coalpit

Influence of Small Coalpit Developing on Environment And Soil And Water Conservation

小煤窑开采对环境与水土保持的影响

The application of time weighted average concentration for the dust monitoring in coalpit ;

广泛基础加权平均条款适用于所有以往发行的股票及当时进行发行的股票。

Objective : To study the method of monitoring and calculation for the dust concentration in coalpit .

目的：探索煤矿井下煤矿粉尘浓度的监测方法与计算方法。

The foundation treatment for the area of coalpit goaf

小煤窑采空区地基处理

Methods The animal 's model of injury caused by gas explosion was made in imitating coalpit tunnel .

方法建立模拟煤矿井下瓦斯爆炸伤动物模型。

Prediction of the Influence Caused by the Coalpit Water Supply 's Pumpage on the Yanhe Spring Discharge

煤矿水源地开采对延河泉泉水流量影响的预报

Coal mining in remote mountainous district mainly on drift of coalpit , and its influence on surface deformation has already been attention .

偏远山区矿山开采多以小窑掘进为主，其对地表变形的影响已引起人们的重视。

Application of the grouting filling technology in goaf on fully mechanized top coal caving mining face through the large coalpit Application of Reinforcement Technology with Grunting in Full-mechanized Mining through Empty Roadway

综放工作面过小窑采空区注浆充填技术应用注浆加固技术在综采面过空巷中的应用