摘要
多层采空区结构十分复杂,空洞、裂隙、残留煤柱、巷道等分布情况难以准确把握,故为确保安全,在对其上方土地进行规划利用前必须选用合理可行的手段进行工程勘察,经过大量理论研究和工程实践证明,在勘察孔的施工过程中,根据冲洗液漏失、掉钻、异常进尺等情况,可初步判定采空区裂隙发育特征和导水裂隙带高度,在检查孔施工结束后,利用高分辨率的彩色钻孔电视对其进一步确认,可大幅度提高检测效果及检测精度。结合钻孔冲洗液漏失量观测法和钻孔电视探测技术对多煤层采空区进行了探测分析,确定了垮落带与裂隙带的发育深度,并结合掌握的地质采矿条件和观测资料初步判定了相关区域采空区整体结构的稳定性,为相关问题的研究提供一定的经验和借鉴。
The multi-layer goaf has complex structure. It is difficult to grasp the distribution of holes,fissures,residual coal pillars and roadways. To ensure safety,reasonable engineering investigation must be chosen before planning and utilizing the land on the goaf. Lots of theoretical researches and engineering practice proved that during the construction process of ex-ploration holes,the characteristics of fracture development and the height of water flowing fracture zone were preliminarily de-termined through observing drilling fluid leakage,drills failure and abnormal footage. And the accuracy and effect of detection was greatly improved by borehole television with high resolution after the construction completion of observing holes. Combining with the observation method of drilling fluid leakage and borehole TV system to make the detection analysis on multi-layer goaf,the developing depth of caving zone and fracture zone were determined. Based on grasping the geological and mining con-ditions and the observation information,the stability of the overall structure of the relevant regional gob can be judged,thus pro-viding some experience and reference for the study of related issues.
出处
《金属矿山》
CAS
北大核心
2015年第6期144-148,共5页
Metal Mine
