摘要
为了研究离石矿区上覆松软结构的厚煤层分层采动下裂隙分布及演化规律,采用工程地质力学模型试验的手段,分析研究了分层开采条件下,覆岩裂隙发育的工程地质力学机理及控制因素;揭示了采动影响下覆岩裂隙是至下而上呈梯形分布的破坏与变形规律。在第一层回采完的导水裂隙发育高度为40m,第二层回采完时裂隙贯通整个覆岩层。为工程实践和采矿安全提供理论依据。
To investigate fracture distribution and evolution law of thick coal seam with overlying weak structure by slice mining in Lishi mining area, the engineering geomechanies model was used to analyze engineering geomechanies mechanism of overburden fissure development and control factor in slice mining. It revealed that failure and deformation law of overburden fissure under induced influence were echelon distribution from lower to upper. The height of water flowing fractured development after stoping of the first layer was 40m. Fissure ran through the whole overburden layer after stoping of the second layer. It provided theoretic basis for engineering practice and mining safety.
出处
《现代矿业》
CAS
2009年第1期60-62,共3页
Modern Mining
关键词
分层开采
厚煤层
裂隙发育
地质力学模型
Slice mining
Thick coal seam
Fracture development
Geomechanics model
