mining coal seam

Storage charaters of mining coal seam in Xinhua exploration field and change rule;

新华勘探区可采煤层赋存特征及变化规律

According to the biggest height of the risking zone and the transmitting fissure zone,the disastrous areas while exploiting the minable coal-beds below in the coming years are predicted.

本文依据井田范围内采空积水调查资料,探讨了采空积水的贮存分布规律,并采用冒落带及导水裂隙带最大高度的计算方法,预测了未来开采下伏可采煤层造成的漏水灾害区。

By combining the domestic and international actuality on very thin coal seam mining,the influence factors on the seam mining are analyzed step by step,the decisive factors which affect comprehensive evaluation result are sorted and selected,the technique guide line for the uneconomically minable coal seam is defined and the industrial index of the very thin coal seam exploitation.

研究了煤层赋存的地质特征与极薄煤层的开采工艺,结合国内、外极薄煤层的开采现状,对影响煤层开采的主要因素逐类进行分析,筛选出影响综合评价的主导因素,界定了非经济可采煤层的技术指标,对七台河地区极薄煤层开采的工业指标提出了建议,可为政府在矿产资源管理与制定相关政策方面提供参考性意见。

A simple method for predicting recoverable reserves of reservoir;

预测油气藏可采储量的一种简易方法

Easy determination of abandonment pressure and recoverable reserves for gas reservoirs with water drive;

确定水驱气藏废弃压力与可采储量的简便方法

A method to predict volumetric sweep efficiency and recoverable reserves of water-drive oilfields;

预测水驱油田体积波及系数和可采储量的方法