孤岛面沿空掘巷煤柱尺寸优化及能量分析

发布时间：2018-09-01 09:25

【摘要】：针对王庄煤矿深部采区8102孤岛面特殊生产地质条件,建立数值模拟计算模型,分析煤柱宽度对侧向支撑压应力、巷道表面位移、塑性区分布和巷帮应力等参量的影响规律;开发单元可释放弹性应变能计算及其与TECPLOT耦合分析程序,研究了孤岛面沿空掘巷煤柱中弹性应变能密度的分布特征。结果表明:随着煤柱宽度增大,可释放弹性应变能密度增加,耗散应变能密度减小。煤柱宽度为5 m时,煤柱中形成两部分楔形区域,损伤破坏严重;当煤柱宽度大于10 m时,煤柱中存在稳定的弹性核,可释放弹性应变能密度分布梯度较小,可避免因弹性能急剧集聚而发生的动力灾害。
[Abstract]:According to the special geological conditions of 8102 isolated island surface in the deep mining area of Wangzhuang Coal Mine, a numerical simulation model is established to analyze the influence of coal pillar width on the lateral support compressive stress, roadway surface displacement, plastic zone distribution and roadway side stress. The elastic strain energy can be released from the development unit and coupled with the TECPLOT analysis program. The distribution characteristics of elastic strain energy density in the coal pillar with isolated island face along the gob roadway are studied. The results show that the elastic strain energy density increases and the dissipative strain energy density decreases with the increase of coal pillar width. When the width of coal pillar is 5 m, two parts of wedge region are formed in the pillar, and the damage is serious. When the width of coal pillar is more than 10 m, there are stable elastic nuclei in the pillar, which can release the elastic strain energy density distribution gradient is smaller. It can avoid the dynamic disaster caused by the agglomeration of elastic energy.
【作者单位】：中国矿业大学深部岩土力学与地下工程国重点实验室;中国矿业大学力学与土木工程学院;
【基金】：国家自然科学基金项目(51674250,51323004) 江苏省“六大人才高峰”高层次人才计划项目深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1409);深部岩土力学与地下工程国家重点实验室专项基金项目
【分类号】：TD822.3

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