1.
3D seismic exploration technology for lower coal group in gob area
煤矿采空区下组煤三维地震勘探技术
2.
Risk evaluation of water inrush from seam floor during mining of lower group in Zhaizhen coal mine
翟镇煤矿下组煤开采底板突水危险性评价
3.
Analysis on geological condition of coal seam mining with presser in ZhangCun Mine
章村矿下组煤带压开采地质条件分析
4.
The Hydrogeological Characteristics and the Influence of Ordovician Limestone on Mining Lower-Group Coal Seam in Yanzhou Coal Field;
兖州煤田奥灰水文地质特征及对下组煤开采的影响研究
5.
Study on Hydrochemical Characteristics of the Lower Group Coal Seams' Main Discharge Aquifers in Nantun Coal Mine
南屯煤矿下组煤主要充水含水层水化学特征研究
6.
Research on Safety Effect of Limestone Water on Mining of Lower Seam Cluster in Liyan Coal Mine;
里彦矿灰岩水对下组煤安全开采影响的研究
7.
The Hydrogeological Characteristics and the Influence of Xujiazhuang-Limestone and Ordovician Limestone on Mining Lower-Group Coal in the Eastern Xinwen Coal Mine Area;
新汶矿区（东部）徐、奥灰水文地质特征及对下组煤开采的影响
8.
An Introduction to Coal-forming Plants in Xiahuayuan Formation,Yuxian Coalfield,Hebei Province
河北蔚县煤田下花园组成煤植物初探
9.
Improvement on Ventilation System of 8~# Coal in Malan Coal Mine North l
马兰矿北一下组8~#煤通风系统改造
10.
"'Under the Gaslight.'
“《煤气灯下》。”
11.
Underground drainage stystem is one of the important parts of safety production of coal mine.
煤矿井下排水系统是煤矿安全生产环节的重要组成部分。
12.
The Economical Analysis of Desulfurization with New Gridding Price in Coal-fired Units
新燃煤机组脱硫电价下的脱硫经济性分析
13.
Control technique of surrounding rock stability for main entry with underlie coal seams mined
下覆煤层组开采大巷围岩稳定性控制技术
14.
Xiahuayuan Formation Depositional Environment and Coal-accumulation Characteristics in Xuandong Mine Area, Hebei
河北宣东矿区下花园组沉积环境与聚煤特征
15.
coal-dust( left over after coal has been screened )
（煤经筛后剩下的）煤末.
16.
The main minable seamⅡ_1 belenged marshy sediment in delta plain.
认为山西组是在三角洲环境下形成的，主要可采煤层二1煤是三角洲平原上的沼泽沉积。
17.
Superficial View on Origin of Thin Coal Seam s in Low er Perm ian Tongziyan Form ation,Sanm ing Prefecture,Fujian Province
福建省三明地区下二叠统童子岩组薄煤层成因浅析
18.
Study On Coal Mining for protecting Ecological Water Level in the Ecological Fragile Mining Area
陕北生态脆弱矿区煤炭与地下水组合特征及保水开采