short hole method

用法例句

The problems existing in shallow-hole blasting open-stoping method were analyzed.

简述了瑞滇铁锌矿矿山开采技术条件,分析了原有的浅眼落矿空场采矿法存在的问题,结合矿山具体条件,研究提出了适宜的无底柱分段崩落采矿法,并对采场结构参数进行了优化,提高了采矿效率。

The forming condition and existing state of land collapse basins for shallow mining in a coal mine were investigated completely in this paper.

全面调查了某矿浅部开采地面塌陷坑的形成条件及存在状态 ,采用模糊聚类分析方法对地面塌陷坑进行了科学的分类 ,分析了塌陷特征及其对井下危害程度 ,提出了消除塌陷坑对井下危害、恢复矿区生态环境的防治目标及具体原则 ,研制出地面塌陷坑治理的四种方案 ,即①排除积水 ,构筑隔水层 ;②煤矸石充填塌陷坑复垦土地 ;③利用塌陷坑发展养殖 ;④因地制宜 ,综合治理。

American Western Placer Mining and It s Effect(1848-1878);

美国西部矿业的浅层开采及其影响（1848—1878）

Research on Aquiclude's Broking Law of Longwall Mining in Shallow Seam;

浅埋煤层长壁开采隔水层破坏规律研究

Study on the Failure of Overlying Rock in Mining Shallow Thick Coal Seam by Slicing Method;

浅埋厚煤层分层开采覆岩破坏规律研究

SIMULATION OF CLAY AQUIFUGE STABILITY OF WATER CONSERVATION MINING IN SHALLOW-BURIED COAL SEAM

浅埋煤层保水开采隔水层稳定性的模拟研究

Study on Ground Pressure Characteristic of Shallow Coal Seam Longwall Mining and Its Safe Exploitation Demarcation;

浅埋煤层长壁开采矿压特点及其安全开采界限研究

The Study of Fire-Prevention Techniques in Nitrogen-Injection of Mechanized Top Caving Mining of Shallow Thick Seam;

浅埋厚煤层综放开采注氮防火技术研究

Technological Study of Resonably Determining the Upper Limits of Mining on Shallow Embedding Coal Seam;

浅埋深煤层合理确定开采上限技术研究

Research on Evolvement of Shallow Groundwater System Impacted by Exploiting in North China Plain;

开采条件下华北平原浅层地下水系统演变研究

Study on Damage Mechanics of Groundwater and Control Methods in the Mining of Shallow Embedding Coal;

浅埋煤层开采对潜水的损害与控制方法研究

Analysis on Roof Structure s Stability of Longwall Mining in Shallow Seam;

浅埋煤层长壁开采顶板结构稳定性分析

Simulation Research and Actual Measurements on Water Conservation Mining and Overlayer Strata Movement of Thick Base Rock Shallow Seam

近浅埋煤层保水开采覆岩运动模拟研究与实测

Discussion on Coal Dust and its Control Techniques in Mining of Thick Coal Seam

浅析厚煤层综放开采煤尘及其防治技术

A technical research on the air leakage prevention technology for use in mining shallow and composite coal seams

浅埋藏复合煤层开采漏风防治技术研究

Study on the Mining Method with Lofty Roof and Floor under Shallow Overburden Condition

浅埋深松软顶底板褐煤层开采方法的研究

Research of Horizontal Well Technology Used in Shallow Least Permeable Aquifer Groundwater Extraction

浅层低渗透性含水层水平盲井开采技术研究初探

Application of Horizontal Directional Drilling Technology in Shallow Least Permeable Aquifer Groundwater Extraction

导向钻进铺管技术在浅层低渗透性含水层地下水开采中的应用

Research on the Top Coal Caving and Drawing Characteristics of Caving Roof Coal Mining for Shallawly Buries and Hard-Thick Coal Seam;

浅埋藏坚硬特厚煤层放顶煤开采顶煤冒放性研究

The Technology and Usable Conditions Classification of Aquifer-Protective Mining in Shallow Sand-Bedrock-Coal Seam;

沙基型浅埋煤层保水开采技术及其适用条件分类