厚煤层开采垮落带及导水裂缝带高度探测方法

Thick coal seam mining caving zone and water flowing fractured zone height detection method

为研究厚煤层综放开采（一次采全高放顶煤）、中硬~坚硬覆岩条件下厚煤层开采顶板垮落带及导水裂缝带发育高度,以鹤岗矿区为例,采用冲洗液漏失量观测、水位观测,井下彩色电视观测法、超声波成像测井法等现场实测方法及室内相似材料模拟、FLAC3D数值模拟等方法进行探测研究,确定其垮落带及导水裂缝带高度,推导了适合鹤岗矿区厚煤层开采的垮落带及导水裂缝带高度的预测公式,对其进行了验证,总结出了适合厚煤层顶板垮落带及导水裂缝带发育高度的探测体系。

The paper takes Hegang mining area as an example to study thick coal seam fully-mechanized mining（overall top-coal mining height）, thick coal mining roof caving zone and the height of water flowing fractured zone under the condition of mid-hard and hard overburden rock. Detection research has been conducted with field measurement methods like the flushing fluid loss,water level observation,downhole color TV observation method,ultrasonic imaging well logging method and similar material simulation and FLAC3 Dnumerical simulation method, etc. to determine the height of caving zone and water flowing fractured zone. This paper derived and verified height prediction formula of thick coal seam mining caving zone and water flowing fractured zone in Hegang mining area and summarized suitable detection system for thick coal seam roof caving zone and water flowing fractured zone height.