“上柱-下垮”复合残采区中部残煤开采可行性评价

发布时间：2019-06-21 02:57

【摘要】：针对白家庄煤矿"上柱-下垮"复合残采区中部残煤的安全开采问题,采用实验手段研究了多重采动影响下中部残煤采场岩层的垮落特征、应力分布规律及塑性区分布范围,结合弹塑性力学理论分析了上下煤层开采造成的损伤破坏范围,对中部残煤开采可行性进行了研究。研究表明:(1)上下煤层的采动影响并未破坏中部残煤的宏观连续性,且在中部残煤开采过程中,上覆岩层结构相对稳定;(2)采场岩层的支承压力与塑性区的分布范围基本一致,二者皆可以评价上下煤层开采后层间岩层的损伤破坏范围,其损伤范围包含整个上位层间岩层和下位层间岩层的局部范围;(3)中部残煤主要受上部煤层开采影响,处于上部煤层开采损伤破坏范围之内,因此在中部7号残煤开采过程中,其采场顶板稳定性较差,应采取合理有效的顶板控制措施保证安全生产。
[Abstract]:Aiming at the problem of safe mining of residual coal in the compound residual mining area of Baijiazhuang Coal Mine, the collapse characteristics, stress distribution law and plastic zone distribution range of residual coal stope in the middle part under the influence of multiple mining are studied by experimental means. The damage and failure range caused by upper and lower coal seam mining is analyzed combined with elastic-plastic mechanics theory, and the feasibility of residual coal mining in the middle part is studied. The results show that: (1) the mining effect of the upper and lower coal seams does not destroy the macro continuity of the residual coal in the middle part, and the overlying strata structure is relatively stable in the process of residual coal mining in the middle part; (2) the distribution range of supporting pressure of stope strata is basically the same as that of plastic area. Both of them can evaluate the damage and failure range of interlayer strata after mining in upper and lower coal seams, and the damage range includes the local range of the whole upper interlayer strata and lower interlayer strata; (3) the residual coal in the middle part is mainly affected by the mining of the upper coal seam and is within the damage and failure range of the upper coal seam mining. Therefore, in the process of mining the No. 7 residual coal in the middle of the coal, the roof stability of the stope is poor, and reasonable and effective roof control measures should be taken to ensure the safety of production.
【作者单位】：太原理工大学矿业工程学院;山西省绿色矿山工程技术研究中心;太原理工大学采煤工艺研究所;太原理工大学建筑与土木工程学院;
【基金】：国家自然科学基金优秀青年科学基金资助项目(51422404);国家自然科学基金面上基金资助项目(51574172) 山西省中青年拔尖创新人才基金资助项目
【分类号】：TD823

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