隰县谙正村一带煤矿其他开采技术条件评价

Evaluation of Mining Technology Conditions in Coal Mine Around Anzheng Village of Xi County

通过对隰县谙正煤矿勘探区勘探资料的研究与总结,详细研究了主要可采煤层顶底板的工程地质特征、煤层瓦斯、煤的自燃倾向性、煤尘爆炸危险性及地温变化等开采技术条件,最终确定:井田工程地质勘探类型为第三类;井田属瓦斯矿井;井田内各主要可采煤层的煤尘均具有爆炸性;井田内主采煤层自燃倾向性等级属容易自燃或自燃煤层;井田恒温带在150~250 m左右,地温变化梯度为2.5℃/hm,属正常,可采煤层范围内不存在热害区。

Through the analysis and summary of exploration data of Anzheng Coal Mine in Xi County, this paper studies the mining technology conditions of minable coal seam roof and floor fi＇om engineering geological characteristics, coal seam gas, spontaneous combustion tendency of coal, risk of coal seam explosion and change of ground temperature. The results show that engineering geological exploration type of the mine is the third one, the mine belongs to gassy mine, the coal dust in workable coal seams is explosive and the spontaneous combustion tendency of main coal seam is easy spontaneous combus- tion. When the constant temperature zone of mine is about 150-250 m, the geothermal gradient is 2.5 ℃/hm, there is no ther- mal damage zone in workable bed.