞，薛俊华. 深井厚硬顶板预裂切顶技术研究[J]. 煤炭工程, 2016, 48(10): 37-40.
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http://www.coale.com.cn/CN/Y2016/V48/I10/37
