复杂建筑群下煤柱留设的优化设计研究

Study on the optimization design of coal pillar under the complex buildings

为解决建筑群下压煤问题,针对现有矿区保护煤柱留设方法的局限性,提出利用矩形分块垂直剖面法留设保护煤柱,并结合实际地质采矿条件,给出了煤柱尺寸的计算公式,提出了角点煤柱的优化设计理论。研究表明,这两种方法可依据受护对象的保护等级和开采煤层厚度等因素,合理确定地面工程保护煤柱的范围,既保护了敏感目标,又大大解放了"三下"压煤量,使保护煤柱的设计更加合理。

In order to solve the problem of the pressed coal under buildings, to the limitation of the existing methods for the set of protecting coal pillar, this paper puts forward the rectangular block vertical section meth- od for protecting coal pillar＇ s design, presents the calculation formula of the coal pillar dimension and the op- timal design theory of the angular point＇ s coal pillar, combining with the actual geological and mining condi- tions. Studies have shown that, this two methods can make a proper scope for protecting coal pillar of the ground engineering according to the object＇ s protection level and the other factors such as the thickness of the working seam, which both protect the sensitive target, and greatly liberate pressed coal for the ＂three unders＂ mining, and make the protecting coal pillar design more reasonable.