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首页> 外文会议>International Conference on Water Resources and Environment >Overburden failure height and fissure evolution characteristics of deep buried, extra thick coal seam and fully-mechanized caving mining of China
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Overburden failure height and fissure evolution characteristics of deep buried, extra thick coal seam and fully-mechanized caving mining of China

机译：深层埋藏，超厚煤层和全力化机械矿井覆盖物失效高度和裂缝进化特性

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摘要

Characteristics of fissure development evolution and height of overburden failure of important significance for prediction of gas and mine water. Taking Dafosi coal company as the experimental mine, by borehole televiewer system and borehole flushing fluid leakage, the height of water flowing fractured zone of overburden, deep buried, extra thick coal seam and fully-mechanized caving mining is monitored. The digital analysis, similarity simulation and numerical simulation experiment of fissure development evolution are carried out. The research results show as follows: (1) The height of water flowing fractured zone of overburden, deep buried, extra thick coal seam and fully-mechanized caving mining Dafosi mining is from 170.8 m to 192.12 m. (2) In sandstone zone, due to tension effect, the fissure of criss-cross is mainly with high dimension and high angle. (3) The mining-induced fractures characteristics are mainly with high angle, low width and minimum length, the fissure evolution amount is square increasing with the buried depth. (4) The mining-induced fractures are be obvious regular change related to mining speed, the more mining speed the more closing of fissure fast. (5) The fissure cluster region focus on before and after the coal wall, the fractures density distribution curves of overlying strata are like "snake".
机译：裂缝发展的特点及覆盖覆盖率的高度重要意义对煤气和矿井水预测的重要意义。将Dafosi煤炭公司作为实验矿井，通过钻孔电视机系统和钻孔冲洗液体泄漏，监测覆盖层的水骨折，深层埋藏，厚厚的煤层和全机械化露出采矿的水的高度。进行了裂缝发展进化的数字分析，相似性仿真和数值模拟实验。研究结果表明如下：（1）水流骨折骨折的水平，深埋，厚厚的煤层和齐全的煤层齐全的大法挖掘为170.8米至192.12米。 （2）在砂岩区，由于张力效果，裂缝的裂缝主要具有高尺寸和高角度。 （3）采矿诱导的裂缝特性主要具有高角度，低宽度和最小长度，裂缝演化量是随着埋地深度的平方增加。 （4）采矿诱导的骨折是与采矿速度相关的明显定期变化，采矿速度越多，裂隙越快就越快。 （5）裂缝簇区域专注于煤墙前后，覆盖层的裂缝密度分布曲线就像“蛇”。

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