煤层顶板导水裂隙带发育高度工程地质模拟研究——以黑龙江省新发煤矿29^#煤层为例

An Engineering Geological Simulation Study on Coal No.8 Roof Water Conducted Zone Development Height——A Case Study of Xinfa Coalmine Coal No.29 in Heilongjiang Province

煤层顶板导水裂隙带发育高度是煤矿设计部门在留设防、隔水煤柱时必须考虑的一个重要参数,对煤矿水体下采煤、顶板防治水具有重要意义。采用实验室工程地质模拟方法,对新发煤矿29#煤层顶板导水裂隙带发育高度进行模拟,模拟的导水裂隙带发育高度为26.3 m;运用关键层理论,计算的导水裂隙带高度为28.29 m。综合确定导水裂隙带发育高度为26.3 m。实验室工程地质模拟方法及应用实例为地质条件相似矿区解决开采上限、留设防(隔)水煤柱等问题提供了方法和数据支持。

Coal roof water conducted zone development height is an important parameter should be considered in barrier pillar setting,and has significance to coal mining under surface water body and roof water control. Using laboratory engineering geological simulation carried out coal No.29 roof water conducted zone development height simulation. Simulated water conducted zone height is 26.3m; using key strata theory estimated water conducted zone development height is 28.29. Comprehensively determined water conducted zone development height is 26.3m. The study has provided method and data support for upper mining limit determination and barrier pillar setting issues.