火成岩侵入条件下工作面放顶技术  

Caving Technology Under Condition of Igneous Rock Invading in Face

作　　者：迟占国 

机构地区：[1]中煤平朔集团有限公司,山西朔州036000

出　　处：《煤矿安全》2014年第8期101-103,共3页Safety in Coal Mines

摘　　要：火成岩的侵入导致某矿10#煤层赋存不稳定,顶板局部地段过于坚硬,工作面回采期间顶板空顶范围过大,对工作面的安全生产造成重大威胁,针对以上情况,开展工作面放顶技术研究。研究表明:顶板不能充分垮落时,必须采取"切顶排加强支护+人工强制放顶"措施处理坚硬顶板;放顶线上另增密集支柱的线密度nzmc为5.85根/m,可保证工作面初放阶段安全回采;为保证切断顶板,应在放顶排正常支柱之间加强布置1根支柱,则支柱柱距由0.5 m变为0.25 m。The intrusion of igneous rock leads to the unstable occurrence of 10# coal seam and the hardening of partial area of the roof. During the extraction of the coal face, the exposure area of the roof was relative large, which posed a significant threat to the safe pro- duction of the coal face. In line with the above - mentioned conditions, studying coal face caving technology is launched, research re- sults show that the measure called ＂ roof - cutter strengthen support plus artificial forced caving＂ must be taken to handle with hard roofs when a fully caving of the roof cannot occur; linear intensity （ nzmc ） of intensive props supplemented on the caving line is 5.85 per meter, which can guarantee the safe extraction of the coal face at the stage of initial caving; in order to ensure the cutting - off of the roof, a prop should additionally laid out between the normal props of the caving row, in this case, the column space of the props should decreased from 0.5 m to 0.25 m.

关 键 词：火成岩侵入 放顶技术 切顶排加强支护 人工强制放顶 

分 类 号：TD327.2[矿业工程—矿井建设]