摘要
承压水体上对拉面开采的错距对底板岩层破坏的影响只是局部的和暂时性的。当工作面开采达到一定规模后,底板岩层破裂最大深度取决于宏观开采技术参数和地质条件,底板岩层现时的和最终的破裂深度不因开采错距的大小(5～30 m)而改变。以淮北杨庄矿承压水体上对拉工作面开采为研究背景,通过现场矿山压力观测、数值模拟分析,认为对拉面错距在10 m以内为宜。
The influence of staggered distance on the failure of floor strata in double-longwall mining on the confined aquifer is local and temporary. After longwall mining having reached a certain scale, the failure depth in floor strata depends on macroscopic parameters of mining technology and geological conditions. The current and ultimate failure depth of the floor strata does not change due to the magnitude of mining staggered distance (5-30 m). Based on the mining geological conditions of a practical double longwall mining panel, a rational staggered distance of double-longwall faces is proposed to be within 10 m, by means of observing the changes of in-situ abutment pressure and 3 D coupled numerical modeling of fracture in floor strata.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第1期48-52,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家杰出青年基金(50025413)
国家自然科学基金(49872053)资助项目。
