gob caving

According to the theory of seepage and mechanics and the characteristics of gas mitigation during the large area roof caving in goaf under the fast and high-duty mining activities,the goaf was a continuous seepage spatial field,the transport mechanisms of the gas were dispersion,diffusion in fact,ventilation transits from turbulence in working face to laminar deep goaf.

根据高强度快速推进条件下大空间采空垮落区瓦斯运移的特点,按照渗流力学理论,将采空区视为连续的渗流空间,瓦斯在采空区实际是机械弥散和分子扩散引起的散布过程,通风风流流动状态是由工作面湍流向采空区深部层流的过渡状态。

Roof rock drilling pulls out gas at gob caving band and gob caving slit band,redules gas consistency In stope corner and return airway and avoids stope corner and return airway gas overrun,at the same time,the wind speed overrun is settled at stope.

告成煤矿的主采二1煤层属典型“三软”厚煤层,回采工作面隅角和回风流中瓦斯体积分数超限的主要原因是采空区瓦斯涌出过多,采取顶板岩石钻孔的方法对采空区冒落带及冒落裂隙带的瓦斯进行抽放,降低了回采工作面隅角和回风流中的瓦斯体积分数,避免了采煤工作面隅角和回风流瓦斯体积分数超限,同时克服了工作面风速超限的问题。

Numerical model of nonlinear flow-diffusion for gas mitigation in goaf and atmosphere

采空垮落区瓦斯非线性渗流-扩散模型及其求解

Research on Air Bumping Disaster Induced by Large Roof Falling in Goaf

采空区顶板大面积垮落的空气冲击灾害研究

DETERMINING THE HEIGHT OF COLLAPSE AND FRACTURE ZONE WATER-TRANSMITTING IN MINED-OUT AREA BY MEANS OF BOREHOLE

利用钻孔确定采空区垮落带和导水裂隙带高度

Application of short wall fully caving coal mining method in Shendong coal mine area

短壁全部垮落采煤法在神东矿区的应用

Roof breaking law along top-coal caving face

综放开采沿工作面倾向顶板垮落规律

The Theoretical Study on Cyclone Disaster Caused by Stope Roof Falling over Great Extent;

采场顶板大面积垮落的飓风灾害的理论研究

Research On Mining Technology of No-pillar Complete Caving Shortwall Mechanization

无煤柱完全垮落短壁机械化开采技术研究

The Investigation on Roof Falling Morphology and the Gas Migration Law in Goaf under the Condition of Drainage

抽采条件下采空区覆岩冒落形态与瓦斯运移规律的研究

Modeling Experiment for the Rock Movement During Grouting Backfill in Caving Area with Strip Mining

条带间垮落区注浆充填覆岩移动规律研究

Research on Reliability of Mining Near Subsided Cavity

塌陷采空区近区安全开采可靠性研究

Practice of Supporting Method with Small Wooden Stand in the Residual Stones of Caving Mining Area

小木架支护法在冒落采区残采矿石中的实践

Study on the Gas Migration in the Goaf Filling of Full-mechanized Mining Working Face

综采工作面充填开采采空区瓦斯运移研究

The Applied Research of Gas Drainage Technology in the Goaf of Full-Mechanized Mining Working Face

综采工作面采空区瓦斯抽采技术的应用研究

Collapse Stope Disposing and Mining Practice of Impaired Mined-out Area Residual Mining

塌陷采场处理及采空区破坏残矿开采实践

The Study on Risk Assessment of Goaf Ground Collapse Disaster in Cheng-he Mining Area

澄合矿区采空区地面塌陷危险性评价

Distribution characteristic of remaining coal oxygen consumption and spontaneous combustion heating-up in goaf

自燃采空区耗氧-升温的区域分布特征

Haines from the corner where he was knotting easily a scarf about the loose collar of his tennis shirt spoke:

海恩斯在角落里正松垮垮地往他的网球衫那宽松领口系领巾，他说：

The Southern of Ningxia Rural Settlements Space Research;

宁夏南部地区乡村聚落空间形态研究