早强胶结充填体与矿岩相互作用机理分析

发布时间：2018-05-28 11:02

本文选题：早强充填体 + 石蜡　；参考：《金属矿山》2017年08期

【摘要】：早强胶结充填体与矿岩的相互作用机理是提高充填效率与效果的关键。为了研究早强胶结充填体与矿岩的相互作用机理,选用石蜡为研究对象,运用应变计、电阻应变片进行监测,进行裂纹扩展表征比较。建立数值模拟试验模型比较应变值和安全系数分布。通过对未充填、单充填体、双充填体、双充填体非对称分布、充填体蠕变失效等5种工况的比对研究,提出基于充填空区关键块撞击冲量的阶段矿房上向水平分层错开嗣后充填采矿法。试验结果表明:石蜡能够作为胶结充填体早期强度模拟材料;在矿房矿柱相邻水平错开回采能够有效减小应力集中;在同等荷载作用下能够减小充填空区侧帮的塑性破坏区面积。充填体发生失效后导致早强胶结充填体与矿岩相互作用的力学变形特征发生突变。
[Abstract]:The interaction mechanism between early cemented filling body and ore rock is the key to improve filling efficiency and effect. In order to study the interaction mechanism between early strength cemented filling body and ore rock, paraffin wax was selected as the object of study, strain gauge and resistance strain gauge were used to monitor and compare the characterization of crack growth. A numerical simulation test model was established to compare the distribution of strain and safety factor. By comparing the unfilled, single, double-filled, unsymmetrical distribution and creep failure of the filling body, a comparative study was made on the five working conditions, such as: unfilled, single filling, double filling, creep failure, etc. Based on the impinging impulse of the key block in filling empty area, the method of staggered horizontal stratification and backfill mining in the stage of mine house is put forward. The test results show that paraffin can be used as early strength simulation material of cemented filling body, and staggered mining in the adjacent level of mine pillar can effectively reduce stress concentration. Under the same load, the plastic failure area of the side of filling empty area can be reduced. The failure of the filling body leads to a sudden change in the mechanical deformation characteristics of the interaction between the early cemented filling body and the ore rock.
【作者单位】：武汉科技大学资源与环境工程学院;冶金矿产资源高效利用与造块湖北省重点实验室;
【基金】：国家自然科学基金项目(编号:51604195)
【分类号】：TD853.34

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